PCB, printed circuit Board, also known as printed wring board, it is used in electronics to build electronic devices. A PCB serves two purposes in the construction of an electronic device; it is a place to mount the components and it provides the means of electrical connection between the components.
PCBA, printed circuit board assembly, in through-hole technology component leads are inserted in holes. In surface-mount technology (SMT) the components are glued on pads or lands on the surfaces of the PCB. In both component leads are then mechanically fixed and electrically connected to the board by soldering.
Since 2009, more and more electronic manufacturers, in order to save time to find assembly factory, they always have two choices: let the PCB factory do OEM at same time, or purchasing PCB by assembly factory directly. By both of models, the electronic manufacturers only need to fit the housing and set the program, a full product finished then.
Generally speaking, electronic manufacturer always choose the supplier who can provide one-stop service; or would like to choose the assembly factory, and then let them purchase PCB for them. Because now the PCB price is gradually transparent, and so easy to purchase, but the PCB factory isn’t familiar with different components and price, it is harder for them then.
Since 2010, More PCB manufacturer begin to add SMT process line. This kind of one step style, have been accepted by more and more electronic manufacturers. Of course, there also have both advantage and disadvantage. The OEM plant will get more benefit, but more risks exist at the same time. The main reason due to purchase components for customer, every electronic products need different components, even though for same products, if design with different drawing, the different components need also. So if purchased wrong components, the full PCB and components will have to been scrapped, direct economic losses, it is difficult estimate also… An increase in human and material resources, it is then hard to avoid. However, under the pressure of market competition, PCB and PCBA produced by one package service, it is inevitable.