2024-04-23

          HDI board, full name High Density Interconnect, is a technology for producing printed circuit boards. It uses micro-blind buried via technology to achieve circuit board design with higher circuit distribution density. The following is a comprehensive analysis of the basic knowledge, uses and advantages of HDI boards:

1. Basic knowledge
        HDI board is a compact product designed for small-capacity users. It uses laser drilling technology (sometimes also called laser board). Its drilling hole diameter is generally 3~5mil (0.076~0.127mm), and the line width is generally 3 ~4mil (0.076~0.10mm). Since the size of the pad can be greatly reduced, more circuit distribution can be obtained per unit area, thus achieving high-density interconnection.

2. Purpose
          HDI boards are mainly used as circuit carriers and connectors in electronic products. They can connect electronic components to form electronic circuits, thereby realizing various functions of electronic products. It is widely used in communication equipment, computers, consumer electronics, automotive electronics, medical equipment and other fields. Especially in mobile communication devices (such as smartphones, tablets, etc.) and consumer electronics (such as digital cameras, portable media players, etc.), HDI boards are favored because of their ability to achieve complex circuit design and miniaturization requirements.

3. Advantages
Compared with traditional PCB, HDI board has the following significant advantages:

1.Higher circuit density: HDI boards can support more circuit traces, allowing designers to place more electronic components in limited space.

2.Smaller device spacing: HDI boards’ microvia technology allows for tighter spacing between components, which is critical for achieving compact designs.

3.Improve signal integrity: Due to the advanced stacked layer structure, HDI boards can provide better signal transmission quality and reduce signal interference.

4.Improved reliability: The manufacturing process of the HDI board improves the mechanical strength of the board, making it more durable and suitable for demanding application environments.

       To sum up, HDI boards play a key role in the design of modern electronic products due to their advantages such as high density, high line density, small device spacing, improved signal integrity and improved reliability. With the continuous development of technology, the application prospects of HDI boards will be broader.