Reliable PCB Fabrication Manufacturer & High-Precision PCB Assembly Services
Factory-direct PCB fabrication and assembly services.
🎁 Special Offer: Claim your FREE 2-4 Layer Prototypes (Zero NRE Fee) today!
Free 2-4 Layer Prototypes
Fast quotation & quick response
SMT / THT / mixed assembly
Global shipping & export experience
Services & Capabilities
10+ years of in-house manufacturing — from bare-board fabrication to full turnkey assembly, all under one roof.
Standard PCBs
2-4 layer FR4 prototypes free for new partners — same factory handles 1 pc to 100k+ volume.
Quote Now- 0 – 24 Layers
- Same Day – 5 Day Turn Time
- 1 – 100k+ Quantity
- FR-4, Aluminum, Copper Base
Flex & Rigid Flex
In-house lamination up to 4X HDI cycles for wearables, medical, and space-constrained designs.
Quote Now- Standard Flex: 1-6 Layers
- Rigid Flex: 4-22 Layers
- Stiffener: FR4, PI, Alu, Steel
- Rigid Flex HDI Lam Cycles: Up to 4X
RF & Microwave
Rogers & hybrid material press for radar, 5G, and IoT RF front-end applications.
Quote Now- Material: Rogers
- Radar, Amplifier, IOTs…
- Hybrid Material Press
- Hard Gold, ENIG, ENEPIG
Advanced PCBs
Up to 56 layers, IPC Class 3 — HDI, heavy copper, and custom stack-ups on demand.
Quote Now- 0 – 60 Layers
- IPC 3, ML, Medical
- HDI, Heavy Copper, Oversize, Mini Size, Special Stack-up
- Custom Materials, R&D
Prototype PCB Assembly
start from 1 piece, 5-day delivery, free DFM review included.
Quote Now- 1 – 1000+ Quantity
- 5 Day Turn Time
- No Minimum Volume
- Leaded / RoHS / No-Clean Solder
Turnkey PCB Assembly
Full or partial turn-key — we handle fab, sourcing & assembly end-to-end.
Quote Now- Full Turn-key: We Handle All Process
- Partial: You Provide Certain Components
- Consigned / Kitted Assembly
Box Build Assembly
PCBA to finished product — enclosure, functional test & ship-ready packaging.
Quote Now- PCBA Assembly
- System Level Assembly
- Programming & Testing
- Packaging & Labeling
Parts Sourcing
Authorized-channel procurement — full BOM or partial, real-time stock verification.
Quote Now- Buying From Manufacturers
- Quality First Approach
- Cost Efficient Global Sourcing
- Rapid Response and Delivery
PCB & PCBA Solutions for Real Purchasing Challenges
We understand the difficulties buyers face when sourcing PCB fabrication and assembly services. Our approach directly addresses these pain points with practical solutions.
Slow quotation and unclear specifications
Engineering-supported fast response for both PCB and PCBA
Our technical team provides detailed quotations within hours — including stack-up proposals, material recommendations, and assembly specs — with transparent timelines for every stage.
Get the certainty you need for accurate project planning and budget control
Inconsistent quality from fabrication to assembly
Stable production control & delivery planning
From bare-board AOI and impedance testing to PCBA X-ray inspection — rigorous process controls at every stage ensure consistent quality across batches.
Protect your product reputation and reduce costly rework or returns
Material & component sourcing risks
Clear material and BOM management with approved changes only
Transparent sourcing for both laminate materials and electronic components. No unauthorized substitutions on board materials or BOM parts — every change requires your explicit approval.
Maintain compliance and eliminate unexpected surprises
Experience the difference of a reliable PCB manufacturing partner
Discuss Your Project NeedsWho We Are
QueenEMS is a leading PCB fabrication manufacturer and assembly expert in China. This means you work directly with the production team—no intermediaries, no markup layers, and clear communication throughout your project.
Our customers come from North America, Europe, and Asia, working with us for reliable assembly and long-term cooperation. We've built our reputation on engineering support, transparent processes, and consistent quality that helps international buyers reduce risk and meet their deadlines.
