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. 13, 1987
Filed:
May. 16, 1986
Robert B Hitchcock, Wappingers Falls, NY (US);
Eduardo Kellerman, Endicott, NY (US);
John P Koons, Apalachin, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A printed circuit board for electric circuits is formed of plural layers of electrical conductors and includes through holes and vias arranged in a regular pattern along points of a grid laid out along othorgonal axes of a Cartesian coordinate system. Electrical components such as circuit chips and discrete components are to be mounted to the through holes, while the vias connect electrical conductors of different layers. Conductors of a layer are grouped together as multiple-conductor channels which are routed among the through holes and the vias to make electrical connections among the electrical components. An additional via can be entered in a central portion of a grid cell by rerouting conductors of channels in the cell through arcuate segments, thereby permitting connection between conductors of channels on different layers while preserving the original grid pattern of through holes and vias.