Patent ID: 6346763
Filing Date: 2002-02-12
Classification: H01L

Abstract:
A high output stacked piezoelectric transformer comprising;a first piezoelectric element (21a); a first input electrode (INE1) formed upon said first piezoelectric element (21a); a first output electrode (OUTE1) electrically isolated from said first input electrode (INE1), and formed on a same plane as that of said first input electrode (INE1); a ground electrode (GE) formed on a bottom of said first piezoelectric element (21a); a second piezoelectric element (21b) formed under said first piezoelectric element (21a) across said ground electrode (GE); a second input electrode (INE2) formed on a bottom of said second piezoelectric element (21b) oppositely to said first input electrode (INE1); a second output electrode (OUTE2) electrically isolated from said second input electrode (INE2) and formed on a same plane as that of said second input electrode (INE2), wherein each of said first and second output electrodes (OUTE1) and (OUTE2) has a circular shape, and is disposed at a center of each of said first and second piezoelectric elements (21a) and (21b); and each of said first and second input electrodes (INE1) and (INE2) is formed around each of said first and second output electrodes (OUTE1) and (OUTE2) electrically isolated from each of them by an open region (OP).