DIRECT FORMATION OF GRAPHENE ON SEMICONDUCTOR SUBSTRATES AND STRUCTURES PREPARED THEREBY
First Claim
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1. A multilayer article comprising:
- a semiconductor wafer comprising two major, generally parallel surfaces, one of which is a front surface of the semiconductor wafer and the other of which is a back surface of the semiconductor wafer, a circumferential edge joining the front and back surfaces, and a central plane between the front and back surfaces; and
a layer of graphene in contact with the front surface of the semiconductor wafer, wherein the layer of graphene is selected from the group consisting of non-doped graphene, nitrogen-doped graphene, boron-doped graphene, and nitrogen-doped and boron-doped graphene.
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Abstract
The invention generally related to a method for preparing a layer of graphene directly on the surface of a semiconductor substrate. The method includes forming a carbon-containing layer on a front surface of a semiconductor substrate and depositing a metal film on the carbon layer. A thermal cycle degrades the carbon-containing layer, which forms graphene directly upon the semiconductor substrate upon cooling. In some embodiments, the carbon source is a carbon-containing gas, and the thermal cycle causes diffusion of carbon atoms into the metal film, which, upon cooling, segregate and precipitate into a layer of graphene directly on the semiconductor substrate.
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17 Claims
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1. A multilayer article comprising:
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a semiconductor wafer comprising two major, generally parallel surfaces, one of which is a front surface of the semiconductor wafer and the other of which is a back surface of the semiconductor wafer, a circumferential edge joining the front and back surfaces, and a central plane between the front and back surfaces; and a layer of graphene in contact with the front surface of the semiconductor wafer, wherein the layer of graphene is selected from the group consisting of non-doped graphene, nitrogen-doped graphene, boron-doped graphene, and nitrogen-doped and boron-doped graphene. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification