To achieve functional operation, a PCB board alone is not sufficient. It requires the assembly of components and plug-ins to enable soldering. This step-by-step process is known as PCBA. Let’s explore the four key stages in the PCBA process:
- SMT (Surface Mount Technology) Assembly:
- SMT assembly involves procuring components based on the provided BOM (Bill of Materials) and establishing the production schedule (PMC plan).
- After the preparatory work, SMT programming is done, followed by laser stencil fabrication and solder paste printing according to the SMT process.
- Components are mounted onto the PCB using SMT placement machines, with optional automated optical inspection (AOI) for quality assurance.
- After inspection, the PCBs pass through a reflow oven to ensure proper soldering.
- IPQC (In-Process Quality Control) checks are conducted before proceeding to DIP (Dual In-line Package) insertion, wave soldering, and post-reflow processes.
- Finally, QA performs comprehensive testing to ensure product quality.
- DIP Assembly:
- DIP assembly involves the insertion of components, wave soldering, lead trimming, post-soldering processing, board cleaning, and inspection.
- PCBA Testing:
- PCBA testing is a crucial quality control step in the entire PCBA process. It follows the testing plan provided by the customer (Test Plan) to test the test points on the PCB.
- PCBA testing includes ICT (In-Circuit Testing), FCT (Functional Circuit Testing), aging testing, fatigue testing, and testing under harsh environmental conditions.
- Finished Product Assembly:
- Tested OK PCBA boards are assembled into enclosures, tested again, and then prepared for shipment.
PCBA manufacturing is an interconnected process, and any issues in any important stage can significantly affect overall product quality. Therefore, strict control is essential for each process.
The Silman Tech DEZ-C758 fully automatic PCBA cleaning machine is mainly used for cleaning PCB boards with single-sided solder joints, coated products, and high-end precision products in industries such as aviation, medical, and new energy vehicles. It effectively cleans organic and inorganic pollutants, such as flux residues, from DIP/THT PCBA boards after soldering.