Explore our industrial-grade PCBA services tailored for medical, automotive, power generation, and specialized electronics industries.
Established in 2006, Shenzhen STHL Electronics has grown into a leading contract electronics manufacturing services (EMS) partner in China. Backed by 20 years of precision engineering experience, we support international clients across the complete electronic lifecycle. Our capabilities span PCB layout, raw components sourcing, high-density multilayer fabrication, surface-mount technology (SMT) assembly, through-hole (THT) insertion, custom wire-harness integration, dynamic box build systems, and systematic validation protocols.
From our state-of-the-art 10,000 sqm production facility in Shenzhen, we coordinate 220+ highly qualified professionals. The floor layout is engineered for maximum throughput and includes 7 SMT lines, 2 automated DIP/THT lines, 2 specialized functional testing stations, and 2 dedicated box-build/final integration lines. We manage advanced high-density builds, low-volume prototypes, and massive scale production runs for global partners.
Modern surface mount technologies demand unparalleled precision, robust process control, and advanced machinery. At STHL, our SMT configuration is fully customized to place fine-pitch parts, microscopic components, and multi-tier chip packages. Our pick-and-place lines process components down to 01005 footprints, ultra-fine-pitch Ball Grid Arrays (BGA/uBGA), Chip-Scale Packaging (CSP), Quad Flat No-leads (QFN), high-lead QFP, and intricate Package-on-Package (PoP) setups.
We deploy critical AOI (Automated Optical Inspection) and 3D X-Ray Inspection systems. These systems verify solder paste density, component alignment, ball coplanarity, and potential voiding profiles within BGA structures, ensuring 100% assembly reliability.
Our environmental controls regulate temperature and relative humidity across assembly phases. Solder paste printing thickness is tracked via SPI (Solder Paste Inspection), matching the thermal profiles of our multizone nitrogen-reflow systems. This eliminates cold jointing, component tombstoning, and voiding.
Despite the rise of surface mount components, through-hole assembly remains essential for power electronics, high-vibration systems, heavy industrial components, and durable connectors. STHL provides combined SMT and THT services, utilizing dual wave-soldering machines and selective soldering equipment to support hybrid layouts.
Unlocking geographical speed, technical agility, and reliable supply lanes to build high-performance electronics.
Located in the world's most advanced electronics cluster. Direct access to high-quality raw materials, copper-clad laminates, substrate bases, and components minimizes turnaround times.
Our supply chain database predicts component life cycles, highlighting end-of-life (EOL) risks early. We suggest drop-in replacements to prevent production shutdowns.
We work exclusively with authorized factory-direct channels and premium global distributors. Standard verification tests are performed to ensure all integrated parts are 100% original.
A breakdown of our manufacturing tolerances, layer configurations, and structural boundaries.
| Feature Parameter | SMT Capability Limits | THT & Mechanical Limits |
|---|---|---|
| Layer Count Range | 1 to 32 Layers (High Density Interconnect - HDI) | Rigid, Flexible, and Rigid-Flex Multilayers |
| Min. Passives Envelope | 01005 (0.4mm × 0.2mm chips) | Not applicable (SMD specific) |
| Fine Pitch Limits | BGA pitch ≥ 0.35mm; Lead pitch ≥ 0.3mm | Hole size tolerance ±0.05mm |
| Max Board Envelope | 610mm × 508mm | Up to 1200mm (Specialized LED Strip configurations) |
| Board Thickness Limits | 0.4mm to 6.0mm | Standard and Heavy Copper boards (up to 6 oz) |
| Component Heights | Max SMT height: 25mm | Wave & Selective Soldering clearances adjusted case-by-case |
| Quality Certifications | IATF 16949, ISO 13485 (Medical), ISO 9001:2015, ISO 14001, RoHS, REACH compliant | |
Our core capabilities range from single PCBA board production to complex box-build systems ready for distribution.
Operating 7 automated SMT lines and 2 THT lines. We deliver high-yield component placement for prototypes and high-volume runs. Lead-free wave soldering ensures RoHS-compliant results.
From simple rigid PCBs to complex multilayer, flexible, and rigid-flex configurations. We construct robust substrates using premium laminates to meet exact impedance requirements.
Global logistics capabilities backed by a secure partner network. We manage component sourcing to prevent counterfeit issues and minimize lead times during parts allocations.
High-reliability wire harness fabrication featuring custom connectors, retention locks, screening foils, and tailored insulation to resist stress in harsh industrial applications.
Complete mechanical integration. We install your assembled PCBs into custom metal or plastic enclosures, route wiring harnesses, and package the final products for direct shipping.
Comprehensive quality inspections. We use custom test fixtures, bed-of-nails assemblies, and simulated firmware runs to identify defects before products leave the factory floor.
Deploying specialized electronics engineered to perform in demanding medical, automotive, power generation, and industrial environments.
Distributed control systems, power converters, off-grid storage controllers, and inverter modules. These assemblies are built to withstand continuous heat cycles and current loads using thermal vias and high-Tg substrate configurations.
Under-the-hood systems, Advanced Driver Assistance Systems (ADAS) controllers, sensor boards, and infotainment units. Our production process complies with IATF 16949 standards, ensuring performance under high temperatures and vibrations.
ISO 13485 compliant systems, including smart glucose monitors, air quality sensors, and diagnostic devices. Traceability systems track every component batch back to its raw material source.
Smart voice assistants, webcams, smart lighting, and high-frequency Bluetooth audio devices. We optimize these designs for compact enclosures using HDI stackups and high-density packaging.
Adapting our manufacturing processes to meet the demands of next-generation high-frequency, ultra-compact, and smart hardware designs.
The electronics industry is moving toward high-frequency signals, compact designs, and smart integrated features. To support these advances, STHL is expanding its capabilities in Embedded Passive Components (EPC) and High-Density Interconnect (HDI) technologies. By using micro-vias, filled structures, and blind/buried via systems, we help our partners optimize high-speed signal pathways and minimize signal degradation.
We are also expanding our production capacity for flexible and rigid-flex PCBs. As modern wearable electronics, medical implants, and automotive systems demand flexible form factors, we are standardizing advanced polyimide chemistry configurations and rigid-to-flex transition structures. This ensures long-term flex cycles and reliable mechanical joints.
We are upgrading our processes to handle high-frequency materials, including Rogers, Taconic, and Nelco laminates. These substrates are essential for 5G telecommunication networks, radar systems, and autonomous ADAS platforms.
For international procurement teams, communicating across time zones and managing remote audits can be challenging. STHL provides dedicated project managers who deliver real-time progress updates, clear technical feedback, and comprehensive engineering support.
We welcome pre-assessment site visits, third-party quality inspections, and detailed process audits from our global clients. Our facility is open to customer audits, giving you complete visibility into our materials storage, assembly steps, testing rooms, and QA verification logs.
A closer look at our work in medical monitors, driver assistance systems, communication setups, and utility electronics.
Get answers to common questions about our technical capabilities, quality control processes, and international shipping options.
STHL PCBA