Conti Temic has developed and tested a control circuit for transmission applications, which features fine-line gold tracks and thin gold bonding. The company has chosen QG150 gold conductor and resistors (2000 series) from DuPont Microcircuit Materials to manufacture the control circuit for their new applications. The QG150 is a thin dense gold which is printed with 150 micron lines/space and provides the interconnect surface for over 1200 gold wire bonds per circuit.
The transmission control unit (TCU) is an electronic system which operates the traditional gear box. In the automated manual system, it consists basically of a dual clutch operating system, where the gear change is carried out by transfer of power from one clutch to the other. For a few years the automotive industry has been working on the prototyping and industrialisation of these new systems, which will now be implemented in a large number of new models of vehicles. Control units are subjected to harsh environments. As with all under-the-hood electronics where temperatures can range from –40 °C to 150 °C, control circuits are subject to thermal stress and have to withstand constant vibration.
EPP Europe 442
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