Appeal No. 96-0289
Application 07/935,301
directed toward a nonelected invention.
THE INVENTION
Appellants’ claimed invention is directed toward a method for forming a semiconductor fuse
having a fusible metal link in contact with polysilicon, and a method for blowing such a fuse by passing
electric current through the link to melt the link, wherein the melted link is absorbed into the polysilicon.
Appellants state that absorbing the metal link into the polysilicon prevents the metal from growing back
together to reconnect the fusible link (specification, page 2). Claims 1 and 19 are illustrative and read
as follows:
1. A method for fabricating a semiconductor fuse, comprising:
providing an insulating layer:
forming a polysilicon pad on top of said layer; and
forming a fusible metal link on top of and in contact with said pad;
wherein a programming current through said link melts the metal which is absorbed by
said polysilicon pad, thereby preventing the link's growback.
19. A method for blowing a fusible link by passing an electric current therethrough, comprising:
melting the link; and removing the melted link by absorbing it into polysilicon.
THE REFERENCES
Takemae et al. (Takemae) 4,903,111 Feb. 20, 1990
Choi 5,242,851 Sep. 7, 1993
(filed Jul. 16, 1991)
2
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