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
Device and method for unified codes
Semiconductor memory device, test circuit, and test operation method thereof
Optical modulation element
Tuning peg for a stringed instrument
Hydrating lounge chair
Systems and methods for providing television signals using a network interface device
Method and apparatus for efficiently inserting fills in an integrated circuit layout
  Randomly Featured Patents
Method of determining skin tissue cholesterol
Ultrasonic flaw detector
Stepwise variable zoom lens system
Apparatus and method for measurement of moisture concentration in granular materials
Toilet tank dispenser
Active feedback levelwinding system
Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system
Popcorn maker
System and method for the guidance of a catheter in electrophysiologic interventions
Means for maintaining attached flow of a flowing medium