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Tailless Thermo-Compression Bonding

IP.com Disclosure Number: IPCOM000044003D
Original Publication Date: 1984-Oct-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Gobran, F: AUTHOR

Abstract

In thermo-compression bonding a circuit line is repaired by placing a repair ribbon (wire) over the circuit line and passing an electric current between two electrodes which fuse the circuit line and the repair ribbon together. This procedure leaves a repair ribbon remnant, or tail, which must be removed in an additional production operation. This additional operation of trimming the tails can be eliminated by applying tension to the repair ribbon when energizing the braze electrodes. As shown in the drawing, the leading edge tail 18 is eliminated by aligning the ribbon end with the right edge of the brazing electrodes 12 when performing the first braze.

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Tailless Thermo-Compression Bonding

In thermo-compression bonding a circuit line is repaired by placing a repair ribbon (wire) over the circuit line and passing an electric current between two electrodes which fuse the circuit line and the repair ribbon together. This procedure leaves a repair ribbon remnant, or tail, which must be removed in an additional production operation. This additional operation of trimming the tails can be eliminated by applying tension to the repair ribbon when energizing the braze electrodes. As shown in the drawing, the leading edge tail 18 is eliminated by aligning the ribbon end with the right edge of the brazing electrodes 12 when performing the first braze. The trailing edge tail of the repair ribbon 13 is eliminated by lowering the electrodes 12 into position, clamping the ribbon 13 with clamp 14 and applying a light force 15 to place the ribbon in tension. When the electrodes 12 are energized, bonding occurs in the fusion area 16 and simultaneously, the heated ribbon 13 will fail in tension at the trailing edge 17 of the ribbon 13, thus eliminating the tail which usually results from brazing.

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