Printed Circuit Board (PCB) is a mechanical assembly consisting of layers of fibreglass sheet laminated with etched copper patterns. It is used to mount electronic parts in a rigid manner suitable for packaging. Also known as a Printed Wiring Board (PWB).
China is one of the major industrial producers of PCBs due to the exponential growth in the communication, consumer, automotive and electronics industries.
PCB fabrication China has been relatively a cost-effective solution to the major problem of in-house production of PCBs by companies themselves. A number of producers have started adopting high-Tg and Grade-A boards, and are releasing halogen- and lead-free units, due to their compliance with the green protocol.
PCB fabrication cost in China has been relatively cheaper than the others due to automotive factory setups and cheap labour costs.
The printed circuit board (PCB) acts as the linchpin for almost all of today’s modern electronics. If the device needs to do any sort of computation — such as is the case even with simple items like a digital clock — there’s a good chance, there’s a PCB inside. PCBs, bring life to electronics by routing the electrical signals where they need to go to satisfy all of the device’s requirements. For this to happen, PCBs are laid over a network of paths outlined in the traces. It’s these copper pathways that allow PCBs to direct electrical currents around their surface.
Main types of circuit boards
There are three main types of circuit boards that get manufactured on a consistent basis, and it’s important to understand the differences between each so you can decide the right circuit board for your requirements. The three main types of circuit boards in current manufacture are:
Single-Sided Circuit Boards
These boards when made with an FR4 base have a rigid laminate of woven glass epoxy material, which is then covered on one side with a copper coating that is applied in varying thicknesses depending on the application. A single-sided PCB has electronic components and circuits on only one side. This type of board works best for simple electronics, and at-home hobbyists often design and construct this type of board first. Single-sided boards tend to cost less to mass-produce than other board types. But despite this low cost, they’re used infrequently because of their inherent design limitations.
Double-Sided Circuit Boards
Double-sided boards have the same woven glass epoxy base as single-sided boards — however, in the case of a double-sided board; there is a copper coating on both sides of the board, also to varying thicknesses depending on the application
These use the same base material as single and double-sided boards, but are made with copper foil instead of copper coating — the copper foil is used to make “layers,” alternating between the base material and copper foil until the number of desired layers is reached.