Tamper-respondent assemblies with enclosure-to-board protection

A tamper-respondent assembly comprising:

• a circuit board;
• at least one electronic component associated with the circuit board;
• an electronic enclosure mounted to the circuit board and facilitating enclosing the 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;
• an adhesive disposed between the electronic enclosure and the circuit board at an inner periphery of the electronic enclosure, the adhesive contacting, at least in part, the tamper-respondent circuit of the tamper-respondent electronic circuit structure, wherein separation of the electronic enclosure from the circuit board causes the adhesive to break the tamper-respondent circuit, thereby facilitating detection of the separation;
• wherein the adhesive covers, at least in part, the tamper-respondent circuit;
• wherein the adhesive is disposed at an inner periphery of an enclosure-to-board interface where the electronic enclosure mounts to the circuit board;
• and
• wherein the tamper-respondent circuit comprises a plurality of surface-mount components electrically connected in series and spaced along the circuit board at the inner periphery of the enclosure-to-board interface.

A fabrication method comprising:

• fabricating a tamper-respondent assembly, the fabricating comprising:
• providing a circuit board;
• providing an electronic enclosure to mount to the circuit board and enclose at least one electronic component within a secure volume;
• providing a tamper-respondent electronic circuit structure facilitating defining the secure volume, the tamper-respondent electronic circuit structure comprising a tamper-respondent circuit;
• providing an adhesive securing, in part, the electronic enclosure to the circuit board, the adhesive contacting, at least in part, the tamper-respondent circuit of the tamper-respondent electronic circuit structure, wherein separation of the electronic enclosure from the circuit board causes the adhesive to break the tamper-respondent circuit, thereby facilitating detection of the separation;
• wherein the adhesive covers, at least in part, the tamper-respondent circuit;
• wherein the adhesive is disposed at an inner periphery of an enclosure-to-board interface where the electronic enclosure mounts to the circuit board;
• and
• wherein the tamper-respondent circuit comprises a plurality of surface-mount components electrically connected in series and spaced along the circuit board at the inner periphery of the enclosure-to-board interface.