High-quality printed circuit board assemblies manufactured to stringent international quality metrics. Explore our tier-1 product lines below.
Shenzhen STHL is a high-quality provider of electronics manufacturing services (EMS) in China, we serve customers worldwide along the whole industry chain including PCB layout, components sourcing, PCB fabrication, PCBA assembly, cable assembly, box build assembly and comprehensive testing services.
It was established in 2006, with 20 years of experience in electronics contract assembly manufacturing. Currently, STHL has 220+ staff members. Our 10,000 sqm facilities include 7 SMT assembly lines, 2 DIP/THT lines, 2 function testing lines and 2 finished device assembly lines.
At STHL, we provide electronics assembly services for energy power, communications, automotive, medical, consumer electronics, computers & storage, safety & security, commercial and industrial products. Our customers mainly from USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and the other 90 regions of the world.
As an IATF16949, ISO9001, ISO14001,and ISO13485 certificated electronics assembly manufacturer, we produce products exactly comply with RoHS standard and quality guarantee. Based on our excellent engineering and production capacities in technical areas such as materials analysis & storage, advanced equipment, reliability testing (AOI, X-RAY, ICT test and function test), high effective SMT and THT assembly, we are recognized as a long-term reliable PCBA vendor by more and more customers worldwide.
Welcome to visit STHL factory at any time.
We can handle a wide range of advanced components, including:
But our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including AOI and X-Ray inspection, to guarantee flawless assembly.
STHL PCBA also excels in Through-Hole Technology (THT) assembly. Our services encompass:
End-to-end electronic manufacturing capabilities tailored to scale high-complexity hardware solutions.
STHL operates 7 automated PCB assembly lines for both prototype and mass production. Advanced SMT ensures precise component placement and quality. Skilled technicians provide efficient THT assembly and RoHS-compliant lead-free soldering.
STHL PCB fabrication service produces high-quality, reliable printed circuit boards from simple singles to complex multi-layers, from flex PCB to rigid-flex PCB, we use premium materials and controlled processes to meet precise specifications.
STHL offer global electronic component sourcing and supply chain solutions. Our vast supplier network and expertise ensure access to genuine, certified parts, mitigating risks of counterfeits, allocation, and long lead times to secure your production schedule.
With the precision manufacturing of cable assembly components including handles, retention systems, connectors, and shielding in a wide range of materials and finishes, we have performed many successful cable assembly for many customers from various industrial applications.
Making your projects at STHL from SMT assembly to box build assembly is very cost-effective and fast to market. Covering everything from putting a PCBA into the enclosure with all functions testing to a complete product assembly packaged and ready for delivery to your customers, we can supply the full support.
STHL conducts functional testing (FCT) to verify product performance, preventing defects such as circuit issues, missing or incorrect components. This ensures delivered products are stable and fully qualified.
The convergence of industrial automation, smart logistics, and regional manufacturing ecosystems makes China electronics PCB factories the optimal hub for global OEMs.
Working with a localized Chinese PCB assembly factory yields substantial cost efficiencies. With instant access to local tier-1 silicon distributors, passive components markets, and connector manufacturers in Shenzhen, STHL is able to slash Bill of Materials (BOM) costs by 15% to 30% compared to Western manufacturers. This local component sourcing reduces international shipping delays and import tariffs on prototype elements.
Time-to-market is the primary metric for modern hardware product launches. Our New Product Introduction (NPI) workflows leverage high-speed Yamaha and Fuji pick-and-place machines capable of deploying components down to 01005 sizing at massive speeds. Proto-to-production handoffs are managed by dedicated cross-functional engineering teams, turning around high-density PCBs in as little as 24 to 48 hours for engineering validation tests (EVT).
Operating a resilient supply chain means preparing for unforeseen component obsolescence. STHL operates an integrated ERP system that manages part numbers, manufacturer codes, date codes, and trace identifiers. In the event of market component allocations, our global sourcing team coordinates directly with verified authorized global distributors (Mouser, Digi-Key, Arrow) to procure certified components, eliminating counterfeit risk.
