Explore our high-performance electronic assemblies engineered for critical industries worldwide.
Shenzhen STHL is a premier, high-quality provider of Electronics Manufacturing Services (EMS) in China. We serve a diverse global clientele across the entire hardware lifecycle, offering end-to-end solutions that include PCB layout, component sourcing, PCB fabrication, PCBA assembly, custom cable assembly, box build assembly, and comprehensive functional testing services.
Established in 2006, STHL brings nearly two decades of contract electronics manufacturing experience to the table. Our state-of-the-art 10,000 sqm facility is staffed by over 220 highly skilled professionals and features 7 automated SMT assembly lines, 2 DIP/THT lines, 2 functional testing lines, and 2 dedicated box-build integration lines.
Year Established
Production Facility
High-Speed SMT Lines
Countries Served Globally
Surface Mount Technology (SMT) is the backbone of modern high-density electronics. At STHL, we utilize state-of-the-art placement systems capable of handling the most complex component packages with extreme precision and repeatability.
Our technical capabilities cover a wide spectrum of advanced components:
By combining high-speed placement machines with rigorous thermal profiling and solder paste inspection (SPI), we guarantee defect-free assembly for even the most challenging designs.
While SMT dominates modern designs, Through-Hole Technology remains critical for power electronics, connectors, and components subjected to high mechanical stress. STHL maintains a robust THT department to offer comprehensive hybrid assembly services.
Our THT capabilities include:
Our experienced technicians ensure that every through-hole joint achieves perfect solder fillet rise and mechanical integrity, meeting IPC-A-610 Class 2 and Class 3 standards.
From initial design verification to final box build packaging, we provide a seamless manufacturing experience.
STHL operates 7 automated SMT lines and 2 DIP lines. We handle prototype runs and high-volume production with equal efficiency, ensuring precise placement and optimal solder joints.
We manufacture high-reliability PCBs ranging from simple single-sided boards to complex multi-layer rigid, flexible (FPC), and rigid-flex configurations using premium base laminates.
Our global supply chain network secures genuine, traceable components. We mitigate risks associated with counterfeit parts, long lead times, and market allocations.
Custom wire harness and cable assemblies designed for harsh environments. We manufacture custom connectors, shielding, and strain reliefs for diverse industrial applications.
Complete system integration services. We assemble your PCBA into custom enclosures, integrate displays, route internal cabling, and perform final packaging for direct shipment.
Rigorous Functional Testing (FCT), In-Circuit Testing (ICT), and environmental stress screening to ensure 100% operational reliability before products leave our facility.
Why global OEMs choose Shenzhen STHL for high-reliability flexible circuit manufacturing.
Flexible Printed Circuits (FPCs) require highly specialized raw materials and precise manufacturing processes. By partnering with a Shenzhen-based manufacturer like STHL, global enterprises leverage a unique, highly integrated electronics ecosystem that guarantees speed, cost-efficiency, and technical superiority.
Shenzhen is the global hub for FCCL (Flexible Copper Clad Laminate), polyimide (PI) films, polyester (PET) films, and specialized coverlays. Direct access to top-tier material manufacturers reduces lead times for raw materials from weeks to days, allowing us to pass significant cost savings to our clients.
The proximity of tooling shops, laser drilling specialists, and surface finish chemical suppliers allows STHL to complete complex FPC prototypes in as little as 3 to 5 days. This accelerated design cycle helps OEMs beat competitors to market.
Our facility features state-of-the-art roll-to-roll processing equipment, high-precision UV laser drilling machines, and automated optical inspection (AOI) systems. This advanced infrastructure ensures tight tolerance control on trace widths and spacing down to 50μm.
Whether you require a low-volume run of 100 prototype units or high-volume mass production of 1,000,000+ units, our flexible manufacturing lines adapt to your demand fluctuations without compromising on quality or delivery schedules.
Meeting the stringent compliance standards of international buyers and critical industries.
Global procurement teams in the automotive, medical, and aerospace sectors require more than just low prices; they demand absolute reliability, traceability, and strict compliance with international quality standards. STHL is structured to meet these rigorous demands seamlessly.
Our quality management framework is built upon four pillars of international certification:
To support global logistics, STHL offers flexible shipping terms (FOB, CIF, DDP, EXW) and maintains partnerships with major international freight forwarders. We provide full traceability for all sourced components, offering Certificate of Conformance (CoC), material test reports, and component date code tracking.
Our engineering team conducts comprehensive Design for Manufacturing (DFM) and Design for Testing (DFT) reviews before production begins, identifying potential yield issues early in the cycle to save time and cost.
How FPCs and Rigid-Flex boards enable innovation across diverse modern industries.
In smartwatches, fitness trackers, and smartphones, space is at a premium. Flexible PCBs allow circuits to fold and fit into ultra-thin enclosures, routing signals around batteries and mechanical components without bulky connectors.
Modern vehicles rely on FPCs for battery management systems (BMS) in electric vehicles, ADAS radar modules, LED headlights, and dashboard displays. Flexible circuits reduce vehicle weight and improve reliability by eliminating wire harnesses.
From portable ultrasound equipment to implantable pacemakers and medical imaging workstations, flexible PCBs provide the high-density routing and bio-compatible material options required for critical medical electronics.
Staying ahead of the technology curve with advanced materials and manufacturing techniques.
The flexible electronics market is evolving rapidly, driven by the demand for smaller, lighter, and more functional devices. STHL continuously invests in R&D to support these emerging industry trends:
As microprocessors and sensors shrink, the demand for High-Density Interconnect (HDI) flexible circuits grows. We are developing capabilities to support trace widths and spacing below 30μm, utilizing advanced modified polyimide (MPI) and liquid crystal polymer (LCP) materials for high-frequency applications.
Rigid-flex boards combine the best of both worlds: the structural stability of rigid FR4 boards and the space-saving flexibility of FPCs. This integration eliminates connectors, reduces assembly time, and significantly improves signal integrity in compact IoT devices.
5G and future 6G communications require materials with low dielectric constant (Dk) and low dissipation factor (Df). STHL utilizes specialized LCP laminates to ensure minimal signal loss and high thermal stability for high-frequency antenna modules.
Environmental responsibility is a core focus. We are expanding our use of halogen-free base materials, lead-free surface finishes, and energy-efficient manufacturing processes to help our clients meet their corporate sustainability goals.
Expert answers to common questions about flexible circuit board design, manufacturing, and sourcing.
Our diverse manufacturing capabilities support advanced industrial, medical, and consumer applications.
STHL PCBA
