/From Prototype to Volume Production/
PCB Assembly Services
PCBSAIL provides complete PCB assembly services for prototypes, pilot builds, and repeat production across demanding electronics applications. Our team handles component sourcing, SMT, through-hole assembly, inspection, testing, programming, and final packaging under one workflow.
Every project begins with an engineering review covering design files, component availability, assembly risks, and testing requirements. You receive practical manufacturing support, clear communication, and production options matched to your schedule and order volume.
SMT and Through-Hole Assembly
Turnkey and Consigned Options
What Is PCB Assembly?
PCB assembly mounts and solders electronic components onto a fabricated board, creating a functional electronic assembly.
A complete service connects sourcing, placement, soldering, inspection, programming, testing, documentation, packaging, and delivery.
PCB Assembly Technology
We combine automated equipment with controlled manual processes for boards containing different packages, technologies, and production requirements.
Our SMT lines place surface-mounted components for compact boards, fine-pitch designs, and repeatable production volumes.
Solder paste inspection and automated optical inspection help identify process defects before boards reach final testing.
Through-hole assembly provides stronger mechanical connections for large components, connectors, transformers, and high-stress electronics.
Available processes include manual insertion, selective soldering, wave soldering, and controlled hand soldering where appropriate.
We provide professional BGA PCB Assembly services for high-density electronic products.
BGA, QFN, and fine-pitch packages require accurate placement, controlled reflow profiles, and suitable inspection methods.
X-ray inspection can verify hidden solder joints and identify voiding, bridging, or insufficient solder connections.
PCB Assembly Services for Different Production Needs
Every electronics project has different sourcing responsibilities, testing requirements, production volumes, and delivery expectations. We offer flexible PCB assembly models, allowing your team to retain control where it matters most.
We specialize in fast-turn prototype PCB assembly services with rapid engineering review and quick production scheduling.
We provide cost-effective low-volume PCB assembly services for small and medium production.
We utilize automated SMT production lines, strict process control, and scalable manufacturing systems to support mass production requirements.
We offer complete turnkey PCB assembly services, managing the entire manufacturing process from PCB fabrication to final assembly and testing.
We offer complete turnkey PCB assembly services, managing the entire manufacturing process from PCB fabrication to final assembly and testing.
We provide completed box build assembly services beyond PCB population. We support full product integration and final system assembly.
We provide completed box build assembly services beyond PCB population. We support full product integration and final system assembly.
We can provide environmentally compliant lead-free PCB assembly services.
Our PCB Assembly Capability
From prototype builds to high-volume production, our in-house PCBA facility supports diverse assembly technologies and component packages.
Capability | Specification | Capability | Specification |
Min. Component Size | 01005~45mm*98mm | Single-Sided Assembly | Available |
Min. Component Pitch | 0.3mm | Double-Sided Assembly | Available |
Max. PCB Size | L510mm*W460mm | Mixed SMT And THT | Available |
Max. Assembly Thickness | 5mm | Prototype Quantity | 1PC |
SMT Placement Accuracy | ±0.015mm | Volume Capacity | 500K+ CPH |
BGA Pitch Capability | 0.25mm | IPC Acceptance Class | IPC-A-610 Class 2/ 3 |
Lead-Free Assembly | Yes | Standard Lead Time | 7 Days |
Leaded Assembly | Yes | Expedited Lead Time | 2 Days |
What Should You Send?
- 1. Gerber or ODB++ fabrication files
- 2. Bill of materials with manufacturer details
- 3. Centroid or component placement data
- 4. Assembly drawings and special instructions
- 5. Testing, programming, and packaging requirements
A Clear Path From Files To Finished Assemblies
Our PCB Assembly Process
We follow a comprehensive and highly controlled PCB Assembly process to ensure manufacturing precision, product reliability, and consistent quality across prototype, low-volume, and mass production projects.
Pre-Assembly Preparation
Our engineering team will do DFM analysis.
- Gerber File Verification
- BOM Review And Validation
- Footprint Compatibility Checking
- Assembly Process Evaluation
- Thermal And Layout Analysis
Component Procurement
We source electronic components through trusted global suppliers and authorized distributors.
- Component Sourcing And Purchasing
- Alternative Component Evaluation
- Incoming Material Inspection (IQC)
- Moisture-Sensitive Component Control
Solder Paste Printing
Solder paste is precisely printed onto PCB pads using high-accuracy stencil printing equipment.
- Laser-Cut Stencil Alignment
- Controlled Solder Paste Deposition
- Print Quality Optimization
SPI
After solder paste printing, 3D SPI systems inspect solder paste deposits to verify volume, height, and alignment accuracy.
- Paste Volume Measurement
- Alignment Verification
- Defect Detection Before Assembly
SMT Assembly
Automated pick-and-place machines mount surface mount components onto the PCB with high precision and speed.
Reflow Soldering
The assembled PCB passes through a multi-zone reflow oven where solder paste melts and forms reliable electrical and mechanical connections.
- Thermal Profile Optimization
- Controlled Heating And Cooling
- Nitrogen Reflow (Optional)
First Sample Testing
Before full production begins, first article samples are inspected and tested to verify assembly accuracy and process stability.
- Visual Inspection
- Dimensional Verification
- Functional Validation
AOI
AOI systems automatically inspect the PCB Assembly for visible defects after SMT soldering.
