Stencils having enhanced wear-resistance and methods of manufact

Details Stencils having enhanced wear-resistance and methods of manufact Stencils having enhanced wear-resistance and methods of manufact

1994-09-15

1995-10-24

Heinrich, Samuel M.

Metal fusion bonding

Including means to apply flux or filler to work or applicator

By partial or total immersion of work or applicator into liquid

2282481, 118406, 101127, 1011284, 427249, 427282, B23K 300, B41M 128, C23C 1626

Patent

active

054603161

ABSTRACT:
Stencils having enhanced wear-resistance consisting of a metal body, preferably fabricated from stainless steel, having a first major surface and a second major surface and a plurality of apertures extending through the metal body from the first major surface to the second major surface, and a diamond coating which is preferably applied to at least the top surface of the metal body, and to the side walls of the plurality of apertures. Such stencils are particularly useful for positioning solder paste in predetermined areas on contact pads of printing wiring boards. The diamond coating is preferably deposited on the stencil surfaces from a vapor phase of carbon-containing gases. By applying the diamond coating to the top and side wall surfaces of the stencil, improved wear-resistance is achieved, resulting in increased service life for the stencils.

REFERENCES:
patent: 4299164 (1981-11-01), Jonkers
patent: 4401520 (1983-08-01), Steppan et al.
patent: 4953460 (1990-09-01), Wojcik

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