SCREEN PRINTING MASK, SOLDER PASTE PRINTING MACHINE USING THE MASK, AND SOLDER PASTE PRINTING METHOD USING THE MASK

摘要

Contact between a printing mask and a printed wiring board does not fail without an excessive load on a squeegee. A printing mask (15) is composed of a laminate of a transparent mask (15a) and a piezochromic compound-containing elastic resin part (15b) made of a resin containing a piezochromic compound which is a dye whose color varies with the pressure exerted on the printing mask. The state of the contact between a printed wiring board (12) and the printing mask (15) is detected as a mask color variation by a surface color variation detector (19). If the contact between the printed wiring board (12) and the printing mask (15) fails, a semiconductor and the support pin provided to the portion of the back where a contact failure exists are lifted to solve the contact failure.