发明名称 |
Acoustic mirror materials for acoustic devices |
摘要 |
<p>A reflector stack or acoustic mirror arrangement for an acoustic device is described which may attain the highest possible impedance mismatch between alternating higher and lower impedance reflecting layers of the stack, so as to maximize bandwidth. The arrangement may also reduce manufacturing costs by requiring fewer layers for the device, as compared to conventional acoustic mirrors. The thinner reflecting stack is accordingly fabricated in reduced time to lower cost, by incorporating materials providing a larger acoustic impedance mismatch than those currently obtainable. The bandwidth of the resulting acoustic resonator device may be widened, particularly when a low density material such as aerogel, CVD SiO2 and/or sputter deposited SiO2 is applied as topmost layer in the reflector stack/acoustic mirror arrangement of the device. <IMAGE></p> |
申请公布号 |
EP1158671(A2) |
申请公布日期 |
2001.11.28 |
申请号 |
EP20010610050 |
申请日期 |
2001.05.22 |
申请人 |
AGERE SYSTEMS GUARDIAN CORPORATION |
发明人 |
BARBER, BRADLEY PAUL;HUGGINGS, HAROLD ALEXIS;MILLER, RONAL EUGENE;MURPHY, DONALD WINSLOW;WONG, YIU-HUEN |
分类号 |
H03H9/17;G10K11/20;H04R15/02;(IPC1-7):H03H9/15 |
主分类号 |
H03H9/17 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|