PCB Technical - Advantages and application areas of hdi pcb

What is HDI pcb?It is a high-density circuit board with a high wire distribution density,which plays a vital role in modern electronic devices.

Generally speaking, HDI circuit boards have the following advantages:

1.It can reduce the cost of PCB: When the density of PCB increases beyond eight-layer board, it is manufactured with HDI PCB, and its cost will be lower than that of traditional and complex pressing process.

2.Increase circuit density: The interconnection of traditional pcb boards and parts must be connected through the lines and through-hole conductors drawn around the QFP as the connection method (fan-in and fan-out), so these lines need to occupy some space hdi circuit board.The microvia technology can hide the wiring required for interconnection to the next layer. The bonding pads and leads between different layers are directly connected by blind holes in the pads, without fan-in and fan-out wiring. Therefore, some soldering pads (such as mini-BGA or CSP small ball soldering) can be placed on the outer board surface to accept more parts, which can increase the density of the circuit board. At present, many mobile phone boards of high-function small wireless phones use this new type of stacking and wiring method.

3.Conducive to the use of advanced assembly technology: The general traditional drilling technology cannot meet the needs of small parts of the new generation of fine circuit hdi circuit boards due to the size of the pad (through hole) and mechanical drilling. With the advancement of microvia technology, designers can design the latest high-density IC packaging technologies, such as Arraypackage, CSP, and DCA (DirectChipAttach), into the system.

4.Have better electrical performance and signal accuracy: The use of microvia interconnection can not only reduce signal reflection and crosstalk interference between lines, and enable the PCB circuit design to increase more space, due to the microvia The nature of the physical structure is that the holes are small and short, so the effects of inductance and capacitance can be reduced, and the switching noise during signal transmission can also be reduced.

5.Better reliability: because of the thinner thickness and 1:1 aspect ratio of the micro-hole, the reliability of signal transmission is higher than that of ordinary through-hole hdi circuit boards.

6.Improved thermal properties: The insulating dielectric materials of HDI boards have a higher glass transition temperature (Tg), so HDI circuit boards have better thermal properties.

7.It can improve radio frequency interference/electromagnetic wave interference/electrostatic discharge (RFI/EMI/ESD): the micro-hole technology allows the circuit board designer to shorten the distance between the ground layer and the signal layer to reduce radio frequency interference and electromagnetic wave interference; on the other hand, it can Increase the number of ground wires to avoid instantaneous discharge of parts in the circuit due to static electricity accumulation, and damage to the hdi circuit board.

8.Improve design efficiency: The micro-hole technology allows the circuit to be arranged on the inner layer, so that the circuit designer has more design space, so the efficiency of circuit design can be higher for hdi printed circuit boards.

Application Fields

1.5G communication field: with the continuous advancement of 5G technology, the requirements for high-speed and high-frequency signal transmission are getting higher and higher.The high integration and excellent signal transmission performance of HDI circuit boards make them ideal for 5G base stations, RF modules and other equipment.

2.Smart wearable field: the emergence of smart watches, smart glasses and other smart wearable devices has brought convenience to people's lives. And the small size and thin and light design of HDI pcb provides better integration and reliability for these devices.

3.Medical device field: In the field of medical devices,they are more and more widely used. It can be used in medical monitors, surgical instruments and other equipment to provide accurate data acquisition and transmission, providing better diagnosis and treatment for medical workers.

4.Automotive electronics: With the continuous advancement of automotive electronics,they are increasingly used in the field of automotive electronics. It can be used in car navigation systems, car entertainment systems and other equipment to provide stable signal transmission and efficient data processing capabilities.

5.Industrial control field: In the field of industrial automation,they can be used in PLC (Programmable Logic Controller), sensors and other equipment to provide efficient data exchange and control capabilities to improve the degree of automation of industrial production.

6.Artificial Intelligence: With the rapid development of artificial intelligence technology, the requirements for computing power and storage capacity are getting higher and higher. HDI circuit boards, with their high integration and high performance, provide powerful computing and storage support for artificial intelligence devices.

7.Internet of Things: The rise of the Internet of Things enables various devices to connect and communicate with each other.And HDI pcb board, as the key component for connecting different devices, provide a reliable foundation for the development of Iot.

With the continuous progress of science and technology, HDI pcb, with their high integration, excellent performance and reliability, show an increasingly important position in the electronics industry. In the future, it will shine in more high-end applications and promote the continuous development of electronic technology. We look forward to more innovative breakthroughs to help the progress of science and technology.