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2021-03-31

Defect 1: Connecting tin

Connecting tin is also called short circuit, which means the solder ball and the solder ball are short-circuited during the soldering process. Two pads are connecting together which causing a short circuit of two BGA board.

★Solution: the factory should adjust the temperature curve, reduce the reflow air pressure, and improves the solder printing quality.

SMT defect - BGA defect | SunzonTech

Defect 2: fake welding

False soldering is also called "Head-in-Pillow (HIP)". There are many reasons for fake soldering:

1. Oxidation of solder balls or PAD.

2. Insufficient temperature in the reflow oven.

3. PCB deformation,

4. Poor solder paste activity

BGA fake welding is characterized by "difficult to find" and "difficult to identify".

SMT defect - BGA defect | SunzonTech

Defect 3: cold welding

Cold soldering is not exactly the same as fake  soldering. Cold soldering is caused by the abnormal reflow temperature. The abnormal temperature will cause the solder paste not melt completely. It may be caused by the temperature not reaching the melting point of the solder paste or insufficient reflow time in the reflow zone.

★Solution: the factory need to adjust the temperature curve and reduce vibration during the cooling process.

 

Short introduction of Panasonic NPM pick and place machine | SunzonTech

Production Line

Message

Shenzhen Sunzon Technology Co., Ltd.
+86 13417069748
+86-755-27307103
sales@sunzontech.com
Building 45, Hengkeng Industrial Zone, Genzhuyuan Community, Matian Street, Guangming District, Shenzhen, China
Philippine Branch:
+63 9178891559
ph-sales01@sunzontech.com

Contact

Shenzhen SunzonTech Co., Ltd

+86 0755 27357103
+86 13417069748
Building 45, Hengkeng Industrial Zone, Genzhuyuan Community, Matian Street, Guangming District, Shenzhen, China

Company

SunzonTech is a leading SMT (surface mount technology) machine supplier and SMT machine manufacturers in China. We have 17 years experienced in SMT machine design, R&D, manufacture and export.

We can also provide professional advice to establish a full SMT production line, as we have a rich of knowledge in the surface mount technology industry