Explore our diverse portfolio of double-sided printed circuit board assemblies customized for mission-critical industrial, medical, and power control applications.
Why double-sided circuits remain the workhorse of modern embedded hardware design, bridging cost efficiency with design density.
In the hierarchy of printed electronic circuitry, the Double-Sided PCB (DS-PCB) serves as a critical evolutionary baseline. Unlike single-sided variants which isolate copper tracks to one face, double-sided substrates employ top and bottom traces interconnected through Plated Through-Holes (PTH). This architecture immediately doubles the routing density available to design engineers, facilitating compact routing configurations, cross-talk mitigation, and the layout of highly complex IC packages like QFPs and SOICs.
Today's global supply chains leverage double-sided layouts across high-volume commercial markets and demanding industrial environments. As electronic systems miniaturize, the need for robust thermal control and electrical stability becomes paramount. Utilizing precision materials such as high-Tg FR-4, CEM-3, and advanced dielectric prepregs, STHL provides optimal double-sided solutions that sustain structural integrity under continuous thermal stress.
How China's end-to-end supply chain ecosystem empowers STHL to deliver precision and cost-efficiencies directly to your bottom line.
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.
Bridging ultra-fine pitch surface mount tech with heavy-duty through-hole mounting for complete double-sided reliability.
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:
Leveraging state-of-the-art systems and strict quality gates to manage your projects from prototype design to full-scale distribution.
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 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.
Aligning high-precision double-sided circuit capabilities with target operational environments worldwide.
Whether working within medical regulatory structures or specialized power grids, double-sided PCBs require unique configuration characteristics:
Sourcing hardware across long distances requires systematic risk management protocols. OEMs and EMS buyers look beyond unit costs, prioritizing lead-time assurance, counterfeit component prevention, and strict standards compliance.
By conducting integrated electrical checks, ICT (In-Circuit Testing), and continuous AOI audits directly on the assembly floor, we eliminate quality variance before products depart our facility. This aligns with Google's Quality Guidelines regarding operational trust and reliable manufacturing expertise.
How miniaturization, material innovation, and smart factories are shifting the design paradigm of dual-layer boards.
As IoT and smart sensors expand, double-sided designs are forced to accommodate smaller, higher-pinout configurations. Active tracks are shifting down to 3mil/3mil trace widths with microvias replacing standard mechanical drilling to accommodate high-density footprints.
Global environmental mandates are driving the transition toward halogen-free materials and lead-free surface finishes (such as high-yield ENIG or Organic Solderability Preservatives). Our production processes are engineered around RoHS-compliance to support clean green-tech initiatives.
Integration of MES (Manufacturing Execution Systems) allows real-time tracing of oven reflow parameters and SMT placement speeds. This data logging provides transparent quality validation reports for high-reliability medical and defense hardware.
Expert insights resolving core engineering questions about double-sided PCB layout, fabrication, and assembly services.
Advanced electronic assemblies manufactured under IPC class specifications for defense, security, and battery control systems.
STHL PCBA
