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Stencil Printing of Small Apertures

SMTnet Express October 25, 2012, Subscribers: 25748, Members: Companies: 9022, Users: 33865

Stencil Printing of Small Apertures

First published in the 2012 IPC APEX EXPO technical conference proceedings.

by: William E. Coleman Ph.D.; Photo Stencil

This paper will examine stencil technologies (including Laser and Electroform), Aperture Wall coatings (including Nickel-Teflon coatings and Nano-coatings), and how these parameters influence paste transfer for miniature devices with Area Ratios less than the standard recommended lower limit of .5. A matrix of print tests will be utilized to compare paste transfer and measure the effectiveness of the different stencil configurations. Area Ratios ranging from .32 to .68 will be investigated...

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