High-density interconnect (HDI) printed circuit boards are the rising star of the PCB industry. HDI PCBs use a combination of buried and/or blind vias plus microvias — those of 0.006″ or less in diameter. As a leading HDI printed circuit board supplier, we’re able to work with and deliver boards that have a significantly higher circuitry density than your traditional PCB.
What are HDI PCBs?
High Density Interconnect (HDI) PCBs receive their name from high density routing connections, which hold a large number of components. These high density routing connections have helped reduce the footprint of various popular electronic devices such as tablets, smartphones, computers, and wearable technology products like Virtual Reality (VR devices), and fitness bands.
Most high-density circuit boards fall into one of six different categories. They are PCBs with:
Buried vias and through vias
Coreless construction using layer pairs
Alternative constructions of coreless builds that use layer pairs
Passive substrate constructions with no electrical connection
Through vias from surface to surface
Two or more HDI layers with through vias
HDI technology in printed circuit boards and other areas has been a key driver for developing many of the electronics we use today, especially those whose form factors have significantly decreased in size and weight in recent years.
The smaller the equipment gets, the more likely HDI plays a role in its function. That means you need to work with an excellent HDI printed circuit board supplier, because even a small defect or layout mishap can cause major problems in those tight tolerances.
Why to Use HDI PCBs?
HDI PCBs offer several technical advantages over Surface Mounted (SMT) and through-hole boards.
Design Flexibility: The HDI board offers more design flexibility to a designer than SMT or through-hold board. The designer can take advantage of high component density, which aids in faster signal processing.
Small Footprint: Due to advanced technical characteristics, HDI boards can easily accommodate more connections in the same board with a less number of layers.
Reliability: The HDI boards have small vias, which offer superior reliability over through hole vias due to its low Aspect Ratio (AR).
Ideal for Dense and Complex Packages: HDI is an option for dense and complex packages, where high pin counts, as well as low pitches are involved.
Increasing Demand for Small Printed Circuit Boards: HDI boards fulfill the increasing demand for small PCBs. Non-HDI boards claim more space and weight, which makes them difficult to use in many situations. Also, multiple PCBs can be integrated into a single HDI.
Signal Integrity: Advanced technical characteristics of this PCB helps improve signal integrity, and electrical performance, which makes them simply popular over SMT or through-hole boards.
HDI PCBs – Technical specification
EastwinPCBA´s technical specification
Number of layers
4 – 22 layers standard, 30 layers advanced
Multilayer boards with a higher connection pad density than standard boards, with finer lines/spaces, smaller via holes and capture pads allowing microvias to only penetrate select layers and also be placed in surface pads.
1+N+1, 2+N+2, 3+N+3,4+N+4, any layer in R&D
FR4 standard, FR4 high performance, Halogen free FR4, Rogers
Copper weights (finished)
18μm – 70μm
Minimum track and gap
0.075mm / 0.075mm
0.40mm – 3.20mm
610mm x 450mm; dependant upon laser drilling machine
EastwinPCBA has been delivering engineered HDI printed circuit boards for more than 15 years, and we emphasized to put our customer in the first place and the spirit of hard struggle, we will try our best to provide 100% customer satisfactory service and achieve professional skills on PCB & PCB Assembly.
For HDI PCB production price, please send your PCB file (Gerber format of file preferred) & requirements to firstname.lastname@example.org, we’ll quote ASAP.
If your high density PCB project requires specifications which are not listed in the above table, feel free to reach us through our Online Chat tool or directly email our engineers at email@example.com .