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Printed Circuit Board vs Printed Circuit Assembly

A PCB (Printed Circuit Board) is a board used to electrically connect and mechanically support components using pads, conductive tracks and several other features etched from sheets of copper laminated onto non-conductive substrates. There are various types of PCBs like single sided, double sided or multilayer PCB.

While Printed Circuit Assembly is the board obtained after all printing solder paste on the PCB and then mounting various components like resistors, ICs (Integrated Circuits), capacitors and any other components like transformers depending on the application and desired characteristics of the board. A PCBA usually undergoes reflow furnace heating to establish a mechanical connection between the PCB and the components.

Printed Circuit assembly is an important electronic part to load electronic components and connection carrier of electronic components conduction. Why called is due to fabrication with a printing technology.

PCB is classified as single layer, double-sided and multilayer in terms of circuit layers. Multilayer PCB with 4-layers and 6-layers is typical. More complex multilayer PCB has up to dozens of layers. It is also can be divided into rigid board, flexible board and flex-rigid board. Printed board evolved from single layer to double-sided, multilayer and flexible board, retaining respective development tendency.

Printed circuit assembly is a term of electronic processing industry, mainly refers to a variety of electronic parts, IC etc. materials welded or inserted in a blank circuit board and quality inspection and test, to ensure that it has a complete circuit connection performance.

Blank board is manufactured on the basis of customer printed circuit assembly file. Therefore, there isn’t any electronic parts on the blank board, but a variety of pads. After the mounted plug, mounted that is SMT, which means that electronic parts are welded on the pad, then need to use the DIP plug-in auxiliary processing, complete the whole welding process.