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Basic Knowledge of Printed Circuit Board (PCB)

Posted on February 21 2013 by Printed circuit board, sometimes abbreviated PCB, is a thin plate on which chips and other electronic components are placed. Development of the methods used in modern printed circuit boards started early in the 20th century. in custom circuit board, multilayer PCB design, Custom Printed Circuit Board

Printed circuit board, sometimes abbreviated PCB, is a thin plate on which chips and other electronic components are placed. Development of the methods used in modern printed circuit boards started early in the 20th century. In 1903, a German inventor, Albert Hanson, described flat foil conductors laminated to an insulating board, in multiple layers. Thomas Edison experimented with chemical methods of plating conductors onto linen paper in 1904. Arthur Berry in 1913 patented a print-and-etch method in Britain, and in the United States Max Schoop obtained a patent to flame-spray metal onto a board through a patterned mask. Charles Durcase in 1927 patented a method of electroplating circuit patterns.

Computers consist of one or more boards, often called cards or adapters. Circuit boards fall into the following categories (you can also have custom circuit board):

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.

Laminates

Laminates are manufactured by curing under pressure and temperature layers of cloth or paper with thermoset resin to form an integral final piece of uniform thickness. There is plenty of multilayer PCB design. The size can be up to 4 by 8 feet (1.2 by 2.4 m) in width and length. Varying cloth weaves (threads per inch), cloth thickness, and resin percentage are used to achieve the desired final thickness and dielectric characteristics.

Materials

Excluding exotic products using special materials or processes, all printed circuit boards manufactured today can be built using the following four items which are usually purchased from manufacturers: Laminates, Copper-clad laminates, Resin impregnated B-stage cloth (Pre-preg), and Copper foil.
www.pcbxz.com is a specialist in the production of single, double-sided, and multilayer circuit boards. The company utilises advanced production equipment and production technology, enabling it to perform rough shape cutting-drilling, PTH, lines, electroplating, solder, tin spray, anti-oxidation, gold plating, gold immersion, electrical measurement, and shape–packaging.

This article come from:http://www.chinaphoneparts.com/index.php/basic-knowledge-of-printed-circuit-board-pcb.htm
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