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. 11, 2003
Filed:
May. 03, 2000
Applicant:
Inventors:
Nhon T. Do, Mountain View, CA (US);
John Vu, San Jose, CA (US);
Assignee:
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/334 ; G01R 1/04 ;
U.S. Cl.
CPC ...
H01L 2/334 ; G01R 1/04 ;
Abstract
A test fixture with an isolation plate grounds all of the solder balls of a ball grid array (BGA) of a chip scale package, except for a selected subset of the solder balls, to perform electrical characterization of the package. The isolation plate includes a recess ground into the plate, and a hole in the recess that permits access to the selected subset of solder balls. The recess provides clearance for a fixed compliant probe to land on the solder balls to be tested through the hole, and a probe contact surface for a ground portion of the probe to securely land.