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
Wireless control system for a patient support apparatus
Apparatus for touch screen avionic device
Method and system for establishing security connection between switch equipments
Method of inspecting wafer
Nonvolatile semiconductor memory device
Efficiently emulating computer architecture condition code settings without executing branch instructions
Treatment of celiac disease with IgA
  Randomly Featured Patents
Toilet paper dispenser with scent and sound systems
Method for manufacturing a multi-layered thin film for use as an anode in a lithium secondary battery
Water heater tank arrangement control device and shaft extension therefor and methods of making the same
High performance cermet electrodes
Fluid flow diverter for cell culture vessel
Partition formation using microprocessors in a multiprocessor computer system
Elevator having a drive machine with a rotating traction sheave between multiple motors along the axis of rotation
Planing hull for multi-hull sail boats
Dressing holder