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:
Jan. 13, 1987
Filed:
May. 10, 1984
David C Smith, Williamstown, NJ (US);
Richard Noto, Maple Shade, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
A routing process for automatic computer aided routing of customizing conductors in a universal array which has a single customizing conductive layer is improved by executing a pathfinding routing process for conductors which connect pins on the same row before routing other conductor types. Routing of conductors which connect a pin on the side surface to a pin in the basic unit row region is improved by initially restricting permissible routes to be within a set of three contiguous rectangles. Routing opportunities for potentially failed conductors are increased by allowing customizing conductors to extend parallel to the length of the basic unit rows in the region between adjacent tunnel ranks in the final routing step. An improved custom IC results. The conductor number of the shortest and the longest conductor in each class is stored separately from the routing grid matrix so that these numbers can be directly retrieved as needed. Since the conductors are arranged in class and length order in the wiring matrix, the routing process in going through any class of conductors in an attempt to route them retrieves them in a length order (long-to-short or short-to-long).