Patent ID: 9574933
Date: 2017-02-21
CPC Classifications: G01J,G01N,G02F

Claim:
1. A method of manufacturing a terahertz-wave detection element capable of detecting a spatial intensity distribution that an incident terahertz wave has, the method comprising: an oxide formation step of forming an oxide layer on one main surface of a first substrate consisting of an electro-optic crystal in which a refractive index at an incident position of a terahertz wave changes in accordance with incident intensity of said terahertz wave at the incident position; a joining step of joining said one main surface of said first substrate and a second substrate that supports said electro-optic crystal layer, by an adhesive consisting of a thermosetting resin; a polishing step of thinning said first substrate of a joined body obtained by said joining step, to a thickness from 1 μm or more to 30 μm or less by polishing said first substrate; a segmentation step of obtaining a large number of terahertz-wave detection elements by cutting said joined body into pieces of a predetermined element size, wherein in said oxide formation step, said oxide layer is formed such that said first substrate becomes convex to a side of said one main surface by causing a tensile stress to act on said first substrate; a total-reflection layer formation step of forming a total reflection layer consisting of a first dielectric multilayer film on a surface of said electro-optic crystal of said joined body after said polishing step; and a reflection-prevention layer formation step of forming a reflection prevention layer consisting of a second dielectric multilayer film on a surface of said second substrate of said joined body after said polishing step.