By implementing Factory 4.0 paradigms, STHL connects production machinery directly to a central Manufacturing Execution System (MES). From solder paste printer height profiling via SPI (Solder Paste Inspection) to automated optical check algorithms and functional tests, every step registers telemetry data. This connected factory blueprint ensures a repeatable quality process, limiting human error during high-mix, low-volume assembly runs.
As modern consumer electronics and automotive boards trend toward miniaturization, high frequencies, and extreme power densities, our technological roadmap adapts to support these paradigm shifts.
To support high-speed chips, we have integrated microvia technology, laser direct imaging (LDI), and sequential build-up (SBU) processes. Our capability roadmap covers Any-Layer HDI, blind/buried vias, and filled-via-in-pad geometries down to 3 mil line width and spacing, essential for modern AI computing and IoT hardware.
We are expanding production lines for multi-layer rigid-flex printed circuit boards. By combining polyimide flexible materials with traditional FR4 substrates, we eliminate connectors and cabling in space-constrained wearables, medical imaging devices, and high-frequency communication boosters.
With the rise of high-power EV charging infrastructure and solar inversion, we have increased fabrication yields for metal core PCBs (MCPCBs) and heavy copper traces (up to 6 oz). These thermal designs allow rapid heat dissipation in demanding automotive and high-voltage power applications.
Every industry demands custom testing parameters, quality standards, and structural board architectures. STHL aligns production methods to match specific macro vertical sectors.
From vehicle control units (VCU) to advanced driver assistance systems (ADAS) and on-board battery charging infrastructure, STHL designs and constructs boards capable of resisting intense thermal cycles, physical vibrations, and electromagnetic noise. Testing includes 3D solder-paste profiling, X-ray inspection of internal layer alignments, and thermal shock testing.
Medical imaging workstations, surgical display units, and clinical telemetry equipment demand zero-failure operation. We manufacture under rigorous cleanroom conditions and utilize AOI and functional inspection cycles to achieve medical compliance. Traceability protocols assure tracking of every component lot number to its original silicon manufacturer.
Industrial cellular repeaters, high-frequency antenna circuits, solar street light controllers, and smart grid meters operate under aggressive outdoor climates. We leverage specific conformal coating options (silicone, polyurethane, acrylic) to protect the underlying circuitry from high levels of humidity, dust, and salt mist erosion.
Industrial monitoring, deep-well drilling instrumentation, and wastewater analysis nodes require rugged enclosures and dense, multi-layered PCBA configurations. Our engineering team conducts design-for-manufacturability (DFM) reviews to ensure boards withstand chemical exposure, physical shock, and extreme atmospheric pressure shifts.
At STHL, we prioritize quality, environmental responsibility, and international conformance at every stage of the PCB assembly life cycle. Our factory complies with standard and custom inspection checklists designed to secure certification in strict global jurisdictions.
AOI, X-Ray, and FCT Functional Testing Coverage on Multi-layer Assemblies
Procurement directors and electronic hardware designers face major operational friction when contracting overseas PCB factories. Here is how STHL resolves these common bottlenecks:
Friction: Misaligned specifications due to language barriers or slow email turnaround.
Solution: STHL maintains an English-speaking engineering desk available to address customer concerns. Our system registers Gerber files, BOM sheets, and schematic files directly, clarifying design intents via detailed DFM files before assembly.
Friction: High defect rates during field deployment because of insufficient testing.
Solution: STHL enforces functional testing (FCT) along with automatic optical inspection (AOI) and X-ray analysis for advanced BGAs. We build testing rigs to verify the logic and firmware on the boards, minimizing defective outputs.
Friction: Unauthorized cloning of proprietary circuits and board layouts.
Solution: We maintain strict IP protection protocols. Customer designs are stored on secure local networks accessible only to designated engineering staff. We sign comprehensive Non-Disclosure Agreements (NDAs) to protect customer IP.
Discover more specialized PCB assembly products engineered for telecommunication, environmental, and residential applications.
Technical answers regarding PCB assembly capabilities, lead times, quality checks, and shipping logistics.
STHL PCBA
