The same technology as C-4 except the IC is mounted in an intermediate carrier (ceramic or FR-4) using conventional technology, and the chip carrier, having the solder balls, is mounted directly to the substrate and reflowed.
C-5 (CONTROLLED COLLAPSE CHIP CARRIER CONNECTION)
Meaning of C-5 (CONTROLLED COLLAPSE CHIP CARRIER CONNECTION) in English
Electronics Terminology English vocabulary. Английский словарь терминологий электроники. 2012