Patent ID: 9386388
Filing Date: 2016-07-05
CPC Classification: H01L,H03H,H04R,Y10T

Claim Text:
1. A method of manufacturing a stacked thin film piezoelectric filter including a lower thin film piezoelectric resonator, an acoustic coupling layer formed on the lower thin film piezoelectric resonator, and an upper thin film piezoelectric resonator formed on the acoustic coupling layer, the method comprising the steps of: forming the lower thin film piezoelectric resonator on a substrate; measuring and adjusting a frequency of the lower thin film piezoelectric resonator; forming the acoustic coupling layer on the lower thin film piezoelectric resonator where the frequency of the lower thin film piezoelectric resonator has been adjusted; forming the upper thin film piezoelectric resonator on the acoustic coupling layer; and measuring and adjusting a frequency of the stacked thin film piezoelectric filter.