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A method has been developed to improve the alignment of metal screening masks to frames. The proposal suggests the use of taper pins to locate both the frame and mask.
English (United States)
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Screening Mask to Frame Manual Precision Alignment Fixture
A method has been developed to improve the alignment of metal screening
masks to frames. The proposal suggests the use of taper pins to locate both the
frame and mask.
Existing procedures for the alignment and mounting of metal screening
masks are done manually on an alignment tool with the aid of a microscope. The
masks are mounted to metal frames by means of an adhesive and used in the
screening operation. Alignment capabilities by means of this method range from
+0.012 to +0.0045 in.
The proposed manual precision alignment fixture Fig. 1-1 uses taper pins 2 to
align the mask 3 and another set of taper pins 4 to align the frame 5. There is an
improvement in alignment capability to +0.0016 in. max with this tool.