PCBA / SMT Assembly Capabilities

Professional turnkey PCB assembly backed by 15+ years of experience — from prototype to medium and high-volume production.

One-Stop Electronic Manufacturing

Sunking is your ideal partner for high-quality, medium and high-volume electronic manufacturing. We offer traditional PCB assembly and Surface Mount (SMT) assembly, plus finishing processes including conformal coating and silicone potting. We also provide supply chain management, procurement, custom packaging, and develop in-circuit and functional test equipment for all our products.

SMT Assembly Specifications

Precision assembly parameters validated across our SMT production lines.

Min. Assembly Space0.1mm
Min. QFP Space0.3mm
Min. Package0201
Min. Board Size50×50mm
Max. Board Size350×1200mm
Assembly Registration±0.01mm
Printing Precision±0.025mm
Repeat Accuracy±0.01mm
SMT Precision±0.05mm (μ+3σ) / ±0.03mm (3σ)

Component Types & Packages

Package Types

QFPQFNSOPPGAPLCCBGA

Chip Component Sizes

12060805060304020201

Our PCBA Services

High-quality SMT & THT production
OEM & ODM manufacturing
Component procurement & BOM management
Selective coating, conformal varnishing & potting
Laser marking, DMX-Code, labels
Sample production & complex testing for the development cycle
PCBA firmware burning
ICT & FCT & aging test
Packaging concepts & design
100% optical and functional testing

Quality Assurance & Traceability

Barcode Traceability

All circuit board assemblies are barcoded and tracked through every manufacturing step, with data analyzed at each stage to continually improve the process.

First Article Inspection

A rigorous first article inspection is performed on each build, complemented by a robust NPI procedure for new products.

In-Process Inspection

A series of inspections throughout the assembly process ensures product quality, reliability and functionality, reducing field failures.

Assembly Equipment

EquipmentModelSpecification
Solder Paste PrinterDESEN DSP-1008Board 50×50–400×340mm
SPI InspectionSinic-Tek I350aBoard 50×50–400×350mm
SMT PlacementYAMAHA YS240402~32×32mm, 120 types/8mm
SMT PlacementYAMAHA YG12F / YG120402~45×100mm
Reflow OvenHeller 1809 / 1826Board 50–560mm
Reflow OvenVitronics FLEX XPM-2Board 50–560mm
AOI InspectionMVTE MT-200025×25~368×488mm
X-Ray InspectionSEAMARK ZM-X7800Resolution 12μm

Ready to assemble your boards?

Upload your BOM and Gerber files for a turnkey PCBA quote.

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