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:
May. 01, 1984
Filed:
Jul. 10, 1981
Applicant:
Inventors:
Anil Gercekci, Geneva, CH;
Heinz B Maeder, Taeby, SE;
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; G11C / ;
U.S. Cl.
CPC ...
357 40 ; 235487 ; 235492 ; 357 45 ; 357 85 ; 357 84 ; 365 94 ; 365189 ; 29583 ; 29591 ;
Abstract
An integrated circuit chip having a digital memory is provided wherein direct access to at least a portion of the memory is prevented. Contact pads having coupling lines to couple the contact pads to the memory bus are provided. A security code can be programmed into a portion of the memory during wafer probe and test. When the integrated circuit chip is removed from the wafer the coupling lines between the contact pads and the memory bus are destroyed since the coupling lines are made to extend off of the chip.