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Chem-Milled SMT Stencils
 Chemically-etched stencils have been around for a long time and still have a place in SMT printing. Photo Stencil has been chemically milling stencils for over 20 years. Many process enhancements have been made over this time period including trapezoidal apertures (1993 Vision Award at Surface Mount International), electropolishing (smoothing the inner aperture walls), and nickel plating (additional smoothing of the inner aperture walls). Although the Chemically-etched stencil is a mature technology, there are still many applications where it is an appropriate solution.
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Applications
- Prototype runs of very low volume with 25 mil of greater aperture pitch
- Stencils with 50 mil pitch and above
- Chem-Etch portion of the hybrid stencil
- BGA Ball Drop Tools requiring 20 to 40 mil thick stencil foils for ball sizes ranging from 20 to 40 mils.
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Advantages
- Quick turn for prototype runs
- Available with electropolish and nickel plating for smooth aperture walls
- Available in thick stencil foil
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Photo Stencil is a proud supporter of the 2008 U.S. Senior Open
