fabrication pcb Printed Circuit Board Manufacturing Explained
Printed Circuit Board Manufacturing Explained PCBs explained
A printed circuit board (PCB) can be found in most devices that are an integral part of our life today. From complex computer systems to the more ubiquitous cell phones and digital watches, PCBs are used in almost all electronic devices
The manufacturing process
The base of a PCB is a thin sheet made from a non-conducting material such as fiberglass epoxy laminate. The various conducting components that form an electronic circuit are http://www.voiceblog.jp/pcbonline/ mounted on top of this insulating material. The wiring is either printed or etched on a PCB using a special deposition or printed technique. Copper http://instantblogsubscribers.com/?w=chinapcb or other advanced conducting inks are typically used for creating a circuit. Before the wiring process begins, however, a wiring diagram needs to be prepared. This diagram acts as a guideline or reference point for the printed circuit board manufacturing process.
With the wiring in place, various components can now be mounted on the PCB. For this purpose, very fine holes are drilled onto the surface of the PCB using needle-thin drill heads. The various components are then fixed in place to complete the electronic circuit. An alternative method is to directly solder the various components onto the surface of the PCB. This is known as surface mounting technology or SMT. Using SMT, hundreds of tiny components can be accommodated on a relatively small surface area. This technique calls for the use of sophisticated machinery.
Testing and quality control
Most printed circuit board manufacturing firms also apply a protective layer on the PCB to prevent corrosion. Next is the testing process where circuit errors, if any, are identified and corrected. Once all these steps have been followed, the PCB itself is integrated into the product and wired to the other components. Often times, a single product contains more than one PCB.
The most basic PCB is a two-layer PCB. However, as electronic circuits get more sophisticated, PCBs can have as many as eight, ten or even twelve layers. It takes a great deal of expertise to manufacture a PCB, so firms often prefer to outsource this task.
Choosing the right PCB manufacturing firm
There are several PCB manufacturers that offer specialized services for the most complex requirements. These firms can be approached to design the entire PCB or they can be requested to take your idea and turn it into a PCB. Since such firms are equipped with all the required tools and skills, they can professionally handle all your printed circuit board requirements.
When choosing a printed circuit board manufacturing firm, it is essential that you select one with several years of experience. There are many players in the market today, but only a few are experienced enough to handle your project efficiently.