Bsi bs cecc 00015 1 1991 scan

CECC 00015 : BRITISH STANDARD BS I p art1 : 9 Harmonized s y s tem of quality as s es s m en t fo r el ectro ni c comp onents B asic sp ecification: Protection of electrostatic sensitive devices Part General requirements S y s tème haimo nis é d’ as s uranc e d e la q u al i té S p éc ific atio n d e b as e: Pro tec tio n d e s p ro duits s ens ib les a u x déc harg es élec tro s tatiques Parti e Règles g énérales H armo nis iertes Güteb es tätig ung s s ys tem fü r B auelemente d e s c o mp o s ants élec tro niques d e r Elektro nik Grunds p ez ifikatio n: S c hutz vo n Elektro s tatis c h Teil G e fäh rd e te n B auelementen Allgemeine Anfo rdeiiing en [ : : : : : : , _ , := :a :- - BS CECC 00015 Part 1991 : : Cornrnittees responsible for this British Standard T he p re p arati o n of this B ritis h S tandard was e n tru s te d by t h e Elec tro nic C o mp o nents S tandards Policy C o mmittee (ECL/- ) to Technical C o mmittee EC L/23 , u p o n w hic h As s o c iatio n of t h e following b o dies w e re Franc his ed D is trib uto is B ritis h El e c tro - s tati c Manufac turers ' of re p re s e nte d: Elec tro nic C o mp o nents As s oc iatio n B ritis h El e c tro s tati c C o ntro l As s ociation B ritis h Plas tic s Federati o n B ritis h Telec o mmunic ati o ns plc EEA ( The As s o c iatio n of Elec tro ni c s , Telec o mmunic atio ns and B us ines s Equ i p me nt Indus tries ) Elec tro nic C o mp o nents I n d u s ti y Federation GAMBICA (BEAMA Ltd ) He al th an d S afe ty Exec utive Minis try of D efenc e Natio nal S up ervis i ng I ns p e c to rate This B riti s h S tan d ard , b e e n p re p are d di re c ti o n u nde r of t h e C o mp o ne n ts C o mmi tte e , Linder t h e El e c tro n i c S t a n d a r d s Policy w as O p u b l i s he d au th o ri ty S t a n d a r d s B o ard e ffe c t o n 20 hav i n g th e of t h e a n d c o me s i n t o D ec emb er Amendments issued since publication 991 Amd B SI 991 T h e fo llo w ing BSI r e fe r e n c e s re l ate t o the wo rk o n thi s s tan d ard: C o mmi tte e r e fe r e n c e EC L/23 D r a ft fo r c o m m e n t 0/24 09 ISBN O 580 20336 O DC No D ate ' Ikxt affe c te d BS CECC 0001 : Part : 991 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Policy Committee It is identical with CECC 00015/1 1991 ‘Basic Specification: Protection of Electrostatic Sensitive Devices Part General requirements’, published by the CENELEC Electronic Components Committee (CECC) This standard supersedes BS 5783 1987 which is withdrawn It is envisaged that further Parts of CECC 00015 be published as follows CECC 00015 Part Particular requirements for low humidity areas; CECC 00015 Part Particular requirements for clean rooms; CECG 00015 Part Particular requirements for areas with high voltages present On publication of the further Parts of CECC 00015 equivalent Parts of BS CECC 00015 be published in due course : : : will : : : : : : will Cross-references International standard Corresponding B ritish Standard BS 6233 1982 Methods of test for volume resistivity and IEC 93 surface resistivity of solid electrical insulating materials (Identical) The %chnical Committee has reviewed the provisions of IS0 2878 to which reference is made in the text and has decided that they are acceptable for use in conjunction this British Standard related British Standard to IS0 2878 is BS 2050 1978 ‘Specificationfor electrical resistance of conducting and antistatic products made from flexible polymeric material’, : with A : Compliance with a British Standard does not of itself confer immunity from legal obligations i Förderverein für Elektrotechnische Normung (FEN) e V Cen el ec Electron ic Components Committee CECC Système Harmoni sé d’Assurance de l a Qu alité des Composants Electroniques SPECI FI CATI ON DE BASE: PROTECTION DES PRODUITS SENSIBLES AUX DECHARGES E LECTROSTATIQ U ES PARTIE I : REGLES GENERALES Harmonized System of Quali ty Assessment for Electronic Components BAS I C SPEC I FI CATI O N : PROTECTION OF ELECTROSTATIC SENSITIVE