PCB FABRICATION, ASSEMBLY & ENGINEERING SUPPORTTina@4PCBA.com

FABRICATION · ASSEMBLY · ENGINEERING REVIEW

PCB Manufacturer
in China. Prototype to production.

PCB Manufacturer in China connects your design with PCB fabrication and assembly options for prototypes, low-volume builds and production. Explore rigid, flex, rigid-flex and HDI boards, then bring your files, quantities and test requirements together for a project-specific engineering review.

Rigid boards up to 56 layers. Components down to 01005.
Your design defines the final specification.

INSIDE THE BUILDFIG. 01

Illustrated circuit board with copper traces, components and layered construction

CONNECTIONS BEGIN WITH CLARITYCircuit illustration
01 / FROM BOARD FILES TO A BUILD PLANRIGID · FLEX · HDI · TURNKEY ASSEMBLY

KEY FACTS AT A GLANCE

From a simple board.
To a complex build.

Start with the available fabrication and assembly scope. Engineering review confirms the combination of layers, materials, features and testing that fits your design, quantity and delivery requirements.

01 / Services
Fabrication & assembly
02 / Rigid PCB
1–56 layers
03 / Flex PCB
1–12 layers
04 / Rigid-flex PCB
2–32 layers
05 / Materials
FR-4, high-Tg & polyimide
06 / Assembly scope
SMT & through-hole
07 / Project volume
Prototype to production
08 / Lead time & MOQ
Confirmed with your RFQ

Capability limits depend on the selected construction and cannot be assumed to apply together. Review the full capability scope ↗

BEFORE THE NUMBERS

A useful estimate
starts with
a complete brief.

Price and delivery depend on the design and the supplier’s confirmed process. Gather the inputs below before comparing quotations. Avoid treating an unexplained online number as a production commitment.

Prepare your RFQ

PROJECT INPUT CHECKLIST
01

The board

Dimensions, layers, stack-up, material, thickness and finish.

02

The build

Quantity breaks, assembly scope, component list and test requirements.

03

The destination

Ship-to location, delivery terms and the date you need the boards.

Confirm price and schedule with a project-specific quotation.

PCB MANUFACTURING & ASSEMBLY SERVICES

The right construction.
A coordinated build.

Choose bare-board fabrication, assembly or a combined project scope. Align materials, fabrication drawings, component sourcing and acceptance requirements before the first build, so the production package remains clear as quantities grow.

01

Prototype & multilayer

Rigid PCB options include standard FR-4, high-Tg and halogen-free materials. Share your stack-up and impedance targets for review before releasing the fabrication data.

Explore manufacturing

02

HDI & fine features

Laser microvias, stacked or staggered structures and via-in-pad options support dense routing. Define the build-up and copper requirements together during design review.

Review HDI options

03

Flex & rigid-flex

Combine flexible connections with the structure your product needs. Include bend zones, stiffeners, mechanical drawings and installation conditions in the engineering package.

Explore flexible boards

04

PCB assembly

Turnkey and consigned assembly options cover surface-mount and through-hole components. Define sourcing permissions, placement data, inspection coverage and functional test requirements with your BOM.

Explore PCB assembly

MANUFACTURING CAPABILITIES

More possibilities.
A specification
built around you.

Use this capability overview to start the technical discussion. The final build specification is confirmed after DFM review of your board data, material, copper, via structure and assembly package.

Minimum feature sizes and maximum copper weights describe different process conditions. Do not combine every listed limit into one design rule; request written confirmation for the exact construction you intend to order.

See the complete scope

Available project scope · subject to engineering confirmation
Capability Overview
Rigid PCB 1–56 layers
Flexible PCB 1–12 layers
Rigid-flex PCB 2–32 layers
Line / space Down to 3 / 3 mil
Copper weight Up to 12 oz
HDI microvias Laser-drilled vias down to 0.1 mm
HDI build-up 1+N+1 through 4+N+4
Small components Down to 01005
BGA pitch Down to 0.2 mm
Inspection & testing SPI, AOI, X-ray, ICT & functional test

LOOK AT THE WHOLE DECISION

Why consider PCB
manufacturing in China?

