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.
Year Established
Modern Facility Space
Specialized Professionals
Export Regions Worldwide
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 Automated Optical Inspection (AOI) and 3D X-Ray inspection, to guarantee flawless assembly across high-density multilayered systems.
STHL PCBA also excels in Through-Hole Technology (THT) assembly. Our robust THT capabilities encompass:
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 assemblies 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 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.
In modern electronics design, the evolution of high-speed, high-density, and highly compact systems demands a shift toward multilayer PCBs (often ranging from 4 to 32+ layers). Designers face complex tasks, including trace routing density management, signal attenuation, impedance consistency, and thermal dissipation control. High-reliability applications, such as medical life-support systems, industrial edge servers, and aerospace telecommunications, rely heavily on multilayer configurations to guarantee stable electromagnetic interference (EMI) shielding and optimized electrical performance.
Key technological drivers reshaping the multilayer PCB sector include:
OEM procurement departments face challenges with component obsolescence, counterfeit components, and fluctuating raw material costs (e.g., copper foil, epoxy resin, fiberglass). STHL addresses these supply chain bottlenecks by integrating a global procurement matrix. Our partnerships with authorized distributors (such as Arrow, Avnet, DigiKey, and Mouser) guarantee component traceability. This compliance is essential for critical products like medical systems under ISO 13485 or automotive modules under IATF 16949.
For high-reliability flight displays (PFD), STHL provides rigid-flex multilayer PCBs designed to withstand extreme thermal cycling and vibrations. Utilizing underfill compounds and ruggedized conformal coatings, our assemblies deliver failure-free operations in critical flight systems.
Handling sub-GHz and high-frequency communication modules requires strict impedance-controlled stack-ups. We utilize state-of-the-art flying probe testers and time-domain reflectometry (TDR) to guarantee signal path consistency across multi-layer RF layouts.
From solar inverter control boards to wind turbine controller units, we manufacture thick copper multilayer assemblies designed to handle high current loads. We combine these with high-voltage testing capabilities to prevent electrical breakdown.
Operating a global supply chain requires adherence to regional standards and compliance frameworks. STHL provides comprehensive localized engineering support to adapt designs to standard manufacturing panels (DFM - Design for Manufacturability), saving cost and avoiding field returns.
Our multilingual customer support and technical engineering teams coordinate directly with clients in North America, Western Europe, and Asia-Pacific. This alignment helps bridge timezone gaps, speed up Gerber data clarification, and accelerate prototype iteration cycles.
To ensure a smooth transition from prototype design to volume production, we run every layout through our comprehensive DFM check list:
As high-performance computing, AI-driven edge hardware, and 5G/6G infrastructures expand, the physical boundaries of PCB fabrication are pushed to new limits. Our technical roadmap highlights our focus on meeting these demands.
Implementation of Modified Semi-Additive Processes (mSAP) to achieve fine-pitch trace widths and spacings below 25 microns for next-gen mobile and wearable modules.
Embedding active and passive elements directly within the inner layers of the multilayer board, minimizing footprint size, parasitic inductance, and thermal resistance.
Integrating machine learning models into AOI and 3D X-Ray systems to run real-time defect analysis, enhancing yield rates for complex multi-layer arrays.
STHL PCBA
