Premium OEM assemblies manufactured to rigid aerospace, medical, and high-reliability industrial specifications.
Shenzhen STHL stands as 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.
Harnessing automated component placement, precision optical inspection, and rigorous chemical/material quality control.
We can handle a wide range of advanced components, including:
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including AOI and X-Ray inspection, to guarantee flawless assembly across every single prototype run.
STHL PCBA also excels in Through-Hole Technology (THT) assembly. Our services encompass:
Unlocking next-generation performance through material science, dense space integration, and architectural innovation.
Modern flexible PCBs are rapidly adopting high-density interconnect (HDI) structures with micro-vias less than 75μm. Sourcing polyimide films down to 12.5μm thickness permits unprecedented mechanical bending radii while maintaining trace integrity in wearables.
The industry is transitioning from adhesive-based flexible copper clad laminates (FCCL) to adhesiveless polyimide films. This offers superior thermal resistance, improved signal integrity for high-frequency RF applications, and enhanced reliability in dynamic bending configurations.
Consolidating rigid boards with dynamic flex sections eliminates mechanical connectors and hand-soldered wiring looms. This minimizes structural weight, controls trace impedance across high-speed data planes, and substantially improves overall physical shock resistance.
Providing custom industrial engineering support from component sourcing to finished box builds.
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 offers 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.
Procuring custom flexible printed circuits goes beyond simple pricing matrices. Corporate procurement engineers demand structural and process reliability, traceability, and robust material chains. Key criteria evaluated include:
Through our established global distribution network, STHL safeguards engineering projects from initial design verification down to final shipping validation.
Our engineering services scale across several major technical fields:
Providing custom robust flex cables for High-Voltage Battery Management Systems, sensor routing, and interior infotainment controls conforming to automotive vibration profiles.
Producing bio-compatible, ultra-thin flexible circuits for patient monitoring nodes, digital ECG arrays, and advanced portable ultrasound imaging equipment.
Delivering multi-layered flexible interconnect solutions for power quality analyzers, smart home control hubs, and heavy-duty industrial MCU units.
Securing cross-border shipments with robust engineering verifications and localized operations.
Our dedicated customer support division coordinates across multiple time zones (covering North America, Europe, and Asia-Pacific). This ensures design questions and DFM feedback are addressed within 1 working day.
Our quality assurance includes cross-sectional micro-section analysis, thermal shock chambers, custom solderability tests, peeling force validation, and comprehensive automated optical/X-ray verification.
We work with international logistics providers to coordinate shipping and customs clearing, delivering vacuum-sealed, moisture-barrier ESD packaging direct to your loading dock.
Looking toward high-frequency materials, ecological substrates, and hybrid manufacturing technologies.
As standard FR4 materials hit performance limitations in high-frequency 5G/6G communication equipment, flexible circuits are adopting Liquid Crystal Polymer (LCP) and Fluoropolymer (PTFE) materials. These low-loss substrates yield a dissipation factor (Df) below 0.0015, ensuring clear signal transmission in high-speed, high-density environments.
Additionally, modern manufacturers are working to implement additive manufacturing technologies to minimize environmental footprints. By shifting from traditional subtractive chemical etching processes to printed additive copper circuits, raw material waste is reduced, and finer trace widths down to 15μm can be achieved.
STHL maintains a focus on these developing processes, continually updating our assembly techniques, SMT machines, and reflow ovens to handle advanced substrates and delicate components.
Answers to common technical, design, and manufacturing questions for flexible circuit prototypes.
Depending on layer count and trace complexity, rapid prototyping requires 5 to 7 working days. Once the engineering designs (DFM) are confirmed, prototype runs can be expedited in our dedicated quick-turn SMT facility.
We use advanced dielectric modeling software to calculate trace width and spacing parameters relative to the copper thickness. We also employ cross-hatch ground planes to maintain flexible routing channels while ensuring proper EMI shielding and signal impedance control.
Yes. We regularly produce rigid-flex stackups combining multiple rigid circuit segments and inner flexible polyimide layers. We utilize high-temperature lamination alongside laser-drilled blind and buried vias to connect the layers.
We offer selective bonding of FR4, Polyimide (PI), Stainless Steel, and Aluminum stiffeners. These are applied using either pressure-sensitive adhesives (PSA) or thermosetting adhesives to provide support under SMT components or connector termination zones.
We operate a strict supplier registration protocol, procuring directly from original manufacturers or authorized global distributors. Every incoming batch is inspected, barcoded, and stored in our ESD-safe, climate-controlled warehouse.
Yes, our manufacturing and inspection lines conform strictly to IPC-A-610 Class 2 and Class 3 specifications. This ensures our prototypes meet the quality standards required for automotive, aerospace, and medical applications.
Explore our complete manufacturing portfolio, from small smart home hubs to complex medical devices.
STHL PCBA
