Product details Production process: The FR-4 copper-clad sheet is made of glass fiber cloth and immersed in resin to form a prepreg. Several prepreg sheets are combined on one side or on both sides with copper foil and cured by hot pressing. Scope of application: The copper clad laminate is used in the manufacture of printed circuit boards (PCBs) in electronic products such as televisions, computers, and communications equipment. Characteristics or advantages: copper foil peel strength, thermal stress, warpage.