Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
428167, 428168, 428172, 428323, 428146, 428492, 428408, 428409, 428901, 428447, 118 50, 4254051, 156285, B32B 300, C23C 1400
A sheet material for use as a vacuum bag in the vacuum laminating of printed circuit boards, to heat sinks. The material of the sheet is flexible and electrically conductive to both conform around electrical components and to prevent damage to the components due to electrostatic discharge. In addition, the material has one surface which is textured. The sheet material is formed into an enclosure to hold the circuit board and heat sink and it is the textured surface which is placed in contact with the "populated" surface of the board to permit air to be easily removed from the bag enclosure during the initial evacuation stage of the lamination process.
patent: 4290838 (1981-09-01), Reavill et al.
patent: 4610908 (1986-09-01), Reylek et al.
Loney Donald J.
Plevy Arthur L.
Robinson Ellis P.
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