Backside-illuminated (BSI) image sensor with reduced blooming and electrical shutter

US8946795B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8946795-B2
Application numberUS-201113050285-A
CountryUS
Kind codeB2
Filing dateMar 17, 2011
Priority dateMar 17, 2011
Publication dateFeb 3, 2015
Grant dateFeb 3, 2015

How to read this patent

A practical reading order for non-experts. Skip the full description unless you need deep technical detail.

  1. Title

    What the patent document calls the invention.

  2. Abstract

    A short plain-language summary of the technical disclosure.

  3. Assignees and inventors

    Who owns or filed the patent and who is credited as inventor.

  4. Key dates

    Filing, priority, publication, and grant dates set the timeline.

  5. First independent claim

    The legal scope of protection — read this for what is actually claimed.

  6. CPC / IPC classifications

    Technology tags used to group this patent with similar filings.

  7. Citations and related patents

    Prior art links and similar publications in this corpus.

Abstract

Official abstract text for this publication.

Embodiments of a pixel including a photosensitive region formed in a surface of a substrate and an overflow drain formed in the surface of the substrate at a distance from the photosensitive area, an electrical bias of the overflow drain being variable and controllable. Embodiments of a pixel including a photosensitive region formed in a surface of a substrate, a source-follower transistor coupled to the photosensitive region, the source-follower transistor including a drain, and a doped bridge coupling the photosensitive region to the drain of the source-follower transistor.

First claim

Opening claim text (preview).

The invention claimed is: 1. A pixel comprising: a photosensitive region formed in a surface of a substrate; and a floating node formed in the surface of the substrate; a transfer gate coupling the photosensitive region to the floating node; a source-follower amplification transistor including a drain and a gate, the source-follower gate electrically connected to the floating node; and a doped bridge formed in the surface of the substrate to couple, without intermediate co…

Assignees

Inventors

Classifications

Patent family

Related publications grouped by family.

External sources

Next steps

Free tools are coming soon. Tell us what you want to track and we'll notify you.

Frequently asked questions

Answers are generated from the same data shown on this page.

What does patent US8946795B2 cover?
Embodiments of a pixel including a photosensitive region formed in a surface of a substrate and an overflow drain formed in the surface of the substrate at a distance from the photosensitive area, an electrical bias of the overflow drain being variable and controllable. Embodiments of a pixel including a photosensitive region formed in a surface of a substrate, a source-follower transistor coup…
Who is the assignee on this patent?
Chen Gang, Hu Sing-Chung, Mao Duli, and 6 more
What technology area does this patent fall under?
Primary CPC classification H10F39/1865. Mapped technology areas include Electricity.
When was this patent published?
Publication date Tue Feb 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).