Integrated circuit programmable cross-point connection technique
Patent 4670749 Issued on June 2, 1987. Estimated Expiration Date: 
June 2, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 2, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3852723 Cross-point switch matrix and multiswitching network using the same Cross-point switch matrix and multistage switching network using the same Control means for a solid state crossbar switch Patent #: 4331956 InventorApplicationNo. 06/599931 filed on 04/13/1984US Classes:326/38, Having details of setting or programming of interconnections or logic functions257/E21.591, Modifying pattern or conductivity of conductive members, e.g., formation of alloys, reduction of contact resistances (EPO)257/E27.105, Masterslice integrated circuit (EPO)326/39Array (e.g., PLA, PAL, PLD, etc.)ExaminersPrimary: Weldon, UlyssesAttorney, Agent or FirmInternational ClassesH01L 21/768 (20060101)H01L 21/70 (20060101) H01L 27/118 (20060101) AbstractA technique for programming connections of conductors that is particularly adapted to be implemented as part of an integrated circuit so that a number of connections internal of the circuit can be made from outside the circuit in order to customize it after fabrication. A specific arrangement of five switching transistors is particularly advantageous for each cross-point of two conductors to be connected together in one of many possible ways. The desired switching arrangement at each cross-point may be programmed by use of the same conductors being interconnected to carry control signals from outside the circuit to a memory associated with each cross-point switching circuit. While these memories are being programmed, each cross-point is temporarily forced to a desired state for communicating the control signals from outside the circuit to the memories.Other References
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