What application scenarios are high-end HDI boards suitable for? Why are mobile phones, medical equipment and automotive electronics unable to do without them?

In today's era where electronic products are constantly evolving towards miniaturization, high performance, and intelligence, traditional PCBs have become inadequate for meeting the demands of complex circuit designs. Especially in fields such as smart phones, new energy vehicles, medical equipment, artificial intelligence hardware, and 5G communication devices, high-end HDI boards are gradually becoming the mainstream choice.

So, for what application scenarios are high-level HDI boards suitable? And why are more and more high-end electronic products unable to do without them? This article will provide a detailed analysis from three aspects: industry applications, technical advantages, and actual demands.

What is a high-level HDI board?

HDI (High Density Interconnect) refers to a high-density interconnection circuit board.

High-end HDI boards usually refer to:

Structures above the third-order HDI level

Multi-layer blind-buried hole design

Laser micropore technology

Any Layer HDI (Interconnection Technology at Any Layer)

Compared with ordinary PCBs, high-order HDI boards have:

Higher wiring density

Smaller aperture size

Shorter signal transmission path

Stronger high-speed signal processing capability

Therefore, it is possible to integrate more functions within a limited space.

Which application scenarios are suitable for high-level HDI boards?

From the current market situation, high-level HDI boards are mainly applied to the following types of high-end electronic products.

Smartphones and consumer electronics

This is one of the most widely applied fields for high-grade HDI boards.

Typical products include:

Smartphone

Tablet computer

Smartwatch

AR glasses

VR equipment

Wireless headphones

As electronic products continue to become thinner and lighter, the number of internal components has been steadily increasing.

For example, a flagship mobile phone usually integrates:

Application Processor

Storage chip

5G baseband

WiFi module

Bluetooth module

Camera module

Power Management System

These devices need to achieve high-speed connections within an extremely small space.

Ordinary PCBs are unable to meet such high-density wiring requirements, while advanced HDI boards can achieve high-integration designs by utilizing micro-holes and multi-layer interconnection structures.

Medical electronic equipment

Modern medical equipment is developing towards digitalization and portability.

Common applications include:

Medical monitoring instrument

Ultrasound diagnostic equipment

Electrocardiogram detection equipment

Endoscopic system

Wearable medical devices

Medical imaging equipment

Medical equipment has two notable features:

High reliability requirements

The equipment needs to operate stably for an extended period.

Any line failure may affect the test results.

The demand for miniaturization,

especially in portable medical products.

More functional modules need to be integrated within a limited space.

High-level HDI boards not only enhance the integration level, but also improve the line stability and anti-interference capability.

Therefore, it has become an important basic material in the field of medical electronics.

Automotive electronic systems

The development of new energy vehicles has made cars into large-scale intelligent electronic platforms.

An electric vehicle may contain hundreds of circuit boards inside.

High-end HDI boards are mainly applied in:

ADAS Advanced Driver Assistance System

Includes:

Millimeter-wave radar

Camera Control Module

Automatic parking system

Intelligent Cockpit

Including:

Central Control System

HUD Head-Up Display

Intelligent voice system

Battery Management System (BMS)

is responsible for monitoring:

Voltage

Current

Temperature

The autonomous driving domain controller needs to handle a large amount of high-speed data.

High-level HDI boards can meet the following requirements:

High-frequency signal transmission

High reliability operation

Anti-vibration requirements

Therefore, it has become an important carrier of automotive electronics.

Communication equipment and 5G infrastructure

The 5G era places higher demands on PCB performance.

Application scenarios include:

5G base station

Optical communication equipment

High-speed switch

Router

Data center equipment

These devices generally encounter:

High speed

High-frequency band

Big data transmission

Deal with the technical challenges.

High-level HDI boards can shorten the signal path, improve impedance control accuracy, and thereby reduce signal loss.

AI servers and data centers

The development of artificial intelligence training and cloud computing has driven the growth in demand for high-performance servers.

AI servers usually come equipped with:

GPU

AI acceleration chip

High-speed storage module

These chips require high-speed interconnection among them.

High-level HDI boards can offer:

Ultra-high wiring density

High-speed differential line design

Precise impedance control

Meet the demand for large-scale data processing.

Why are mobile phones inseparable from high-end HDI boards?

Mobile phones represent the most typical application scenario for high-end HDI boards.

The reasons can be mainly divided into three aspects.

The space is becoming increasingly limited.

Nowadays, the thickness of mobile phones is generally controlled at:

Around 7 millimeters

However, the functions have become increasingly diverse.

For example:

Multi-camera system

5G communication module

Large-capacity battery

Wireless charging

All these functions require occupying internal space.

High-level HDI boards can enhance the wiring capacity per unit area, thereby saving space.

The number of chip pins is constantly increasing.

High-performance processors adopt high-density BGA packaging.

For example:

AI processor

Mobile SoC

Storage chip

The number of pins can often reach several hundred.

High-level HDI boards can achieve complex pin-out designs by utilizing microporous technology.

The demand for high-speed signals has increased.

What is involved inside the mobile phone:

5G signal

WiFi 7

High-speed camera data

These signals have extremely high requirements for the design of the circuit.

High-level HDI boards can reduce crosstalk and signal loss.

Why are medical devices increasingly relying on high-end HDI boards?

The most important factor for medical devices is reliability.

For example:

The electrocardiogram monitor needs to operate continuously for 24 hours.

The ultrasound equipment requires precise signal collection.

If there is an anomaly in the line:

It may directly affect the diagnosis result.

The high-level HDI board has:

Higher conduction reliability

Lower failure rate

Greater anti-interference capability

It can meet the strict standards of the medical industry.

At the same time, the development of portable medical equipment also requires a more integrated design.

Therefore, the demand for high-end HDI boards continues to increase.

Why are high-order HDI boards widely used in automotive electronics?

Automotive electronics is undergoing a transformation from mechanization to intelligence.

The autonomous driving system needs to process information in real time:

Camera image

Radar data

Lidar information

The volume of data is extremely large.

High-level HDI boards can support:

High-speed computing platform

Collaborative operation of multiple chips

High-frequency communication system

In addition, the automotive environment is complex.

Needs to be faced:

High temperature

Low temperature

Damp heat

Vibration

The high-level HDI board can meet the automotive-grade reliability requirements by optimizing the interlayer structure and material selection.

Which industries will further drive the growth of high-end HDI board demand in the future?

The fastest-growing areas in the future market mainly include:

Artificial Intelligence Terminal For example:

AI PC

AI mobile phone

AI robot

Autonomous vehicles

As L3 and L4 level autonomous driving becomes more widespread, the number of high-performance controllers will continue to increase.

Medical intelligent equipment

Remote medical and intelligent monitoring devices will drive the demand for miniaturized HDI boards.

Satellite communication and avionics

High-reliability and high-density electronic systems require more advanced PCB support.