| US 7,577,287 B2 | ||
| Early error detection during fabrication of reticles | ||
| Yasuko Saito, Minato-ku (Japan) | ||
| Assigned to NEC Corporation, Tokyo (Japan) | ||
| Filed on Aug. 17, 2005, as Appl. No. 11/205,095. | ||
| Claims priority of application No. 2004-237820 (JP), filed on Aug. 18, 2004. | ||
| Prior Publication US 2006/0039594 A1, Feb. 23, 2006 | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—145 | 13 Claims |

| 1. A reticle fabrication system comprising:
a first preparatory processing means for performing preparatory processing for converting CAD data, which are reticle design
data, to plotting data;
a second preparatory processing means for performing preparatory processing for converting said CAD data to inspection data;
a first preparatory process recording means for recording therein a log file indicative of the content of preparatory processing
of said first preparatory processing means as a first processing log;
a second preparatory process recording means for recording therein a log file indicative of the content of preparatory processing
of said second preparatory processing means as a second processing log;
a comparison/determination means for comparing said first processing log that has been recorded in said first preparatory
process recording means and said second processing log that has been recorded in said second preparatory process recording
means, and for permitting conversion of said CAD data upon determining, based on results of this comparison, that said preparatory
processing has been carried out correctly;
a first conversion means for converting said CAD data to said plotting data when conversion of said CAD data has been permitted
by said comparison/determination means;
a second conversion means for converting said CAD data to said inspection data when conversion of said CAD data has been permitted
by said comparison/determination means; and
an inspection means for inspecting a reticle that has been produced from said plotting data that have been converted by said
first conversion means, using said inspection data that have been converted by said second conversion means.
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