US Patent 7409661 Computer-aided thermal relief pad design system and method

A computer-aided thermal relief pad design system includes a depicting unit, a memory unit and a calculating unit. The depicting unit is used for depicting an elongated oval pattern of a thermal relief pad. The elongated oval pattern includes two perpendicular axes that intersect at a center point, and a plurality of terminals. The memory unit is used for storing formulae defining relationships between lengths of the two axes and coordinates of the terminals. The coordinates of the terminal define positions of the terminals relative to the center point. The calculating unit is used for calculating the coordinates of the terminals based on the formulae stored in the memory unit.