Mold release sheet are used in sheet assisted molding processes. It helps to reduce flash burr in molding QFN packages.

• Flat molding surface can be given, because of reducing the wrinkle in loading the sheet and in clamping the mold.
• The surface layer of special material sticks to the substrates and the terminals, etc.
• Therefore, the sheet protects the invasion of the epoxy molding compounds, the flash is prevented.