What Does an HDI PCB Manufacturer Do?

What Does an HDI PCB Manufacturer Do?

HDI PCBs offer a higher interconnect density than ordinary printed circuit boards. They also have smaller form factors, thinner traces, and tight component spacing. The manufacturing process requires specialized equipment like laser drills and laser direct imaging, as well as expertise in high-density layout.

Hemeixin manufactures HDI flex PCBs with stacked, staggered, and blind vias in a sequential build technology. They use a variety of surface finishes and materials, including Rogers and FR4 standard and halogen-free FR4 materials.


Choosing the right stack-up is essential for a successful HDI PCB. HDI technology improves electrical performance by reducing the signal path length, lowering the power required to complete the circuit, and increasing reliability. The right stack-up design can also help reduce noise and improve signal timing.

There are several types of HDI PCB stack-ups, including buried, blind, and micro vias. These options are designed to improve routing density and signal integrity, but can raise cost. A reputable PCB manufacturer will recommend the best option for your project, and will try to find a balance between cost, lead-time/availability, and performance.

The first step in selecting the right stack-up is determining the size of your circuit board. Then, you can calculate the number of nets per layer. This will help you determine the amount of space you need for differential pairs and other complex signals.

There are several different types of HDI stack-ups, including cap construction, which uses two outer layers on pieces of pre-copper cladded laminate aka core material. This method is less costly than a full-layer stack-up, but it can be difficult to fabricate with traditional copper-clad materials and requires special drilling methods like laser drilling. It is also susceptible to delamination due to high heat. This is a significant concern for high-speed signals, which require short wire lengths.


The materials used for HDI PCBs are a vital factor in determining performance capability. The most common HDI PCBs use FR-4, which consists of epoxy resin & electronic-grade glass fabric that are pressed together. hdi pcb manufacturer The outer layer of the board typically uses non-glass fiber adhesive copper foil, because laser drilling cannot penetrate the glass fabric. However, the material choice isn’t the only factor that affects performance ability – component selection & optimization should also be taken into account.

Another important consideration is the fabrication methods. Some fabricators may require special materials to ensure proper performance in certain processes, such as buried vias. To ensure that your fab is using the right material for your PCB, check with them to find out which materials they’ll accept.

When it comes to high-frequency circuits, HDI boards can deliver improved signal strength & reliability. They can also be made to be as thin as possible, which helps reduce interference in the system. This technology is being used in a number of different applications, from smart phones to tablet computers. It’s even being incorporated into military communications devices and strategic equipment such as missile & defence systems.

The company offers a full range of services, from HDI PCB Manufacturer Supplier design to full fabrication. Their fabs offer various surface finishes, including Gold Fingers, OSP, Electrolytic gold, Immersion Tin and ENIG. They can also accommodate a variety of layer counts, ranging from four to thirty layers. They can also optimize microvias to minimize costs.


The use of high-density interconnect PCBs allows for more components to be packed into a smaller footprint. This can help reduce manufacturing costs and speed up time to market for new products. The high electrical performance of HDI circuit boards also means that it is easier to place components and test and troubleshoot them. This, in turn, can improve reliability and increase the lifespan of a product.

The type of vias used in an HDI circuit board can have a significant impact on manufacturing cost and production time. There are several different types of vias, including blind and buried vias. Each type has its own advantages and disadvantages, so the designer should choose a design style that is efficient yet cost-effective, considering the capabilities of the manufacturer.

A blind via penetrates the PCB layers and connects them, usually on 3 or more internal layers. It has a circular hole with an annular ring to prevent breakout during drilling. The size of the annular ring should be carefully considered, as it can affect signal quality and reliability.

A buried via is more costly than a blind via, but it provides a much stronger and more reliable connection between layers. It penetrates the innermost layer and connects it to the outside layer, which can be more difficult to route due to limited space. A buried via can be staggered or stacked, which allows the designer to optimize space for routing. The design of a buried via requires careful consideration to avoid inductances and capacitances near pads, which can interfere with signal strength and communication speed.


PCB layout is a highly specialized process that requires experience and expertise. It involves optimizing component placement to maximize space utilization and minimize signal interference. The process requires a number of design considerations, including the use of microvias and thin specialty materials. It also requires precise laser drilling and mechanical drilling. This type of PCB is typically used for high-density electronic devices, such as mobile phones and wearables.

Unlike traditional PCBs, HDI boards require tight spacing between traces and pads to accommodate high-density routing. This allows manufacturers to increase circuit density without compromising on signal integrity. However, the lower trace widths and spacing can increase the risk of manufacturing defects. To avoid these issues, it is important to follow the DFM guidelines for HDI PCBs and make sure your design tools are able to support them.

In addition to reducing cost and improving quality, HDI PCBs are more reliable than standard PCBs. This is due to the smaller aspect ratio of microvias and thinner copper deposited. It is also easier to route and test HDI circuits, which means that they can be produced more quickly. As a result, HDI PCBs can provide significant time-to-market advantages and reduce the overall cost of a project. PCBcart offers a variety of HDI fabrication options, from single-layer to multi-layer. They can also fabricate different structures of HDI boards, such as 1+N+1, 2+N+1, and 3+N+2. They offer competitive pricing for all orders and guarantee that their products meet the industry’s strict quality standards.

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