Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1994-04-21
1995-11-28
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428901, 428464, 156233, 156245, 156246, 216 20, B32B 900
Patent
active
054706440
ABSTRACT:
A laminated sheet allows circuit boards to be fabricated without any special equipment. The laminated sheet can be printed using an ordinary laser printer on a personal computer. The sheet has a conductive layer, such as copper, attached to a nonconductive flexible substrate, such as Kapton. The outer surface of the copper is coated with an ink which provides a receiving surface for toner when the laminated sheet is fed through a printer. The other side of the flexible substrate is attached to a removable layer of paper which provides support for the laminated sheet during the printing process. The paper is removed after printing and the adhesive which held the paper is used to attach the flexible substrate to a rigid substrate. Alcohol is used to remove the ink and expose the copper for etching. The alcohol does not remove the toner which acts as a mask during the etching process. The toner is removed after board fabrication. An alignment procedure allows circuit land patterns to be placed on both sides of a circuit board.
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Press-n-Peel, Owner's Manual, Not dated, pp. 1-2.
DynaArt Designs, Toner Transfer System, Not dated, pp. 1-4.
Lee Kam
Ryan Patrick J.
Smith John C.
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