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:
Sep. 24, 1991
Filed:
Sep. 13, 1990
Applicant:
Inventor:
Chen Y Wang, San Jose, CA (US);
Assignee:
Samsung Semiconductor, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G06F / ;
U.S. Cl.
CPC ...
3241 / ; 324 731 ; 324550 ; 371 211 ;
Abstract
A laser fuse signature circuit for testing whether a fuse link in an IC has been disconnected includes a first series circuit connecting the power and ground pins and a second series circuit, including the fuse and a plurality of diode devices, connecting an input pin to a first node in the first series circuit. Transistors included in the first series circuit are connected so that the laser fuse signature circuit does not conduct current during normal operation or leakage current testing of the IC.