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Who are the Top 16 HDI PCB Manufacturers In the World?

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Item Rigid PCB
Max Layer 60L
Inner Layer Min Trace/Space 3/3mil
Out Layer Min Trace/Space 3/3mil
Inner Layer Max Copper 6oz
Out Layer Max Copper 6oz
Min Mechanical Drilling 0.15mm
Min Laser Drilling 0.1mm
Aspect Ratio(Mechanical Drilling) 20:1
Aspect Ratio(Laser Drilling) 1:1
Press Fit Hole Ttolerance ±0.05mm
PTH Tolerance ±0.075mm
NPTH Tolerance ±0.05mm
Countersink Tolerance ±0.15mm
Board Thickness 0.4-8mm
Board Thickness Tolerance(<1.0mm) ±0.1mm
Board Thickness Tolerance(≥1.0mm) ±10%
Impedance Tolerance Single-Ended:±5Ω(≤50Ω),±7%(>50Ω)
Min Board Size 10*10mm
Max Board Size 22.5*30inch
Contour Tolerance ±0.1mm
Min BGA 7mil
Min SMT 7*10mil
Surface Treatment ENIG,Gold Finger,Immersion Silver,Immersion Tin,HASL(LF),OSP,ENEPIG,Flash Gold;Hard gold plating
Solder Mask Green,Black,Blue,Red,Matt Green
Min Solder Mask Clearance 1.5mil
Min Solder Mask Dam 3mil
Legend White,Black,Red,Yellow
Min Legend Width/Height 4/23mil
Strain Fillet Width /
Bow & Twist 0.3%
Table of Contents
Primary Item (H2)

We see new complex devices making the rounds in the digital world. This is made possible due to advancements in design and manufacturing. One crucial part of these devices is a small printed circuit board. 

High-Density Interconnect (HDI) Printed Circuit boards are multilayer boards with high-density wiring per unit area. They are used in phones, laptops, military weapons, communication systems and avionics. The complex structure of HDI PCBs allows them to be suitable for denser routing. 

They are more compactly made in small dimensions. Because of their small size, they can be used in high-performance electronics such as IoT devices, wearables, and smartphones. Since they are used in extremely important electronics, their manufacturing has to be reliable. 

Understanding HDI PCBs

HDI-high-density interconnect PCBs are circuit boards with a high number of interconnections in a limited workspace. These PCBs function to distribute the signal while being small in size. The dense placement of wire components and pins in small parts ensures they take up less space, making the electronics more compact. 

Here are some important features of HDI PCBs: 

  • Thin dielectric layers that are equal to or below ≤ 60 μm. 
  • The travel space is higher than ≤ 100 μm (3.9 mils). 
  • There are more than ten layers in HDI PCBs. 
  • More finer pad geometries are used in high-density interconnect PCBs. 
Close-up of a hand holding an HDI PCB over schematic diagrams, focusing on intricate circuitry

Benefits of HDI Technology

Here are some significant benefits of HDI technology: 

Better signals

HDI technology ensures the components are placed close to the pad. It reduces the distance that the signal has to travel. The reduced path length leads to better signals. Moreover, HDI removes stubs and reduces the reflection in signals so that the signal has a better quality. Tight impedance control contributes to the higher signal speed, improving the communication technology. 


The small size of HDI PCBs has made miniaturization possible in electronic devices. We see buried vias, blind vias, and microvias that make the circuit board smaller. Some examples are the compact engine size of an electric car and downsized computer parts. Miniaturization also ensures the devices are lightweight, making them more portable.

Reliable technology 

PCBs have a stacked design, which is sturdy and shields the important electronic components from environmental changes. 


Using thinner board materials, decreasing filled vias, and switching 8-layer boards with 6-layer boards helps reduce cost while being equally functional. 

Versatile design 

HDI technology allows more than 40+ layers of PCB designs with higher component density. Moreover, stabilized manufacturing of HDI PCBs creates new versatile designs. 

Noise isolation 

The analog and digital signals are different; therefore, they offer better noise isolation. It can also be done via targeted shielding or filtering to avoid bounceback.

3D illustration of HDI PCB with detailed vias and BGA land pads for electronic circuit design

Applications of HDI PCBs

HDI PCBs are used in automotive RADAR systems, wearables, medical devices, 5 G infrastructure, aerospace electronics, smartphones, laptops, and high-design communication. They are also used in RF microwaves and military communication and weapons. 