DEVICES PART I : GENERAL REQUIREMENTS Harmonisiertes Gütebectätigungssystern für Bauelemente der Elektronik Edition Issue Ausgabe G R U N DSPEZI FI KATI ON : SCHUTZ VON ELEKTROSTATISCH GEFÄHRDETEN BAUELEMENTEN TE I L I : ALLGEMEINE ANFORDERUNGEN C E C C 0 5/1 991 Pages Contents Foreword Preface Section one General 1 1 General Scope Definitions 5 Section two Design consideration to minimize the effects of ES D 2 2 Design Identification Design of electrostatic discharge sensitive devices (ESDS) Design of assemblies Packaging design System design Design evaluation procedure Section three Labels signs 3 3 4 4 4 4 1 fo u r ES D 5 5 5 8 9 10 marking 10 10 11 11 Protected Area (EPA) 15 Configuration Control boundaries Basic material requirements for use within the controlled boundaries of all forms of ESD Protected Area (EPA) Ionization Humidity Construction of the ESD protected area (EPA) Field work Tools Fittings Test and process equipment EPA working practice Section five Protective identification for ESDS and 8 Labels Signs for ESD protected area (EPA) Marking of earth bonding points, earth grounding points and ESD earth facilities Marking of documentation Section marking packaging 15 5 18 19 19 24 25 25 26 26 and 33 Packaging materials Intimate packaging materials Proximity packaging material Secondary packaging material Marking and identification Package/component compatability 33 34 34 35 35 35 CECC O0 01 Issue BSI B S UC E C C 0 5: * P T* L 91 m 162 669I 7 Pages Contents S e ct i on six 6 6 6 P urchas e, receipt, 36 storage and handling 36 36 36 37 37 38 General Purchase Receipt Unpacking within an EPA Goods inward inspection Movement and handling S ect ion seven Training 39 S ect ion eight Quality responsibilities 40 Personnel responsibilities 8 8 8 Local co-ordinator 40 40 40 Selection of ESD materials Procurement records Procurement of ESDS components and subcontracted work Des i gn Checking of electrostatic precautions 8 Frequent checks 8 1 Dai l y checks Veekly checks Monthly checks S i x monthly S ect ion nine 41 41 41 41 41 41 43 43 43 44 Periodic audi t instructions Periodic audit instructions 44 A Tes t procedures A l A Surface resistivity and resistance to ground Charge decay A Measurement A Additional tests A Measurement 46 46 48 49 50 51 Annex of antistatic properties of relative humidity Figures 1A 1B Examples of earth grounding point labels 12 13 14 14 14 Schematic of typical EPA 28 Warni ng s i gn for ESD protected area Examples of earth bonding point labels 29 Example of an EPA showing typical facilities A 12 Warning label for ESDS Examples of ESD earth facility labels 10 12 ESDS basic symbol ESDS simplified symbol 31 32 52 53 53 Fi el dwork implementation of EPA A A Fi el dwork implementation of EPA with bench Charge measuring equipment Capacitive sensor Electrostatic shielding test equipment CECC O0 01 Issue m BSI BS*CECC 0001 5: *PT*l 93 3b24bb9 7 90 ö W ~~ ~ ~ Contents Pages Tables User guide chart in ESD prot ected User guide chart Suggested format Suggested format resistance, resistivity and charge decay areas for packaging materials for report (front sheet) for report (continuation sheet) CECC O0 01 54 55 56 57 I s s ue B S I BS*CECC 0003 5-*PT*1 91 m Lb24bb9 0273793 T W FOREWORD The CENELEC Electronic Components Committe (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization ( CENELEC) who wish to take part in a harmonized System for electronic components of assessed quality The obj ect of the System is to facilitate international trade by the harmonization of the specifications and quality assessment procedures for electronic components, and by the grant of an internationally recognized Mark, or Certificate, of Conformity The components produced under the System are thereby accepted by all member countries without further testing This basic specification has been formally approved by the CECC, and has been prepared for those countries taking part in the System who wish to issue nat ional harmoniz ed specifications for t h e P r o t e c t i o n of E l e c t r