Stmicroelectronics S.a.

Nathalie Revil

Philippe Delpech

An integrated circuit fuse is formed on a substrate by etching a polysilicon, metal or alloy layer deposited thereon to include a central region, at the end of which are zones with electrical contacts. The central region has at least two first electrically parallel arms. A zone of intersection of the first two arms forms a point for focusing a fusing current which facilitates the fusing of the fuse by increasing local current density flowing through the integrated circuit.

Integrated circuit fuse, with focusing of current

An integrated circuit fuse includes a substantially bar-shaped central region and zones having electrical contacts. The central region includes a thinned zone forming a weak point facilitating fusing of the fuse by increasing the local current density as compared to standard fusing conditions. The thinned zone is preferably obtained by proximity optical effect between the fuse and adjacent dummy elements.

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Meylan, France

Nathalie Revil