Tunable ferroelectric thin film devices for microwave applications

... microwave tunable devices based on ferroelectric thin films Barium strontium titanate (BaxSr1−xTiO3 or BST) thin films are currently considered to be the most suitable candidate for tunable microwave ... 1.3 Ferroelectric materials and their microwave applications 1.3.1 Theory of dielectric response of ferroelectric materials 1.3.2 Tunable ferroelectric thin f...

Ngày tải lên: 10/09/2015, 08:40

... results of dielectric properties of these two varactors and thin films prove the feasibility of application of Bi1.5 Zn1.0 Nb1.5 O7 thin film into microwave tunable devices vii List of Figures ... 29 Lift-off method for fabrication of patterned Ba 0.5 Sr0.5TiO thin films…………………………………………………………… 29 2.3.1 Chapter3 Fabrication of patterned Ba 0.5 Sr0.5TiO thin...

Ngày tải lên: 04/10/2015, 10:26

... region (a) Schematically illustration of multi-bit storage operation for embossed regions on a PZT film (b) Remnant polarization ratio of the embossed and the un-embossed regions in a PZT film ... http://www.nanoscalereslett.com/content/6/1/474 characterizations The same measurements were also performed on un-patterned regions for comparison Results and discussion Figure 1a il...

Ngày tải lên: 21/06/2014, 01:20

... effect in photovoltaics of ferroelectric thin films 132 8.1.2 Thickness effect in photovoltaics of ferroelectric thin films 132 8.1.3 Screening effect in photovoltaics of ferroelectric thin ... a lack 18 of understanding and systematic characterisation for photovoltaic outputs in ferroelectric thin films (including polycrystalline and epitaxial thin fil...

Ngày tải lên: 14/09/2015, 08:42

... could be formed during the process of interruption The prolongation of film growth on the “extra” interface involves a new nucleation of the metal oxide film, the formation and growth of a film ... of the sensors heavily depend on the conditions and methods used in their preparation [27–31] Since grain size is one of the key factors to enhance the gas sensing properties of...

Ngày tải lên: 20/03/2014, 13:05

... along the centerline of the inksubstrate interface for 2.0 W of laser power when the center of the laser is located 90 ␮m from the beginning of scan The figure shows the region of the heated area ... this paper, we investigated the use of laser sintering for the fabrication of thick- film microelectronic components The technique was demonstrated to be capable of p...

Ngày tải lên: 06/05/2014, 08:54

... contrast, for a patterned Si film, the space between the patterned Si film units makes room to expand the volume of Si during the lithiation process and to minimize the stress generated in the Si film ... respectively, and the Si- deposited area ratio of the patterned film is about 83% for the continuous film These results demonstrate that a well -patterned Si...

Ngày tải lên: 20/06/2014, 23:20

... integration into heterojunction silicon wafer solar cells and subsequently the modelling of heterojunction and hybrid heterojunction silicon wafer solar cells that utilize these films Three key ... monocrystalline/multicrystalline solar cells, thin- film solar cells, organic solar cells, tandem cells, concentrator cells and varying choice of mat...

Ngày tải lên: 09/09/2015, 11:15

... behaviors in a Taylor vortex and therefore benefit certain applications like liquid-liquid extraction conducted in Taylor vortex devices Keywords: Taylor vortex, Taylor- Couette bioreactor, particle ... development for almost one century, the Taylor- Couette device is now applied in many practical applications such as reaction, filtration, extraction and bioreactor We i...

Ngày tải lên: 10/09/2015, 09:28

... p-FET performance i In summary, novel devices employing novel strain engineering techniques were studied They show promising potential for augmenting the performance of conventional CMOS transistors ... describe to my daddy, my mummy and my lovely brother, Henry I thank them for their care and love in my entire life, and thank daddy and mummy for the sacrifices they have...

Ngày tải lên: 14/09/2015, 08:37

... PVD Cu 30 Yong Lai Lin Clare 2.5 A study of Si3N4/ Cu/ Ta thin film systems for dual damascene technology Plasma treatment The effect of NH3 plasma pre-treatment on Si3N4 barriers for Cu metallization ... Yong Lai Lin Clare A study of Si3N4/ Cu/ Ta thin film systems for dual damascene technology proportional to the annealing temper...

Ngày tải lên: 26/09/2015, 10:13

... potential of BTS thin films The efforts toward improving the tunable and pyroelectric properties of BTS thin films have demonstrated the appealing prospective applications of BTS thin films in the ... investigating the tunable and pyroelectric properties of the B-site doped BaTiO3, i.e., Ba(Ti1-xSnx)O3 (BTS) thin films The effects of stress and micros...

Ngày tải lên: 10/09/2015, 15:48

... YBa2Cu3O7-δ (YBCO) thin films, ferroelectric Ba0.1Sr0.9TiO3 thin films and their applications in passive microwave devices YBCO, Ba0.1Sr0.9TiO3 and multilayer YBCO/Ba0.1Sr0.9TiO3 thin films were fabricated ... 117 References 119 CHAPTER 6: FERROELECTRIC THIN FILMS AND MULTILAYERS 98 121 6.1 Barium strontium titanate ferroelectric thin films 121 6.2 Ba0.1Sr0....

Ngày tải lên: 16/09/2015, 08:30

... electrodes In the present study a planar structure thin film gas sensor was fabricated with TiO2 as the sensing layer A thin sensitive TiO2 film was deposited by a DC reactive magnetron sputtering ... planar structure thin film gas sensor was fabricated with TiO2 as the sensing layer A thin sensitive TiO2 684 B Karunagaran et al / Materials Characterization 58 (2...

Ngày tải lên: 20/03/2014, 13:11

... Morphology of WO3 thin films Thin films of WO3 could be derived from the WO3 ·2H2 O sol added with PEG (2 wt.%) by one time spin coating and calcination at 300 ◦ C for h Fig shows SEM images of the thin ... films of WO3 for NO2 sensing, Sens Actuators B 95 (2003) 258 Conclusions Biographies An aqueous sol of WO3 ·2H2 O, added with PEG, could be applied successfull...

Ngày tải lên: 20/03/2014, 13:11