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:
Oct. 27, 1998
Filed:
Apr. 21, 1995
Applicant:
Inventors:
Fred Yost, Cedar Crest, NM (US);
Floyd M Hosking, Albuquerque, NM (US);
James L Jellison, Albuquerque, NM (US);
Bruce Short, Beverly, MA (US);
Terri Giversen, Beverly, MA (US);
Jimmy R Reed, Austin, TX (US);
Assignee:
Sandia National Laboratories, Albuquerque, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 5301 ; 73 6448 ; 228103 ;
Abstract
A new test method to quantify capillary flow solderability on a printed wiring board surface finish. The test is based on solder flow from a pad onto narrow strips or lines. A test procedure and video image analysis technique were developed for conducting the test and evaluating the data. Feasibility tests revealed that the wetted distance was sensitive to the ratio of pad radius to line width (l/r), solder volume, and flux predry time.