source:Other information release time:2023-06-21 Hits: Popular:PCB Assembly company
1. Submit a complete list of solvents and solutions used to the laminate manufacturer, including the processing time and temperature for each step. Analyze whether copper stress and excessive Thermal shock occur in electroplating process.
2. Effectively follow the mechanical processing methods of push storage. Frequent analysis of metallized holes can control this issue.
3. Most solder pads or wires detach due to lax requirements for all operators. If the temperature inspection of the solder groove fails or the residence time in the solder groove is extended, detachment may also occur. In manual tin soldering repair operations, the detachment of the solder pad is likely due to the use of improper wattage ferrochrome and the failure to receive professional process training. Some laminate manufacturers now manufacture laminates with high peel strength levels at high temperatures for strict soldering purposes.
4. If the detachment caused by the design wiring of the printed board occurs in the same place on each board; So this type of printed circuit board must be redesigned. Usually, this does occur at right angles to thick copper foil or wire bends. Sometimes, this phenomenon also occurs with long wires; This is because
Due to different thermal expansion coefficients.
When designing a 5 PCB, if possible, remove heavy components from the entire printed board or install them after immersion welding. Usually, a low wattage soldering iron is used for careful soldering, which results in a shorter duration of heating of the substrate material compared to component immersion soldering.
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