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:
Jul. 17, 2001
Filed:
Feb. 13, 1998
Naohiro Kobayashi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Information for defining a structure of an address bit arrangement of a ROM portion of layout data is affixed, by means of text data as a discriminator, to a typical ROM cell portion indicating a characteristic of the address bit arrangement. Layout data including the affixed information is read in. ROM coordinate information and the text data are extracted. A ROM definition for generating a mask pattern is generated from the extracted ROM coordinate information based on ROM data. Thus, the layout information generating apparatus extracts the arrangement information and coordinate information of a ROM portion automatically, not manually, to generate a ROM definition, thereby considerably decreasing the number of steps to improve productivity.