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The purpose
of a metal stencil is the transfer of solder paste (or similar
mediums) through the aperture openings onto a given substrate.
The goal of the technology that's employed to make the stencil
is to ensure that this transfer is as efficient and complete
as possible. There are several post processes that enhance the
stencils performance.
Field reports have indicated that at 25 Mil pitch and above
there is not much difference in performance between a laser
cut stencil and a chemically etched stencil. However, below 20
Mil pitch the laser cut stencil significantly outperforms a
chem-etched stencil. A laser cut stencil has none of the
limitations that is characteristic of a chem-etched stencil,
i.e. aperture walls with knife edge impediment, aspect ratio
restraints, tooling mis-registration opportunities.
At present, 20 Mil pitch seems to be the defining line as to
which technology to employ.
KRISTEEL also has technical expertise and know how of
manufacturing of Glue stencils for printing adhesives for
Double sided boards as an alternative to dispensing.
The important thing to remember is that KRISTEEL can provide
whatever technology is required. Chemically etched stencils,
laser cut stencils, dual technology stencils,
electro-polishing, trapezoidal apertures, and pad
modifications are all done in-house.
KRISTEEL is a full service stencil supplier.
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