A plurality of fine leak test chambers for fast individual testing of herically plated microelectronic devices. Each microcircuit component, having already been subjected to a controlled environment of 5 percent helium and 95 percent nitrogen and then assembled, is placed in the chambers and sealed therein. The chambers are evacuated and helium flow rate (if present) is measured by a spectrometer.

A packaged microcircuit includes a housing of insulating material having a plurality of apertures which extend from the interior of the housing to the outside. A metallized lead connection surface is formed on a wall of each aperture. A microcircuit having a plurality of terminals is disposed in the interior of the housing with each of its terminals aligned with a respective aperture. The individual leads extend into the apertures and are soldered to both the terminals and the housing. The first...

To minimize the deposition of materials in portions of a microcircuit structure beyond those intended to be deposited upon through openings in a mask, a special mask holding arrangement is used. This arrangement can be used with several deposition methods which include sputtering and evaporation as well as supplementing these with plating techniques.

The invention concerns a display system comprising a plurality of chip cards (1) and a chip card reader (9), each chip card (1) comprising a software and a body (2) produced in synthetic material and wherein is provided a communication interface, the reader (9) comprising a box (10) and a display screen capable of displaying different messages, the box (10) being provided with a slot (12) capable of receiving a chip card (1), a communication interface being arranged in the slot for providing an ...

A microcircuit for a multi-application chip card, comprising notably a read-only memory (12), a programmable memory (13), and an addressing control circuit (14) for the programmable memory. The programmable memory (13) is subdivided into at least a repertory region (ZR) and an application region (ZA), the repertory region (ZR) comprising, for each application loaded therein, at least a reference code of an application i present in the region ZA.sub.i as well as the addressed ZA.sub.il and ZA.sub...

A microcircuit includes core and other portions, which receive different supply voltages from disparate sources. An electrostatic discharge protection (ESD) circuit internally connects the lower and higher voltage terminals together with a diode, poled so that the diode conducts if the nominally lower voltage supply exceeds the higher voltage supply. If the high voltage supply fails or even drops below the value of the low voltage supply, the diode conducts, and current is drawn in an amount whi...

An airfoil, and in a disclosed embodiment a rotor blade, has a serpentine cooling path. To best account for the Coriolis effect, the paths of the serpentine cooling channel have trapezoidal cross-sections. An area of the rotor blade between a smaller side of the trapezoidal-shaped paths, and a facing wall of the rotor blade has high thermal and mechanical stresses, and is a challenge to adequately cool. A microcircuit, which is a very thin cooling circuit having crossing pedestals, is embedded i...

System, methods, and apparatus for verifying microcircuit designs by interleaving between random and formal simulation techniques to identify input traces useful for driving designs under test into sequences of device states. In a method aspect the invention provides process for beginning random simulation of a sequence of states of a microcircuit design by inputting a sequence of random input vectors to a design under test model in order to obtain a sequence of random simulation states; monitor...

There is disclosed a fully integrated television receiver for receiving a standard antenna or cable input and outputting a standard video baseband signal and a standard audio baseband signal. The receiver employs an up-conversion mixer and a down-conversion image-rejection mixer in series to produce an on-chip IF signal. Audio detection of the IF signal is performed via an audio delay-locked loop operating in quadrature to the audio FM signal. Video detection of the IF signal is performed by fre...

A process for repairing leaking glass-to-metal seals of a hybrid microcircuit header. The process comprises the following steps. A leaking hybrid microcircuit header is delidded (has its lid removed). The leaking hybrid microcircuit header, generally with its leads pointing vertically, is disposed on a vacuum source. A vacuum is formed on the hybrid microcircuit header using the vacuum source. A stream of helium is flowed over the seals to verify the presence of leaks in the seals of the hybrid ...