The basic types of chip LEDs are:
SMD (Surface mounted diode) is a standalone chip on a ceramic base that can be integrated into various packages for linear LED strips or downlights.
COB (chip on board) LED, which comes as a high powered chip in direct contact with a printed circuit board optimal thermal management.
MCOB (multiple chips on board) LEDs, which are multiple COB LEDs integrated to form a single chip. This technology is used in LED bulbs and tubes.
MCCOB (multiple chips and cups on board) packages, which are used for high bay fixtures and floodlights.