Factory-Direct Benefits
Direct factory access means faster response times, competitive pricing, and the ability to customize processes for your specific requirements. You get the flexibility of a dedicated partner with the capacity of an established manufacturer.
Partner with a factory that understands global B2B requirements
Learn More About QueenEMSTrusted by Global Electronics Brands
See why engineers and procurement managers worldwide trust our stable PCB assembly quality and quick manufacturing processes.
PCB Assembly Capabilities by Application
Our PCB assembly solutions support a wide range of electronic products across industries—from industrial controls to consumer devices.
Industrial Electronics
Robust assembly for industrial control systems, automation equipment, and manufacturing devices requiring long-term reliability.
Control Boards
Precision assembly for specialized control boards and functional circuits powering motor controllers and smart systems.
Consumer Electronics
Quality assembly for consumer products and commercial equipment balancing cost-effectiveness with reliable performance.
Low to Mid-Volume
Flexible production capabilities for projects ranging from prototypes to mid-volume runs, supporting your growth.
Advanced Assembly Capabilities
High-Density Assembly
AOI Inspection
X-ray Inspection
Functional Testing
Fast Turnaround
Quality Certified
Find out how we can support your specific application
Talk to Our Engineering TeamHow We Deliver Your PCB & PCBA Projects
From bare-board fabrication to finished assembly — a transparent, engineering-driven workflow that keeps you informed and your project on schedule at every stage.
— PCB Fabrication —
Gerber & Spec Review
Upload your Gerber files and stack-up requirements. Our engineers perform a free DFM check and confirm material, layer count, and impedance specs within hours.
Inner Layer Imaging
Circuit patterns are transferred onto copper-clad laminates using LDI exposure. Every inner layer passes AOI verification against your original Gerber data.
Lamination & Drilling
Layers are bonded under vacuum press with precise temperature profiles. CNC drilling creates through-holes and micro-vias down to 0.075 mm with ±0.025 mm accuracy.
Plating & Etching
Copper electroplating builds up hole walls and outer traces. Chemical etching defines final circuit patterns, followed by solder mask and surface finish application.
E-Test & Shipping
100% flying probe electrical testing confirms continuity and isolation. Boards are vacuum-sealed with desiccant and shipped via DHL/FedEx with full traceability documentation.
— PCB Assembly —
PCB & BOM Submission
Upload your Gerber files and bill of materials through our secure portal. Our system automatically validates your files and flags any potential issues.
Engineering Review
Our engineering team performs DFM analysis, reviews your BOM for component availability, and provides a detailed quotation within 2 hours.
PCB Assembly & Testing
Production begins with component sourcing, followed by SMT/THT assembly, AOI inspection, and functional testing according to your specifications.
Delivery & Support
Assembled boards are carefully packaged and shipped with full documentation. Our team remains available for after-sales technical support.
Ready to start your project?
Get Free QuoteQuality Control in PCB Fabrication & Assembly
Quality is built into every step — from raw laminate incoming inspection and inner-layer imaging verification through to final PCBA functional testing — giving you confidence that your products will perform reliably in the field.
— PCB Fabrication —
Incoming Material Inspection
Every laminate, prepreg, and copper foil batch is verified against supplier CoC, Tg rating, and dielectric specs before entering the production line — rejecting substandard material at the gate.
Inner Layer AOI
High-resolution automated optical inspection scans every inner-layer etched trace against Gerber data, catching opens, shorts, and width deviations before lamination locks them inside the stack-up.
Impedance & Cross-Section
TDR impedance testing on coupon strips ensures ±5% tolerance for high-speed designs. Micro-section analysis verifies copper thickness, hole wall plating, and dielectric uniformity on every lot.
Flying Probe & E-Test
100% electrical continuity and isolation testing on every bare board via flying probe or bed-of-nails fixtures — ensuring zero open/short defects ship to your assembly line.
— PCB Assembly —
AOI Inspection
Automated optical inspection detects solder defects, component placement errors, and surface anomalies immediately after assembly, reducing rework costs and production delays.