Start with project fit: the supplier’s relevant board experience, technical communication, quality evidence and total delivered cost. Compare an actual quotation against your own requirements before drawing conclusions about value.

Explore the options

Review how different businesses describe their processes. For example, this PCB fabrication and assembly website is one external starting point for your research. Verify any capability directly with the provider.

Keep trade-offs visible

Put engineering support, shipping, incoming inspection and rework responsibility beside the quoted board price. An incomplete comparison can hide the cost of a mismatched process.

Verify before ordering

Request documents for the legal entity and manufacturing site involved in your order. Agree on data handling, change approval and acceptance criteria before releasing production files.

MATCH THE MODEL TO THE PROJECT

Which type of PCB manufacturer
in China fits your project?

Supplier categories are a useful first filter, not a ranking. Assess the actual business against the same design, quantities and acceptance criteria.

Questions to compare different supplier models
Supplier model A useful starting point for Questions to resolve
01 Online ordering platform Standardized designs and defined ordering workflows Which design rules, options and engineering support apply?
02 Custom fabrication supplier Projects needing a detailed technical discussion Who performs the review and where will the boards be built?
03 Volume-focused manufacturer Programs with repeat builds and a qualification process What qualification, capacity and commercial commitments are required?

DUE DILIGENCE, MADE PRACTICAL

Six checks.
A clearer
supplier picture.

Use the same evidence checklist for every candidate. Keep dated documents and the supplier’s written answers with your project record so the decision can be reviewed by engineering and purchasing together.

Explore quality requirements

  1. Verify the business

    Confirm the legal entity, address and whether the seller manufactures directly or sources elsewhere.

  2. Match the process

    Request design-specific feedback and examples relevant to your board construction.

  3. Inspect the evidence

    Check certificate scope, issuing body, validity and the site covered by each document.

  4. Agree on acceptance

    Record inspection criteria, test coverage and what happens if a delivery does not conform.

  5. Validate a sample

    Define a first-build review that reflects your application and the risks in the design.

  6. Document the agreement

    Confirm pricing scope, delivery terms, data handling and approval of future changes.

QUALITY CONTROL & TEST PLANNING

Inspect the process.
Verify the result.

Define quality requirements before production. A project inspection plan can combine bare-board checks, assembly inspection and product testing, with acceptance criteria and records agreed in the quotation.

Bare-board checks

Include design review, visual inspection and electrical connectivity testing in the fabrication discussion. Specify any impedance measurements, dimensional records or material documentation your product needs.

Assembly inspection

Available methods include solder-paste inspection, automated optical inspection and X-ray. Select the coverage for the package mix and solder joints in your design, then agree on reporting and acceptance.

Product testing

In-circuit and functional testing need a defined test strategy. Supply test points, fixtures, firmware and pass/fail limits as applicable; confirm ownership of test development and approval of the final coverage.

For certification-dependent projects, request current documents for the legal entity, manufacturing site and scope required by your program. Review quality requirements ↗

FROM GERBER FILES TO DELIVERY

One clear plan.
From files to finished boards.

Define the scope at each handoff: engineering review, fabrication, assembly, inspection and delivery. The project schedule starts with approved files, confirmed materials and component availability; each order needs its own timeline.

  1. 01

    Files & DFM

    Submit Gerbers, drawings and specifications. Add the BOM and placement file for assembly, then resolve manufacturability questions.

  2. 02

    Quote & approval

    Review PCB fabrication and assembly services, then confirm the quoted scope, approved revision, sourcing permissions and acceptance requirements.

  3. 03

    Fabrication

    The approved construction guides imaging, drilling, plating, solder mask and surface finish, followed by bare-board checks.

  4. 04

    Assembly

    Components are placed and soldered to the approved assembly package. Document substitutions and obtain approval before changes.

  5. 05

    Inspection & test

    Complete the agreed inspection and test plan. Review results against documented criteria before release.

