PCB production process more complicated, involving a broader range of technology, from simple to complex machining processing machinery, chemical reactions are common photochemical electrochemical heat, and other chemical processes, computer-aided design CAM, and many other knowledge . And in the production process technology and will be a lot of problems from time to time to meet new problems and some problems in finding out the cause of the problem has not disappeared, because of its non-manufacturing process is a continuous line of the form, any of the links will cause problems across the board to stop A large number of middle or end-of-life consequences if the printed circuit board can not scrap recycling, process engineers work pressure, so many of the engineers left the industry to the printed circuit board materials or equipment to do business sales and technical services Work.
The board itself is a substrate by thermal insulation, is not easy to bend the material into the production. Can be seen on the surface of the material is a small circuit copper foil, copper foil is the original coverage on the entire board, and during the manufacturing process to be part of the etching disposed of, left to become part of the network of a small line. These lines, known as wire (conductor pattern), or wiring, and the PCB used to provide parts of the circuit connection.
In order to parts fixed above the PCB, we will direct them to the pin on the wiring in welding. In the most basic PCB (single panel), parts of which were focused on the one hand, is concentrated in the wire on the other side. In this way we need on board in the holes so that pin can pass through to the other side of the board, so parts of the pin was welded in the face of another. For this reason, PCB positive and negative components were known as the face (Component Side) and the welding area (Solder Side).
If there are certain parts PCB chief's needed after the completion of the production can be installed or removed to go back, then the parts will be used to install sockets (Socket). As the outlet is directly in the welding on the board, removable parts can be arbitrary.
If you want to link two pieces of PCB each other, we will generally use so-called "golden finger" side of the joint (edge connector). Goldfinger contains a number of bare copper pad, the copper pad is in fact a part of PCB wiring. Usually connected, which will be a golden finger on the PCB into another film on the PCB slot on the right (generally known as expansion slots Slot). In the computer, such as video card, sound card or other similar interface cards, are to Goldfinger by connect with the motherboard.
PCB on the green or brown, paint is the solder (solder mask) color. This layer is a protective layer of insulation, can protect the copper wire, to prevent parts can be welded to the wrong place. In the solder layer on the other will be printed on the surface layer of screen printing (silk screen). This is usually above will be printed on the text and symbols (mostly white) to mark out the parts on the board. Screen printing surface area is also known as the icon (legend).
Printed circuit board components and parts will be complex between the copper circuit, after a neat and meticulous planning, in an etching on the board, to provide electronic interconnection with the installation of the main support, all non-electronic products or On the basis of lack of spare parts.
PCB to a non-conducting materials are made of flat-panel, in this design are usually flat on pre-drilling to install the chips and other electronic components. Components contribute to the hole so that the definition of pre-printed on the surface of the plate in the path of the metal electronically connect electronic components through the PCB pin and then to electrical conductivity of metal electrode adhesion in the PCB formed on the circuit.
Its application in the field of PCB can be divided into single-panel, two-panel, more than four boards and multilayer soft board. In general, the more complex functions of electronic products, the longer the distance circuit, contact a few feet more, PCB layers needed to have more, such as high-end consumer electronics, information and communications products; plate mainly used in soft and needs Around the bend of the products: such as notebook computers, cameras, car dashboard and so on.