X-ray Inspection
X-ray technology reveals hidden solder joints under BGA components and complex packages, catching defects that visual inspection cannot detect and preventing field failures.
Functional Testing
Custom test fixtures verify that your assembled boards perform according to specifications, catching functional issues before shipment and protecting your brand reputation.
Process Traceability
Complete documentation tracks materials, processes, and test results for every batch, enabling rapid root cause analysis and continuous improvement of assembly quality.
Learn more about our quality assurance processes
View Quality CertificationsPrecision PCB Fabrication Capabilities
A comprehensive technical reference covering board dimensions, drilling capabilities, copper weight options, and industry certifications — the data your engineering team needs to qualify us as a supplier.
| Layer Count | 1 – 32 Layers |
| Max Board Size | 580 × 1050 mm (22.8" × 41.3") |
| Board Thickness | 0.2 mm – 6.0 mm |
| Thickness Tolerance (≥1.0mm) | ±10% |
| Thickness Tolerance (<1.0mm) | ±0.05 mm |
| Aspect Ratio (Hole:Board) | Up to 12:1 |
Supports both standard rectangular panels and irregular outlines with V-scoring, tab-routing, and stamp-hole breakaway designs for your panelization needs.
| Min Mechanical Drill | 0.15 mm (6 mil) |
| Min Laser Drill (Micro-via) | 0.075 mm (3 mil) |
| Max Mechanical Drill | 6.5 mm |
| Drill Position Accuracy | ±0.025 mm |
| Via Types Supported | Through / Blind / Buried / Stacked |
| Back Drill Capability | Yes (Stub ≤ 0.2 mm) |
Our CNC fleet includes Hitachi and Schmoll machines with automatic tool breakage detection, providing consistent micro-via quality across high-volume HDI production runs.
| Inner Layer Copper | 0.5 oz – 6 oz (17 µm – 210 µm) |
| Outer Layer Copper | 0.5 oz – 10 oz (17 µm – 350 µm) |
| Finished Copper in PTH | ≥ 20 µm (IPC Class 2) / ≥ 25 µm (Class 3) |
| Min Annular Ring | 3 mil (0.075 mm) |
| Copper Thickness Tolerance | ±10% (base) / ±20% (plated) |
Heavy copper boards (≥3 oz) undergo specialized etching and lamination processes to maintain trace fidelity and prevent undercutting on your high-current power designs.
| Solder Mask Colors | Green, Black, Blue, Red, White, Matte |
| Min Solder Mask Bridge | 3 mil (0.075 mm) |
| Solder Mask Type | LPI (Liquid Photo-Imageable) |
| Silkscreen Colors | White, Black, Yellow |
| Min Silkscreen Line Width | 4 mil (0.1 mm) |
We use Taiyo ink systems with LDI exposure for ultra-fine solder mask registration, critical for fine-pitch BGA and QFN pad openings on your high-density layouts.
Quality System
| ISO 9001:2015 | ✓ Certified |
| ISO 14001:2015 | ✓ Certified |
| IATF 16949 | ✓ Automotive |
Product Safety
| UL Listing | ✓ E-File |
| RoHS / REACH | ✓ Compliant |
| Halogen-Free | ✓ Available |
Process Standard
| IPC-A-600 Class 2/3 | ✓ Accepted |
| IPC-6012 Class 2/3 | ✓ Accepted |
| IPC-TM-650 | ✓ Testing |
All certifications are maintained through annual third-party audits. We provide full material traceability (CoC, RoHS reports, UL yellow cards) with every production shipment upon request.
