Resources Contact Us Home
Surface acoustic wave device, module device, oscillation circuit, and method for manufacturing surface acoustic wave device

Image Number 13 for United States Patent #8018122.

An SH wave type surface acoustic wave device includes a piezoelectric substrate and an IDT electrode provided on the piezoelectric substrate and constituted of Al or an alloy mainly containing Al and that uses a SH wave as an excitation wave. The piezoelectric substrate is a crystal plate in which a cut angle .theta. of a rotary Y cut quartz substrate is set in a range of<.theta.< in a counter-clockwise direction from a crystal axis Z and in which a surface acoustic wave propagation direction is set at with respect to a crystal axis X. An electrode film thickness H/.lamda. standardized by a wavelength of the IDT electrode is 0.04<H/.lamda.<0.12, where .lamda. is a wavelength of the surface acoustic wave to be excited, and a main surface of the piezoelectric substrate is etched by a thickness of 0.002 .mu.m or more.

  Recently Added Patents
Dual mode operation in a wireless network
Flexible pipe for conveying hydrocarbons and having a reinforced maintain layer
Method and apparatus for harvesting cartilage for treatment of a cartilage defect
Magnetic domain control for an embedded contact sensor for a magnetic recording head
Adhesive height setting
Interactive electronic bill payment system
  Randomly Featured Patents
Polypropylene film and multilayered polypropylene film
Diazepine derivatives and their use
Control circuit arrangement for DC motors
Articulated boom and head for manipulating objects under water
Method of fabricating a narrow polycide gate structure on an ultra-thin gate insulator layer
LDMOS transistor device, integrated circuit, and fabrication method thereof
Softening point measuring apparatus and thermal conductivity measuring apparatus
Hood latch
Method of manufacturing a battery electrode
Image display apparatus