Laser antifuse using gate capacitor
First Claim
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1. A laser antifuse, having first and second physical states, fabricated in an integrated circuit, the laser antifuse comprising:
- a first conductive plate;
a second conductive plate; and
a layer of BaSrTiO3 dielectric material located between the first conductive plate and the second conductive plate,wherein the first conductive plate and the second conductive plate are electrically isolated by the layer of BaSrTiO3 dielectric material in the first physical state, and wherein the first conductive plate and the second conductive plate are electrically connected through the layer of BaSrTiO3 dielectric material in the second physical state in response to a focused external radiation source.
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Abstract
An integrated circuit laser antifuse is described which has two physical states. In the first physical state the laser antifuse has to conductive plates electrically separated by a layer of dielectric material. In the second physical state the two conductive plates are electrically connected through the dielectric in response to an external radiation source, such as a laser.
72 Citations
18 Claims
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1. A laser antifuse, having first and second physical states, fabricated in an integrated circuit, the laser antifuse comprising:
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a first conductive plate; a second conductive plate; and a layer of BaSrTiO3 dielectric material located between the first conductive plate and the second conductive plate, wherein the first conductive plate and the second conductive plate are electrically isolated by the layer of BaSrTiO3 dielectric material in the first physical state, and wherein the first conductive plate and the second conductive plate are electrically connected through the layer of BaSrTiO3 dielectric material in the second physical state in response to a focused external radiation source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A laser antifuse, having first and second physical states, fabricated in an integrated memory circuit, the laser antifuse comprising:
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a first conductive plate, the first conductive plate being a layer of polysilicon; a second conductive plate, the second conductive plate being a well fabricated in a substrate of the integrated memory circuit; and a layer of BaSrTiO3 dielectric material located between the first conductive plate and the second conductive plate, wherein the first conductive plate and the second conductive plate are electrically isolated by the layer of BaSrTiO3 dielectric material in the first physical state, and wherein the first conductive plate and the second conductive plate are electrically connected through the layer of BaSrTiO3 dielectric material in the second physical state in response to a focused external radiation source. - View Dependent Claims (11, 12, 13, 14)
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15. A method of programming a laser antifuse, the method comprising the steps of:
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fabricating an integrated circuit having a laser antifuse, the laser antifuse comprising, a first conductive plate, a second conductive plate, and a layer of BaSrTiO3 dielectric material located between the first conductive plate and the second conductive plate, wherein the first conductive plate and the second conductive plate are electrically isolated by the layer of BaSrTiO3 dielectric; and electrically connecting the first conductive plate and the second conductive plate by focussing an external radiation source on the first conductive plate such that a conductive path is formed through the layer of BaSrTiO3 dielectric material. - View Dependent Claims (16, 17, 18)
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Specification