Patent ID: 11923465
Assignee: STMICROELECTRONICS (CROLLES 2) SAS
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A photodiode, comprising:
at least one memory area including:
at least two charge storage regions;
insulated conductive walls including a first insulated conductive wall between two charge storage regions of the at least two charge storage regions, the first insulated conductive wall comprising:
a first portion having a first length that extends along a first direction; and
a second portion aligned with the first portion along the first direction, the second portion having a second length along the first direction that is smaller than the first length; and

a first opening and a second opening in the first insulated conductive wall, the second opening being between the first portion and the second portion, the two charge storage regions being coupled to one another by the first and second openings,
wherein the at least two charge storage regions are each at least partially surrounded by the insulated conductive walls,
wherein the insulated conductive walls include a second insulated conductive wall and a third insulated conductive wall positioned on two opposing sides of the first insulated conductive wall, the second insulated conductive wall and the third insulated conductive wall each including a portion that extends towards the second opening.