HARDWARE (PCB) A thin sheet which electronic components are fixed by welding. Potential customers components and integrated circuit pins may pass through holes ("vias") in the board or they can be mounted on the surface, in this case, no holes are required (though they can still be used to connect different layers). The simplest type of PCB with components and wires on one side and linker (PCB) on the other. PCBs may have components mounted on both sides and can have multiple layers inside, allowing more connections to fit in the same council area. Councils with the internal conductive layer usually has "plated through holes" to improve the electrical connection to internal layers. The connections are metal strips (usually copper). The pattern of connections are normally produced by using photo resist and etching. Value, especially those for high frequency circuits as modern microprocessors, often have one or more "ground plane" and "power planes", which is great plains for greater carrying ability today. A computer or other electronic system can be built from multiple PCBs, such as processors, memory, graphics controllers, disk controllers, etc. The board can all plug into the motherboard Home or backplane or are connected by a ribboncable.
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