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. 05, 2007
Filed:
May. 31, 2005
Andrej Litwin, Danderyd, SE;
Ola Pettersson, Jaerfaella, SE;
Andrej Litwin, Danderyd, SE;
Ola Pettersson, Jaerfaella, SE;
Infineon Technolgoies AG, Munich, DE;
Abstract
A device for ESD (electrostatic discharge) protection of a circuit of a semiconductor device comprises a field effect transistor based varistor with gate, source and drain regions, wherein one of the source and drain regions is connected to an input/output pad of the semiconductor device, and the other one of the source and drain regions is connected to an input/output terminal of the circuit. A biasing circuit is connected to the gate region of the varistor to create an accumulation region below the gate of the varistor at normal operating voltages of said semiconductor device. The semiconductor device is preferably an integrated device on a single substrate.