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Metal-free monolithic epitaxial graphene-on-diamond PWB

  • US 9,504,158 B2
  • Filed: 04/22/2014
  • Issued: 11/22/2016
  • Est. Priority Date: 04/22/2014
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a circuit board made of polycrystalline diamond; and

    a substantially hollow tube formed within the circuit board, the tube terminating at one or more surfaces of the circuit board, the tube comprising a layer of graphene that is operable to permit the tube to conduct electrical current.

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