o s t a t i c S e n s i t i v e D e v i c e s It should be read in conj unction with the current regulations for the CECC System At the date of printing of this specification, the member countries of the CECC are Austria, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom, and copies of it can be obtained from the addresses shown on the blue f l y sheet p RE F AC F; This specification was prepared by CECC TF - ESD The text of this specification was circulated to the CECC for voting in the document( s) indicated below and was ratified by the President of the CECC for printing as a CECC Specification Document CECC ( Secretariat) 599 Pate of votina November 1990 Report on the voting CECC( Secretariat) 2717 CECC O0 015 Issue B S I BS*CECC 0 5: * P T* 73 H 62 4669 0273772 ~~ ~~ ~ Section one General General 1.1 scope This standard specifies the general requirements for the protection of electrostatic discharge sensitive devices from electrostatic discharges and fields It applies only to electronic devices and assemblies For areas with exposed conductors at potentials greater than or , s kV d c , additional requirements specified in CECC O0 shall apply (Part is in course of preparation) ,25 kV a c 01 : Part CAUTION: Although this standard does not include requirements for personal safety, attention is drawn to the need for all concerned t o comply with relevant local statutory requirements regarding the health and safety of all persons in all places of work including those covered by this standard (Attention is drawn to the fact that electrical potentials in excess of V a c or 120 V d c may be dangerous to personnel) 1.2 Definitions For the purposes of this Standard the following definitions apply 1.2.1 bonding: The connecting together of elements by means of a conductor 1.2.2 earth bonding point: A dedicated point to which a wrist band cord or similar component can be connected 1.2.3 electrostatic discharge (ES D): A trans fer of electrostatic charge between bodies at different electrostatic potentials caused by direct contact or induced by an electrostatic field 1.2.4 electrostatic discharge sensitive device (ESDS) : A discrete device, integrated circuit or assembly that may be damaged by electric fields or electrostatic discharge encountered in routine handling, testing and transit NOTE: Damage includes any degradation or malfunctioning of the device performance 1.2.5 ESD earth facility: A common facility to which bonded elements i n the ESD protected area are connected 1.2.6 ESD protected area ( E P A ) : An area in which ESDS can be handled with minimum risk of damage as a result of electrostatic discharge or fields, and in which the operator is not exposed to additional risk CECC O0 01 Issue BSI BS*CECC 00015: *PT*L 91 m Lb24669 7 93 ESDS ESDS voltage sensitivity: The maximum voltage at which the does not suffer any ESD damage NOTE: of the Where no sensitivity information is available, the sensitivity ESDS is considered to be < 0 volts ESDS ESDS on voltage sensitivity of an assembly: The most sensitive an assembly will determine the assembly' s sensitivity field work: Handling ESDS within a temporary permanently controlled boundaries EPA with NOTE: I t includes installation, commissioning, site inspections, servicing and maintenance of ESDS together with packaging and unpackaging activities associated with these functions 10 garment: A coat , j acket, smock, hood, trousers, overall or cap is regarded as a garment for the purpose of this standard 11 ground: The uniform potential established i n the work area which ensures that the potential of the device and of everything with which it is likely to come into contact is the same 12 ground cord: An electrical connection between the earth bonding point and the ESD earth facility 13 device hazardous voltage: 14 materials Any voltage capable of damaging an ESDS 1) antistatic material: Materials exhibiting properties which minimize charge generation when rubbed against or seperated from the same or other niaterials 2) materials with resistivity