PCB fiber glass tissue is specially used as the base material in the copper-clad laminate of type CEM-3. This type of tissue is characterized by its smooth visual quality, excellent electrical feature and heat resistance. Being uniquely compatible to epoxy resin matrix, this type of mat enables the CCL product to reach the specifications set by IPC-4130 and comparable to that made of fiber glass woven roving. Applicable to industrial electronic devices, CCL with fiber glass tissue base is well received by the market because of its processability by punching and drilling. The successful application by the CCL producers has proven that the PCB tissue developed by this company is comparable to similar products in the world market in terms of physical and chemical properties and is reliable in the CCL production.