Title :
Improvement of durability and corrosion resistance of metal evaporated tape with chemically deposited SiOx overcoat
Author :
Daimon, H. ; Sugiyama, Y. ; Ichijo, M. ; Mizumura, T.
Author_Institution :
Tsukuba Res. Lab., Hitachi Maxell Ltd., Ibaraki, Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
To improve the reliability of metal evaporated tape (ME tape), SiO x overcoat was investigated. The durability of ME tape overcoated with SiOx was greatly improved by lubricating with C18H37OP(H)(O)OH (mono octadecyl phosphite: MOP), which showed more than 10 hours life time in a still mode durability test (relative speed of head to media: 11.3 m/s). Since MOP was solid at room temperature, adhesion did not occur and friction force during the test reduced by 25% compared with perfluoropolyether liquid lubricant. Corrosion of ME tape was prevented by SiOx overcoat prepared by plasma enhanced chemical vapor deposition (PECVD). Water transmission rate of PECVD-SiOx was one tenth that of physically deposited SiOx, which suppressed surface corrosion of ME tape in an atmosphere of 60°C 90%R.H. and of 4 ppm SO2 (40°C 80%R.H.)
Keywords :
corrosion protective coatings; corrosion testing; digital magnetic recording; lubrication; magnetic recording; magnetic tapes; plasma CVD coatings; silicon compounds; wear resistant coatings; wear testing; 10 hour; 11.3 m/s; 40 C; 60 C; SiO; chemically deposited SiOx overcoat; corrosion resistance; durability; friction force; life time; metal evaporated tape; mono octadecyl phosphite lubricant; plasma enhanced chemical vapor deposition; still mode durability test; surface corrosion suppression; water transmission rate; Adhesives; Chemical vapor deposition; Corrosion; Friction; Life testing; Lubricants; MONOS devices; Plasma chemistry; Plasma temperature; Solids;
Journal_Title :
Magnetics, IEEE Transactions on