Standard & Expedited Lead Times
Reliable delivery schedules tailored to your project's layer count and volume requirements.
| LAYER COUNT | VOLUME (SQ.M) | TIME (DAYS) | EXPEDITED (HOURS) |
|---|---|---|---|
| Double-sided (2L) | < 1 | 5 | 15 |
| 1 ~ 5 | 7 | ||
| > 5 | 8 | ||
| 4 Layers | < 1 | 5 | 24 |
| 1 ~ 5 | 7 | ||
| > 5 | 12 | ||
| 6 - 8 Layers | < 1 | 6 | 36 |
| 1 ~ 5 | 9 | ||
| > 5 | 12 | ||
| 10 Layers | < 1 | 10 | 60 |
| 1 ~ 5 | 10 | ||
| > 5 | 15 | ||
| > 10 Layers | < 1 | 10 | 72 |
| 1 ~ 5 | 10 | ||
| > 5 | 15 |
Engineering Support for PCB & PCBA Projects
Our engineering team supports projects from PCB stack-up design and impedance planning through PCBA production—helping you avoid costly mistakes, optimize manufacturability, and achieve reliable results on schedule.
DFM / DFA Review
Pre-production design analysis identifies potential fabrication and assembly issues — from trace/space violations and stack-up risks to component placement concerns — and prevents delays before production starts.
BOM & Material Risk Analysis
Proactive review flags laminate lead times, obsolete components, and availability risks across both bare-board materials and BOM parts, giving you time to make informed decisions before production starts.
Transparent Communication
Clear, direct communication throughout the assembly process keeps you informed, eliminates confusion, and ensures expectations align with production reality.
Approved Substitutions Only
No unauthorized changes — whether component substitutions or laminate/surface finish alternatives, every change requires your explicit approval, protecting your product performance and eliminating unwelcome surprises.
Get engineering support for your next project
Talk to Our Engineering TeamPCB Assembly Production Floor
Our in-house PCB assembly lines include SMT placement, manual assembly, inspection, and testing processes—delivering stable quality and consistent output that meets your production deadlines batch after batch.
SMT Placement Lines
High-speed automated surface mount technology lines ensure precise component placement, reducing errors and accelerating your production timeline while maintaining consistent quality standards.
Manual Assembly Stations
Skilled technicians handle through-hole components and specialized assembly tasks, providing the flexibility needed for complex boards and mixed-technology projects.
Inspection & Testing
Comprehensive AOI, X-ray inspection, and functional testing catch defects early, protecting your investment and ensuring every board performs to specification before shipment.
See how our production capabilities can serve your project
Schedule a Factory TourThe QueenEMS Advantage
Delivering high-quality electronic manufacturing services with speed and precision.
100% Quality Guaranteed
Every board passes strict IPC standards and multi-stage AOI/X-Ray inspections.
Fast Turnaround
Expedited options available. Prototype assembly in as fast as 24-48 hours.
Cost Effective
Factory-direct pricing with no hidden fees and transparent BOM quotes.
Engineering Support
Free DFM check and experienced engineering assistance from day one.
PCB Assembly FAQ
Common questions about MOQ, lead time, turnkey PCBA, component sourcing, and quality control answered clearly and transparently.
Have more questions about our PCB assembly services?
Contact Our TeamPCB Assembly Knowledge & Insights
Our blog shares practical insights on PCB assembly sourcing, quality control, BOM management, and risk reduction—helping you make better decisions and achieve more successful outcomes.
How to Reduce PCB Assembly Costs
Discover practical ways to optimize your BOM and manufacturing process without compromising quality.
Read More
Understanding PCB Surface Finishes
A comprehensive comparison between ENIG, HASL, OSP and their best use cases in electronics.
Read More
DFM Best Practices for Rigid-Flex
Avoid common design mistakes when working with rigid-flex boards to ensure manufacturing success.
Read More
New AOI Equipment Installation
We recently upgraded our production line with state-of-the-art 3D AOI inspection systems.
Read MoreExplore more PCB assembly insights and guides
Visit Our Knowledge CenterTell Us About Your PCB/PCBA Project
Get a customized quote within 24 hours. Our team is ready to help you find the perfect solution for your needs
Email Us
[email protected]
Response within 12 hours
Call / WhatsApp
+86-0755-363091328
Mon - Sat, 9AM-6PM CST
Visit Our Factory
1-4/F Property Office Building, ZhengFeng North Road, Shenzhen, China. 518103
Upload Gerber/Bom File
Zip / Rar format, max 50MB
Drag & drop or browse files