Patent ID: 6730403
Filing Date: 2004-05-04
Classification: G11B

Abstract:
A magnetic recording medium comprising in sequential order:a non-magnetic base; a foundation layer; a magnetic layer; a protection layer; and a lubricant layer; said lubricant layer comprising at least one perfluoropolyether lubricant having the following general structural formula (I): wherein n is an integer &gE;1, o is an integer &gE;1, provided that n+o=6; and Rf is selected from the group consisting of: HOâ€”CH2CF2â€”Oâ€”(â€”CF2â€”Oâ€”)qâ€”(CF2CF2â€”Oâ€”)pâ€”CF2CH2â€”, F3Câ€”Oâ€”(â€”CF2â€”Oâ€”)qâ€”(CF2CF2â€”Oâ€”)pâ€”CF2CH2â€”, and F(CF2CF2)3CH2â€”, wherein p is 0 or an integer of 1 or greater, and q is 0 or an integer of 1 or greater.