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Conductive Tape Plating Mask

IP.com Disclosure Number: IPCOM000039134D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Freeman, MT: AUTHOR [+2]

Abstract

Electrically isolated circuit lines must be connected by a commoning bar to conduct electrical current in those situations where electroplating is required in the construction of printed circuit cards, or the like. After electroplating, the commoning bar must be removed to restore electrical isolation for testing purposes. A plate-masking tape, that has an embedded conductive strip, is used to common the electrically isolated circuit lines, thereby replacing part of the commoning bar. The tape acts as a plating mask and is easily removed after use. The tape works as follows. As seen in Fig. 1, a top view of a printed circuit card 1 having circuit lines 2 with connector tabs 3 (Fig. 2) that must be commoned to permit electroplating.

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Conductive Tape Plating Mask

Electrically isolated circuit lines must be connected by a commoning bar to conduct electrical current in those situations where electroplating is required in the construction of printed circuit cards, or the like. After electroplating, the commoning bar must be removed to restore electrical isolation for testing purposes. A plate-masking tape, that has an embedded conductive strip, is used to common the electrically isolated circuit lines, thereby replacing part of the commoning bar. The tape acts as a plating mask and is easily removed after use. The tape works as follows. As seen in Fig. 1, a top view of a printed circuit card 1 having circuit lines 2 with connector tabs 3 (Fig. 2) that must be commoned to permit electroplating. A conductive plate-masking tape 5 is placed over the circuit lines common with the connector tabs 3 (bottom tabs not seen) to common the circuit lines 2 by establishing electrical contact with commoning bar 4. The tape 5 (Fig. 2) has an embedded wire 6 that makes electrical contact with the circuits 2. The tape 5 is chemical-resistant to serve as a plating mask to prevent electroplating selected areas of circuitry. After plating, the tape 5 is removed by peeling it off the circuit lines 2 to restore electrical isolation.

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