Patent ID: 7038359
Filing Date: 2006-05-02
Classification: H03H,Y10T

Abstract:
1. An AT-cut crystal substrate for forming piezoelectric resonators, said AT-cut crystal substrate having first and second opposing surfaces, and comprising: first and second primary electrodes disposed roughly on the center of each respective opposing surface of said AT-cut crystal substrate; first and second secondary electrodes formed on each respective opposing surface of said AT-cut crystal substrate in a shape surrounding each of said first and second primary electrodes and are electrically short-circuited; and said first and second said secondary electrodes connected to an electrical ground, wherein input measurement terminals are formed by one of said first and second primary electrodes and a corresponding secondary electrode, and output measurement terminals are formed by another of said first and second primary electrodes and another corresponding secondary electrode, and wherein said input measurement terminals disposed leftward from said center of the AT-cut crystal substrate and said output measurement terminals disposed rightward from said center of the AT-cut crystal substrate.