The processing of medical device PCBA must strictly follow high reliability and compliance standards to ensure the long-term stable operation of the equipment in life-threatening scenarios.

Core precautions

High precision and high stability requirements
Medical equipment is extremely sensitive to signal accuracy and system stability. SMT surface mount must be controlled with an accuracy of ± 0.03mm to avoid issues such as component offset, virtual soldering, or soldering, and to prevent signal abnormalities during long-term operation.

The quality of solder joints takes priority over appearance
Solder joints not only need to have a qualified appearance, but also require reliable internal connections. Hidden defects such as cold welding and virtual welding may not be detected during initial testing, but they pose a risk of failure in clinical use. Suggest using 3D X-Ray to detect hidden solder joints such as BGA.

Full process traceability system
Each PCBA should have a unique UDI traceability code that records the entire process from material batch, process parameters to testing data, meeting regulatory audit requirements such as FDA and NMPA. Lack of traceability system will result in audit failure or ineffective delivery.

Static Electricity and Environmental Control
ESD electrostatic discharge may damage core components such as ICs and BGAs. The production environment must comply with the ANSI/ESD S20.20 standard, be equipped with cleanrooms of 10000/100000 levels, and implement electrostatic protection measures throughout the process.

Material closed-loop management
Key components (such as sensors and medical grade chips) must come from the original factory or a first level agent, undergo 100% incoming inspection (IQC), and eliminate loose and counterfeit materials. Moisture sensitive components need to be stored against moisture to prevent the "popcorn" effect during reflux.

DFM pre review
During the design phase, a medical exclusive DFM (Design for Manufacturability) review is required, focusing on the layout of fine pitch components, impedance control, three proof coating areas, and testability design to avoid a sharp drop in yield during mass production.

Meets medical certification standards
The processing factory should pass the ISO 13485 medical device quality management system certification and have auxiliary certifications such as ISO 9001 and IATF 16949 to ensure controllable quality throughout the entire process.

Avoid common processing defects

Tin bead control: Implement "zero tolerance" standards in high-density areas to prevent electrical short circuits.
Surface pollution: Keep the production environment clean, avoid oil stains and chemical residues that affect welding reliability.
Pad stripping: Control the soldering temperature and frequency to prevent damage to the PCB substrate.