Patent ID: 7282388
Filing Date: 2007-10-16
Classification: B81B,B81C,H01L,H03H

Abstract:
1. A method for manufacturing a wafer level package type FBAR device, the FBAR device having a substrate formed with plural external electrodes, comprising the steps of: a) forming plural device functional portions on a first wafer at certain distances; b) forming plural external electrodes between the adjacent device functional portions on the first wafer so as to be electrically connected with the adjacent device functional portions, each having a certain transversal length on the basis of a center point between the adjacent device functional portions; c) forming plural cavities at certain distances on a second wafer so as to correspond to the device functional portions of the first wafer, respectively; d) forming plural vertical perforations on the second wafer, each having a certain transverse length on the basis of a center point between the adjacent cavities; e) bonding an upper surface of the first wafer to a lower surface of the second wafer so that the plural cavities vertically face against the plural device functional portions, respectively, and the plural perforations vertically face against the plural external electrodes, respectively; and f) cutting the first and second wafers bonded to each other along center axes of the perforations.