Definitions for "Prepreg"
Ready to mold or cure material in sheet form which may be tow, tape, cloth, or mat impregnated with resin. It may be stored before use.
Non-conducting semi-cured layers of FR4 used to separate conducting layers in a multilayer circuit board.
Sheet material (e.g. glass fabric) impregnated with a resin cured to a B-stage.