Tel ：+86 13425156463
Email：sales@toplinecircuit.com

PCB Manufacturing and Assembly for Prototypes and Production

From PCB prototypes to full production, we provide PCB fabrication, component sourcing,
assembly, inspection, and testing for global electronics projects.

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Engineering Review

Gerber, stack-up, BOM, and assembly file review before production.

PCB to PCBA Workflow

PCB fabrication, component sourcing, SMT, THT, inspection, and testing.

Prototype to Production

Support for prototype, low-volume, and repeat production orders.

Project-Specific Testing

Electrical testing, AOI, X-ray, ICT, and functional testing based on project needs.

One-stop Service

PCB manufacturing, components sourcing, SMT & assembly

High Quality

IPC standards, 100% E-test, AOI inspection

Fast Delivery

Quick-turn and on-time delivery worldwide

Competitive Price

Direct factory, cost-effective solution

Your Reliable One-stop PCB Manufacturing and Assembly Partner

Topline Circuit supports PCB projects from prototype to volume production. We provide PCB fabrication, component sourcing, SMT and THT assembly, inspection, and testing for industrial control, medical, automotive, telecommunications, and consumer electronics projects.

  • Engineering review before production
  • Process control from PCB fabrication to assembly
  • Inspection and testing support
  • Confidential handling of Gerber files, BOMs, and project data
Learn More About Us

Your Reliable One-stop PCB Manufacturing and Assembly Partner

Topline Circuit supports PCB projects from prototype to volume production. We provide PCB fabrication, component sourcing, SMT and THT assembly, inspection, and testing for industrial control, medical, automotive, telecommunications, and consumer electronics projects.

Learn More About Us
  • Engineering review before production
  • Process control from PCB fabrication to assembly
  • Inspection and testing support
  • Confidential handling of Gerber files, BOMs, and project data

Product Categories

Wide range of PCB products to meet your diverse needs.

Blue PCB assembly with integrated circuits and electronic components

HDI PCBs

High-density interconnect PCBs with microvias and fine-line routing for compact electronics.

Black PCB assembly with electronic components and integrated circuits

lmpedance Controlled PCBs

Controlled stackups for stable impedance and reliable high-speed signal transmission.

Green PCB assembly with IC chips and surface mount components

High Frequency PCB

Low-loss PCB materials for RF, microwave, antenna, and high-frequency applications.

Copper core PCB board for high thermal performance electronics

Rigid-Flex PCBs

Rigid-flex circuit boards combining rigid and flexible sections for compact designs.

Flexible PCB board with mounted electronic components for compact devices

Flexible PCBs

Flexible circuits for wearables, compact devices, and space-limited applications.

Heavy Copper PCBs

Heavy Copper PCBs

High-current PCBs with thick copper layers for power and industrial applications.

Blue PCB assembly with integrated circuits and surface mount components

Aluminum PCBs

Metal core PCBs designed for efficient heat dissipation in LED and power electronics.

Precision electronic components and circular hardware for PCB manufacturing applications

High Frequency PCB

High Tg materials for improved thermal stability and high-temperature reliability.

PCB and Assembly Capabilities for Complex Electronics

Explore selected PCB fabrication and assembly capabilities for compact, high-speed, high-reliability, and production-ready electronics.

Blue PCB assembly with integrated circuits and electronic components

HDI PCBs

High-density interconnect PCBs with microvias and fine-line routing for compact electronics.

Green PCB assembly with IC chips and surface mount components

High Frequency PCB

Low-loss PCB materials for RF, microwave, antenna, and high-frequency applications.

Copper core PCB board for high thermal performance electronics

Rigid-Flex PCBs

Rigid-flex circuit boards combining rigid and flexible sections for compact designs.

Heavy Copper PCBs

Multilayer PCB

Multilayer PCB manufacturing with controlled impedance, reliable stack-up, and stable layer alignment.

Blue PCB assembly with integrated circuits and surface mount components

Turnkey PCB Assembly

Complete PCB assembly support from BOM sourcing and SMT to inspection, testing, and delivery.

Precision electronic components and circular hardware for PCB manufacturing applications

BGA Assembly

Precision BGA assembly with controlled reflow, AOI, and X-ray inspection for hidden solder joints.

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Quality Assurance

IPC standard and 100% testing

Technical Support

DFM review and engineering support

Cost Effective

Competitive factory pricing

On-time Delivery

Fast production lead time

PCB Fabrication

Multilayer, HDI, high-frequency, rigid-flex, flexible, heavy copper, and other PCB technologies.

PCB Assembly

SMT, THT, BGA, mixed assembly, prototype assembly, and repeat production.

Component Sourcing

BOM review, component sourcing, approved alternatives, and supply-risk checks.

Testing & Inspection

PCB electrical testing, AOI, X-ray, ICT, and functional testing based on project requirements.

Clients who trust us.

