Product Description: Multi-layer Circuit Board Board, also known as main board pcb, is a type of Multi-layer Printed Board that is composed of multiple layers of material, with conductive patterns interconnecting them. It is made of a wide range of materials, such as FR-4, TG150-170, Aluminum, and Flexible, to meet specific electrical and mechanical requirements. The min. hole size of the Multi-layer Circuit Board Board is 0.2mm, and the min. line width is 3mil. It is