Fabbricazione PCB di precisione, PCB ad alta frequenza, PCB ad alta velocità, PCB standard, PCB multistrato e assemblaggio PCB.
La fabbrica di servizi personalizzati PCB e PCBA più affidabile.
What aspects of PCBA patch processing need to pay attention to
The production process of PCBA involves a series of processes such as PCB board manufacturing, approvvigionamento e ispezione di componenti elettronici forniti da pcba, SMT chip production and processing, produzione e trasformazione di plug-in, program firing, prova, and aging. La catena di fornitura e la catena di produzione sono lunghe. Defects in the other stage will cause the PCBA board to fail in mass quality and cause serious consequences. Per una situazione del genere, the quality control of PCBA patch processing is a very important quality assurance in electronic processing, Quindi quali sono le chiavi per il controllo di qualità della lavorazione PCBA?
It is extremely important to hold a pre-production meeting after receiving the PCBA patch production and processing order. It is mainly to conduct process analysis on PCBGerber files and submit manufacturability reports (DFM) according to different customer needs. Many small manufacturers do not pay attention to this, ma tendono a tendere verso questo. Not only is it prone to poor quality problems caused by poor PCB design, ma anche un sacco di rilavorazioni e lavori di riparazione.
2. Purchase and inspection of electronic components supplied by PCBA
It is necessary to strictly control the procurement channels of electronic components, and must obtain goods from large traders and original manufacturers, in modo da evitare l'uso di materiali di seconda mano e di materiali contraffatti. Inoltre, è necessario istituire una speciale Materiale in entrata PCBAinspection post to strictly inspect the following items to ensure that the components are fault-free.
PCB: Controllare la prova di temperatura del forno di riflusso, whether the fly-line vias are blocked or leaking, se la superficie della tavola è piegata, ecc.
IC: Check whether the screen printing is exactly the same as the BOM, e conservarlo a temperatura e umidità costanti.
Other commonly used materials: check screen printing, aspetto, power measurement, ecc.
3. SMT assembly
Solder paste printing and reflow oven temperature control system are the key points of assembly, and laser stencils that have higher quality requirements and can better meet the requirements of production and processing are required. Secondo i requisiti del PCB, some steel mesh holes or U-shaped holes need to be added or reduced, La rete e l'acciaio possono essere fatti secondo i requisiti di processo. Among them, Il controllo della temperatura del forno a riflusso è molto importante per l'bagnatura della pasta di saldatura e la fermezza della maglia d'acciaio, and can be adjusted according to the normal SOP operation guide.
In addition, strict implementation of the AOI test can greatly reduce the defects caused by human factors.
4. Plug-in production and processing
In the plug-in process, Il design dello stampo per la saldatura ad onda è la chiave. How to use the mold to maximize the yield rate is a process that PE engineers must continue to practice and summarize.
5. PCBA patch production and processing board test
For orders with PCBA test requirements, the key test content includes ICT (circuit test), FCT (functional test), burn test (aging test), temperature and humidity test, prova di caduta, etc.
