Causes of board foaming during PCBA assembly

- Feb 22, 2019-

In the process of PCBA assembling, the blistering of PCB surface is caused by the poor adhesion of PCB surface, that is, the surface quality of PCBA surface, which includes two aspects: the cleanliness of PCBA surface and the surface roughness (or surface energy). Basically, all board surface blistering problems on PCB can be summarized as two reasons.

PCBA assembly

The poor or too low bonding force between coatings is due to the difficulty in resisting the coating stress, mechanical stress and thermal stress during the subsequent production and processing and PCBA assembly process, which results in different degrees of separation between coatings.

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