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:
Nov. 19, 2013
Filed:
Nov. 22, 2011
Daniel J. Fainstein, Beacon, NY (US);
Alberto Cestero, Poughkeepsie, NY (US);
Subramanian S. Iyer, Mount Kisco, NY (US);
Toshiaki Kirihata, Poughkeepsie, NY (US);
Norman W. Robson, Hopewell Junction, NY (US);
Sami Rosenblatt, White Plains, NY (US);
Daniel J. Fainstein, Beacon, NY (US);
Alberto Cestero, Poughkeepsie, NY (US);
Subramanian S. Iyer, Mount Kisco, NY (US);
Toshiaki Kirihata, Poughkeepsie, NY (US);
Norman W. Robson, Hopewell Junction, NY (US);
Sami Rosenblatt, White Plains, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A random intrinsic chip ID generation employs a retention fail signature. A 1and 2ID are generated using testing settings with a 1setting more restrictive than the 2, creating more fails in the 1ID bit string that includes 2ID bit string. A retention pause time controls the number of retention fails, adjusted by a BIST engine, wherein the fail numbers satisfy a predetermined fail target. Verification confirms whether the 1ID includes the 2ID bit string, the ID being the one used for authentication. Authentication is enabled by a 3ID with intermediate condition such that 1ID includes 3ID bit string and 3ID includes 2ID bit string. The intermediate condition includes a guard-band to eliminate bit instability problem near the 1st and 2ID boundary. The intermediate condition is changed at each ID read operation, resulting in a more secure identification.