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Conventional inspection methods for printed circuit boards
2021-10-03
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Author:Kavie

The circuit board factory tells you the conventional inspection methods of printed circuit boards

 

(1) First, the circuit board factory conducts dimensional inspection on the circuit board during production

 

In circuit board factories or other circuit board factories, dimensional inspection includes mechanical measurement and instrumental measurement, generally sampling inspection. Mechanical measurement uses measuring tools that are suitable for measuring range and reading accuracy. For f, there are vernier calipers, micrometers, plug gauges, precision long gauges, etc. Instrument thickness gauge and reading microscope, etc. For the dedicated thickness gauge for forging layer thickness of precious metals, the copper thickness and the size of the inner layer structure can be measured by a reading microscope through microsectioning. Microsectioning refers to the preparation of samples for metallographic inspection of an object, including section cutting, potting, grinding, polishing, etching, and dyeing.

 

(2) Mechanical inspection

 

According to the experience of the circuit board factory, a peeling tester and a tensile tester will be used to determine the peeling strength of the conductors on the printed board sample and the pull-off strength of the connection plate. Our circuit board factory is very strict in the inspection and control of this piece.

 

(3) Electrical performance inspection

 

The circuit integrity of the printed board refers to the open circuit and short circuit inspection. The circuit inspection machine usually makes every board be inspected. Only in this way can we ensure the product quality of our circuit board factory, and use suitable testing equipment for insulation resistance, withstand voltage, impedance, etc., such as high resistance meters, withstand voltage meters, and impedance testers. These are only sampling inspections.

 

The circuit board factory tells you the conventional inspection methods of printed circuit boards

 

(4) Environmental communication and other inspections

 

The same is true for environmental inspections, and random inspections are carried out according to the specified cycle or batch. In recent years, the circuit board factory has strictly controlled the environment. The equipment for inspection includes electric oven, humid box, high and low temperature box, soldering tank, hot water tank and drying oven, etc.


The above is an introduction to the conventional inspection methods of printed circuit boards. Ipcb is also provided to PCB manufacturers and PCB manufacturing technology