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:
May. 21, 2002
Filed:
Nov. 08, 1999
Yasuhisa Yamada, Tokyo, JP;
Yuzo Ogawa, Kanagawa, JP;
NEC Corporation, Tokyo, JP;
Abstract
Plural patterns of cell projections made in an aperture are stored in a register. Cells in designed data are compared with the cell projections stored in the register by an interlayer operation, to judge whether or not a cell which coincides with any one of the cells in the designed data is present among the patterns of the cell projections stored in the register. In the case that the judgement that the coinciding cell is present is given, the coinciding cell projection is e acted and outputted as data for direct-writing. In the case that the judgement that no coinciding cell is present is given, if a cell whose reference frequency is over a given value is present, this cell is extracted and registered as a new cell projection.