properties: NOTE: a) For test conditions see annex A electrostatic shielding materials Materials which are capable of attenuating an electrostatic field and have one layer of surface resistivity less than x 10' ohm/sq, or volume resistivity less than x l o ohm x cm per mm of material thickness CECC O0 01 Issue m 12 A check shall be made that the electrostatic fields are not greater than that specified in A check shall be made that humidity control when provided is in accordance with 13 A check shall be made that ionization control when provided is in accordance with 14 15 A check shall be made that tools comply with k 16 A check shall be made that the design controls in been applied 17 A in have check shall be made that the product selection procedures have been applied A check shall be made that the procurement records in have been maintained 19 An audit report for circulation shall be completed, see tables and for guidance The audit report shall include identification of any non-compliance with this standard, and it shall give recommendations for corrective actions relating to these non-compliances and any other risks noted 20 A follow-up audit shall be undertaken to check the effectiveness of any corrective actions arising from these recommendations (9 19) and the related report shall be completed and circulated 45 CECC O0 015 Issue BSI BSUCECC 0001 5: *P T*1 91 Lb2 6 3 O M Annex A Te s t procedures The following test procedures are included for information Test requirements within this standard may use appropriate tests listed or relevant alternatives A l S urface resistivity and resistance to A.l.P ground General apparatus A means of measuring resistance i n ohms over the range of x l o to x l o or i n certain applications x l o ’ * at a nominal 0 V d c for some lower resistance applications V d c probes or electrodes in A 2 or together with appropriate and A is required for most measurements Surface resistivity A Where General surface resistivity requirements are specified, measurements surface resistivity shall be made using one of the following methods as appropriate: - b) I S 28 78 I E C 93 c) method described i n a) A Special procedures are required for the measurement of the surface resistivity of floors and bags Some materials, resistivities particularly many with higher surface or volume i n the electrostatic dissipative range, are unable t o maintain a constant resistivity under different voltages, humi di t i es , long term life, and other conditions relative Where this could apply materials may additionally be procured with decay characteristics a charging voltage of 0 volts that decays t o not more than less t han t wo s econds , see A surface resistivity > x 10” of > x A 2 50 volts in I n all cases where the material has a ohm/cq or volume resistivity l o ohm x cm this charge decay characteristic is mandatory P robe The probe t o be used shall consist of two non-corrosive metal electrodes made of, fo r exampl e, gold plated brass or stainless steel, The electrodes shall be of equal face of an insulating rigid plate be see note lehgth and they shall be attached t o one The long axes of the electrodes shall parallel with the face and with one anot her, The distance between their long axes shall be equal t o their individual length 46 CECC O0 01 Issue M B S I B SKECC 00035: *PT*1 91 W 62 669 ~~ ~~ ~~ ~ m mm t mm and stand a minimum of mm off the plate I n choosing the length, account shall be taken of the Each electrode shall have a width of smallest area t o be measured, s ee not e Flexible leads shall be connected to the electrodes and have their free ends suitably terminated for connection to a meter Vhen the probe is o n a face plate, it shall not be capable of being rocked about either diagonal of the square plate A weight shall be attached to the top surface of the probe of sufficient siz e to increase the combined mass of the probe and weight to 2, kg f , kg NOTE : Aluminium is not a suitable material; NOTE : A 65 m m length is suitable for most applications