Researchers at the National University of Singapore have developed a novel, ultra-thin carbon coating for hard drives, measuring just 0.8 nanometers thick, which is approximately one-third the thickness of current 2.5-nanometer coatings. This new material, termed MAC (monolayer amorphous carbon), is grown directly onto commercial hard drive media using a laser and plasma process at around 300 degrees Celsius, without damaging the magnetic layer or surface structure. The MAC coating offers comparable corrosion protection to existing layers and demonstrates excellent thermal stability, even under conditions simulating heat-assisted magnetic recording (HAMR) at 450 degrees Celsius. This breakthrough has the potential to significantly reduce the distance between the read/write heads and the magnetic layer, a critical factor for increasing hard drive storage capacity, and the process is scalable for industrial application.