Patent ID: 8648304
Filing Date: 2014-02-11
Classification: G01J,G08B,H01L,Y10T

Abstract:
1. A thermal detector manufacturing method comprising: forming a structure including an insulating layer on a surface of a substrate; forming a sacrificial layer on the structure including the insulating layer; forming a support member on the sacrificial layer; forming on the support member a heat-detecting element having a structure in which a pyroelectric material layer is disposed between a lower electrode and an upper electrode, 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 arriving light is reflected; forming a first light-absorbing layer so as to cover the heat-detecting element, and planarizing the first light-absorbing layer; forming a contact hole in a portion of the first light-absorbing layer, subsequently forming a material layer which is thermally conductive and optically transmissive at least with respect to light of a prescribed wavelength, and patterning the material layer to form a thermal transfer member having a connecting portion that connects to the heat-detecting element and a thermal collecting portion having a surface area greater than that of the connecting portion as seen in plan view; forming a second light-absorbing layer on the first light-absorbing layer; patterning the first light-absorbing layer and the second light-absorbing layer; patterning the support member; and removing the sacrificial layer to form a cavity between the support member and the structure including the insulating layer formed on the surface of the substrate.