Measuring procedure Mark out measuring sites within t he boundary, s ee note below Place the probe o n the surface of the first site with the probe electrode parallel to the long edge of the surface and take a resistance reading If the reading fluctuates, t hen the lowest resistance value over a 15 s period shall be taken Rotate the probe through 90' and take a second reading Repeat the procedure for all sites Readings i n both planes should be within the specified values NOTE : The number and spacing of sites taken should be such as to give confidence i n the area sites per square metre, site per square metre, every and For working surfaces between and flooring within m of working surfaces and other flooring areas site between square metres Kill normally be satisfactory Seating and garment material should have sites chosen appropriate to the product NOTE : O n certain materials a totally flat surface may not be available When this applies a resilient conducting material should be used under each electrode t o ensure that good electrical contact is made over the full area of the electrode A Resistance to ground A General NOTE: Under some condi t i ons , this measurement may be made i n t wo and from the EGP to the earth part s ; from the site to the EGP , facility terminal, see fig Where this applies, individual measurements shall comply with the figures in table 47 i CECC O0 O15 Issue BSI BS*CECC 0 5: * P T* L 91 m Lb24bb9 0271835 Probe The probe to be used shall consist of an electrode of non-corrosive metal made of, for example, gold plated brass or stainless steel, with a smooth base surface 75 mm diameter, see note The mass of the probe shall be 2, kg 0, kg The electrode shall be connected by flexible leads to a terminal which shall be suitable for connecting to a meter NOTE: Aluminium is no t ‘ a suitable material Measurement procedure 8.1.3.3 Measure the resistance at the sites as specified in A 3, note If the value is fluctuating, then the lowest value over a 15 s period shall be taken Measurement procedure for wrist/cord and footwear Measure the resistance between the operator’ s hand and ground using suitable equipment The equipment should be labelled with its function and have an audio and/or visual indication of resistance value obtained Acceptance values of resistance are given in the table below w Wrist band/cord e ‘ Hand to Off line or continuous Note remote end of cord or ESD Earth facility > 7, s < 3; Note io5 ohm x l o ohm + ESD footwear Plate type Kote 2, Ground type Note 2, Plate ESD Earth > o ohm < 3, x lo’ ohm Facility > 7, x l o ohm Note < 3, x 1070hm NOTE 1: Where exposed, energized conductors in excess of 250 V a c (500 V d c ) are envisaged (4 2) , an additional resistance of 7, x l o ohm for each additional 250 V a c (500 V d c ) should be included Maximum resistance values are unchanged NOTE 2: A suitable non-corrosive metal, (not aluminium) , or other material with a resistance of less than x l o ohm, hand plate should be touched to complete the circuit and give a reading when the wrist band/cord or conductive footwear is worn NOTE 3: A suitable non-corrosive metal, (not aluminium) , or other material with a resistance of less than x l o ohm, footplate of minimum size 300 mm x 300 mm should form part of the equipment The wearer should stand with both feet on this footplate 48 CECC O0 015 Issue m B S I B Si CECC 0 , : * P T* L 91 , m Lb24bb9 027L83b - b - NOTE : Ground style ESD footwear testers should only be used when the floor resistance to ground is < x l o ohm NOTE 5: The visual and/or audio signal should indicate conformance to the specified value indication A Charge decay Where a charge decay is specified, unless otherwise stated, it shall have decay characteristics of 1000 V to V in a maximum of two seconds NOTE: These procedures should only be used t o evaluate electrostatic dissipative materials These not include electrostatic conductive materials or materials that are laminated, plated or metallised with conductive materials or certain conductive layers