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    • 9. 发明专利
    • DRAWING APPARATUS
    • JPS5573052A
    • 1980-06-02
    • JP14531378
    • 1978-11-27
    • TOKYO SHIBAURA ELECTRIC CO
    • HITAI YUTAKAOKUDA NOBUO
    • G03F1/00G06F3/153H01L21/027H01L21/308
    • PURPOSE:To make pattern generation algorithm one and achieve the simplification of drawing circuits by stopping drawing both ends of a straight line when they are out of the drawing region with respect to the apparatus of processing the patterns when they deviate from the drawing region. CONSTITUTION:A rectangle generating circuit FG 501 upon receiving of a command from a pre-processing unit begins to generate the coordinates of a horizontal straight line from the origin 0 of a rectangle and a control circuit 502 returns an end signal 559 to the FG 501 by judging that there is no need for drawing if the Y- coordinate of the horizontal straight line comes in the drawing region, thence it requests the next horizontal straight line. If the Y-coordinate is within the drawing region, it judges that there is possibility of drawing the same and it advances to the next step. Next, when the left end 0 of the horizontal straight line is within the drawing region and the right end P is outside the region, between the right end coordinates Xmax, Y of the region from the left end coordinates QX, Y are drawn. In the case opposite from this, drawing between the given right end coordinates PX, Y from the left end coordinates Xmin, Y of the region is accomplished and the drawing is ended. When both ends are outside the region, nothing is drawn and the drawing is ended.