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:
Jul. 02, 2013
Filed:
Jul. 26, 2011
Lu-an Chen, Keelung, TW;
Tai-hsiang Lai, Miaoli County, TW;
Tien-hao Tang, Hsinchu, TW;
United Microelectronics Corp., Hsinchu, TW;
Abstract
An electrostatic discharge protection circuit is located between a first voltage terminal and a second voltage terminal. The electrostatic discharge protection circuit includes a first semiconductor switch and a second semiconductor switch. The first semiconductor switch is electrically connected to the first voltage terminal. If a voltage at the first voltage terminal complies with a starting condition, the first semiconductor switch is turned on, so that an electrostatic discharge current flows through the first voltage terminal and the first semiconductor switch. The second semiconductor switch is electrically connected between the first semiconductor switch and the second voltage terminal, wherein the electrostatic discharge current from the first semiconductor switch passes to the second voltage terminal through the second semiconductor switch.