Disadvantages of HDI PCBs

Here are some challenges that currently impact the HDI PCB manufacturing: 

  • It's an evolving technology with several changes going on. 
  • Some design limitations may lead to lower yield. 
  • The initial equipment setup is expensive.
  • Vias holes are flexible and need care during processing. 
Array of green HDI PCBs ready for electronics assembly and production

Top 16 HDI-PCB Manufacturers

We'll discuss the top players in HDI PCB manufacturing. 

1. Global Well PCBA company

Based in China, Global Well has been manufacturing HDI PCBs for over 15 years. Their manufacturing capacity ranges from 1+N+1 to 4+N+4,  They are proficient in R&D manufacturing as well, specialization includes rigid-flex PCBs, aluminum, RF PCBs, and HDI PCBs The primary business partners are in the telecom, medical, aerospace, and auto sectors, Global Well is ideal if you need technical advice, custom design, or advanced multilayering.

Their manufacturing abilities range from 2-layer to 42-layer PCB stackup designs. Besides, they offer conformal coating, SMT, and DIP assembly. Global Well company has manufacturing units in North America, South America, Europe, Southeast Asia, and so on. One can be assured of the quality of the company as it is certified by ISO13485, ISO9001, IATF1694, REACH, and RoHS. 

2. Ibiden

Ibiden is a Japan-based manufacturing company with over $5 billion in revenues. Their multiple HDI PCB manufacturing units are located in Malaysia, Japan, Germany, the USA, and Singapore. They can manufacture high-density PCB with more than 20 layers and 35 μm thin cores. 

Ibiden uses laser drilling technology to make flexible multilayers of AI use, holographic displays, aerospace industry, and infrastructure needs.

3. Flex International

Flex International PCB fabrication and assembly includes 6-10 layers as per the design requirements. They can support custom flexible PCBs for military, medical, aerospace, and communication demands. Flex International has bling and is buried via laser as small as 25 μm. They are ideal for companies that require quick delivery of prototypes and bulk orders. 

4. Shenzhen Kinwong

Among the largest PCB manufacturers in China, Kinwong has a sales record of over $800 million. Founded in 1992, they have spread across seven different plants capable of 20 and above PCB layers. They have microvia up to 60 μm and a line space of 2/2 μm.

Kinwong also offers thun cores down to 25 μm in a multilayer board. Their current partners include wearable OEMs, phones, telecommunications, and industrial electronics. 

5. CMK Corporation

CMK Corporation is situated in Japan and has expertise in fine pitch boards and IC substrates. Moreover, they are primary manufacturers of IC packaging and high-density wire bonding. They can build more than 20-layer PCBs with 50 μm thin cores. Their manufacturing also supports flexible multilayers and chop bonding. 

6. Dynamic Electronics

Based in Thailand, Dynamic Electronics is a known HDI PCB manufacturer in the defense, industrial and medical fields. They are experts in manufacturing rigid-flex and RF PCB. You may hire them to produce up to 20-layer PCBs with 80 μm or 65 μm microvia. They also offer aluminum on flex and multilayering in complex HDI designs.

7. Nan Ya PCB

Based in Taiwan, Nan Ya PCB is among the most reliable flex, rigid, and rigid-flex HDI PCBs. They can manufacture prepregs copper-clad laminates for PCB finishing. If you require copper-filled, blind, or buried vias, they are a great choice. Build more than ten layers of thin core PCB with Nan Ya PCB. They have been dealing in routers, switches, and automotive electronics. 

8. Shinko Electric

Shinko manufactures is based in Japan and provides services like IC substrates, HDI PCBs, and semiconductor packages. Their engineers can make thin cores of 35 μm and more. One of the most significant design elements is their 15/15 μm line space. Their primary customers are infotainment, communication infrastructure, and computing for making up to 20-layer PCBs. 

9. Flexium Interconnect

Based in Taiwan, it is one of the most sought-after multilayer PCB manufacturers. Their revenue of $1 billion speaks for itself when it comes to flex and rigid-flex PCB manufacturing. They can deliver PCB build layers up to 8 with roll-roll processing. 

Flexium uses laser via ablation for precise manufacturing. They have been serving companies that manufacture smartphones, wearables, laptops, and virtual reality devices. 

10. Fujikura

With more than $1.3 billion in revenues, Fujikura is among the most chosen Japanese PCB manufacturers. They offer 6-8 layer flexible printed circuits with blind vias and micro vias. Companies may choose from roll-to-roll lamination, rigid-flex integration, and flex-on-flex multilayers. They may also choose from custom PCBs for robotic devices, automobiles, and medical equipment.

