PCB substrate material

PCB substrate material

We often refer to "FR-4" as a code for a fire-resistant material grade, which represents a material specification in which resin materials must be able to self extinguish after combustion. It is not a material name, but a material grade. Therefore, currently there are many types of FR-4 grade materials used in general circuit boards, but most of them are composite materials made of so-called Tera Function epoxy resin, filler, and fiberglass. You can choose materials based on product characteristics and requirements.

There are two main types of printed circuit board substrates: organic substrate materials and inorganic substrate materials, with organic substrate materials being the most commonly used. The PCB substrate used varies depending on the number of layers. For example, 3-4 layer boards require prefabricated composite materials, while double-sided boards mostly use glass epoxy resin materials