| 摘要 |
PURPOSE:To prevent a fault caused by adhesion of dust, etc. generated by static electricity by making a conductive elastomer whose one end is grounded contact to a side face of a substrate, when an original picture is brought to contact exposure by sticking a picture forming material to a picture forming substrate surface. CONSTITUTION:When manufacturing a printed circuit substrate, etc., a composite plate 4 obtained by sticking a picture forming material to a picture forming substrate surface is placed between a glass plate 2 of a contact exposure use jig 1 and a plastic film 6. For instance, a strip-like body or a round rod-like body 5' of a conductive elastomer of 10<0>-10<7>OMEGAcm volume specific resistance is made to contact to one side face of the composite plate 4, and one end of an elastomer 5 or 5' is made to contact to absorbing metallic parts 3 and grounded. In this way, the film 6 is made to adhere tightly to the composite plate 4 and exposed by ultraviolet rays, and thereafter, when taking out the composite plate 4 by releasing a vacuum and separating the glass plate 2 and the film 6, it is prevented that a defective is caused in a product circuit substrate, etc. due to discharge to the human body of static electricity, and adhesion of dust and foreign matter to the glass plate 2, the film 6, etc. |
