Boards built with a metallic core and an organic or inorganic insulation on either sides of the core. The core could be made of steel, stainless steel, aluminum, copper, or a laminate of metals (in most cases copper invar copper or copper tungsten copper). The insulation of the core is done prior to metallization.
METAL-CORE BOARDS
Meaning of METAL-CORE BOARDS in English
Electronics Terminology English vocabulary. Английский словарь терминологий электроники. 2012