A Measurement A of antistatic properties Measurement procedure for general packaging materials suitable apparatus is shown in figure Al Place a 14 pin dual-in-line plastic encapsulated package (or a device similiar to that requiring protection) in the conductive clamping system which is mounted in the pivot arm attached to the apparatus base The device should be held in an inverted orientation and the clamp should make contact only with the non-conductive portion of the package A Clamp the test material in the grounded carriage Apply a constant downward force system 0, 25 of N I , O l N onto the clamping Move the carriage back and forth over a distance of 100 nun at a rate of (100 k 5) cycles per minute for 20 cycles Drop the device into a faraday pail and record its generated charge Neutralize the material under test with ionized air to reduce its residual charge to < I 0, Ol I nanocoulombs Replace the device in the clamp Repeat the complete test ten times XOTE: The charge should be expressed in nanocoulombs/cm2 and this result can be used to calculate the maximum allowable value with reference to the threshold voltage of the device requiring protection A Measurement procedure for magazines Place a device similiar to that requiring protection into the magazine using tweezers Insert stops at both ends of the magazine 49 CECC O0 O1 Issue y B S I BS*CECC 00015: *PT*L 91 = i ) bbq 38 37 Rotate the magazine through 90' from 45' above the horizontal to 45' below the horizontal, allowing the device to slide from one end stop t o the other After six rot at i ons , remove one endstop and allow the device to drop into a faraday pail Record the charge generated on the device Neutralize the magazine Kith ionized air to reduce its residual charge t o I 0, Ol I nanocoulombs < Replace the device in the magazine Ten complete tests should be performed NOTE: The charge should be expressed in nanocoulombs/cm2 and this result can be used to calculate the maximum allowable value with reference t o the threshold voltage of the device requiring protecticn A.4 Additional tests NOTE: Additional tests supplier and procurer this section should be appropriate ski1l s and A may be carried out by mutual agreement of the It should be emphasized that the tests i n only carried out by personnel with the the results interpreted by experts Electrostatic shielding A 1 General The following test cah be used to evaluate the relative performance of electrostatic shielding products The recommended test voltage is 1000 V however other voltages may be used at the user' s discretion In selecting the t es t voltage, the user should be aware of the voltage breakdown limitations of the material under test and of the components of the test system A.4.1.2 Method Place a parallel plate capacitive sensor, a s shown in fig A , with conductive plates mm diameter i n the shielded container The spacer between plates should be made of , mm 2, 54 mm thick insulating mat eri al , such as polycarbonate or acrylic With the container on a ground plane, place a metallic electrode sufficiently large on the outside of the container to cover the top plate of the capacitive sensor placed inside the container Using 'a suitable oscilloscope and probes attached to the conductive plates of the capaciti1re sensor, make a differential voltage sensor when the outside of the test s peci men above the capacitive sensor is charged by an electronic circuit which' simulates human cont act The simulator should be as shown in fi g, A 22, '23 50 CECC O0 015 Issue W B S I BS s CE CC 00015: *PT*L 91 W Lb24bb9 0273838 T W ~~ Containers having a surface resistance to ground exceeding 10 megohms should be discharged between pulses Residual charge can remain on or near the contact plate when the relay returns t o its normally open condition Such charge will reduce the observed pulse amplitude The contact plate should be grounded for at least five seconds j ust before each simulated discharge is applied t o the container The resistance t o ground via the container can be