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:
Nov. 19, 2013
Filed:
May. 02, 2012
Applicant:
Donald C. Abbott, Chartley, MA (US);
Inventor:
Donald C. Abbott, Chartley, MA (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/495 (2006.01);
U.S. Cl.
CPC ...
Abstract
A metal leadframe strip () for semiconductor devices is described. The leadframe strip has a plurality of sites () for assembling semiconductor chips. The sites alternate with zones () for connecting the leadframe to molding compound runners. The sites () have mechanically rough and optically matte surfaces (). The zones () have at least portions with mechanically flattened and optically shiny metal surfaces (). The flattened surface portions transition into the rough surface portions by a step.