Screen printing method and apparatus therefor

摘要

PCT No. PCT/JP97/01702 Sec. 371 Date Nov. 6, 1998 Sec. 102(e) Date Nov. 6, 1998 PCT Filed May 20, 1997 PCT Pub. No. WO97/44192 PCT Pub. Date Nov. 27, 1997A screen printing method is provided in which the exchange of machine types is achieved in a short time and even minute patterns or narrowly pitched patterns can be precisely positioned for screen printing. The method comprises finding an amount of movement of the circuit board from positions of recognition marks (2, 2) on a circuit board (1) and positions of recognition marks (5, 5) on a screen plate (4), positioning the circuit board (1) in relation to the screen plate (4) on the basis of the amount of movement of the circuit board (1), detecting a discrepancy between a pattern of apertures (18) and a pattern of lands (19) in a particular portion of the circuit board (1), finding a positional correction from the discrepancy, and positioning the circuit board (1) in relation to the screen plate (4) on the basis of the amount of movement of the circuit board and the positional correction.