What are printed circuit boards made of?

Generally,there are the below kinds materials for printed circuit boards:

1. Rigid phenolic resin laminate sheet of paper substrate CCL FR-1 economy, flame retardant

2. FR-2 high electrical resistance, flame (cold red)

3. Epoxy copper clad board FR-3 high electrical resistance, flame retardant

Polyester resin copper clad board

4. Glass cloth plate glass cloth - epoxy copper clad FR-4 board

5. Heat-resistant glass cloth - epoxy copper clad board FR-5 G11

6. Glass cloth - polyimide resin copper clad board GPY