11. Samsung Electro-Mechanics

Samsung is among the most popular names in manufacturing. This Korean megaplayer in electronics manufacturing has a PCB manufacturing unit called Samsung Electro-Mechanics. 

They can design rigid-flex and high-layer FC substrates with up to 18 to 36 layers. Their other capabilities include 2/2 μm line space and microvias of 50 μm. They deal in businesses such as computer and mobile processors, IT equipment, and laptop processors. 

12. TTM Technologies

With more than $2.2 billion and 16,000+ global employees, TTM Technologies is a PCB manufacturing giant. Their primary partners are industries like defense, automobiles, aerospace, and smartphones. 

They have cutting-edge technology to build more than 30-layer PCBs with different microvias. You may hire them to create any layer HDI as a part of custom designs. They also offer sequential lamination and stacked vias. 

13. Tripod Technology

Tripod Technology can make PCBs up to 36 layers with a thickness tolerance of ±10%. The company has a $1 billion turnover and serves clients from multiple Taiwan facilities. They use MSAP to make thin HDI boards with high precision. Their main clients include automotive electronics, communication devices, and wearable segments. 

14. Zhen Ding Tech

Headquartered in Taiwan, Zhen Ding Tech has made more than $2 billion in revenues producing flexible circuit boards. They have been in business for over a decade, taking orders for PCBs with over 36 layers, wafer level, and chip-scale boards. 

The company can produce flex-on-flex multilayers, flexible substrates, and thin laminates. Zhen Ding Tech's business partners are companies that deal in advanced smartphones, virtual reality devices, and automotive. 

15. Unimicron Technology

Unimicron deals in stacked/staggered microvias and thin-core HDI PCBs with high TG materials. Located in Taiwan, the company is an ideal choice for smartphones, wireless devices, laptops, and portable electronics. They offer custom design and sequential lamination. Their multiple HDI facilities have the technology to create HDI flex-rigid boards.

16. AT&S

With plants in locations such as China, Korea, Austria, and India, AT&S is among Europe's largest PCB manufacturers. They have experience in making HDI boards and IC substrates with trace space ≤ 5/5 μm. AT&S has technologies such as wafer-level packaging and laser drilling. They are known for products for industrial, medical, automotive, 5G, and radar use.

HDI PCB applications, highlighting advanced electronics technology

Choosing the Right HDI PCB Manufacturer: Key Factors to Consider

Here are some important things to keep in mind when choosing an HDI PCB manufacturer. 

Certification of quality

Companies with appropriate certificates, such as IPC 6012 Class 3 and Class 3A certification, will ensure premium HDI PCBs. To maintain quality, make sure the manufacturer does continuous testing and inspection. 

Technical provisions

Compare different manufacturers for their thin core handling skills, laser drilling, microvia size, and number of layers. Discuss stacked designs and blind and buried vias for dense PCBs. Learn about the technology used in the production process. 

Production capacity

A reliable delivery with the required amount of manufacturer units should be the goal. Look for multi-functional production units for mass HDI production. See that the manufacturers have different manufacturing facilities to take custom orders. 

Location and deliveries

See if the location is close to your manufacturing unit. In case you are partnering with an international PCB manufacturer, look for overnight deliveries. If you choose a location close to your manufacturing unit, your carbon footprint can be significantly reduced. 

Budget and price

Create a budget for manufacturing orders and look for companies within that. Also, consider the pricing will go up for custom and complex designs with more layers. The manufacturers may give some offers if you place bulk orders, so enquire about that. 

Customer support

Ensure the company has a prompt conflict resolution. Look for reviews and testimonials to confirm transparency and quality. 

Trends in HDI PCB Manufacturing: Opportunities and Challenges

Here are some trends in HDI PCB manufacturing: 

High-power PCBs

High-power PCBs are used to make electric vehicles, solar motors, and energy converters. They ensure that renewable energy machines have the right connections to convert and store the power. 

Without high-power PCBs, these electronics do not stand a chance of being renewable, clean energy resources. Manufacturers can switch to high-power PCBs that are thick and use heavy copper to ensure durable electronics. Besides, the use of fail safe circuits is another trend that prevents overheating, enhancing the power of machinery. 

Automated Production

Automated production in PCB manufacturing is increasing precision and efficiency. Moreover, automation is able to reduce costs while giving the same or more quality results. More manufacturers are adopting automation over manual assembly. 

