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:
Jun. 12, 2001
Filed:
May. 17, 2000
Sheng-Hsiung Yang, Hsin-Chu, TW;
United Microelectronics Corp., Hsin-Chu, TW;
Abstract
A method for forming complementary metal-oxide semiconductor sensor is disclosed. The method includes the following steps. Firstly, a semiconductor substrate is provided. A first oxide layer is formed on the surface of the semiconductor substrate. A nitride layer is formed on the surface of the first oxide layer. Thus, p-type ions are first implanted into the semiconductor substrate to form a p-type well region. The p-type well region is annealed. The nitride layer is removed. The first oxide layer is removed. The second oxide layer is deposited on the surface of the semiconductor substrate. The p-type ions are secondly implanted into the second p-type well region to form a p-type field. The p-type field is annealed. The n-type ions are thirdly implanted into the semiconductor substrate as an n-type region abutting the oxide layer below. The n,-type ions are fourthly implanted into the n-type region as n,-type regions. The p,-type ions are fifthly implanted into the p-type field as a p,-type region. The n,-type region and the p+-type region are annealed to complete a semiconductor sensor device.