Top 10 PCB Board Making Suppliers in South Korea

Founded in 1965, Hanwha Advanced Materials isn't just a supplier—it's a pioneer in the Korean PCB industry. As part of the Hanwha Group, a conglomerate with deep roots in technology and manufacturing, this Seoul-based firm has grown into one of the world's largest producers of high-performance PCBs. What really sets them apart? Their focus on next-gen applications like 5G infrastructure, electric vehicles (EVs), and AI-powered devices.

Hanwha's portfolio includes everything from rigid PCBs for consumer electronics to flexible and rigid-flex boards for wearables and medical devices. But their claim to fame? Their advanced smt pcb assembly capabilities. With fully automated SMT lines and a team of engineers trained in the latest soldering techniques, they can handle complex assemblies with components as small as 01005 (0.4mm x 0.2mm)—perfect for miniaturized tech.

One client, a leading EV battery manufacturer, praised Hanwha for their "ability to meet tight tolerances for heat-resistant PCBs—critical for our battery management systems." It's this dedication to solving unique challenges that keeps Hanwha at the top.

You might know Samsung for smartphones, but Samsung Electro-Mechanics (SEMCO) is the unsung hero behind the scenes. Based in Suwon, just south of Seoul, SEMCO has been a cornerstone of the Korean PCB industry since 1973. As a subsidiary of Samsung Electronics, they have access to unparalleled resources and technology, making them a go-to for companies needing high quality smt pcb manufacturing .

SEMCO specializes in high-density interconnect (HDI) PCBs, which are essential for modern electronics. Their HDI boards feature microvias (holes as small as 50μm) and fine-pitch circuits, allowing for more components to be packed into smaller spaces—ideal for VR headsets, drones, and IoT sensors. They also excel in IC substrates, the "brains" of semiconductors, supplying companies like Intel and TSMC.

A semiconductor client noted, "SEMCO's IC substrates have helped us reduce chip size by 15% while improving performance—their precision is unmatched." For projects where quality can't be compromised, SEMCO delivers.

Daeduck Electronics has been a quiet force in Korean manufacturing since 1970. Based in Incheon, a port city with easy access to global shipping routes, Daeduck prides itself on being a reliable smt contract manufacturer for both local and international clients. What makes them unique? Their "one-stop shop" approach—offering everything from PCB design support to final assembly and testing.

Daeduck's sweet spot is mid-to-high volume production, with a focus on automotive and industrial PCBs. Their automotive-grade PCBs are used in advanced driver-assistance systems (ADAS), infotainment units, and EV powertrains, meeting strict IATF 16949 standards. They also cater to the renewable energy sector, producing PCBs for solar inverters and wind turbine controllers.

An automotive Tier 1 supplier shared, "Daeduck's ability to scale production from 1,000 to 100,000 units seamlessly has been crucial for our growth. They're more than a supplier—they're a partner."

Busan, South Korea's second-largest city, is home to Kwangjin PCB, a family-owned business that's been thriving since 1988. While smaller than some conglomerate-backed firms, Kwangjin has carved a niche with its agility and focus on customer service. They specialize in low-to-medium volume production, making them a top choice for startups and SMEs.

Kwangjin's expertise lies in quick-turn prototypes and small-batch runs. Need a 10-layer PCB prototype in 3 days? They've got you covered. Their services include smt prototype assembly service , with engineers available to assist with design for manufacturability (DFM) checks—saving clients time and money by catching issues early. They also offer conformal coating and functional testing to ensure prototypes are ready for validation.

A startup founder in the smart home space said, "Kwangjin turned our rough PCB design into a working prototype in a week. Their DFM feedback helped us avoid costly mistakes in production. We've stuck with them even as we've scaled."

Daejeon, South Korea's "Silicon Valley," is where NH Tech calls home. Founded in 1992, this supplier has built its reputation on innovation, particularly in high-frequency PCBs for telecom and aerospace applications. If you're working on 5G base stations, satellite communication systems, or radar equipment, NH Tech is a name you'll want to know.

NH Tech's high-frequency PCBs use advanced materials like PTFE and ceramic-filled laminates, which minimize signal loss even at frequencies above 40GHz. Their expertise in controlled impedance and tight tolerance control (±5μm) makes them a favorite among defense contractors and telecom giants. They also offer high precision smt pcb assembly for these sensitive boards, with anti-static facilities to protect delicate components.

