What is HDI PCB?
HDI PCB is the abbreviation of high density interconnector PCB. HDI PCB manufacturer makes the HDI board by increased layers through micro-blind&buried vias.
HDI PCB board is a compact product specially designed for small capacity users.
The HDI board includes the following via types:
Microvia PCB: In the PCB industry, vias with a diameter of less than 150um (6mil) are called microvias.
Buried vias: The vias are buried in the inner layer, generally not visible in the finished product.
Blind vias: The blind vias are drills from top layer or bottom layer to a certain inner layer. They are not through the whole HDI board.