Applications of HDI Circuit Boards: From Communications to Military Equipment

Applications of HDI Circuit Boards: From Communications to Military Equipment

HDI circuit boards, characterized by their high density and high reliability, are widely used in communications, military equipment, consumer electronics, automotive electronics, and aerospace. Specific application scenarios are as follows:

**Communication Equipment:** HDI boards are used in 5G base stations, routers, switches, etc., supporting high-frequency signal transmission and high-speed data processing, meeting high-density cabling requirements. Ultra-high layer PCBs (20:1 aspect ratio) offered by manufacturers such as ONESEINE PCB can improve signal integrity in servers and communication equipment.

**Military Equipment:** In the military field: Used in radar, navigation systems, and communication equipment to ensure signal transmission accuracy and anti-interference capabilities. Military-grade HDI boards must meet stability requirements in extreme environments.

**Aerospace:** Used in satellite communications, avionics systems, and autonomous driving, requiring tolerance to harsh conditions such as high and low temperatures and vibration. High-end HDI boards (such as any-layer interconnect boards) can improve device integration.

**Consumer Electronics:** Smartphones, wearable devices, etc., rely on HDI boards to achieve thinness and high performance, supporting high-frequency communication and image processing. Laser-drilled holes (minimum aperture 0.075mm) can meet miniaturization requirements.

Automotive Electronics

Used in ADAS radar, vehicle control systems, and battery management for new energy vehicles, requiring high reliability and resistance to environmental stress. The Tg170 high-temperature resistant substrate can withstand the high-temperature environment of automotive applications.

Industrial and Medical

Industrial Control: High-precision sensors and automated equipment require HDI boards to ensure signal stability.

Medical Electronics: Medical devices rely on HDI boards for high-precision signal acquisition and processing.

Technology Trends

HDI boards are developing towards higher density (linewidth and spacing ≤ 3.5mil) and higher temperature resistance (Tg170 substrate). Manufacturers like ONESEINE PCB have reduced costs by 50% through laser-drilled holes. The military sector focuses more on radiation resistance and long-term reliability.

High Density Interconnect PCB

High aspect ratio PCB (20:1)

Any-layer HDI PCB

Laser drilled microvias

High Tg PCB (Tg170)

Signal integrity PCB