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Tamper-respondent assemblies with enclosure-to-board protection

  • US 10,172,232 B2
  • Filed: 11/30/2017
  • Issued: 01/01/2019
  • Est. Priority Date: 12/18/2015
  • Status: Active Grant
First Claim
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1. A tamper-respondent assembly comprising:

  • a circuit board;

    an enclosure adhesively secured to a surface of the circuit board via a first adhesive, the enclosure facilitating enclosing at least one electronic component within a secure volume;

    a tamper-respondent electronic circuit structure facilitating defining the secure volume, the tamper-respondent electronic circuit structure comprising a tamper-respondent circuit with at least one circuit line disposed on the surface of the circuit board and extending around an inner periphery of an enclosure-to-board interface where the enclosure mounts to the circuit board via the first adhesive; and

    a second adhesive securing, in part, the enclosure to the circuit board, the second adhesive being a different adhesive than the first adhesive, and covering, at least in part, the tamper-respondent circuit of the tamper-respondent electronic circuit structure, wherein the second adhesive is disposed, in part, on the surface of the circuit board at the inner periphery of the enclosure-to-board interface where the enclosure mounts to the circuit board, and the second adhesive extends around the inner periphery of the enclosure-to-board interface where the enclosure mounts to the circuit board, and separation of the electronic enclosure from the circuit board causes the second adhesive to break the tamper-respondent circuit, thereby facilitating detection of the separation.

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