measured with an ohmeter connector between the contact plate and ground plate Since shielding is a function of the resistance around the container, pulse amplitude will be dependent on where i n the bag or container the sensor is placed, especially i n large bags or containers Therefore, the centre of the conductive plate of the sensor should be 50, 2 , mm inside a bag' s open end, centred laterally, mm NOTE: The oscilloscope and differential amplifiers should have a band-width of at least 50 MHz The probes should be of high impedance (at least 10 megohms) and low capacitance (5pF or less) The probes and amplifier should be carefully matched and balanced s o that a common input pulse produced little or no signal Two single pole - single throw (SPST) relays or one double pole - single throw (DPST) should be used Bounceless and non-arcing relays are required A Measurement of relative humidity The measuring instrument shall be a direct reading hygrometer calibrated in relative humidity percent, and having an accuracy of better than over the range ( to 80 ) Y, i h It shall be mounted within the EPA not more than metre above the level where ESDS are handled Where more than one EPA is contained i n a single area which has the same environment, t hen a single hygrometer may be used to monitor the whole area X NOTE: with A suitable type of instrument is a precision hair hygrometer degree scale 0 mm diameter 85 CECC O0 01 Issue B S I BS*CECC 00035: *PT*3 93 3bZi 669 OZ73839 Devi ce I Base Carr ¡ age Figure A l: Charge measuring 52 equipment CE CC O0 015 I s s ue B S I BS*CECC 0 93 : * P T* L i1 62 669 B P I 22, 23 rL 12 ' I >p /o rbe connectors 52 thick conduc tive pl ates Fi gure 8.2: Capacitive sensor High voltage \ 0 ~~~ i vo/arm I / \ Grounded m etal pi ate Figure A.3: El ect rode shielding test apparatus 53 CECC O0 015 I s s ue BS I BS*CECC 00035: *PT*l 3b24bb9 0273843 T o d n a, al : E E n L d r x n r O ES l n d l d x x x zo b4 S o On; m O E E s L) k O E E E S S O o n O0 * - d r l E A O c '0- O N E L o & G I c, n I -rl rl A h h r l A V V A V V U X A rl X emvi mm o A V V U V O X v i n a, pi A d d x x a ! I- n O I vixxz s E O O n O O X % A V " ! c, O O w E 5 E U x x t t B X X E E u c ) ) d o - E x O 0 r l d d d d d x x x x x x d d A V O ) O b A V O r dl -4 A V pi U a a, rl n l A d d d V V Q d a z al -2 a E a v) \ \ E- E n o j > r O c, e % O (d x r n v ) f c, O e E c, v) m \ % E v a, E d l m E O& d o j r O m O l d N d r x l C - E % % o O O d rl r X x (d n c, x x x x d d d d b r rl d v) V A V V V E A A V v n i (d a, O & n n l-i rl W E a, n n l-i i! O0 n O rl V a rl w v) a z ! u 54 CECC O0 01 Issue D I - m u E a 0-2 L e m o - m C L al ci m E m -m K (0 Y u m n - m v o ci a- ) *- o a l m E o al - *s al L O n m al L m a l - ci x v ) m * u O*-@ m o u m - - c K m m E u c E O rn C U C C m > ci v) C al ci m E m C r U I a u m n a - ci E X O -n L - v) L ci al K O C ci al v) c ci -3 -cio K K S -7 K O u - K - E a > O v) E æ O a v) v) a L v> d L- c c c al - L - c *C U K U oc P ci ual al so = u =z o- m o o r o O c - c L r -ci al ?N U 0- O ci o n o w m o - O N N U or w o r - Z al o m c L O o fi al c LCI al a e n c m u u cr m m O E -m P L 0) ci a c u cr L a v) C u -ci E S I n - n n m a v) al - -n - $ m I al ci m m al n C m C m Y c U m v) n > L m a Q, QI Q, m E al O c c c al c ci U ci U al v) S vi C al O r A O C ci L m n O a c > c ( C -ci C al a m m > O ci -ci v) L v) a I o W r U c) r al v) c I- C al al v) U +3 (0 E o m n ocici o r c o O r- a z al U al L m P W U a c r C O al n n K æ v) v) v) h o\ o, c> o = o\ o\ o\ r- O Qi I m O O O O O O VI =r r- 55 a al L m m C m r L c L c o al u) n € a L O Z U Q- u) al E a a- C Q- a c a C E n W E a m m al E al v)v> E: c m ala æ + a al L al L al U U al v) L r a n v: v) L al C al C al U ci C al E c '0 u) ci o al > t K W al C C U ci r a C O v) U E C m O r- ci L n m U al > K C C U al a > v) c v) - al m m U c C - a C C E L o m i ù n al O U C i F c L r al a i a ci fC F1 ? U L v) Q- E L a U al O C L ci U C 0 U C O m L n ci v) ci ci v) I- \o W W W I- I- I- I- I- 52 z O al n c P C v) v) ci