Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1993-05-24
1997-05-27
Robinson, Ellis
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
427131, 427132, 428426, 264619, B29C 3700
Patent
active
056329423
ABSTRACT:
A method for making multilayer ceramic/glass substrates with electromagnetic shielding. The method comprises the steps of: (a) preparing a homogeneous inorganic slurry composition by blending and milling a mixture containing ceramic or glass powders, or mixture thereof, an aqueous or organic solvent, a polymeric binder resin, a plasticizer, and other appropriate additives; (b) preparing a plurality of precursory ceramic/glass matrixes from the slurry using a tape casting, extrusion, coating, or pressing technique; (c) cutting the precursory ceramic/glass matrixes into a desired shape and size; (d) applying a conductive metal coating layer on at least one precursory ceramic/glass matrix to form a metal-coated precursory ceramic/glass matrix; (e) stacking an uncoated said precursory ceramic/glass matrix on top of at least one metal-coated precursory matrix to form a stacked multilayer precursory substrate; (f) laminating and sintering the stacked multilayer precursory substrate to form a sintered and densified ceramic/glass substrate. Finally the ceramic/glass substrate is trimmed and polished the desired size, shape, flatness and roughness. In a preferred embodiment, the substrate contains two metal coating layers embedded in a three-matrix structure, each of the metal coating layer has a checker-board coated/uncoated pattern allowing the ceramic/glass matrixes in adjacent layers to grow into and connect each other while providing complete areal coverage to adequately protect the substrate from electromagnetic interference.
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Hwang Shiang-Po
Ting Chung-Yu
Wang Chien-Min
Yeh Tsung-Shou
Industrial Technoology Research Institute
Liauh W. Wayne
Robinson Ellis
Speer Timothy M.
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