Syntellect Inc.

Other

3m Innovative Properties Company

Geoffrey W Gates

John M Saltwick

Dean Scarinci

William O Sparks

Frank E Bumb, Jr

David C Good

A contact set and compressible interposer, methods for producing them and a compliant interconnect assembly for providing electrical connection of a first electronic device to a second electronic device. The compliant interconnect assembly comprises a contact set and a compressible interposer. The contact set includes an electrically insulating, flexible film with at least one conductive contact suspended therein to provide an electrically conductive path through the film. Formation of at least one de-coupling hole in the flexible film, close to a conductive contact, further contributes to independent movement of the conductive contact. A compressible interposer in the form of an electrically insulating elastomer matrix, surrounding electrically isolated conducting elastic columns, provides a localized conductive path through the thickness of the elastomer sheet. The compliant interconnect assembly forms when a contact set lies adjacent to a compressible interposer with engagement between at least one conductive contact and at least one conducting elastic column.

Compliant interconnect assembly

An apparatus for testing a device including a plurality of elements each having contact surface and a non-contact surface, the apparatus comprising a base for holding the device, the base having a contact surface engageable with the contact surface of each element, an actuator, a plurality of compliant members carried by the actuator to engage the non-contact surface of each element, each compliant member further including an aspect ratio of at least 1:1, and means for exerting a force against the actuator, the aspect ratio for allowing the compliant members to compensate for physical variations of the elements, provide compliance between the apparatus and the elements and substantial coplanarity between the contact surface of each element and the contact surface of the base while allowing a sufficient focusing of force by the compliant members against the non-contact surface of each element to provide contact between the contact surface of each element and the contact surface of the base without damaging the elements.

Apparatus and method for testing a device

A system and method are disclosed for preventing intelligible interception of information signals transmitted over a two-direction line. A masking signal is applied through a hybrid circuit at the receiving end of the line, and this masking signal, which appears on the line together with the information signal, prevents intelligible decoding. Only at the receiving end of the line, where the hybrid circuit attenuates the masking signal which it receives at its receive port, can intelligible decoding take place. Signal processing techniques used at the receiving end permit larger amplitude masking signals to be used, thus creating even greater confusion for an unauthorized detecting mechanism which is coupled to the line.

System and method for communications security protection

A technique for inhibiting intelligible interception of information signals transmitted over a line from a first site to a second site. A masking signal is applied to the line immediately upon the detection of the information signal at the second site, but prior to the time at which the validity of the signal is verified. As long as the information signal remains on the transmission line, the masking signal is repeatedly turned on and off to thereby inhibit decoding of the signal by an eavesdropping device.

System and method for securing DTMF transmission

A system and method are disclosed for preventing intelligible interception of information signals transmitted over a two-direction line. A masking signal is applied through a hybrid circuit at the receiving end of the line, and this masking signal, which appears on the line together with the information signal, prevents intelligible decoding. The masking signal includes a series of frequencies which are sequentially applied. Only at the receiving end of the line, where the hybrid circuit attenuates the masking signal which it receives at its receive port, can intelligible decoding take place. The amplitude of the information signals is sensed at the receiving end and the amplitude of the masking signals on the line is adjusted to be great enough to provide security, by confusing an eavesdropping detector, yet small enough at the receiving end so that the receiving detector is not confused.

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Phoenix, AZ, United States of America

Geoffrey W Gates