Pin-on-disk wear study on thin-film disks for contact recording systems

The main subjects to be solved for realizing contact recording systems are the reduction of head wear and head vibration. To reduce head wear, we investigated pin wear on various thin-film disk surfaces. We compared the effects of roughness of disk surfaces and molecular weight (MW) of lubricants. The results showed that the pin wear became larger as the lubricant MW became smaller or the disk roughness became large. In addition, we found the tape burnishing of disk surfaces was effective in pin wear reduction. From above, we developed sliding condition models on thin-film disks.