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. 02, 2003
Filed:
Dec. 23, 1998
Applicant:
Inventors:
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 7/20 ; H01L 2/3495 ; H01L 2/334 ;
U.S. Cl.
CPC ...
H05K 7/20 ; H01L 2/3495 ; H01L 2/334 ;
Abstract
The lead frame has a spring element, which can be compressed during the injection molding of the package by an injection mold. The resultant resilience has the effect that a contact surface of the lead is pressed against an inside wall of the injection mold. The biasing of the contact surface against the inside wall prevents polymer flash from forming on the contact surface. Also, the spring element fixes the lead during the injection operation and anchors the lead in the completed package. Hold-down pins within the injection mold are thus obviated.