Portwell’s Board Production Flow is engineered to deliver stable, repeatable, and high-precision results across every SMT and PCB assembly stage. The process begins with Raw Material Inspection, where incoming components are validated against warehouse packing lists and stored in controlled WIP conditions to maintain full traceability. Material Baking removes moisture from SMD devices that cannot tolerate high temperatures, preventing heat-related defects during reflow.
During Solder Paste Printing, solder paste is precisely deposited through the stencil onto PCB pads, followed by AOI – Soldering Paste, where automated inspection identifies insufficient paste, bridging tendencies, and stencil irregularities—ensuring a strong first-pass yield before component placement.
In the Chips Mounting stage, high-speed placement equipment accurately positions resistors, capacitors, and ICs to support high-precision PCB assembly. This is followed by Visual Inspection, performed using standardized procedures and diagram-guided checkpoints to reduce inspection variation.
Reflow Soldering then forms reliable solder joints through a controlled heat-cycle system. After reflow, Visual Inspection & Repair detects solder-related anomalies using magnified examination and corrects issues before electrical validation.
Through In-Circuit Testing (ICT), the PCB assembly undergoes automated electrical verification for shorts, opens, incorrect components, and assembly defects across resistors, capacitors, inductors, transistor devices, SCR and TRIAC. The system also records testing statistics to support process optimization and quality improvement.
Finally, IPQC inspects boards according to IPC-610D standards, ensuring BOM and ECO compliance before releasing defect-free output.
With this structured SMT workflow, Portwell delivers high-quality, industrial-grade PCBs optimized for reliability and long-term application performance.
Materials in the production line are prepared based on the packing list provided by the warehouse staff and are stored in the WIP buffer area.
Material Baking The SMD components tend to be thin, hence, can't endure high temperature.
Solder Paste PrintingA stencil plate is used to print the soldering paste thru the plate holes onto the PCB.
AOI - Soldering PasteOne-hundred percent automatic inspection of the PCB after solder paste printing detects defects and improves quality the first time.
Chips MountingHigh Speed Mounting pertains to different tiny components such as resistors, capacitors and ICs. This is a widely used procedure to achieve high precision production.
Visual InspectionVisual inspection stations are equipped with computers with Standard Operating Procedures (SOP) for each product. The SOPs are composed of diagrams which allow our technicians to run their inspection effortlessly and efficiently.
Reflow SolderingReflow utilization uses an internal heat cycle system which allows the soldered components on the PCB to be soldered after cooling.
Visual Inspection & RepairOur visual technicians utilize magnifying glass examination to check for material flaws that causes undesirable tendency.
In-Circuit Testing (ICT)The ICT automated test system can check the assembly circuit wafer, short circuits, abruptions, resistors, capacitors, inductor components values, as well as diode, transistor, FET, SCR, TRIAC, IC for anomallies. Upon completion, reports regarding production and statistics aid in identifying errors in the production process and ensure product quality.
IPQCOur IPQC personnel examine all products according to the IPC-610D magnifying glass standards to determine and confirmed ECO, BOM and assure the production contents are without defects.
For a deeper understanding of our manufacturing technologies, engineering workflows, and industry-specific know-how, we welcome you to contact our team.
Portwell provides comprehensive insights into advanced system/board production, AIoT integration, and smart manufacturing deployment—along with successful real-world implementation cases across industrial applications.
Our experts are ready to support your next project with professional guidance and technical consultation.
