US Patent 7524695 Image sensor and pixel having an optimized floating diffusion

Patent 7524695 was granted and assigned to Omnivision Technologies, Inc. on April, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Omnivision Technologies, Inc.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

75246950

Patent Inventor Names

Howard E. Rhodes0

Date of Patent

April 28, 2009

Patent Application Number

115099450

Date Filed

August 25, 2006

Patent Primary Examiner

‌

Kevin M. Picardat

Patent abstract

An active pixel includes a a photosensitive element formed in a semiconductor substrate. A transfer transistor is formed between the photosensitive element and a floating diffusion and selectively operative to transfer a signal from the photosensitive element to the floating diffusion. The floating diffusion is formed from an n-type implant with a dosage in the range of 5e13 to 5e14 ions/cm2. Finally, an amplification transistor is controlled by the floating diffusion.