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. 08, 2001
Filed:
Mar. 10, 1999
Applicant:
Inventors:
Kenneth Burton Gilleo, Cranston, RI (US);
David Blumel, New York, NY (US);
Assignee:
Fry's Metals, Inc., Jersey City, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/144 ; H01L 2/148 ; H01L 2/150 ;
U.S. Cl.
CPC ...
H01L 2/144 ; H01L 2/148 ; H01L 2/150 ;
Abstract
A flip chip having solder bumps, an integrated underfill, and a separate flux coating, as well as methods for making such a device, is described. The device is characterized in that the underfill material is provided on the chip surface prior to the application of solder bumps, and then treated to form apertures therein which act as a mask for solder bump application. The resulting device is well suited for a simple one-step application to a printed circuit board, thereby simplifying flip chip manufacturing processes which heretofore have required a separate underfilling step.