Maintenance Principle of Finished Circuit Board
2021-08-01
The purpose of testing the soft board in the flexible circuit board factory is to establish a general rule on the appearance and quality of the soft board, and to determine the basis for the appearance and quality of the soft board products to be rejected, which is helpful to improve the manufacturing technology and reduce the waste of resources and environmental pollution caused by unnecessary scrapping. Test methods Test methods with visual, magnifying glass, ruler as the main inspection methods and tools, if necessary, use other applicable testing instruments or equipment for inspection.
Basic test criteria:
1. Appearance of substrate film surface;
2. Appearance of coating;
3. Deviation of connecting plate and covering layer;
4. Flow infiltration of binder and covering coating;
5. The conductor under the covering layer changes color. After the humidity resistance test of temperature 40 ℃, humidity 90% and 96 hours, it must still meet the requirements of voltage resistance, bending resistance, bending resistance and welding resistance;
6. Missing coating of coating layer;
7. Poor combination of electroplating.
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