“Topline Circuit supported our prototype PCBA from BOM review through assembly and X-ray inspection. The team identified several component and footprint issues before production, which helped us avoid rework.”
Michael SmithPurchasing Manager
“The HDI PCB samples were delivered with clear inspection records and stable quality. Communication was responsive, and the engineering team confirmed the stack-up and impedance requirements before production.”
David JohnsonProduct Director
“We sent the Gerber files, BOM, and assembly drawings for a turnkey project. Topline Circuit handled component sourcing, SMT assembly, inspection, and testing, and kept us updated throughout the order.”
Lisa WangProject Engineer
“We first ordered a small prototype batch and later moved to repeat production. The documentation, component control, and production consistency made the transition much easier.”
Lisa WangProject Engineer
“The team reviewed our BOM, identified long-lead components, and suggested approved alternatives for our confirmation. This helped us keep the assembly schedule under control.”
SASHAElectrical Engineer

Clients who trust us.

“Topline Circuit supported our prototype PCBA from BOM review through assembly and X-ray inspection. The team identified several component and footprint issues before production, which helped us avoid rework.”
Michael Smith
Purchasing Manager
“The HDI PCB samples were delivered with clear inspection records and stable quality. Communication was responsive, and the engineering team confirmed the stack-up and impedance requirements before production.”
David Johnson
Product Director
“We sent the Gerber files, BOM, and assembly drawings for a turnkey project. Topline Circuit handled component sourcing, SMT assembly, inspection, and testing, and kept us updated throughout the order.”
Lisa Wang
Project Engineer
“We first ordered a small prototype batch and later moved to repeat production. The documentation, component control, and production consistency made the transition much easier.”
SASHA
Electrical Engineer

Our Services

From concept to mass production, we provide end-to-end solutions.

PCB Fabrication

High-quality PCB manufacturing

Components Sourcing

Global components procurement

PCB Assembly

Advanced SMT & DIP assembly

Testing & Inspection

AOI, X-ray, ICT and functional test

Testing & Inspection

AOI, X-ray, ICT and functional test

Packaging & Delivery

Secure packaging and worldwide delivery

Our Services

From concept to mass production, we provide end-to-end solutions.

PCB Fabrication

High-quality PCB manufacturing

Components Sourcing

Global components procurement

PCB Assembly

Advanced SMT & DIP assembly

Testing & Inspection

AOI, X-ray, ICT and functional test

Packaging & Delivery

Secure packaging and worldwide delivery

Service Support

Full-Service Support at Every Stage

From inquiry and engineering review to production tracking and after-sales service,
our team supports your PCB project at every stage.

01
Engineers reviewing PCB design for electronics manufacturing project

File Review

  • Gerber files
  • BOM
  • CPL
  • Assembly drawings
  • Order quantities
  • Testing requirements
02
PCB layout displayed for DFM and BOM review before manufacturing

DFM and BOM Check

  • PCB stack-up
  • Manufacturing capabilities
  • Component footprints
  • BOM availability
  • Supply risks
  • Approved alternatives
03
Technician inspecting assembled circuit boards beside an SMT production line

PCB Fabrication

  • Material preparation
  • Inner-layer processing
  • Lamination
  • Drilling and plating
  • Surface finish
  • Electrical testing
04
Close-up of BGA packages and gold contact pads on printed circuit boards

Component Sourcing

  • BOM sourcing
  • Supplier verification
  • Approved alternatives
  • Lead-time review
  • Incoming inspection
  • Material preparation
05
Technician performing manual soldering and visual inspection on a PCB assembly

Assembly and Inspection

  • Solder paste printing
  • SMT placement
  • Reflow soldering
  • THT assembly
  • AOI inspection
  • X-ray inspection
06
Staff preparing inspected PCB assemblies for packaging and shipment

Testing and Delivery

  • PCB electrical testing
  • ICT
  • Functional testing
  • Firmware programming
  • Packaging
  • Shipment
Get a Quote
Contact Us

News & Resources

Explore practical PCB manufacturing and assembly insights, including materials, production processes, quality control, and project preparation.

PCBA manufacturer evaluation detail with fine-pitch SMT components and clean solder joints

How to Choose the Right PCBA Manufacturer for BOM Review, Testing, and Production Risk

| Read More
High-frequency PCB material cross-section showing controlled dielectric substrate layers and copper interface for RF signal stability.

Controlled Impedance vs Controlled Dielectric

| Read More
Bare multilayer PCB detail showing ENIG gold pads and microvias for fabrication and stack-up verification before assembly.

What Files Are Required for an Accurate PCB Assembly Quotation?

| Read More
Rigid-flex PCBA assembly detail showing SMT components on the rigid section transitioning to a matte polyimide flexible circuit area for complex electronic manufacturing.

Flex & Rigid-Flex PCB Assembly

| Read More

News & Resources

Explore practical PCB manufacturing and assembly insights, including materials, production processes, quality control, and project preparation.

PCBA manufacturer evaluation detail with fine-pitch SMT components and clean solder joints

How to Choose the Right PCBA Manufacturer for BOM Review, Testing, and Production Risk

| Read More
High-frequency PCB material cross-section showing controlled dielectric substrate layers and copper interface for RF signal stability.

Controlled Impedance vs Controlled Dielectric

| Read More
Bare multilayer PCB detail showing ENIG gold pads and microvias for fabrication and stack-up verification before assembly.

What Files Are Required for an Accurate PCB Assembly Quotation?

| Read More

Find out how we can help with your next PCB project.

Tell us your PCB type, quantity, material, assembly, and testing requirements. Our team will review the files and prepare a quotation based on your project specifications.

Request a Quote
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