What kind of PCB board is called high frequency board? What kind of PCB board is called HDI board?

From China PCB Manufacturer: What kind of PCB circuit board is called high frequency circuit board? What kind of PCB circuit board is called HDI circuit board? What is the difference between them and ordinary double sides PCB circuit board?

The high-frequency PCB circuit board is usually laminated with FR4 fiberglass PCB circuit board, and is pressed by a whole piece of epoxy glass cloth. The whole PCB circuit board is uniform and bright in color. The density is larger than the low frequency PCB circuit board. Generally, high frequency PCB circuit boards are used in PCB circuit board with a frequency of 1 G or more. Its dielectric constant is the key, it must be small and stable, the dielectric loss is small, and it is not easy to absorb moisture, moisture, corrosion and other excellent properties.

The HDI PCB circuit board is a high-density interconnect (High Density Interconnect), which uses a micro-blind buried hole technology to provide a telephone PCB circuit board with a relatively high density of line distribution. It is a compact product designed for small-volume users. HDI PCB circuit board adopts modular parallel design, a module capacity of 1000VA (1U height), natural cooling, can be placed directly into the 19" rack, and can be connected in parallel with up to 6 modules. HDI PCB circuit board uses full digital signal process control (DSP) technology and more The patented technology has full range of adaptability to load capacity and strong short-term overload capability.

Many common PCB printed circuit boards are made of low-end materials, such as paper substrates, composite substrates, epoxy boards (also known as 3240 epoxy boards, phenolic boards), and FR-4 glass fiber PCB circuit boards (separation PCB circuit boards). Paper substrate and composite substrate.

A high-frequency signal line on the printed circuit board or a PCB with a high-frequency line is a high-frequency PCB circuit board;

The HDI PCB circuit board refers to a class in which the lines in the PCB circuit board are relatively dense. The PCB circuit board traces such as mobile phones and computer motherboards are thin and closely spaced. The PCB circuit board is now moving in this direction.

Ordinary double-sided is mainly that there is no special kind of PCB circuit board for routing and signal.