Patent ID: 9443993
Filing Date: 2016-09-13
CPC Classification: A61B,H01L

Claim Text:
1. A method for manufacturing a spectroscopic sensor comprising: (a) forming a light receiving element on a semiconductor substrate; (b) forming an angle restricting filter on the semiconductor substrate after the step (a), the angle restricting filter including a light blocking portion and a first opening and a second opening that are adjacent to each other with the light blocking portion interposed therebetween in plan view of the semiconductor substrate; (c) forming a spectroscopic filter on the angle restricting filter after the step (b), the spectroscopic filter including a first filter unit comprising a plurality of light transmitting films that has a first thickness and is located at a position that overlaps the first opening and none of the plurality of light transmitting films of the first filter unit overlap the second opening in plan view of the semiconductor substrate and a second filter unit comprising a plurality of light transmitting films that has a second thickness different from the first thickness and is located at a position that overlaps the second opening and none of the plurality of light transmitting films of the second filter unit overlap the first opening in plan view of the semiconductor substrate; and forming the plurality of light transmitting films of the first filter unit such that the plurality of light transmitting film of the first filter unit is spaced apart from the plurality of light transmitting films of the second filter unit in a direction extending along a surface of the angle restricting filter, wherein: the step (c) includes: