With HDI boards, you can affix more components on both sides of the bare PCB, allowing you to get more functionality in a smaller space and expand the overall functionality of your device. HDI technology enables you to add functionality while reducing the size and weight of your product.
HDI technology in printed circuit boards and other areas has been a critical driver for developing many of the electronics we use today, especially those that have decreased substantially in size and weight in recent years. The smaller the equipment gets, the more likely it is to employ HDI technology