Patent ID: 7240309

Claim:
A design-check system that checks electrical characteristics of CAD layout data for a printed circuit board, comprising: storage means that stores position-specification conditions that specify a position from said CAD layout data where there is a possibility that poor electrical characteristics will occur due to an influence of CAD layout, characteristic parameters to be extracted, and correction-determination standards that are standards for determining whether or not it is necessary to correct said CAD layout data, which are correlated and registered in a database for each predicted cause of poor electrical characteristics; position-specification means that specifies the position of poor electrical characteristics from said CAD layout data based on said position-specification conditions; characteristic-parameter-extraction means that is operable to extract said characteristic parameters from said specified position; correction-determination means that determines whether or not it is necessary to correct said CAD layout data by comparing the characteristic parameters extracted by said characteristic-parameter-extraction means and said correction-determination standards that correspond to the characteristic parameters read from said storage means; display means that displays a determination result made by said correction-determination means; and selection means operable to, when selected, display on said display means detail information related to error correction registered in said database, when said correction-determination means determines that correction of said CAD layout data is needed.