Integrated circuit having reroutable conductive paths

Details Integrated circuit having reroutable conductive paths Integrated circuit having reroutable conductive paths

1989-03-10

1990-11-27

Hille, Rolf

357 30, 357 45, H01L 27020, H01L 27140

Patent

active

049740482

ABSTRACT:
An integrated circuit that may be modified or repaired following its fabrication. The integrated circuit (80/80'/80") includes two chips (82, 84) having terminals (88, 90, 92, 94, 96, and 98), which are interconnected by first conductors (100, 102, 108, 110, 114, and 116) and second conductors (104, 112, and 118). Switchable connectors (126, 128) can be selectively activated to convey current through portions of two bus conductors (120, 122), and/or through a redundant line (124), to interconnect specific terminals of the two chips in order to bypass a break or short circuit in the first and second conductors. In addition, switchable disconnectors (134, 136) may be selectively activated to create discontinuity in specific conductors. A focused laser beam (162) is used to activate selected switchable connectors and disconnectors by heating them, thereby changing the current path interconnecting the terminals of the two chips.

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R. F. Broom and A. Moser, Discretionary Interconnection Method for Integrated Circuits, Apr. 1972, 3549-3550.

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