| 摘要 |
PURPOSE:To prevent deformation of mask and facilitate high precision assembling of a plurality of masks by previously forming the cut-away part to an insulating films which are inserted between each of plural masks and overlapped. CONSTITUTION:A first flat mask 31 having the reference holes 30 is placed on a box type level 33 having the reference pins 32 with the pins 32 and holes 30 aligned. Next, an insulating film sheet 36 is placed to the previously half-etched area 35 of the non-effective area where the aperture 34 does not exist. Then, a second flat mask 38 having the same reference holes 37 is placed and finally an upper plate 39 is placed thereon. At this time, the insulating film sheet 36 is provided with the almost triangular cut-away portions toward the inner side at the external circumference thereof. Thereby, deformation of mask can be prevented and a plurality of masks can be assembled with high accuracy. |
