PCBgogo

PCB and PCBA are the cornerstones of electronic products. In order to improve the yield rate, circuit board manufacturers spare no effort to improve the board manufacturing process, and also use various professional testing instruments to find product defects.


The English of PCB is the abbreviation of Printed Circuit Board, which is often called bare board or bare board in the industry. It is an important component, a support for electronic components, and a carrier for electrical connection of electronic components.

PCBA, even if PCB+components are assembled, refers to the circuit board obtained by the PCB light board after SMT loading and then through DIP plug-in. Generally speaking, it is a circuit board after installing components such as resistors, integrated circuits, and capacitors.

SMT surface mount technology mainly uses the placement machine to mount some tiny parts on the PCB board. The production process is: PCB board positioning, printing solder paste, placement machine placement, reflow oven and finished inspection .

DIP means "plug-in", that is, inserting parts on the PCB board. This is the integration of parts in the form of plug-ins when some parts are larger in size and are not suitable for placement technology. Its main production process is: sticking adhesive, plug-in, inspection, wave soldering, printing and finished inspection.

What tests are required for PCBA circuit boards?

PCBA testing is the most critical quality control link in the entire PCBA processing process, which determines the final performance of the product. At present, the main test items of PCBA include ICT test, FCT test, aging test and fatigue test.

ICT test: mainly includes circuit on-off, voltage and current values, fluctuation curve, amplitude, noise, etc.

FCT test: It is necessary to burn the IC program, simulate the function of the entire PCBA board, find out the problems in the hardware and software, and be equipped with the necessary SMT production fixtures and test stands.

Aging test: It is mainly to energize the PCBA board and electronic products for a long time, keep them working and observe whether there is any failure. After the aging test, the electronic products can be sold in batches.

Fatigue test: It is mainly to sample the PCBA board, and perform high-frequency and long-term operation of the function, observe whether there is a failure, and judge the probability of failure in the test, so as to feedback the working performance of the PCBA board in the electronic product.