IoT in PCBs

The interconnection of IoT in PCBs can improve the signal and functionality of the circuit. With the incorporation of wireless IoT circuits, in analog or digital form, the boards will have better thermal management. 

It enhances the workability of the PCB without overheating. Another benefit of IoT in PCBs is security, as they can be encrypted to avoid data theft. Several high-tech PCB-based wireless devices can be designed with IoT integration. 

Environment-Friendly Recyclable PCBs

Several electronic components end up in landfills, adding to the pollution. The goal is to make manufacturing more sustainable and avoid using toxic chemicals/metals in manufacturing. 

Besides, the use of biodegradable or recyclable polymers and metals is expected to rise in PCB fabrication. CNC machining and injection molding are some ways to prevent raw material waste generated when producing PCBS. 

Flexible PCBs

Flexible PCBs are thinner and bendable in small electronics. While being small, they still perform well and are temperature resistant. Their small size is ideal for compact electronics in the medical field, aeronautics, and automotive industry. Flexible PCBs can be used in different shapes of wearable devices or make them more comfortable for the user. 

Additive Manufacturing

Additive manufacturing is great for creating complex components of HDI PCBs. It also reduces waste of the raw materials and manual labor needed for manufacturing. 3-D printing PCB parts is quick and can be adapted for fast turnaround time. 

Increased Use of Commercial Components 

Many manufacturers are moving towards commercial-off-the-shelf/COTS components in production. The volume of production can be increased with these components while being reliable in quality.

Challenges in PCB Production 

Some challenges may impact PCB manufacturing and becoming part of electronics. 

Final Product Quality

After choosing the right PCB manufacturing, the next step is to ensure flawless assembly. It will dictate the electronic quality and durability. Apart from the quality of PCBs, the assembly must be done while keeping the end product in view. More skilled technicians are required for the automation and installation of IoT-based PCB devices. 


The final cost of PCB products is determined from raw materials in manufacturing, labor, and machinery for fabrication. These costs may be controlled with the use of new technologies that reduce wastage. However, automation technology can be expensive to set up in the beginning. Also, due to competition, the price may go down for manufacturers to get the most orders. 

Reliable Supply Chain

Finding a reliable supply chain with quality manufacturing may be a challenge for many companies. The geographical location and delays in delivery add up to challenges and timely assembly of the electronics. Supply chain control that has a network of manufacturers, vendors, transportation, and storage is the key to PCB company's success. 

Updates in Regulation

The current regulations are being constantly updated. As a result, the manufacturers have to be aware of all these manufacturing guidelines to ensure safe and quality manufacturing. Some manufacturers may cut costs, or there may be counterfeiting. So, the buyers have to be vigilant that the product complies with the current regulations of safety and durability. 

High-density Interconnects (HDI)

HDI PCBs are known for producing traces in them. Therefore, there may be some noise issues due to more routing of these traces in smaller areas. More care has to be exercised when fabricating HDI PCBs to avoid this issue. Besides, research must be done to reduce noise issues in these circuits as the layers are increased. 

The Future of HDI: Innovations on the Horizon

We’ll discuss how HDI technology can be further improved. 

Growing Global and Domestic Demand

There is a huge demand for high-tech electronics, including healthcare, medicine, and automobiles. This demand is the reason so many manufacturers are working around the clock. Moreover, they are using automation, artificial intelligence, and 3-D printing to ensure high production. 

Room for Innovation

The emerging technology, updates in designs, and the need for quality call for more innovation in manufacturing PCBs. With the increased use of flexibles and HDI PCBs, manufacturers have a goal to have reliable products while being affordable.

Reliable Partnerships

The collaboration of PCB manufacturers and the electronic industry has the potential for a long-term partnership. It is essential both the partners meet the expectations to create impeccable electronics. The quality of the components and end products must not be compromised to maintain the brand's trust. 


High-Density Interconnect PCBs are the future of miniature electronics. They are made with thin and light boards to fit into compact designs. The circuit is tightly packed with less bounce of signal. Moreover, HDI PCBs are ideal for improving device signal speed with dense connections and impedance control. 

Choosing the right manufacturer with the expertise and premium raw materials is important for quality assurance. With the top 16 manufacturers listed above, you can choose one as per your design and device needs. 

If you require a custom prototype, get in touch with the professionals to see the design come to reality. The prototype will be helpful in learning about design limitations and production possibilities.

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