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AssigneeInternational Business Machines Corporation
InventorsGlen P. Double, Steve H. Weingart
Estimating the term…
The present invention provides an intrusion barrier for protecting against mechanical or chemical intrusion into an electronic assembly, especially one containing volatile memory. It includes a screen material surrounding the electronic assembly which screen material has formed thereon fine conductive lines in close proximity to each other. The lines are formed of conductive particles of material dispersed in a solidified matrix of a material which loses its mechanical integrity when removed from the screen. An electrical supply and signal detection circuit is provided which generates an output signal responsive to a given change in resistance of the conductive lines, such that if the resistance changes are a result of a mechanical or chemical attack, a signal is generated which can cause the erasure of the volatile memory. Also, radiation detection and temperature sensing circuits are provided to cause erasure of the volatile memory responsive to detection of a given intensity of radiation or a temperature below a given value.
A barrier in combination with an electronic circuit for protecting against intrusions into an electronic assembly including electronic components comprising;
The assembly as defined in claim wherein said electronic assembly includes flexible circuit means with said components mounted thereon.
The assembly as defined in claim wherein said flexible circuit includes a flexible membrane with circuitry formed on one side and said lines formed on the opposite side.
The assembly as defined in claim wherein the encapsulant is an epoxy.
The assembly as defined in claim wherein said electronic assembly includes pin means to supply input/output signals and power.
The assembly as defined in claim further characterized by means to detect optical input/output signals.
Dependencies are inferred from the claim text.