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:
Dec. 17, 1991
Filed:
May. 03, 1990
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228264 ; 228 19 ;
Abstract
A device having a plurality of columnar structures comprised of a solderable metal disposed on a supporting base is used to remove solder from a substrate surface. Capillary action takes place in the area between the columns, thus removing the solder from the substrate surface. The present invention may be fabricated by forming columnar structures on the supporting base through mask openings or by etching a solderable metal layer into columnar structures. A standoff may be built into the device to prevent solder residue from remaining on the substrate surface between solder pads and to allow a controllable amount of solder to be left on the substrate surface.