Patent ID: 8642963
Filing Date: 2014-02-04
Classification: G01J,G08B,H01L,Y10T

Abstract:
1. A thermal detector comprising: a substrate; a support member supported on the substrate so that a cavity is formed between the substrate and the support member; a heat-detecting element formed on the support member and having a structure in which a pyroelectric material layer is disposed between a lower electrode and an upper electrode; a light-absorbing layer formed on the heat-detecting element; and a thermal transfer member including a connecting portion connected to the heat-detecting element and a thermal collecting portion disposed inside the light-absorbing layer and having a surface area larger than a surface area of the connecting portion as seen in plan view, the thermal collecting portion being optically transmissive at least with respect to light of a prescribed wavelength, the lower electrode having an extending portion extending around the pyroelectric material layer as seen in plan view, and the extending portion having light-reflecting properties by which at least a part of the light transmitted through the thermal collecting portion of the thermal transfer member is reflected.