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Printed circuit board (PCB)

A printed circuit board (PCB) is a circuit board fabricated by densely mounting a plurality of parts on a plate made of phenol resin or epoxy resin and densely forming curtailed circuits on the surface of the plate to connect the respective parts to each other. A PCB is used as critical parts of electric and electronic products for connecting electronic parts to each other along a circuit pattern designed on a substrate or supporting the electronic parts, and acts as a passive component widely used in home appliances, communication devices, and industrial devices. Printed circuit boards (PCB's) with electrical components are widely used in the electronics industry in a variety of products including computers, servers, televisions and telecommunication devices. Printed circuit boards generally comprise a composite of organic and inorganic materials with external and internal metal traces, permitting assembled electronic components to be mechanically supported and electrically connected. Eectronic components are placed on the top or the bottom layer of the printed circuit board and its signal pins, voltage source pins, and ground pins are separately connected to other electronic components, the voltage source layer and the ground layer on the surface of the printed circuit board. The electronic components can be categorized into analog electronic components and digital electronic components based on their signal characteristics. Analog electronic components include audio chips, amplifiers, power supplies, etc. Digital electronic components include digital signal processors (DSP), microprocessors, image signal (video) drivers, etc. Conductive material called a "trace" connects the electrical devices mounted to the printed circuit board. Conductive planes may be placed above or below the traces. The traces and the planes may be separated by a dielectric or non-conductive material. A typical printed circuit board includes one or more metal layers, such as routing and/or plane layers, and one or more insulation layers. The insulation layers is disposed substantially between successive metal layers with each outer layer of the printed circuit board comprising one of the metal layers. The metal routing layers is patterned to transfer signals between assembled electronic components. The metal plane layers is designed to distribute power and/or ground, respectively, throughout the printed circuit board. A multilayer printed circuit board includes an internal layer and an external layer on both sides of the internal layer. Through holes can be formed in the inner layer connecting wiring on the front side and on the back side of the internal layer. The PCB may be classified into a single-sided PCB, a double-sided PCB, and a multi-layered PCB according to the number of sides of the PCB in which the circuit pattern is formed. Printed circuit boards are also classified into two sorts according to their substrates: rigid printed circuit boards and flexible printed circuit boards. The rigid printed circuit board is principally applied in a motherboard or a peripheral card of a computer, a communication product, such as a board of a cell phone. A flexible printed circuit board (FPC) is a circuit board which can be easily bent and is typically formed by laminating a circuit pattern to a base film of a suitable resin known in the art. Such an FPCB is widely used to connect various parts of electronic equipment.

categoryPrinted circuit board (PCB) categories


Flexible printed circuit (FPC) Flexible printed circuit (FPC) (3)

PCB assembly PCB assembly (5)


productsPrinted circuit board (PCB) product listings


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