The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2007
Filed:
Jun. 29, 2004
Kensuke Sawase, Kyoto, JP;
Yuji Matsumoto, Kyoto, JP;
Kiyotaka Sawa, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A production method for an image sensor which is provided with a plurality of sensor portions arranged on a semiconductor substrate and each having a first photodiode constituted by a first region of a first conductivity type and a second region of a second conductivity type different from the first conductivity type and a second photodiode constituted by the second region and a third region of the first conductivity type. The method includes the steps of: forming a second region of the second conductivity type on a first region defined in a semiconductor substrate by epitaxial growth; and forming a third region of the first conductivity type on the second region by epitaxial growth.