MULTI-LEVEL NONVOLATILE MEMORY DEVICE, PROGRAM METHOD THEREOF, AND FABRICATING METHOD THEREOF

摘要

A multi-level nonvolatile memory device, a program method thereof, and a fabricating method thereof are provided to heighten the reliability of the program operation by forming a plurality of bottom electrodes on the top of the substrate. A plurality of bottom electrodes(110) are formed on a substrate(100). The first insulating layer pattern(120) comprises a plurality of first openings(122) which are formed on the top of the substrate, and open a plurality of bottom electrodes. A plurality of bottom electrode contacts(130) are formed inside the first openings and on the bottom electrodes. A plurality of phase change material patterns(140) are formed inside the plurality of first openings and on the plurality of bottom electrode contacts. A plurality of upper electrode contacts(150) are formed on a plurality of phase change material patterns. The second insulating layer pattern(160) is formed on the first insulating layer pattern and the plurality of upper electrode contacts.