laser sintering of thick film conductors for microelectronic applications

... Laser sintering of thick- film conductors for microelectronic applications Edward C. Kinzel School of Mechanical Engineering, Purdue University, West ... the ink- substrate interface for 2.0 W of laser power. FIG. 11. Transient temperature for a laser power of 2.0 W and scan speeds of ͑a͒ 0.10 m/s and ͑b͒ 0.40 m/s for several different depths. 063106-7 ... this...

Ngày tải lên: 06/05/2014, 08:54

... three-dimensional part. Laser sintering can also be used for thick- film pastes. Kinzel et al. 9 demonstrated that a continuous laser can be used to sinter thick- film silver pastes to fabricate thick- film microelectronics ... counterparts is the absence of an oxide surface. Because of the formation of an oxide layer on metallic electrodes, their performance diminishes over tim...

Ngày tải lên: 06/05/2014, 08:54

... growth of the sensing films during the heat treat- ment process. Therefore, in this study, WO 3 doped rutile TiO 2 was used as the material of the sensing film to reduce the grain growth of the ... 1.5 l m thick sensing film was heat treated at 1100 °C for 1.5 h in dry air condition to define a porous shaped sensing film and enhance the thermal stability of the sensor. The surface topo...

Ngày tải lên: 19/03/2014, 16:48

... thickness of lamellae was seen as it increased. Table 1 shows specific surface area for each sample. By addition of a small amount of SnO 2 nano-particles, it is found that the sintering of ... Figure 1 shows FE-SEM images of the surface for thick films of WO 3 (a), WO 3 -SnO 2 (1:0.01) (b) and WO 3 -SnO 2 (1:0.1) (c) calcined at 300°C. The morphology of the lame...

Ngày tải lên: 20/03/2014, 13:04

... Measurement of film thickness Table 1 shows the measured thickness of the WO 3 thin films. Two basic tendencies in the thickness as a function of Table 1 Thickness (nm) ofthe WO 3 thin film asa function of ... of the film surface. Table 3 Sensor sensitivity (S) in the presence of 10 ppm of ethanol as a function of the working temperature and number of interruptions of the depo...

Ngày tải lên: 20/03/2014, 13:05

... designed for producing fine lines down to 75 µm using screen-printing. QS300 has a specified sheet resistance of 4.5 mΩ/square for a fired film thickness of 10 µm at 850°C. The rheology of screen ... Fig. 4. Ratio of maximum displacement to base radius as a function of laser fluence. Because of the thixotropy of the ink, there will be effective plastic deforma...

Ngày tải lên: 06/05/2014, 08:53

... along the direction of laser propagation, they form an electronic field which exerts an extra force on ions. This extra force can be estimated by adding up the electrostatic force vectors from ... 2008 Abstract Ultrafast laser ablation of fused silica is studied using molecular dynamics simulations. Ionization and gen- eration of free electrons, absorption of the laser energy by...

Ngày tải lên: 06/05/2014, 08:54

... Temporal profile of optical transmission probe for pulsed -laser heating of amorphous silicon films Hee K. Park, Xianfan Xu, and Costas P. Grigoropoulos Department of Mechanical Engineering, ... at 10 A/s. The uniformity of the thickness of the a-Si layer is monitored by surface profilometry. The sample is irradiated by a KrF (il=O.248 ,um) excimer laser beam. The laser...

Ngày tải lên: 06/05/2014, 08:54

... chloride was suspended in 50 ml chloroform, cooled to 0°C and a mixture of 2.2 mmol dansyl derivative [19] and 2 mmol N-ethyl-diisoproylamine in 20 ml chloroform were slowly added by a dripping ... intracellular contrast agents (CA) dedicated for imaging of cellular metabolic processes, combined with image-guided therapeutic approaches. For the development of modern drugs, a...

Ngày tải lên: 25/10/2012, 11:00

... change of viewpoint, of perspective and very often of category of thought” (Vinay and Darbelnet). This is considered the touchstone of a good translator. 8. Compensation: when loss of meaning ... statement of function of the ST is made, including the ideational and interpersonal component of that function. 4. A similar profile and statement of function is made of the...

Ngày tải lên: 07/11/2012, 14:36