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. 28, 1989
Filed:
Mar. 21, 1988
Applicant:
Inventors:
Frank Djennas, Mesa, AZ (US);
Curtis W Mitchell, Scottsdale, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437211 ; 437210 ; 437245 ; 428647 ; 428936 ; 427098 ;
Abstract
A process for flashing a thin layer of silver on metal leadframes using no mask steps and a minimal amount of silver. An unmasked metal leadframe is placed into a cleaning bath that includes silver in solution and has no outside electrical driving force to assist plating. The leadframe is removed from the cleaning bath once a uniform silver layer having a thickness of 100 to 1000 angstroms is plated thereon. The silver layer need not be exact and, therefore, it is not critical that the period of time the leadframe remains in the cleaning bath be exact.