Method for controlling lubricant thickness on thin film, magnetic disk media

A method of enhancing the application of lubricant to the outer surfaces of thin-film, magnetic disk media, said method comprising:

• heating a perfluorohexane solvent for dissolving a disk lubricant to above an ambient temperature to at least about 30.degree. C.;
• dissolving a disk lubricant, comprising a cyclophosphazine material, at an original lubricant concentration in said heated solvent;
• ultrasonically vibrating said heated perfluorohexane solvent containing said cyclophosphazine;
• reducing the temperature of said heated and ultrasonically vibrated solvent containing said dissolved disk lubricant to approximately said ambient temperature, with
• said cyclophosphazine remaining dissolved in said perfluorohexane solvent and substantially free of separation therefrom, and
• said cyclophosphazine remaining dissolved in said perfluorohexane solvent at at least said original concentration level;
• and
• applying said reduced temperature solvent containing said dissolved disk lubricant to an outer surface of a magnetic disk media with
• the concentration of said cyclophosphazine in said perfluorohexane solvent remaining substantially at at least said original concentration;
• said heating and ultrasonic vibration of said perfluorohexane solvent cooperating to
• prevent separation of dissolved cyclophosphazine from said perfluorohexane solvent, and
• thereby permit relatively high amounts of said cyclophosphazine to be applied to said disk media.

A method of enhancing the application of lubricant to the outer surfaces of thin-film, magnetic disk media, said method comprising:

• heating a composite solvent, comprising a perfluorohexane solvent and a fluoropentane solvent, for dissolving a disk lubricant to above an ambient temperature to at least about 30.degree. C.;
• dissolving a composite disk lubricant, comprising a mixture of a cyclophosphazine material and perfluoropolyether, at an original lubricant concentration in said heated composite solvent;
• ultrasonically vibrating said heated composite solvent containing said composite disk lubricant;
• reducing the temperature of said heated and ultrasonically vibrated composite solvent containing said dissolved, composite disk lubricant to approximately said ambient temperature, with
• said composite disk lubricant remaining dissolved in said composite solvent and substantially free of separation therefrom, and
• said composite disk lubricant remaining dissolved in said composite solvent at at least said original concentration level;
• applying said reduced temperature, composite solvent containing said dissolved, composite disc lubricant to an outer surface of a magnetic disk media with
• the concentration of said composite disk lubricant in said composite solvent remaining substantially at at least said original concentration;
• said heating and ultrasonic vibration of said composite solvent cooperating to
• prevent separation of dissolved, composite lubricant from said composite solvent, and
• thereby permit relatively high amounts of said composite lubricant to be applied to said disk media;
• and
• controlling the amount of said composite lubricant applied to said disk media as a function of the relative amounts of perfluorohexane solvent and fluoropentane solvent in said composite solvent.

A method of enhancing the application of lubricant to the outer surfaces of thin-film, magnetic disk media, said method comprising:

• heating a composite solvent, comprising a perfluorohexane solvent and a hydrofluoroether solvent, for dissolving a disk lubricant to above an ambient temperature to at least about 30.degree. C.;
• dissolving a composite disk lubricant, comprising a mixture of a cyclophosphazine material and perfluoropolyether, at an original lubricant concentration in said heated composite solvent;
• ultrasonically vibrating said heated composite solvent containing said composite disk lubricant;
• reducing the temperature of said heated and ultrasonically vibrated composite solvent containing said dissolved, composite disk lubricant to approximately said ambient temperature, with
• said composite disk lubricant remaining dissolved in said composite solvent and substantially free of separation therefrom, and
• said composite disk lubricant remaining dissolved in said composite solvent at at least said original concentration level;
• applying said reduced temperature, composite solvent containing said dissolved, composite disk lubricant to an outer surface of a magnetic disk media with
• the concentration of said composite disk lubricant in said composite solvent remaining substantially at at least said original concentration;
• said heating and ultrasonic vibration of said composite solvent cooperating to
• prevent separation of dissolved, composite lubricant from said composite solvent, and
• thereby permit relatively high amounts of said composite lubricant to be applied to said disk media;
• and
• controlling the amount of said composite lubricant applied to said disk media as a function of the relative amounts of perfluorohexane solvent and hydrofluoroether solvent in said composite solvent.