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:
Sep. 24, 2002
Filed:
Apr. 25, 2001
Applicant:
Inventors:
Ming-Hung Chou, Miaoli, TW;
Chia-Hsing Chen, Hsin-Chu, TW;
Smile Huang, Tainan, TW;
Cheng-Jye Liu, Chungli, TW;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/362 ;
U.S. Cl.
CPC ...
H01L 2/362 ;
Abstract
The present invention provides a protection circuit comprising one diode wherein the diode is formed by diffusing a heavily doped material of a first conductivity type into a first region of a second conductivity type. An integrated circuit, such as a memory array, is coupled to the diode. The other diode back-to-back is coupled to the diode wherein the other diode is formed by diffusing a heavily doped material of the second conductivity type into the first region and a second region of the first conductivity type. The two diodes in series are capable of discharging for the memory array during manufacturing process.