A BGA package on a copper polyimide base like TAB , except TAB leads are replaced by an area array ball grid for interconnects. A stiffener is added to ensure flatness for the mass reflow assembly process.
TAPE BALL GRID ARRAY (TBGA)
Meaning of TAPE BALL GRID ARRAY (TBGA) in English
Electronics Terminology English vocabulary. Английский словарь терминологий электроники. 2012