High Density Interconnect
Printed circuit board (PCB) technology continues to evolve. As the need for smaller, more compact products increases, so does the demand for advanced electronics with faster speeds and higher functionality. This is where high density interconnect comes in. Using innovative technology, PCBs can now be constructed with much smaller vias, spaces and copper traces than conventional designs, allowing for an increase in circuitry to make up for the space reduction.
With the development of high density interconnect, manufacturers can now offer PCBs that are not only thinner than ever but also capable of running at higher frequencies with minimal power loss. In addition, the technology allows for a greater number of components to be incorporated into the board without compromising on function.
Essentially, high density interconnect is a process that allows more layers of the PCB to be connected with more vias. This is achieved by combining the existing copper plating process with additional steps to create microvias on each layer. These microvias are then filled with a conductive material to form a continuous conductive path between the layers of the PCB. This process is known as “buildup,” and it is the key to achieving high-density interconnect.
How Does High Density Interconnect Work?
In most cases, a multi-layer HDI PCB will contain both blind and buried vias. The former are holes pierced through the outer layer of a multi-layer HDI PCB to connect to its inner layer. These holes can be drilled mechanically or laser-drilling, but because you can only see the hole on one side of the board, it’s referred to as a blind via. These types of holes are pricey to produce and require additional manufacturing processes to construct, but they allow for high-density circuitry.
The buried vias are located between the layers of the multi-layer HDI PCB and are used to route signal traces and power/ground connections between the layers. They can be staggered or stacked, and they are often used to increase routing density in challenging design applications that demand high-level signal functioning.
Another feature that makes HDI PCBs ideal for use in complex electronic devices is their thermal stability. By incorporating copper unswervingly on the surface of each layer, the technology creates superior thermal dissipation. This ensures that an increased component count will not compromise functional performance, even under difficult operating conditions.
In the end, high-density interconnect provides an efficient and cost effective solution to increasing the amount of circuitry on a PCB. These advanced boards are perfect for a wide range of applications, including mobile /cellular phones, touch-screen devices, 4/5G network communications and military applications. As a result, the technology has become a favorite in the consumer market for smartphones and other portable electronics that require more performance in less space. It is also an excellent choice for industrial applications such as equipment in manufacturing, warehousing and other industries. The technology is also becoming increasingly common in medical equipment, such as surgical machines and monitoring systems.
