Piezoelectric resonator chip and a method for adjusting its resonant frequency.

摘要

A piezoelectric resonator chip 1 comprising a piezoelectric chip plate 2 and a pair of electrode patterns 3 and 4 formed on opposite surfaces of it has its resonant frequency adjusted by removing part 9 of the electrodes 3 and 4 using a laser beam. The electrode pattern may include an adjuster pattern (Figure 4) comprising a narrow cutting portion 19, 30 and a separation pattern 21, 22 which is connected to the remainder of the electrode pattern 15, 16 by the cutting portion 19, 30.