Active solid-state devices (e.g. – transistors – solid-state diode – Gate arrays – With particular signal path connections
Patent
1995-05-05
1996-12-03
Limanek, Robert P.
Active solid-state devices (e.g., transistors, solid-state diode
Gate arrays
With particular signal path connections
257208, 257776, H01L 2350, H01L 2700
Patent
active
055810985
ABSTRACT:
A structure for routing connections in a semiconductor circuit constructed on a silicon wafer substrate, and a method for making that structure. The routing structure is constructed using two layers of electrical conductors and a set of interlayer connectors, but one of the electrical connection layers is predetermined and need not be programmable. The fixed electrical connection layer is laid out with a plurality of preselected routing connections, such as a set of horizontal or "east-west" connections laid out in a predetermined pattern. The variable electrical connection layer is programmed to make use of the preselected routing connections to connect disparate locations within the circuit on the semiconductor wafer, such as by making vertical or "north-south", and also horizontal, connections to selected horizontal connectors. The pattern of horizontal connections comprises a plurality of horizontal lines, with vertical spacing between pairs of neighboring lines. Each line comprises a set of one or more horizontal segments, with each segment extending for a selected length, and with selected amounts of horizontal spacing between pairs of neighboring segments. Selected lines, such as those coupled to ground or power, may continue without breaks. Preferably, the spacing between lines, the length of each segment, and the spacing between segments are all preselected before construction of the semiconductor circuit.
REFERENCES:
patent: 4549131 (1985-10-01), Kusazaki
patent: 4568961 (1986-02-01), Noto
patent: 4750026 (1988-06-01), Kuninobu et al.
patent: 5185283 (1993-02-01), Fukui et al.
Circuit Integration Technology, Inc.
Limanek Robert P.
Williams Alexander Oscar
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