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Variable Grid and Size Stand-Offs

IP.com Disclosure Number: IPCOM000046607D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07

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Desai, KS Ehrenberg, SG Melvin, GE Urfer, EN [+details]


A solid power plane screening mask for multilayer ceramic (MLC) applications is designed to have a variable stand-off size and a variable grid arrangement such as to minimize the paste covered area while providing for interlevel contacts and meeting sheet resistance requirements. Solid power plane screening masks for MLC have stand-offs placed in a pattern to prevent collapse of the mesh against the MLC greensheet during screening. Stand-off designs in use involve an array of uniform diameter stand-off dots (on a 0.5 mm grid arrangement, as shown in Fig. 1). This is satisfactory for preventing mesh collapse. In order to prevent delamination or excessive camber, it is desirable to reduce the metal covered area of the sheet.