SILICON-BASED SEMICONDUCTOR DEVICE COMPRISING eFUSES FORMED BY AN EMBEDDED SEMICONDUCTOR ALLOY
First Claim
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1. A method of forming an electronic fuse of a semiconductor device, the method comprising:
- forming an isolation structure in a semiconductor layer so as to laterally delineate a fuse region in said semiconductor layer; and
forming a metal silicide material in said fuse region, said metal silicide material having a first thickness in a contact area of said electronic fuse and having a second thickness in a fuse body of said electronic fuse, said second thickness being less than said first thickness.
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Abstract
An electronic fuse may receive a silicon/germanium material in the fuse body, which in turn may result in the formation of a metal silicide material of reduced thickness. Consequently, the current density and, thus, the electromigration and heat generation in the metal silicide material may be increased for a given amount of current. Consequently, transistor switches for applying the programming pulse to the electronic fuse may be reduced in size.
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Citations
20 Claims
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1. A method of forming an electronic fuse of a semiconductor device, the method comprising:
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forming an isolation structure in a semiconductor layer so as to laterally delineate a fuse region in said semiconductor layer; and forming a metal silicide material in said fuse region, said metal silicide material having a first thickness in a contact area of said electronic fuse and having a second thickness in a fuse body of said electronic fuse, said second thickness being less than said first thickness. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of forming an electronic fuse of a semiconductor device, the method comprising:
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replacing at least a portion of a semiconductor material of a fuse region with a semiconductor mixture, said semiconductor mixture having a silicidation rate that is less than a silicidation rate of said at least a portion; forming a metal silicide material in said semiconductor mixture; and forming contact elements in an interlayer dielectric material so as to connect to contact areas formed in said fuse region. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A semiconductor device, comprising:
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a circuit element formed in and above a first semiconductor region of a semiconductor layer; and an electronic fuse formed in a second semiconductor region of said semiconductor layer, said electronic fuse comprising a first contact area, a second contact area and a fuse body formed in said second semiconductor region, at least said fuse body comprising a first silicon-containing material having a first silicidation rate with respect to a predefined silicidation recipe, said fuse body further comprising a second silicon-containing material formed above said first silicon-containing material and having a second silicidation rate that is less than said first silicidation rate, said electronic fuse further comprising a metal silicide formed in said first and second contact areas and said fuse body according to said predefined silicidation recipe. - View Dependent Claims (17, 18, 19, 20)
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Specification