Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1998-03-30
2000-03-14
Enad, Elvin
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
333194, 333195, H01L 4104, H03H 900
Patent
active
060377003
ABSTRACT:
A surface acoustic wave device including, as formed on a piezoelectric substrate, one or a plurality of resonators connected together, each of the resonators comprising an interdigital transducer and a grating reflector, the object of the invention is to compact the device by improving the reflection efficiency of the grating reflector. When the grating reflector is a metal strip array reflector of the open type, the grating reflector has an electrode occupancy ratio of 0.7 to 0.8. Alternatively, when a metal strip array reflector of the short-circuit type is used, the grating reflector has an electrode occupancy ratio of 0.45 to 0.55, or when a metal strip array reflector of the interdigital type is used, the grating reflector has an electrode occupancy ratio of 0.7 to 0.85.
REFERENCES:
patent: 4635009 (1987-01-01), Ebata
patent: 4760359 (1988-07-01), Shiba et al.
patent: 4837476 (1989-06-01), Mochizuki
patent: 4978879 (1990-12-01), Satoh et al.
patent: 5212420 (1993-05-01), Hickernell et al.
patent: 5270606 (1993-12-01), Cho et al.
patent: 5313177 (1994-05-01), Hickernell et al.
patent: 5625329 (1997-04-01), Koike
patent: 5631515 (1997-05-01), Mineyoshi et al.
patent: 5638036 (1997-06-01), Penunuri et al.
patent: 5731748 (1998-03-01), Tada
patent: 5760664 (1998-06-01), Allen
patent: 5874869 (1999-02-01), Ueda et al.
Ikeda Masami
Kameoka Fumio
Niki Kazuya
Tanaka Naoki
Enad Elvin
Medley Peter
Sanyo Electric Co,. Ltd.
LandOfFree
Surface acoustic wave device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface acoustic wave device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-172334