Integrated circuit
First Claim
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1. An integrated circuit including a Schottky diode, the diode comprising:
- an active region bordered by an isolation region in a semiconductor substrate of the integrated circuit, wherein a portion of the surface of the active region is covered by a protection layer;
a first electrode comprising a first metal contact directly in contact with a surface of the active region such that an intervening silicide contact is not connected between the first metal contact and the active region, wherein the first metal contact extends through the protection layer to meet the surface of the active region; and
a second electrode comprising a second metal contact and a silicide contact in direct contact therewith, the silicide contact of the second electrode being in direct contact with the surface of the active region, wherein the silicide contact is provided on an exposed portion of the surface of the active region not covered by the protection layer.
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Abstract
An integrated circuit including a Schottky diode, and a method of making the same. The diode includes an active region bordered by an isolation region in a semiconductor substrate of the integrated circuits, a first electrode having a metal contact provided on a surface of the active region, and a second electrode having a silicide contact also provided on the surface of the active region.
8 Citations
17 Claims
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1. An integrated circuit including a Schottky diode, the diode comprising:
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an active region bordered by an isolation region in a semiconductor substrate of the integrated circuit, wherein a portion of the surface of the active region is covered by a protection layer; a first electrode comprising a first metal contact directly in contact with a surface of the active region such that an intervening silicide contact is not connected between the first metal contact and the active region, wherein the first metal contact extends through the protection layer to meet the surface of the active region; and a second electrode comprising a second metal contact and a silicide contact in direct contact therewith, the silicide contact of the second electrode being in direct contact with the surface of the active region, wherein the silicide contact is provided on an exposed portion of the surface of the active region not covered by the protection layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making an integrated circuit including a Schottky diode, the method comprising:
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providing a semiconductor substrate; providing an isolation region in the substrate, wherein the isolation borders an active region of the substrate; covering a portion of the surface of the active region with a protection layer; forming a first metal contact directly in contact with a surface of the active region to provide a first electrode of the diode, wherein the first metal contact extends through the protection layer to meet the surface of the active region without an intervening silicide contact being positioned therebetween; forming a silicide contact on said surface of said active region, wherein the silicide contact is formed on an exposed portion of the surface of the active region not covered by the protective layer of semiconductor material; and forming a second metal contact directly in contact with the silicide contact to provide a second electrode of the diode. - View Dependent Claims (11, 12, 13, 14)
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15. A method for making an RFID tag, the method including the method of making an integrated circuit including a Schottky diode for making an integrated circuit of the RFID tag, the method comprising:
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providing a semiconductor substrate; providing an isolation region in the substrate, wherein the isolation borders an active region of the substrate; covering a portion of the surface of the active region with a protection layer; forming a first metal contact directly in contact with a surface of the active region to provide a first electrode of the diode, wherein the metal contact extends through the protection layer to meet the surface of the active region without an intervening silicide contact being positioned between the first metal contact and the active region; forming a silicide contact on said surface of said active region, wherein the silicide contact is formed on an exposed portion of the surface of the active region not covered by the protective layer of semiconductor material; and forming a second metal contact directly in contact with the silicide contact to provide a second electrode of the diode. - View Dependent Claims (16, 17)
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Specification