Prints become more inconsistent at the edges of the squeegee blade.
Print pattern size
Large print patterns (> 50% of the inside diameter of the stencil) can
cause poor or unusual printing on the edges of the print pattern.
Vacuum and vacuum plate
Slots in the workplate can be cut to allow vacuum to flow through. The
vacuum is then used to hold down the flexible polyimide TAB tape. A standard
set of slots can also be cut into the workplate and a vacuum plate can be used
for each CSP TAB tape design. Leaking around the polyimide tape can cause
variations in the print.
Mounting of the squeegee in the squeegee holder
Too much pressure on the squeegee can bulge it. This will cause the edge to
flatten on the stencil foil. When the edge is flatter during prints, the
adhesive will vary in height when printed.
Change
