TGEM Mask Design
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The figure below shows the basic size of a mask for the TGEM preamps. The 2.5 mm diameter holes are for alignment.
The 0.4 mm wide lines in the mask will cover the TGEM holes to prevent filling in the holes with either paste or sputtering material. The center-to-center distance between lines 0.46 mm.
The 4.5 mm diamter alignment holes are 106 mm apart.
Please look at the following file for more details about the mask project.
File:Mask design 04mm 98C 120L 2.5mm diameter adj holes.pdf