It is the intention of motor vehicle manufacturers to achieve weight and cost savings by replacing wiring harnesses with flexible printed circuits in doors, roof liners, boots and cockpits. Flexible printed circuits have been used in cars since the late 1960's. One of the first, in the UK, was a Vauxhall Viva model that had the instrument cluster wiring replaced by a flexible circuit and since that time such circuits have taken over this function für most vehicles. The use of flexible PCB's in automotive applications is therefore weil established but their use in the place of wiring harnesses introduces a major new factor, namely, much larger size. A typical instrument cluster circuit would be 500 mm x 250 mm although circuits up to 700 mm lang have been made. The circuits required as harness substitutes are potentially much larger with up to 1500 mm x 750 mm being considered für cockpit applications. It is this factor that presents the challenge für flexible circuit manufacturing processes and produces the need für a development of solutions für the material, process and reliability issues involved. These circuits will be required in high volume and must meet the requirements of the vehicle and equipment suppliers with respect to cost eftectiveness and reliability while presenting an achievable. economically sound manufacturing technology to the circuit suppliers. Design issues include requirements tor CAN-bus, EMC/RFI protection, 42 volt systems and the integration of functional modules.In the investigation of manufacturing technology for large area circuits für automotive application a number of design and construction options have been identified. The circuit may be made as a single piece embodying all the required features including plated through holes and surface mounted components; it may be assembled from separate elements such as a central core and connected limbs with the components confined if possible to the central element; or it may me constructed as a single large circuit to which the functional circuitry, requiring small areas of surface mounted components, would be added as separate patches. Account must also be taken of manufacturer's issues such as manufacturing cost, space requirements and manning levels für the production facility. Equipment and vehicle manufacturers will require costs competitive with current harness systems, ease of installation, design change and circuit modification. Garage repair shops and vehicle owners require ease of fault finding and repair and, in the case of the owners, low repair costs. The selection process will be assisted by computer modeling taking into account all the identified factors, design and process failure mode and effect analysis and detailed consideration of the necessary processes. Established processes tram which a technology route can be selected have been identified and discussed in the foregoing; other processes that might be used may be identified as the development process proceeds.


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    Titel :

    Foresight vehicle: large area flexible circuits for automotive applications manufacturing technology - a review of process options


    Weitere Titelangaben:

    Voraussehendes Fahrzeug: Fertigungstechnik für große flexible gedruckte Schaltungen in Fahrzeugen - ein Überblick über Verfahrensoptionen


    Beteiligte:
    Cottrill, M.C.W. (Autor:in) / Jaggernauth, W.A. (Autor:in) / Webb, D.P. (Autor:in) / Palmer, P.J. (Autor:in) / Conway, P.P. (Autor:in) / West, A.A. (Autor:in)


    Erscheinungsdatum :

    2002


    Format / Umfang :

    9 Seiten, 1 Tabelle, 5 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






    2002-01-1127 Foresight Vehicle: Large Area Flexible Circuits for Automotive Applications Manufacturing Technology - A Review of Process Options

    Cottrill, M. C. W. / Jaggernauth, W. A. / Webb, D. P. et al. | British Library Conference Proceedings | 2002


    Business Case Modelling of Large Area Flexible Circuits in the Foresight Vehicle Programme

    West, Andrew A. / Carrott, Andrew J. / Cottrill, Michael et al. | SAE Technical Papers | 2002


    Business case modelling of large area flexible circuits in the Foresight Vehicle Programme

    Carrott,A.J. / West,A.A. / Conway,P.P. et al. | Kraftfahrwesen | 2002