Patent ID: 7847252
Filing Date: 2010-12-07
Classification: G01J,H01L

Abstract:
1. An infrared image sensor in which a plurality of infrared-detecting elements are arranged in an array form, the infrared-detecting element including: a substrate; a laminated body having a lower electrode, an upper electrode, and a piezoelectric film made of aluminum nitride which is provided between the lower electrode and the upper electrode and in which a c-axis is oriented almost perpendicularly to a film plane; an anchor coupling a part of the laminated body with the substrate and supporting the laminated body with a gap above the substrate; and an amplifier provided on the substrate and connected to at least one of the lower electrode and the upper electrode, wherein the amplifier including: a first transistor; a second transistor; a first terminal for applying voltage to a gate of the second transistor; a second terminal for applying voltage to a source of the second transistor; and a third terminal for getting voltage out of a drain of the first transistor, any one of the upper electrode and the lower electrode being connected to a gate of the first transistor, the other of the upper electrode and the lower electrode being earthed, the drain of the first transistor being connected to a drain of the second transistor and to the third terminal, a source of the first transistor being earthed, the gate of the second transistor being connected to the first terminal, and the source of the second transistor being connected to the second terminal.