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. 24, 2014
Filed:
Jul. 06, 2011
Ming-hsiang Song, Shin-Chu, TW;
Jam-wem Lee, Zhubei, TW;
Tzu-heng Chang, New Taipei, TW;
Yu-ying Hsu, Pingzhen, TW;
Ming-Hsiang Song, Shin-Chu, TW;
Jam-Wem Lee, Zhubei, TW;
Tzu-Heng Chang, New Taipei, TW;
Yu-Ying Hsu, Pingzhen, TW;
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Abstract
An ESD protection circuit includes a pad of an IC, circuitry coupled to the pad for buffering data, an RC power clamp on the IC, and first and second silicon controlled rectifier (SCR) circuits. The RC power clamp is coupled between a positive power supply terminal and a ground terminal. The first SCR circuit is coupled between the pad and the positive power supply terminal. The first SCR circuit has a first trigger input coupled to the RC power clamp circuit. The second SCR circuit is coupled between the pad and the ground terminal. The second SCR circuit has a second trigger input coupled to the RC power clamp circuit. At least one of the SCR circuits includes a gated diode configured to selectively provide a short or relatively conductive electrical path between the pad and one of the positive power supply terminal and the ground terminal.