This invention relates to the field of
microelectronics and
integrated circuit materials technology, specifically a method for rapidly preparing Mo-C-based interconnect thin film materials at
room temperature. Addressing the problems of decreased
conductivity and insufficient
thermal stability caused by natural oxidation in traditional
copper-based interconnect materials at technology nodes of 7 nm and below, this invention proposes
molybdenum-based interconnect materials as an alternative. This invention achieves controllable and rapid preparation of high-quality
molybdenum-carbon compound thin films on
silicon substrates using magnetron
sputtering technology. The key is the precise control of parameters such as
sputtering power, carbon content, and working
gas pressure, successfully preparing high-quality films with different phase structures (including MoC, Mo3C2, and Mo2C). Experimental results show that the optimized 60 nm thick Mo2C film can achieve a resistivity as low as 5.53 μΩ·cm at
room temperature and maintains excellent electrical properties after high-temperature annealing at 400–600℃. This provides a key material solution for next-generation
integrated circuit interconnect
layers and has significant application prospects.