PCB Circuit Board Production Into Products Need to go Through the 7 Major Testing
A. PCB Circuit Board Testing Needs to Be Through The LCR Measurement
LCR measurement is suitable for some simple circuit boards, circuit boards with fewer components, no integrated circuits, only some passive components of the circuit board, the end of the patch does not need to go back to the furnace, the direct use of the LCR components on the circuit board for measurement, and the BOM on the components of the rated value of the comparison, there is no anomaly when you can start formal production.
B. PCB Circuit Board Testing FAI First Piece Test
FAI first piece of test system, usually by a set of FAI software led by the integration of the LCR bridge composition, the product BOM and Gerber can be imported into the FAI system, the staff use their own fixtures to measure the first sample board components, the system will be checked with the input of CAD data, the test process software through the graphics or voice show the results, to reduce the negligence of the personnel to find the misdiagnosis occurred because of the staff The system can save labor costs.
C. PCB Circuit Board Testing AOI Test
OI test, this test method is very common in pcba processing, applicable to all pcba processing, mainly through the shape of the components to determine the components of the welding problem can also be through the color of the components, IC screen printing on the check to determine whether there is a problem of components on the circuit board wrong pieces.
D. PCB Circuit Board Inspection Flying Probe Test
Flying probe test, flying probe test is usually used in the development of some of the nature of the small batch production when used, which is characterized by the convenience of testing, program variability, good versatility, basically can test all types of circuit boards, but the test efficiency is relatively low, each piece of the board will be a very long time to test the test time, mainly through the measurement of the resistance between the two fixed points of the size of the circuit board to determine the total number of components whether the existence of a short, empty weld, wrong pieces of the problem. Short-circuit, empty welding, wrong pieces of the problem.
E. PCB Circuit Board Testing X-RAY Inspection
X-RAY inspection, for some of the installation of hidden solder joints, such as BGA, CSP, QFN package components of the circuit board, the production of the first piece of the need for X-ray inspection, X-rays have a strong penetration, is most early used in a variety of inspection occasions a kind of instrument, X-ray fluoroscopy can show the thickness of the welded joints, the shape and quality of the weld, the density of solder. These specific indicators can fully reflect the soldering quality of the solder joints, including open circuits, short circuits, holes, internal bubbles and the amount of tin is insufficient, and can do quantitative analysis.
F. PCB Circuit Board Testing ICT Test
ICT test, ICT test is usually used for mass production of the machine type, high test efficiency, manufacturing costs are relatively large, each model of circuit boards require special fixtures, fixtures are not very long service life, test costs are relatively high, the principle of the test and flying probe test is almost the same, but also through the measurement of resistance between the two fixed points to determine whether the components on the circuit is there a short-circuit, empty weld, the wrong piece and so on. Phenomenon
G. PCB Circuit Board Testing FCT Function Test
FCT function test, FCT function test is usually used in some of the more complex circuit boards, the need to test the circuit board must be soldered after the completion of the circuit board through a number of specific fixtures, simulate the real use of the circuit board scene, the circuit board in this simulated scene, turn on the power to observe the circuit board can be used normally, this test method can be very accurate to determine whether the circuit board is This test method can accurately determine whether the circuit board is normal.
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