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. 10, 2007
Filed:
Oct. 07, 2005
Masashi Agata, Osaka, JP;
Masanori Shirahama, Shiga, JP;
Toshiaki Kawasaki, Osaka, JP;
Ryuji Nishihara, Osaka, JP;
Masashi Agata, Osaka, JP;
Masanori Shirahama, Shiga, JP;
Toshiaki Kawasaki, Osaka, JP;
Ryuji Nishihara, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A fuse device and a program transistor are connected in series with each other. A flip-flop turns ON, in response to a start signal, the program transistor to start program of the fuse device. A 2-input NAND circuit outputs an end signal at a time point where change in a resistance value of the fuse device is increased to reach a predetermined level while monitoring change in the resistance value of the fuse device through change in a voltage at a junction point of the fuse device and the program transistor. The flip-flop turns OFF, in response to the end signal, the program transistor to automatically terminate the program of the fuse device. Thus, the resistance value of the fuse device is increased to the predetermined level in a minimum program time.