US 12,148,771 B2
Photoelectric conversion apparatus and optical detection system
Junji Iwata, Tokyo (JP); and Yoshiyuki Hayashi, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jan. 10, 2022, as Appl. No. 17/571,993.
Claims priority of application No. 2021-008442 (JP), filed on Jan. 22, 2021.
Prior Publication US 2022/0238573 A1, Jul. 28, 2022
Int. Cl. H01L 27/146 (2006.01); B60R 1/20 (2022.01)
CPC H01L 27/14603 (2013.01) [H01L 27/14643 (2013.01); B60R 1/20 (2022.01)] 22 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a layer having a light incident surface and including conversion elements; and
a wiring structure disposed on a surface of the layer on an opposite side to the light incident surface,
wherein each of the conversion elements includes a photodiode,
the photodiode includes a first region of a first conductivity type in which charges having same polarity as signal carriers are majority carriers, a second region of a second conductivity type and a region of the second conductivity type,
a first voltage is supplied to the second region through the region of the second conductivity type,
the wiring structure includes a first wiring, among wirings, positioned closest to the layer to supply the first voltage to the region of the second conductivity type, a plug arranged to connect the first wiring and the region of the second conductivity type, and a second wiring arranged to supply a second voltage to the first region,
the second wiring is disposed to cover the first region of the first conductivity type when viewed in plan view, and
a distance between the second wiring and the layer is shorter than a distance between the first wiring and the layer.