Testing & Quality Assurance

Quality Control Management

Wonder Tech process under the guidance of the ISO9001 system and IPC-A-610E standard, improves the supply chain management level, and provides customers with high-quality product manufacturing services. We strictly control PCBA board design, DFM inspection, PCBA manufacturing, quality control points in testing and personnel training to form a set of quality management system.

DFM Inspection

• Check the following items of customer design PCB, BOM, schematic diagram, finished product assembly manual: File version and the last update time
• BOM including manufacturer’s brand and part number, description
• Confirm the PCB production process: material, board thickness, copper thickness, number of layers, surface treatment, character color and special process
• Reasonable PCB layer and PCB Panel method
• Provide the correct SMT pick & place file
• Complete burning program and functional testing requirements
• Clear finished product assembly instruction
• Other special process requirements
• Kick-off Meeting for Major Projects
• Organize sales dept, engineering dept, production dept, purchasing dept and quality dept to hold a kick-off meeting:
• Introduce the customer’s project background, product application range, delivery date and special requirements in detail
• Clarify the production batch, production qty and delivery schedule
• Assess the process difficulty and key quality control points of the project
• Clarify the procurement cycle of PCB and electronic components
• Preparation of jigs, fixtures and special materials required in the production process

PCB Production

• We strictly control the following quality key points of PCB fabrication
• High-quality board from reputed printed circuit board suppliers
• Can support electrical test, and we can test based on different requirements of customers.

Procurement Of Electronic components

• 100% purchase according to the brand and material number specified in the customer’s BOM (unless the customer agrees to purchase other alternative materials)
• Purchasing materials through official channels such as agents and traders
• Have advantage of centralized procurement, obtain a shorter procurement cycle, the latest production year, stocking advantages

IQC Incoming Inspection

• PCB: Thickness, vias, pads, silkscreen, warping degree, circuits, soldermask, etc;
• Components: Part-number, and silkscreen of the incoming electronic components are consistent with the BOM
• Randomly check the resistance and capacitance of incoming electronic components, and compare them with the BOM
• Check the surface of incoming electronic components for scratches, deformation, broken or short feet and other appearance defects

Component Storage and Solder Paste Printing

• Store sensitive components in a professional constant temperature and humidity box
• Baking 2-12 hours for some PCB/IC/BGA with strict requirements to enhance solderability
• Using first-line brand solder paste
• Make high-quality steel mesh
• Equipped with a fully automatic solder paste printing machine to ensure the consistency and reliability of solder paste printing in the mass production process

SMT Chip Processing

• Adopt advanced high-speed automatic SMT placement machine, the precision is up to 01005
• Equipped with an electric feeder to reduce the rate of throwing materials and the probability of failure warning
• Support mainstream chip types, such as QFN, SOP, SOT, TSOP, QFP, BGA, PLCC
• Equipped with 10 temperature zone reflow soldering
• Use AOI machine to detect wrong parts, missing parts, reverse, false welding and other defects in batches
• Use X-Ray to inspect BGA chip
• Through-hole (THT) processing
• Strict Standard Operation Procedure (SOP) instructions
• Equipped with 2 plug-in production lines to meet the needs of mass production
• Program Burning & Functional Testing
• We provide various electronic testing services and can make test jigs
• Will follow the testing instruction and remain the test report
• Inspection & Package
• Ultrasonic washer or manual washer of the board surface
• 100% visual inspection before delivery
• PCBA is carefully packaged with anti-static bags and cardboards to prevent damage