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:
May. 06, 2008
Filed:
Dec. 23, 2003
Won-ho Lee, Ichon-shi, KR;
Won-Ho Lee, Ichon-shi, KR;
MagnaChip Semiconductor, Ltd., Cheongju, KR;
Abstract
A test pixel for use in a CMOS image sensor is employed to evaluate a pixel quality by modulating a contact chain. The test pixel for use the CMOS image sensor including: a test pixel active area corresponding to each unit pixel active area, wherein the unit pixel active area has a floating diffusion contact, a VDD contact and an output contact therein; an active area contact having a first, a second and a third contacts disposed at predetermined locations of each test pixel active area, wherein the first, the second and the third contacts are correspondent to the floating diffusion contact, the VDD contact and the output contact in the unit pixel, respectively; a contact chain in order for a test current to flow vertically or a horizontally through the active area contact; a test pad having a first test pad and a second test pad; and a test gate of which a predetermined portion is overlapped over the test pixel active area, for applying a predetermined signal thereto.