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Fuse and antifuse reprogrammable link for integrated circuits

  • US 5,412,593 A
  • Filed: 01/12/1994
  • Issued: 05/02/1995
  • Est. Priority Date: 01/12/1994
  • Status: Expired due to Term
First Claim
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1. A reprogrammable electrical circuit comprising:

  • a first terminal;

    a second terminal;

    a link, connected between said first terminal and said second terminal, wherein said link includes at least one fuse and at least one antifuse, said fuse and said antifuse being connected together in series, whereby the circuit is reprogrammable so as to alternatively open and close an electrically conductive path between said first terminal and said second terminal;

    a first fuse and a first antifuse connected in series to form a first series sublink, said first series sublink connected on one end to said first terminal and on the other end to said second terminal;

    a second fuse, connected in parallel with said first series sublink, wherein said link comprises said first sublink and said second fuse, whereby allowing reprogramming of said semiconductor device more than once; and

    a second antifuse and a third fuse connected in series to form a second series sublink, said second series sublink connected in parallel with said first fuse, whereby allowing programming of said semiconductor device more than once.

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