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:
Jan. 14, 2003
Filed:
Jun. 19, 2001
Chong-Yao Chen, Chang-Hua, TW;
Chen-Bin Lin, Taipei, TW;
United Microelectronics Corp., Hsinchu, TW;
Abstract
A method of fabricating CMOS image sensor. On a substrate, an isolation layer is formed to partition the substrate into a photodiode sensing region and a transistor element region. Next, on the transistor element region, a gate electrode structure is formed and then, a source/drain region is formed at the transistor element region of the two lateral sides of the gate electrode structure. At the same time, a doping region is formed on the photodiode sensing region. After that, a self-aligned barrier layer is formed on the photodiode sensing region and a protective layer is formed on the substrate. Then, a dielectric layer and a metallic conductive wire are successively formed on the protective layer. Again, a protective layer is formed on the dielectric layer and the metallic conductive wire, wherein the numbers of the dielectric layers and the metallic conductive wire depend on the fabrication process. A protective layer is formed between every dielectric layer.