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:
Jun. 22, 2010
Filed:
Oct. 18, 2007
Bernhard Lange, Fresiling, DE;
Steven Kummerl, Carrollton, TX (US);
Bernhard Lange, Fresiling, DE;
Steven Kummerl, Carrollton, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Texas Instruments Deutschland GmbH, Freising, DE;
Abstract
An interference interlock between leadframe features and a mold compound is provided in a packaged semiconductor device by exposing at least one predetermined surface area to an etching process prior to a molding step. This produces an etched recess with a recessed wall delimited by a step wall, generally perpendicular and adjacent to the recessed wall. The step wall is partially undercut by etching. During the molding step, the recessed wall and the step wall are both contacted by and embedded in the molding compound.