PCBA Tech - What are the requirements of PCBA processing for surface mount devices

What are the requirements of PCBA processing for surface mount devices
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1. Definition of coplanarity: The maximum deviation obtained by comparing the other pins with the plane formed by the three lowest pins of the part as the reference plane.

2. The coplanarity requirement of PCBA processing surface mount devices is less than 0.10mm.

3. For uBGA/CSP with a pin pitch (Pitch) less than 1.0mm in PCBA processing, the coplanarity must be less than 0.10mm, and the coplanarity of other BGAs must be less than 0.15mm.

4. For surface mount connectors with a pin pitch (Pitch) less than 0.5mm in PCBA processing, the coplanarity requirement is less than 0.05mm, and the coplanarity requirement for other surface mount connectors is less than 0.12mm.

5. The coplanarity of the bottom surface and solder end of LCCC, QFN, and BCC packages must be less than 0.10mm.

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