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:
Oct. 09, 2007
Filed:
Jun. 08, 2005
Alin Theodor Iacob, Sunnyvale, CA (US);
Alin Theodor Iacob, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
To achieve the foregoing, and in accordance with the purpose of the present invention, a method and apparatus for testing individual power and ground pins on a semiconductor integrated circuit are disclosed. The method and apparatus includes organizing the power pins of the die into a first group of power pins and a second group of power pins. Each of the first group of power pins are then connected through a first set of resistors to a first common node, and each of the second group of power pins through a second set of resistors to a second common node respectively. A voltage is next applied between the first and second nodes. The voltage at each of the first group of pins is compared with a first threshold voltage and the voltage at each of the second group of pins is compared with a second threshold voltage. Individual bad pins in the first and second groups are identified based on the comparison.