摘要:
A process for producing a master carrier contains steps of: forming a desired pattern on a support to form a resist pattern support; forming a first ferromagnetic thin film on the resist pattern support by a vacuum film forming method; forming a third ferromagnetic thick film on the first ferromagnetic thin film by an electroplating; and peeling the support from the resist pattern support provided with the first ferromagnetic thin film and the third ferromagnetic thick film.
摘要:
In a method for producing a multilayer magnetic recording medium having at least three coating layers on a side of a magnetic recording layer side, the at least three coating layers are formed on the magnetic layer side at least two times dividedly.
摘要:
A ceramic heat exchanger includes a heat exchange section that heat-exchanges between two fluids A and B flowing opposite directions to each other. The heat exchange section includes ceramic blocks stacked one on top of another with a seal therebetween. The ceramic blocks have a plurality of parallel lines of flow channels, each line defined by the flow channels through which the same fluid flows, any two adjacent lines being defined by the flow channels through which the different fluids A and B flow respectively. Both ends in the stacking direction of the stack are bound to join and integrate the ceramic blocks with tightening means including end plates and a tie rod. A thermal expansion absorber is disposed on an external surface of the end plates for absorbing thermal expansion in the axial direction of the tie rod.
摘要:
The present invention provides a magnetic transfer master disk comprising: a master substrate formed by a metal plate, on a surface of which a protruding and recessed pattern corresponding to transfer information is transferred by electroforming, the metal plate being composed of two or more electroforming layers that are different from each other in crystal orientation; and a magnetic layer formed on the protruding and recessed pattern of the master substrate in order to eliminate warpage and distortion of the master disk even if the close contact pressure is increased during transferring magnetic information such as format information to a magnetic disk used in a hard disk device and the like.
摘要:
The present invention provides a method of manufacturing a master disk for magnetic transfer, comprising the steps of: forming a metal plate having a predetermined thickness on an original plate having a concavo-convex pattern corresponding to information to be transferred; stamping the metal plate separated from the original plate to form a center opening and a circular rim, thereby providing a master substrate; and depositing a magnetic layer on the concavo-convex pattern of the master substrate, wherein a region at the upper edge of the center opening where a roll off occurs when the center opening of the master substrate is formed by stamping is defined as a center-opening roll-off region, a predetermined range of center-opening buffer region is provided outside of the center-opening roll-off region, and the concavo-convex pattern is formed outside of the center-opening buffer region.
摘要:
A magnetic recording medium includes a support, and a single magnetic layer having a thickness of 0.3 &mgr;m or less, which contains nonmagnetic particles. In the magnetic medium, the thickness of the single magnetic layer is equal to or larger than an average particle diameter of the nonmagnetic particles.