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Electronic Manufacturing
Service(EMS) - PCB & PCB Assembly

PCB Design & Layout

KSJ offers one-stop sheet metal fabrication services, from cutting, punching, welding, polishing, foaming, assembling, etc, enabling the use of different materials to produce high-precision and complex sheet metal parts.

PCB Fab and PCB Assembly

KSJ offers one-stop sheet metal fabrication services, from cutting, punching, welding, polishing, foaming, assembling, etc, enabling the use of different materials to produce high-precision and complex sheet metal parts.

Professional PCB Supplier

KSJ offers one-stop sheet metal fabrication services, from cutting, punching, welding, polishing, foaming, assembling, etc, enabling the use of different materials to produce high-precision and complex sheet metal parts.

KSJ – Professional PCB Board Fabrication Factory in China

Get a Quick Quote

KSJ is a trusted PCB board fabrication factory located in Shenzhen, China, specializing in high-quality printed circuit board manufacturing for customers worldwide. With over 15 years of industry experience, we provide comprehensive PCB solutions including single-layer, double-layer, multilayer, HDI, rigid-flex, and quick-turn prototypes.

Our factory is equipped with advanced SMT lines, automated production equipment, and rigorous quality control systems. We are ISO9001 and UL certified, ensuring every board meets international standards. From small-batch prototypes to large-volume production, we offer fast lead times, competitive pricing, and one-on-one engineering support to help accelerate your product development.

Strong R&D and Manufacturing Capabilities

At KSJ, our strength lies in our robust R&D and advanced manufacturing capabilities. Our in-house engineering team includes over 20 experienced R&D professionals who work closely with clients to provide customized PCB solutions, from concept to mass production.

Automated Production Lines – Ensure consistent quality and high efficiency from drilling to final testing.

Laser Direct Imaging (LDI) – For high-precision inner and outer layer patterning.

AOI & Flying Probe Testing – 100% electrical inspection to guarantee defect-free boards.

High-Speed CNC Drilling Machines – Support micro vias and fine pitch designs.

From multilayer boards to fast-turn prototypes, we ensure every step — from design verification, material selection, to final testing — is executed with precision and efficiency.

Innovative Engineering. Reliable Production. That’s KSJ.

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Wide Range of PCB Capabilities – One Factory, All Solutions

Multilayer PCB

KSJ offers precision multilayer PCB fabrication with up to 20+ layers. Our advanced lamination technology ensures excellent layer alignment, signal integrity, and reliability.

HDI PCB

We specialize in High-Density Interconnect (HDI) PCBs featuring blind/buried vias, laser microvias, and fine trace spacing.

Flexible PCB

Our flexible PCBs are manufactured with lightweight, bendable materials—perfect for space-saving designs.

Rigid-Flex PCB

KSJ provides rigid-flex PCBs that combine the mechanical stability of rigid boards with the flexibility of flex circuits.

Prototype PCB Assembly

Accelerate your product development with KSJ’s fast-turn prototype PCB assembly. We support low-volume orders, multiple part types, and rapid component sourcing.

BGA PCB Assembly

KSJ provides high-accuracy BGA (Ball Grid Array) PCB assembly with X-ray inspection and reflow soldering processes.

Custom PCB Fabrication for Different Industries

KSJ can fabricate any PCB for your applications, just send us your drawing and get our best quote.

Aerospace

Our fabrication services can produce PCB Board that are ready to use for spacecraft or aircraft

Automotive

We can produce automotive PCB such as side panels, fenders, and hoods through our sheet metal forming capabilities.

Construction

We can provide PCB fabrication for producing construction parts such as corrugated siding, roofing, and more

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    Why KSJ is Trusted by 1000+ Clients

    Effcient and Fast Production

    KSJ can offer a quick-turn service for your PCB fabrication, 24h for the prototype ofsingle-sided and double layers, and 48h for the multilayer. We can also provide fast service for high volume production at an affordable price.

    Excellent Communication with Customers

    We have a professional sales team who can speak different languages such as English German, Spanish, ltalian, and Portuguese, so there’s no language barrier andcommunication is free.

    Experienced Engineering Team Support

    Most of our engineers have more than 10 years of working experience in PCB fabricationthey can give you useful advice for your projects. Especially if there’s an error in yourdesign, we can fx it and make sure it’s correct.

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    Various PCB Assembly Service to Apply Different Application

    KSJ offers custom PCB assembly service for different applications, for example, aerospace, military, medical.
    automotive,industrial control, consumer electronics, and so on.

    What Our Customer Say

    We’ve been working with KSJ for over three years now, and they’ve become our go-to PCB supplier. Their quality is top-notch, their lead times are reliable, and they always support our urgent projects without compromise. Truly a professional partner in every sense.

    Jack
    From US

    What impressed us most about KSJ is their technical support. We had a complex rigid-flex design with impedance requirements, and their engineering team guided us through every detail. The final boards exceeded our expectations in both performance and finish.”

    Friedrich
    Form German

    KSJ helped us launch our first product with fast prototype PCB assembly and BGA mounting. As a startup, we needed flexibility, fast communication, and no surprises. KSJ delivered all of that. Their team feels like an extension of our own.

    Julina
    Form UK

    Related Resource

    Reliable Multilayer PCB
    • Up to 32 layers, HDI 3, 10 0z Cu
    • Blind/buried vias, Via-in-Pad.
    • KB/Shengyi/Rogers/lsola·Flex/Rigid-Flex/Metal Core.
    • Impedance control, lPc Class 3
    • Advanced online quotation
    Get a Quick Quote
    Turnkey PCB Assembly
    • 36 assembly lines.
    • Mixed, double-sided assembly
    • AOl, X-ray, functional testing, lCprogramming, conformal coating& more.
    • 01005 (0402) BGA CSP, QFN.
    • Global supply chain.
    • Online turnkey quotation
    Get a Quick Quote
    Layout Design
    • 10+ years layout experience.
    • Up to 60GHz, 42 layers.
    • Praised by 1000+ customers.
    • EMC and Sl verification
    • DFM verification
    • IP protected and encrypted
    Get a Quick Quote
    Free DFM Analysis Software
    • 150+ DFM/DFA checks.
    • Footprint checker, panelizationtool, impedance tool & more.
    • Developed by KSJ experts
    • Free for everyone
    • Desktop suite & online Gerber
    • Viewer available
    Get a Quick Quote
    Component Purchasing
    • Global sourcing capabilities
    • Mature supply chain
    • Competitive pricing & lead
      times
    • 100% genuine guarantee
    • 600,000+in-stock parts
    • withonline marketplace (HQ Online)
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