  6. 06

    Pack & deliver

    Confirm packaging, labels, shipment records and delivery terms. Retain build records for incoming inspection and repeat orders.

BEYOND THE UNIT PRICE

Compare the cost
at your door.

Keep the supplier’s quotation separate from freight, insurance, customs clearance and destination charges. Confirm the delivery terms and responsibility for each cost before comparing offers.

Import charges and classification depend on the goods and destination. Check current official information or obtain a customs specialist’s advice for your shipment; a generic PCB example cannot determine your liability.

YOUR LANDED-COST WORKSHEET

The full picture

  • Board & assembly quotation01
  • Freight & insurance02
  • Destination charges03
  • Inspection & handling04
Comparable delivered cost

Use current, shipment-specific amounts.

START WITH THE APPLICATION

Different products.
Different priorities.

The end application determines what to discuss with a supplier. These are planning topics, not a claim of qualification for a regulated industry.

Industrial control

Environment, continuity and service life

Connected devices

RF requirements and integration

Consumer electronics

Space, assembly and repeatability

Medical technology

Traceability and qualification scope

Mobility

Reliability and customer-specific standards

Power systems

Thermal design and electrical demands

MAKE PROJECT EVIDENCE USEFUL

A photograph is a start.
The details tell the story.

When you request a reference build, ask for the construction, material, finish and inspection scope that make it relevant to your own design. Confirm permission to share any customer work, and separate sample photographs from verified production records.

Relevant evidence helps a technical conversation go further than a gallery of unidentified circuit boards.

Use the verification checklist

A FEW GOOD QUESTIONS

Before you
place an order.

Practical starting points for your engineering and purchasing conversations.

View all FAQs

How do I find a reliable PCB manufacturer in China?

Begin with a design-specific capability review. Verify the business identity, manufacturing site, quality documents and relevant project experience. Compare written quotations using the same specifications, and define a first-build validation plan before committing to a larger order.

How much does PCB manufacturing in China cost?

A meaningful quotation requires the board data and quantity. Ask the supplier to separate fabrication, tooling, assembly, components, testing and shipping where applicable. Compare offers only after checking that the material, construction, inspection scope and delivery terms match.

What is the minimum order quantity?

Minimum order quantities depend on the provider, construction and commercial terms. Include both your first-build quantity and possible repeat volumes in the RFQ. Ask whether panelization, components, tooling or a special material creates a separate minimum purchase requirement.

How long do production and shipping take?

Request separate estimates for engineering review, material or component sourcing, fabrication, assembly and shipping. Confirm when the quoted production clock starts. Customs clearance and design changes can affect the delivery plan, so distinguish the ship date from the date required at your facility.

What files do I need to send for a quote?

Prepare fabrication data, a board specification and relevant mechanical drawings. For assembly, include the BOM, component placement data and assembly instructions. Identify the design revision, requested quantities and test requirements, and confirm the provider’s preferred file formats before transfer.

Are import duties charged on PCBs shipped from China?

Import charges depend on the destination, product classification, origin and current rules. Bare boards and finished electronic assemblies may require different treatment. Confirm the details using the destination’s current official customs information or a qualified customs specialist before calculating the delivered cost.

How is my design IP protected?

Clarify the legal entity receiving your files, who may access them, whether work is subcontracted and how files are retained or deleted. Agree on confidentiality and reuse restrictions before sharing sensitive design data. Obtain legal advice if the project requires contractual protection.

Which certifications should a Chinese PCB manufacturer hold?

Choose quality and regulatory requirements based on the product and its application. Request current documents and check the legal entity, manufacturing site, issuing body and scope. A certificate should support the project’s qualification requirements; it does not replace a design-specific process and acceptance review.

YOUR NEXT BUILD STARTS WITH A CONVERSATION

Get a Quote from a
PCB Manufacturer in China.

Bring your design files, specifications and quantities.
Start a fabrication or assembly review for your next build.

Get a Quote

Your next build starts here.Get a Quote