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公开(公告)号：DE69227013T2
公开(公告)日：1999-06-02
申请号：DE69227013
申请日：1992-12-07
Applicant: IBM
Inventor： FRANCO LUIS PADILLA , KAUFMAN JAMES HARVEY , METIN SERHAT , PALMER DANNY DEAN , SAPERSTEIN DAVID DORN , WU ANTHONY WAI
Abstract: A thin film metal alloy magnetic recording disk has a protective nitrogen-containing carbon overcoat which is thinner and which exhibits better wear resistance, corrosion resistance, and hardness than conventional carbon overcoats without nitrogen. The nitrogen present in the disk overcoat substantially reduces the film stress. Because of the low stress of the overcoat film there is significantly less likelihood that the overcoat will delaminate, buckle, or otherwise wear away from the underlying magnetic layer during operation of the disk file. This allows for significantly reduced overcoat thickness, thus reducing the head-disk spacing in the disk file. The overcoat, even though significantly thinner than prior art carbon overcoats, exhibits better wear and corrosion resistance than carbon overcoats without nitrogen. In addition, when the carbon overcoat contains hydrogen, the presence of the nitrogen increases the hardness of the film if present in a specific amount dependent on the amount of hydrogen present.
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公开(公告)号：DE69227013D1
公开(公告)日：1998-10-22
申请号：DE69227013
申请日：1992-12-07
Applicant: IBM
Inventor： FRANCO LUIS PADILLA , KAUFMAN JAMES HARVEY , METIN SERHAT , PALMER DANNY DEAN , SAPERSTEIN DAVID DORN , WU ANTHONY WAI
Abstract: A thin film metal alloy magnetic recording disk has a protective nitrogen-containing carbon overcoat which is thinner and which exhibits better wear resistance, corrosion resistance, and hardness than conventional carbon overcoats without nitrogen. The nitrogen present in the disk overcoat substantially reduces the film stress. Because of the low stress of the overcoat film there is significantly less likelihood that the overcoat will delaminate, buckle, or otherwise wear away from the underlying magnetic layer during operation of the disk file. This allows for significantly reduced overcoat thickness, thus reducing the head-disk spacing in the disk file. The overcoat, even though significantly thinner than prior art carbon overcoats, exhibits better wear and corrosion resistance than carbon overcoats without nitrogen. In addition, when the carbon overcoat contains hydrogen, the presence of the nitrogen increases the hardness of the film if present in a specific amount dependent on the amount of hydrogen present.
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公开(公告)号：SG47386A1
公开(公告)日：1998-04-17
申请号：SG1996000407
申请日：1992-12-07
Applicant: IBM
Inventor： FRANCO LUIS PADILLA , KAUFMAN JAMES HARVEY , METIN SERHAT , PALMER DANNY DEAN , SAPERSTEIN DAVID DORN , WU ANTHONY WAI
Abstract: A thin film metal alloy magnetic recording disk has a protective nitrogen-containing carbon overcoat which is thinner and which exhibits better wear resistance, corrosion resistance, and hardness than conventional carbon overcoats without nitrogen. The nitrogen present in the disk overcoat substantially reduces the film stress. Because of the low stress of the overcoat film there is significantly less likelihood that the overcoat will delaminate, buckle, or otherwise wear away from the underlying magnetic layer during operation of the disk file. This allows for significantly reduced overcoat thickness, thus reducing the head-disk spacing in the disk file. The overcoat, even though significantly thinner than prior art carbon overcoats, exhibits better wear and corrosion resistance than carbon overcoats without nitrogen. In addition, when the carbon overcoat contains hydrogen, the presence of the nitrogen increases the hardness of the film if present in a specific amount dependent on the amount of hydrogen present.
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公开(公告)号：DE3374217D1
公开(公告)日：1987-12-03
申请号：DE3374217
申请日：1983-07-04
Applicant: IBM
Inventor： BELLAR ROBERT JAMES , GOLDEN WILLIAM GLEN , SAPERSTEIN DAVID DORN , VATS ASHOK
Abstract: Method and apparatus for simultaneously recording multiple Fourier Transform Infrared (FT-IR) signals. The analog signals from an interferometer are coupled to switching means which is operable in response to a first control signal for synchronizing the operation of the interferometer and a second control signal for defining data acquisition intervals to direct the sampled data of the analog input signals over a circuit path including Sample and Hold and Analog to Digital Conversion circuits to a processor for storing the digital data corresponding to the analog input signals. The switching means is operated so that samples of the analog input signals are taken in sequence and stored in sequential storage locations in interleaved fashion. The processor is operable under program control to access the digital data so that all data samples for the same input signals are separated to produce an interferogram for each of the input signals. These interferograms can then be Fourier transformed to produce spectra in the usual manner.
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