Three Cycles of PCBA Production
There are strict standards for PCBA testing. PCBA production can be roughly divided into three cycles: new product prototype manufacturing, trial production, and mass production.
Prototype Manufacturing of New Products
The inspection of new product prototypes is generally planned in combination with process parameter adjustment, timeliness, economy, and reliability.
(1) Solder paste coating inspection (SPI): use a 2D/3D solder paste tester (3D solder paste tester is preferred) to test all or key solder paste coating points (such as fine-pitch, ultra-fine-pitch devices), and extract and record solder paste parameter values. In the prototype manufacturing stage, a visual inspection can be used instead of SPI inspection equipment in case of a short time.
(2) Flying probe inspection (FP): The production quantity of prototype products is limited and the time requirement is tight, and the flying probe online detector does not need to make needle beds and fixtures, which saves the work and time in this link, and can be directly accepted from the CAD system The PCBA design data automatically generates the corresponding inspection program, which is most suitable for the inspection after assembly and welding.
(3) Function test (FT): The function test is mainly to verify the product design indicators and debug them, and can find problems such as component failure and rationality of electrical principle design.
For the prototype production of products with BGA and flip-chip packaged devices, an X-ray detector should be used to inspect the solder joints or key solder joints of this type of device before flying probe inspection under the condition that the capacity allows ensuring that the solder joints are internally quality.
Trial Production
The main purpose of trial production is to verify the stability of process parameters, and the inspection of prototype product production is fully applicable to the trial production stage.
Mass Production
Mass production can be divided into three categories: large, medium, and small, and the quantity is determined according to customer requirements.
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