Chemistry: electrical and wave energy – Processes and products
Patent
1974-09-23
1977-07-05
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
1011284, 204 24, C25D 108, C25D 700
Patent
active
040338312
ABSTRACT:
A bi-metal screen for the fabrication of precisely di-mentioned thick film elements and a method of screen fabrication. The bi-metal screen comprises a first metal screen which provides a web or mesh with accurately placed openings for holding a spacer sheet which contains the desired thick film pattern. The mesh is electroformed onto the spacer sheet, and a cavity with accurate cross section control corresponding to the dimensions of the desired thick film element is produced in the spacer sheet from the opposite side of the mesh. The spacer is also etched through the openings in the support mesh to permit inking of the thick film cavity from the mesh screen side. Accurate alignment is maintained between the opening of the support mesh and the pattern of the desired thick film elements during fabrication.
REFERENCES:
patent: 2071249 (1937-02-01), Cantor
patent: 2419026 (1947-04-01), Norris
patent: 2469689 (1949-05-01), Gresham
patent: 2569752 (1951-10-01), Fowler
patent: 3139392 (1964-06-01), Mears
patent: 3325319 (1967-06-01), Frantzen
patent: 3359192 (1967-12-01), Heinrich et al.
Dynamics Research Corporation
Tufariello T. M.
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