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:
Mar. 17, 2015
Filed:
Mar. 08, 2013
Freescale Semiconductor, Inc., Austin, TX (US);
Tab A. Stephens, Austin, TX (US);
Perry H. Pelley, Austin, TX (US);
Michael B. McShane, Austin, TX (US);
Paul A. Grudowski, Austin, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
An anti-counterfeiting security circuit is incorporated into an authentic integrated circuit device to induce failure in a counterfeited integrated circuit device by forming the security circuit (e.g.,) with one or more operatively inert high-k metal gate transistors (e.g., HKMG PMOS) having switched or altered work function metal layers () where the security circuit defines a first electrical function with the one or more operatively inert high-k metal gate transistors and defines a second different electrical function if the one or more operatively inert high-k metal gate transistors were instead fabricated as operatively functional high-k metal gate transistors of the first polarity type with a work function metal layer of the first polarity type, the security circuit would define a second different electrical function.