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:
Apr. 04, 1995
Filed:
Jun. 30, 1994
Applicant:
Inventors:
Gerald A DeVolk, Albuquerque, NM (US);
Burt DeVolk, Albuquerque, NM (US);
Assignee:
Printron, Inc., Albuquerque, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ;
U.S. Cl.
CPC ...
75255 ; 420469 ; 428901 ;
Abstract
Electrical conductors on printed circuit board substrates are made from metal particles having a particular particle size range distribution used to control the flow of molten metal when entering the liquid phase such as during fusing. The distribution can follow a bimodal curve wherein the mixture contains approximately 45% by weight of large copper particles between 44-74 microns, 45% by weight of small copper particles less than 5 microns in size with the remaining 10% by weight being particles with sizes between the smaller and larger sizes.