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. 03, 2002
Filed:
Jan. 26, 2001
Applicant:
Inventors:
Christopher Scanlan, Phoenix, AZ (US);
Jon G. Aday, Gilbert, AZ (US);
Assignee:
Amkor Technology, Inc., Chandler, AZ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/348 ;
U.S. Cl.
CPC ...
H01L 2/348 ;
Abstract
A substrate includes a flip chip bond pad and a first bond pad on a dielectric substrate layer. First and second organic solderability protectant (OSP) layers are on the flip chip bond and first bond pad, respectively. A solder paste is on the first OSP layer. The solder paste is reflowed in an inert atmosphere to form a solder-on-pad (SOP) directly on and in contact with the flip chip bond pad. A sufficient thickness of the second OSP layer remains after reflow to inhibit oxidation of the first bond pad.