A defense client noted, "NH Tech's radar PCBs maintain signal integrity in extreme environments—from desert heat to arctic cold. Their attention to detail is critical for our mission-critical systems."

Not to be confused with Samsung Electro-Mechanics, Samsung PCB (based in Gumi, a major electronics hub) is a standalone subsidiary focused solely on PCB manufacturing. Since 1974, they've specialized in rigid PCBs for consumer electronics, producing millions of boards annually for devices like smart TVs, laptops, and home appliances.

What makes Samsung PCB a leader? Their massive scale and cost efficiency. With fully automated production lines and economies of scale, they offer competitive pricing for high-volume orders. But they don't skimp on quality—their iso certified smt processing factory ensures that even with high output, defect rates stay below 50ppm (parts per million).

A major appliance manufacturer shared, "Samsung PCB's ability to scale production during peak seasons (like holidays) without delays has been a game-changer for our supply chain." For large-scale projects, their reliability is unmatched.

LG Innotek, a subsidiary of LG Group, is another heavyweight in the Korean PCB scene. While they're best known for camera modules and LEDs, their PCB division (based in Seoul) has quietly become a leader in flexible PCBs (FPCBs) and rigid-flex solutions. These boards are essential for devices that need to bend or fit into tight spaces—think smartwatches, foldable phones, and medical wearables.

LG Innotek's FPCBs are thinner (as thin as 0.05mm) and more durable than most competitors, withstanding over 100,000 bending cycles. They also offer smt assembly with testing service , including automated optical inspection (AOI) and X-ray to ensure every component is placed correctly. Their focus on miniaturization has made them a key supplier for Apple, Google, and other global tech brands.

A wearable tech company raved, "LG Innotek's FPCBs allowed us to reduce the weight of our smartwatch by 15% while adding more sensors. Their engineering support was invaluable in refining our design."

Mirae Corporation, founded in 1974, is a global player with manufacturing facilities in South Korea, China, and the U.S. Their Pyeongtaek plant, located south of Seoul, is a hub for high-layer PCBs—boards with 20+ layers used in servers, data centers, and high-performance computing (HPC) systems. When it comes to handling complex, multi-layer designs, Mirae is a reliable smt contract manufacturer with a track record of excellence.

Mirae's HDI and high-layer PCBs feature advanced technologies like sequential lamination and laser drilling, allowing for intricate routing and high signal speeds. They also offer turnkey smt pcb assembly service , managing everything from component sourcing to final testing. Their data center clients appreciate their ability to meet strict thermal management requirements, ensuring PCBs can handle the heat of high-power CPUs and GPUs.

A server manufacturer noted, "Mirae's high-layer PCBs have helped us increase the processing power of our data center servers by 25% without increasing size. Their thermal management solutions are top-notch."

Ansan, a city known for its industrial parks, is home to Pan-United Electronics, a mid-sized supplier with a focus on niche markets. Founded in 1990, Pan-United has built a reputation for specialized PCBs, including metal-core PCBs (MCPCBs) for LED lighting, high-temperature PCBs for automotive under-the-hood applications, and thick-copper PCBs for power electronics.

What makes Pan-United unique? Their willingness to take on custom projects that larger suppliers might overlook. Need a PCB that can withstand 200°C temperatures for a industrial oven controller? Or a MCPCB with 3oz copper for high-power LEDs? They've got the expertise. They also offer low volume smt assembly service , making them ideal for niche products or specialized industrial equipment.

A LED manufacturer said, "Pan-United's MCPCBs improved the heat dissipation of our high-bay lights, extending lifespan by 30%. They were the only supplier willing to tweak their process to meet our unique specs."

Rounding out our list is SK Nexilis, a relative newcomer but a force to watch. Founded in 2015 as part of SK Group (a leader in chemicals and energy), SK Nexilis has quickly become a global leader in copper foil—a critical material for PCBs. While they don't produce PCBs directly, their high-quality copper foil is used by most of the suppliers on this list, making them an essential player in the Korean PCB ecosystem.

SK Nexilis specializes in ultra-thin copper foil (as thin as 2μm) for HDI PCBs and high-performance applications. Their foil offers superior adhesion and uniformity, reducing defects in PCB manufacturing. They also produce anode foil for lithium-ion batteries, linking them to the EV boom. While not a PCB assembler, their innovation in materials drives the entire industry forward.

A PCB manufacturer client noted, "SK Nexilis' ultra-thin foil allows us to produce PCBs with finer lines and more layers, pushing the limits of what's possible in electronics design."