How is HDI PCB defined?

How is HDI PCB defined?
HDI is an abbreviation for high-density interconnects. HDI PCB is defined as the PCB with a higher wiring density per unit area than traditional PCB. They have thinner lines and space, smaller vias, capture pads, and higher connection pad densities than conventional PCB technologies. HDI PCB is used to reduce size and weight, and to improve electrical performance of the equipment. 
HDI PCB is made through microvia and buried holes and ordered layers lamination with insulating material and conductor wiring, to achieve more high-density wiring. For high-rise and high-cost laminated board, HDI PCB is a better choice.
For high-speed signal electrical requirements, PCB must have impedance control, high-frequency transmission capacity and some other AC characteristics, reduce unnecessary radiation. The structure of strip line and microstrip line needs multilayer design. In order to solve the quality problem of signal transmission, the insulation material with low dielectric constant and low attenuation rate is applied. For the miniaturization of electronic components and arrays, it is necessary to improve the density of the PCB. With the result of the ball grid array, the chip size package and the method of the direct patch assembly, the PCB has an unprecedented density. Holes less than 150um in diameter are called Microvia. It can improve assembly efficiency and space utilization, and so on.

Here are a lot of different names for PCB with such a structure. For example, it is called SBU (Sequence establishment process) in European and American industries, known as the MVP in Japanese industry (Microvia Process). Because the holes in this kind of product are much smaller than before. It is also known as the BUM (build up multilayer Board) because the traditional multilayer panels are called MLB (multilayer panels). To avoid confusion, the IPC PCB Association proposes to refer to it as an HDI (high-density interconnect technology) as a universal name, but it does not reflect the characteristics of the board. So the majority of PCB industry companies define such products as HDI PCB.
HDI PCB has many advantages, such as small size, fast speed, high frequency. It is the main component of personal computer, laptop, mobile phone and personal digital assistant. Currently, in addition to mobile phones, HDI PCB is also widely used in a variety of other consumer products, such as game consoles and MP3, etc. 
The higher density allows for additional functionality per unit area. These types of faceted structures provide the required cabling resolution for large pin chips for mobile devices and other High-tech product.
Because of the small size of the consumer electronic terminal product, this trend has promoted the growth of the smaller HDI PCB manufacturing market. Due to the growing demand for HDI PCB, Vip Circuit has been serving more and more customers who are in different industry, including:
Car (engine control unit, GPS, instrument panel Electronics)
Computers (laptops, Tablet PCs, wearable electronic devices, Internet of things-IoT
Communications (mobile, module, router, switch)
Digital (camera, audio, video)

For more details and HDI technologies please contact us, we will offer personalized and attentive services.