Back to results
US 2016/0240710 A1Published application
Photodetection semiconductor device having light receiving element
AssigneeSii Semiconductor Corporation
InventorTakeshi KOYAMA
Life of this patent
Estimating the term…
Abstract
In order to provide a photodetection semiconductor device including a light receiving element configured to reduce afterimages, a photodiode is formed by a PN junction into a circular shape so that a uniform distance from an end portion of a light receiving element to an electrode serving as a carrier outlet is realized, to thereby enable carriers to be uniformly taken out from all directions.
Claims4
A photodetection semiconductor device including a light receiving element,
- the light receiving element comprising:
- a first conductivity type semiconductor substrate;
- a circular second conductivity type well region formed into the first conductivity type semiconductor substrate from a surface of the first conductivity type semiconductor substrate;
- a photodiode formed between the circular second conductivity type well region and the first conductivity type semiconductor substrate;
- a second conductivity type semiconductor region concentrically formed inside the circular second conductivity type well region;
- and
- an element isolation region for covering a region from around the circular second conductivity type well region to around the second conductivity type semiconductor region.
4 more elements
A photodetection semiconductor device including a light receiving element,
- the light receiving element comprising:
- a first conductivity type semiconductor substrate;
- a photodiode formed by a rectangular second conductivity type semiconductor region coupled to the first conductivity type semiconductor substrate;
- a wiring layer for blocking light formed above the rectangular second conductivity type semiconductor region of the photodiode, and having a circular opening;
- and
- an N-type semiconductor region and an anode electrode both formed concentrically below a center of the circular opening of the wiring layer for blocking light.
3 more elements
Dependencies are inferred from the claim text.