C o> E al L a v) al E a ci r > C W v) C v) al L al E a > O U C m al o v> C C z m ci U W O C al Y W z m Q- C W D ci L r- rn al C U m - +I C ci K rn al L c I U al ci L M C v) - f U al L v) O N v) z.2 - L al n r( > s v) O U L - al * - (J n o L a m ci L al -ci n m C a u CT n al al ci U al L a K ci ci L a n O ci C C E Y L v) G- C r L U r ) c i ci-o '- G-c '- N.4 r o *- C - v ) K c i C Y -4 e& o C o Y w m n W v) O? wv) -ci m ci N n I - -4= o ci O Oc> - 0) K c C r- L U m v) al C E U o O? U ỵK ow In w c i m - K O m a m -IA v) m I- -ci U u c f n v) (PI -.c nn c a m al al A o c i L al U 0, W 22 al c m o m K m ci C v) o O a n m m -cEic u c m C ci O -ci> -m -ci m - 0m U al u) ci C al Y 0- ~ - mx K > C r- v) C m u a Y r- al o x - L - l -n al al U L o)m m K U V O In c i v) P K al> ln ci O L U - z c a al U a l U U* al u a - s- v) r- x al - c m O c ci m v) a U al v) e al - v) h C c ci *U m m *m U u K L a m O ci I c i m c K m C Q - a l m '- E m -L - v) - al ci C L E c al > m m m- u e- a o cci o al cic m m -U L m u m n K U VI n c m a l L- c cc m a c v) o m a l u C E C z O a a n W CECC O0 01 Issue ES1 BS*CECC 91 00 5: *P T* m Lb24bbỵ 0271843 m Table 3: Suggested format for report (front sheet) Report on audit of electrostatic protection facilities Report No Previous report No Location Date audit Next audit due Operation Date of General Protective procedures and practices for ESDS and equipment a s required by CECC O0 015: Part were audited by Authority Sunmiary of audit Status codes Satisfactory Unsatisfactory Critical Major Minor S Not applicable r Electrostatic precautions audit check list a) Identification of EPA b) Floor d) Wristband, cords , earth leads and usage e) Storage f) Component/sub-assembly trays boxes and packaging h) work surface rounding fSD ground terminal seating Transport i) Emissions of electrostatic fields j) (Where supplied) k) Clothing i) m) Production aids/fixtures Production and test/inspection machinery and equipment n) Housekeeping o) Training records p) tools q) design controls r) product selection s) Status Rec number ? c) Wristband/heelgrounder tester and records ) N/ A Drocurement records CECC O0 015 Issue Table 4: Suggested format for report (continuation sheets) Report No Page No Rec No CECC O0 015 P art Clause Recommendations Recommendations completed Date Initials Publication(s) referred to S ee national fo rew o rd 57 CECC O0 015 I ssue B S I BS* CECC F 00 5: *P T* 93 m ~~ 3624bb9 0273845 BS CECC 00015 : M1:1991 BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Chaiter Contract requirements British Standard does not purport to include all the necessaiy provisions of a contract Users of British Standards are responsible for their correct application A Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions Any person who finds an inaccuracy or ambiguity while using this British Standard should notify BSI without delay so that the matter may be investigated swiftly BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying British Standards Orders for all Biitish Standard publications should be addressed to the Sales Department at Milton Keynes Information on standards BSI provides a wide range of information on national, European and international standards through its Library, the Standardline Database, the BSI Infoimation Technology Service (BITS) and its %chnical Help to Exporters Service Contact Customer Infoimation at Milton Keynes: Tel: O908 221166 Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact the Manager, Membership Development at Milton Keynes: %l: O908 220022, Copyright Copyright subsists in all BSI publications No part of this publication may be reproduced in any form without the prior permission in writing of BSI This does not preclude the free use, in the course of implementing the standard, of details such as symbols and size, type OP grade designations Enquiries about copyright should be made to the Copyright Manager, Marketing at Milton Keynes BSI Park Street London W1A 2BS BSI M o r d Wood Milton Keynes MK14 6LE 91 2- 9- 0.5k- B ECU23 m