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printed circuit board
Last modified: Wednesday, November 12, 2003 

printed circuit board
Sometimes abbreviated PCB, a thin plate on which chips and other electronic components are placed. Computers consist of one or more boards, often called cards or adapters. Circuit boards fall into the following categories:
  • motherboard : The principal board that has connectors for attaching devices to the bus. Typically, the mother board contains the CPU, memory, and basic controllers for the system. On PCs, the motherboard is often called the system board or mainboard.
  • expansion board : Any board that plugs into one of the computer's expansion slots. Expansion boards include controller boards, LAN cards, and video adapters.
  • Daughtercard : Any board that attaches directly to another board.
  • controller board: A special type of expansion board that contains a controller for a peripheral device. When you attach new devices, such as a disk drive or graphics monitor, to a computer, you often need to add a controller board.
  • Network Interface Card (NIC) : An expansion board that enables a PC to be connected to a local-area network (LAN).
  • video adapter: An expansion board that contains a controller for a graphics monitor.

    • Printed circuit boards are also called cards.

      Related Links

    PCB Design Conference Information
    Provides details on upcoming PCB Design conferences.

    Printed circuit board fabricators home page
    The Printed Circuit Board Fabricators home page, sponsored by RD Chemical, offers advice and insights on the process for producing a printed circuit board. Each fabrication process is described in great detail. In addition, this site offers a question and answer section, as well as links to related Web sites.
    Related Categories

    Hardware

    Motherboards
    Related Terms

    backplane

    chip

    CNR

    controller

    daughtercard

    expansion board

    expansion slot

    fab

    fabless

    FC-PGA

    form factor

    local-area network

    motherboard

    PGA

    server blade

    silicon

    video adapter
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