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[anti]fuse-based printed circuit board?

Discussion in 'Electronic Components' started by Adam Megacz, Mar 5, 2007.

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  1. Adam Megacz

    Adam Megacz Guest

    Forgive me if this is the wrong newsgroup for this.

    Has anybody every tried making/selling an "[anti]fuse programmable"
    printed circuit board?

    The idea would be like Actel's antifuse-based FPGAs at a board scale:
    you have a mesh of wires connected by fuses (or antifuses). You
    destructively program the device by asserting high voltages on the
    appropriate wire pairs to break (make) connections through fuses

    In the PCB situation you'd probably want all the fuses on the surface
    on one side of the board, and several layers of wiring (six?). The
    programming network would need two copper layers of its own (probably
    the fuse side and the layer beneath that).

    If this actually worked, hobbyists would be able to make reasonably
    complex mulit-layer PCBs without an investment in machinery or having
    to deal with a third-party manufacturer. I guess the question is
    whether or not you can make and mount an array of that many
    [anti]fuses cheaply enough (or even somehow create them using the same
    expose/etch process used for the copper, but with a different
    material). Obviously it would also depend on the electrical quality
    of the blown antifuses (or unblown fuses) and how small/many you could

    Anyways, either this is completely nuts, or else somebody's already
    done it. I suspect the former, but I figured people here would know
    which is the case.

    Here's Actel's product, which is basically the same thing at VLSI

    - a
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