CAM DATA PREPARING METHOD FOR ELECTRONIC CIRCUIT BOARD, CAD/CAM SYSTEM FOR ELECTRONIC CIRCUIT BOARD, COMPUTER PROGRAM USED THEREFOR, AND MANUFACTURING METHOD FOR ELECTRONIC CIRCUIT BOARD

摘要

PROBLEM TO BE SOLVED: To provide a CAM data preparing method for an electronic circuit board capable of converting a CAD data reflected with each inside diameter of each opening of a solder resist layer exactly and efficiently into a CAM data comprising each inside diameter D' of each opening of an exposure mask for photolithography for forming the opening.;SOLUTION: The each opening inside diameter D' of the solder resist layer reflected on the CAD data is converted as the CAM data into a mask pattern D₀ for the openings of the exposure mask for the photolithography to form the openings of a solder resist layer by a photolithographic process using a photosensitive resin. A ratio D₀/D' of the mask pattern D₀ for the each opening to the each opening inside diameter D' is corrected in response to the density of the plurality of openings distributed in a plane of the solder resist layer.;COPYRIGHT: (C)2005,JPO&NCIPI