High-Density Interconnect (HDI) PCB

hdi pcb

High-Density Interconnect (HDI) PCB

High-Density Interconnect (HDI) PCBs use microvias, blind and buried vias, and thin traces to reduce the size of the circuit board. They are ideal for applications where space, weight, and reliability are important.

Routing efficiencies for HDI boards depend on the stackup, via architecture, part placement, and escape routing for BGA components. These factors can significantly reduce manual routing time and improve product performance.


Developing a PCB requires different steps, and the cost of these steps can be significant. This is because each step needs to be done carefully to ensure that the final product is high quality and reliable. One of the most expensive steps is lamination. Another step is laser drilling, which also costs a lot of money. Therefore, it is important to know how much you can expect to pay for your HDI PCB before deciding to purchase one.

One of the factors that can affect the cost of hdi pcb is the type of via, through-hole or microvias you choose for your board. These holes are smaller than regular through-holes and require more precision to place. They are usually used in complex electronic devices that demand a higher level of performance, including mobile/cellular phones, touch-screen devices and laptops. They are also commonly used in medical equipment, such as pacemakers and imaging machines.

The cost of a hdi pcb can also depend on the amount of layers and if you use a 2-n-2 or 3-n-3 stackup. This is because higher layer counts increase the price of the PCB. The other factor that can impact the cost is the fabrication process. This includes the number of times that the layers need to be laminated and drilled. You can reduce the cost of a hdi pvc by minimizing these processes.


Compared to traditional PCBs, hdi pcb are more reliable and provide improved electrical performance. This is due to the smaller aspect ratios and quality construction of microvias. In addition, they allow for more components to be placed on the same board, which reduces the overall size and weight of the product. They also require fewer materials, which cuts the cost of production and delivery.

The layered structure of HDI PCBs allows for increased routing density. They are usually constructed with a core and multiple layers of plated blind and buried vias. These layers are separated by partially cured laminates and glued together using prepreg. Depending on the design, these prepregs may be pre-cured or used in a hot press. The resulting stack-up is then litho-etched and plated with copper, followed by lamination and the shaping of final through-holes and laser-drilled vias.

While the performance of a hdi pcb is impressive, it’s not without its challenges. For example, trace widths and hole sizes need to be carefully optimized. This is especially important when designing for space. In addition, the use of microvias and a high hdi pcb level of circuit density increases the complexity of the design. This can make the process difficult, but the result is a more reliable and lightweight board. It also improves signal integrity and reduces transmission times.


HDI PCBs allow designers to place components closer together, reducing the amount of wiring needed and increasing circuit density. This increased density improves signal transmission, reducing crosstalk and delay times. It also helps minimize thermal stress and improves service life. In addition, the smaller aspect ratios of these boards make it easier to mount ICs.

Compared to traditional PCBs, HDI boards offer greater flexibility and faster production times. This can reduce the number of prototypes and shorten the time it takes to get a product to market. Additionally, the higher electrical performance of these boards allows for fewer parts and shorter trace lengths. These factors can also help increase reliability, which can lower manufacturing costs.

The design of HDI PCBs is a challenge due to the high-density interconnects they require. The etching process for these PCBs is complex and requires specialized equipment. In addition, the manufacturing process for HDI PCBs may require multiple sequential laminations. This is especially true for those with blind and buried vias.

For these reasons, it is important to choose a qualified supplier when designing an HDI board. This will ensure that your product meets all of your HDI PCB Supplier requirements and delivers the highest quality possible. In addition, a reliable supplier will be able to provide the best price and value.


High-speed signaling on an hdi pcb requires careful design to minimize signal delays and routing congestion. The design process should also take into account impedance matching, signal reflections, crosstalk, and electromagnetic interference (EMI). Advanced simulation and analysis tools can help you identify and address these issues during the design phase to ensure optimal performance and reliability.

HDI PCBs are an excellent choice for applications where size, weight and reliability are important concerns. They utilize blind vias, buried vias, and microvias to reduce space requirements. These technologies allow the circuit board to operate at higher speeds and provide better signal integrity. They also offer a number of benefits over conventional PCBs, including improved thermal management, reduced power delivery resistance, and improved electrical properties.

The microvias used in HDI PCBs have a smaller aspect ratio than traditional through holes, which allows for faster and more accurate signal transmission. This increased reliability helps to decrease the time it takes to test and troubleshoot these boards, which in turn leads to lower manufacturing costs.

A basic HDI board has two levels of microvias, while a complex HDI board uses three levels. The stack-up of the microvias can affect the reliability, so it is important to choose a type that is best for your specific application. The microvias are filled with a copper-based paste and capped with a dielectric layer. A specialized assembly process is required to produce HDI PCBs, which makes it necessary to use a qualified supplier with the appropriate equipment and experience.