PCB test content
The purpose of PCB testing and inspection is to check the performance of the PCB against standard printed circuit boards. To ensure that all PCB manufacturing processes are functioning properly and without any defects according to the project specifications.
A PCB consists of different elements, components, each of which affects the overall performance of the electronic circuit. A detailed analysis of these elements is performed to ensure PCB quality. The tests to be performed should include the following checks.
Lamination: The quality of lamination is critical to the life of the PCB. Laminate peeling can directly lead to problems with board function. Typically, laminate testing is used to test the resistance of the laminate to peeling by force or heat.
Hole wall quality: Hole walls are typically analyzed in environments with cycling and rapid temperature changes to understand how they react to thermal effects. Ensure that the hole walls do not crack or delaminate when the PCB is put into service.
Copper plating: Copper foil is applied to the printed circuit board to provide electrical conductivity. The quality of the copper is tested and analyzed in detail for tensile strength and elongation.
Cleanliness: The cleanliness of a printed circuit board is a measure of the board’s ability to withstand environmental factors such as weather resistance, corrosion and humidity.
Solderability: Solderability tests are performed on materials to ensure that components can be safely attached to the board and to prevent solder defects in the final product.
Electrical Testing: Electrical conductivity is critical to any PCB, as is the ability to measure the minimum leakage current of the PCB.
Cleanliness: The cleanliness of a printed circuit board is a test of the board’s ability to resist environmental factors such as corrosion and moisture.
Environmental testing: This is a test of the performance and quality changes of a PCB operating in a humid environment. Weight comparisons are usually made before and after the PCB is placed in a humid environment, and if the weight changes significantly, it is considered scrap.