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:
Sep. 02, 2003
Filed:
Dec. 22, 2000
Dana How, Palo Alto, CA (US);
Robert Osann, Jr., Los Altos, CA (US);
Eric Dellinger, Driftwood, TX (US);
Lightspeed Semiconductor Corporation, Sunnyvale, CA (US);
Abstract
A customizable ASIC routing architecture is provided. The architecture utilizes the uppermost metal layers of an ASIC composed of an array of function blocks for routing among function blocks while lower layers are used for local interconnections within the function blocks. The second-to-uppermost metal layer is fixed and generally includes a plurality of parallel segmented conductors extending in a first direction. The uppermost metal layer is customizable in a predesignated manner. Metal in the uppermost metal layer is selectively placed in tracks, which are substantially perpendicular to the segmented conductors in the layer below. Vias are provided between the two uppermost layers. One embodiment of the invention permits one-mask customization of an ASIC. Other embodiments allow a determination to be made of the ideal number of custom mask steps, taking into consideration performance, cost, time, and routability.