×

Face shear mode quartz crystal resonator

  • US 4,900,971 A
  • Filed: 03/07/1989
  • Issued: 02/13/1990
  • Est. Priority Date: 03/10/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A face shear mode quartz crystal resonator having a vibrational portion and supporting portions incorporated therein by and etching method, characterized in that a flexural portion of said supporting portion is connected with a central portion of a side of said vibrational portion, the width W of said flexural portion connected with said vibrational portion is smaller than 0.67 L (L is the length of said flexural portion), said supporting portions are provided at the edges in the z'"'"'-axis direction of said vibrational portion, said vibrational portion is substantially square, each side of said vibrational portion is from 0.72 mm to 2.02 mm, and said vibrational portion is fixedly supported via both distal end portions of said supporting portions.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×