Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Yukio Yoshino"'
Publikováno v:
健康科学研究 = Studies in The Health Sciences. 4(2):1-12
Publikováno v:
Vacuum. 83:544-547
Moisture durability of ZnO transparent conductive films was achieved with Ga heavy doping by off-axis type rf magnetron sputtering. The resistivity of 10.9 at.% Ga-doped ZnO was 1.3 × 10 −3 Ωcm and changed less than 5% of resistivity over a 9400-
Autor:
Soju Matsumoto, Maya Seki, Yukio Yoshino, Shinichiro Murakami, Ryoichi Nishikawa, Kazuyuki Nakata
Publikováno v:
SAE Technical Paper Series.
Publikováno v:
Vacuum. 80:658-661
We improved both the thickness uniformity and crystallinity of Aluminum nitride (AlN) films deposited by off-axis sputtering. The results in thickness uniformity and X-ray rocking curve full-width at half-maximum (FWHM) of AlN (0 0 0 2) are achieved
Publikováno v:
Vacuum. 80:814-817
We have improved electrical characteristics of a film bulk acoustic wave (BAW) resonator that features the injection of H 2 O gas into a process chamber. The preferred crystallinity of piezoelectric ZnO film was obtained by RF sputtering at a high H
Publikováno v:
Vacuum. 74:689-692
Crystallinity of ZnO thin film for film bulk acoustic wave (BAW) resonator has been successfully improved by using Pt/Al bottom electrode. The lattice mismatch of ZnO c -plane and Pt (1 1 1) plane is as small as 1.4% so that we could obtain good crys
Publikováno v:
Vacuum. 74:567-570
Current–voltage properties along the c -axis of high-resistive Ni-doped zinc oxide (ZnO) thin film were examined. Zinc oxide thin film capacitor with Al/Ti top and bottom electrodes was fabricated on SiO 2 /Si substrate. Current saturation due to a
Publikováno v:
Vacuum. 66:463-466
The effective electromechanical coupling coefficient has been studied for thin film bulk acoustic wave resonators (TBARs) with fundamental frequencies between 200 and 400 MHz. An increase in the effective electromechanical coupling coefficient ( kt T
Publikováno v:
Vacuum. 66:467-472
Two types of piezoelectric bulk acoustic wave resonators have been fabricated at various frequency ranges using zinc oxide (ZnO) piezoelectric thin films with negative temperature coefficient of frequency (TCF) and substrates with positive TCF. One i
Autor:
Junji Kaneko, Hiroshi Shimamori, Yu Yonezawa, Tomotake Sasaki, Manabe Atsushi, Hiroshi Nakao, Yoshiyasu Nakashima, Hosoyama Hisato, Shigeharu Yamashita, Matsui Yoshinobu, Yukio Yoshino, Shun Motizuki
Publikováno v:
2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA).
The purpose of this study is to improve the efficiency of a boost-type power factor correction (PFC) circuit with a digital controller. One of the biggest losses in PFC circuits is the switching loss. Switching loss can be reduced by low boost ratio