- Missing Components
- Wrong Polarity
- Solder Bridges
- Misalignment
- Insufficient Solder
Through-Hole Component Soldering
For mixed technology PCB assemblies, through-hole components are inserted and soldered.
- Wave Soldering
- Selective Soldering
- Manual Soldering
X-Ray Inspection
X-Ray inspection is used to verify hidden solder joints that cannot be inspected visually.
Testing
We do electrical and functional testing.
- ICT (In-Circuit Testing)
- Functional Circuit Testing (FCT)
- Flying Probe Testing
Shipping
Before shipment, all PCB assemblies undergo final inspection, cleaning, and ESD-safe packaging.
PCB Assembly Inspection and Testing
Testing requirements vary according to product function, design complexity, production volume, and end-use conditions. We select appropriate inspection and testing methods after reviewing your design and acceptance requirements.
1. Incoming Material Inspection
Incoming inspection verifies component labels, quantities, packaging conditions, moisture sensitivity, and supporting documentation. Potential discrepancies are reported before affected materials move into production.
2. Solder Paste Inspection
SPI measures solder paste position, area, height, and volume before component placement begins. Early detection helps prevent insufficient solder, bridging, open joints, and inconsistent process results.
3. AOI
AOI checks component presence, orientation, placement, solder joints, polarity, and visible assembly defects. Inspection settings are adjusted according to component packages, board design, and agreed acceptance criteria.
4. X-Ray Inspection
X-ray inspection examines hidden solder joints beneath BGA, QFN, and other bottom-terminated packages. It can reveal bridging, voiding, insufficient solder, opens, and alignment problems that optical inspection cannot detect.
5. In-Circuit Testing
ICT can evaluate electrical connections, component values, shorts, opens, and selected circuit functions. Test coverage depends on fixture access, test-point placement, circuit design, and production volume.
6. Functional Testing
Functional testing confirms whether an assembled board performs its intended operations under defined conditions. Customers may provide procedures, fixtures, firmware, software, expected results, and acceptable measurement ranges.
Industries We Have Previously Served
With advanced SMT and Through-Hole Assembly capabilities, strict quality control systems, and flexible production lines, we can offer PCB Assembly solutions from consumer devices to mission-critical industrial and medical systems.
Automotive
We offer PCBA service for Automotive electronics with strict quality standards.
- Automotive ECU Modules
- LED Lighting Control Systems
- Vehicle Communication Modules
- Sensor And Monitoring Systems
- Power Management Electronics
Industrial Automation
Industrial control systems require stable performance, long operational life, and strong resistance to vibration and harsh environments.
- PLC Control Boards
- Industrial Automation Systems
- Motor Control Modules
- Sensor Control Units
- Power Distribution Systems
- HMI Devices
Medical Electronics
Medical electronic devices require highly controlled manufacturing environments, stable quality, and reliable assembly performance.
- Medical Monitoring Devices
- Diagnostic Systems
- Portable Healthcare Equipment
- Imaging System Electronics
- Sensor Control Modules
Consumer Electronics
We support rapid PCB Assembly for a wide range of consumer products.
- Smart Home Devices
- Wearable Electronics
- Audio And Video Systems
- Gaming Peripherals
- Portable Electronic Devices
Telecommunication
Modern communication systems require high-speed signal integrity, precise impedance control, and high-frequency PCB Assembly capability.
- 5G Communication Equipment
- RF Communication Modules
- Networking Switches And Routers
- Wireless Communication Devices
- Fiber Optic Communication Systems
Energy Systems
Power electronics applications require strong solder reliability, thermal management performance, and high-current assembly capability.
- BMS
- Power Supply Control Boards
- Solar Inverter Electronics
- Charging Station Controllers
- Energy Storage Management Systems
Fast Quotation
Our professional sales and engineering teams provide fast PCB quotes and technical support. Simply send us your Gerber files, BOM, and assembly drawings, and we will respond promptly with a competitive solution.
- Gushu Tangxi Second Industrial Zone, Shenzhen
- +86 755 2335 0814
- +86 135 1078 8094
- sales@pcbasail.com
FAQ About PCB Assembly
1. How Much Does PCB Assembly Cost Per Board?
PCB assembly cost depends on board complexity, component count, package types, assembly volume, testing requirements, and sourcing strategy.
For prototype runs, assembly costs often range from $5 to $100+ per board. High-volume production can reduce costs significantly through automation and economies of scale.
Major cost drivers include:
- Number Of SMT Placements
- BGA And Fine-Pitch Components
- Double-Sided Assembly
- Testing Requirements
- Component Procurement
- Lead Time Requirements
2. Can You Assemble Prototype Orders?
Prototype PCB assembly is available for engineering verification, product development, pilot builds, and pre-production testing.
Minimum quantities and lead times depend on component availability, board complexity, testing, and manufacturing requirements.
3. How Long Does PCB Assembly Take?
PCB assembly lead time depends on board fabrication, component availability, order volume, complexity, and testing requirements.
We confirm the production schedule after completing the engineering review and checking the required components.
4. Can You Source Components From Our Approved Manufacturers?
Yes, we can follow approved manufacturer lists and specified part numbers during component procurement.
Any proposed alternative requires customer approval before purchasing or using that component within production.
5. How Do You Protect Customer Design Information?
Confidentiality procedures and nondisclosure agreements can support projects containing proprietary designs or sensitive commercial information.
Specific document controls should be confirmed before customers submit restricted files or controlled technical data.