FR-4 Standard
Standard rigid PCB substrate for general applications.
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PCB Fabrication and Assembly Services for Custom Electronics
Zenbot China reviews PCB fabrication, component sourcing, SMT and through-hole assembly, inspection and testing needs for custom electronics. Preparing files for a quote? See our PCB assembly file checklist.
Capabilities
Process capability overview
| Process | Capability | Maximum size | Typical lead time |
|---|---|---|---|
| PCB Fabrication | 1–32 layers | 500 × 500 mm panel | 48 hours–5 days |
| SMT Assembly | Down to 0201 components | 400 × 300 mm panel | 3–5 days |
| THT Assembly | Manual / wave soldering | Project-dependent | Typically +1–2 days |
| Functional Testing | Custom test fixtures | Project-dependent | Project-dependent |
Indicative capabilities only. Layer count, component size, panel dimensions and lead time are confirmed after engineering review.
Materials
Available materials
FR-4 High-Tg
Higher thermal resistance for demanding operating environments.
Aluminum (MCPCB)
Metal-core boards for LED and power electronics applications.
RF Laminates
High-frequency laminate options for RF and microwave designs.
Flex & Rigid-Flex
Polyimide-based constructions for flexible and folding assemblies.
ENIG / HASL Finish
Common surface finish options supporting solderability and shelf life.
Material grade, laminate brand, stack-up and surface finish availability are confirmed during engineering review.
Surface finishes
Finishing options
- ENIG (gold)
- HASL / Lead-free HASL
- OSP
- Immersion silver
- Conformal coating
- Protective coating
Finish chemistry, thickness and coating requirements are confirmed during engineering review.
Design for manufacturing
Pad & footprint design
Confirm land patterns, polarity and solderability requirements against the approved component data.
Panelization requirements
Define V-score or tab-routing, tooling features and rail requirements during DFM review.
Silkscreen clearance
Keep reference text and markings clear of pads, exposed copper and critical component areas.
Component placement
Provide practical spacing for automated assembly, inspection, rework and test access.
Applications
Industries we serve
- IoT & Smart Devices
- Consumer Electronics
- Industrial Controls
- Wearables
- Telecommunications
- Robotics
Project suitability, regulatory needs and verification scope are confirmed during engineering review.
Featured work
Recent PCBA Service projects
Sensor control board
4-layer FR-4, full turnkey with BOM sourcing
Wearable fitness tracker
Rigid-flex PCB, ENIG finish, SMT assembly.
Industrial power module
Aluminum MCPCB, THT assembly, burn-in tested
FAQ
Common questions
Can you source components for me?
Yes. Share your BOM and approved sourcing requirements; alternatives for constrained parts are proposed for your review before use.
What testing do you offer?
Inspection plans may include AOI, X-ray for applicable packages, and functional testing when requirements and fixtures are agreed.
Do you support small prototype runs?
Prototype and production quantities can be reviewed. Minimum order quantity and production route are confirmed for each project.
Cross-sell
Pair it with another process
Other Services
Add enclosure assembly and final product integration to your project scope.
Explore Other Services →Sheet Metal Fabrication
Pair your board with a custom metal enclosure or supporting hardware.
Explore Sheet Metal Fabrication →3D Printing
Prototype an enclosure or fixture to evaluate fit before production.
Explore 3D Printing →