Abstract: The purpose of the present invention is to provide refined sesame oil comprising a lot of lignans that have various excellent physiological properties from sesame seeds having a high lignan content. The present invention relates to refined sesame oil having a sesamin content of 1% by weight or more and showing no bitterness; a method for the production of refined sesame oil comprising using active carbon as an absorbent in a bleaching step; a method for the production of refined sesame oil comprising controlling a bleaching temperature in a range of from 5 to 70° C. in a bleaching step with the use of activated clay active as an absorbent; and a method for the production of refined sesame oil comprising controlling a bleaching temperature in a range of from 5 to 70° C. in a bleaching step with the use of activated clay of from 0.1 to 3% by weight active as an absorbent.

Abstract: A manufacturing method for a perpendicular magnetic recording head includes the steps of forming a groove in a first nonmagnetic layer, forming a side shield, forming a second nonmagnetic layer, forming a main-magnetic-pole front end portion and forming a main-magnetic-pole yoke portion. The groove extends in a front-rear direction orthogonal to an air bearing surface. The side shield of soft magnetic material, the second nonmagnetic layer and the main-magnetic-pole front end portion of soft magnetic material are formed on an inner wall of the groove. The main-magnetic-pole front end portion is not magnetostatically coupled to the side shield. The main-magnetic-pole yoke portion magnetically is insulated from the side shield and magnetically connected to the main-magnetic-pole front end portion. The main-magnetic-pole yoke portion widens from the main-magnetic-pole front end portion toward a rear side.

Abstract: A magnetic head of the present invention includes a magnetic pole that faces a surface of a recording medium, moves relative to the surface in a direction along the surface, and produces a line of magnetic force intersecting the surface of the recording medium; and a coil that excites the magnetic pole, wherein the magnetic pole includes a laminate with a coercivity of 800 A/m or less, the laminate including two or more layers stacked in a direction along the movement relative to the surface of the recording medium, the two or more layers including a first magnetic layer located at a frontmost position of the movement, and a second magnetic layer located at a rearmost position of the movement, the second magnetic layer having a saturation magnetic flux density higher than a saturation magnetic flux density of the first magnetic layer.

Abstract: The soft magnetic thin film has high saturation magnetic flux density and good soft magnetic characteristics. The soft magnetic thin film of the present invention is formed by electrolytic plating. The plated film is made of FeCo, whose composition is indicated as FexCo1-x (60?x?75 wt %), the FeCo film has a bcc crystal structure, and the crystal of the FeCo film is oriented to a crystal face of (110).

Abstract: A magnetic head includes a magnetic pole placed opposite a surface of a recording medium and moving relatively to the surface in a direction along the surface, the magnetic pole generating a magnetic line of force that crosses the surface of the recording medium, and a coil that excites the magnetic pole. The magnetic pole has a number of layers stacked on one another in a direction along the movement relatively to the surface of the recording medium, and the layers include a most forward layer located at a most forward position of the movement and consisting of a first magnetic material and a most backward layer located at a most backward position of the movement and consisting of a second magnetic material having a saturation magnetic flux density higher than that of the first magnetic material and a coercive force larger than that of the first magnetic material.

Abstract: A perpendicular magnetic head suppresses pole erasing due to a remanent magnetization component of a main pole and is capable of higher density recording. The perpendicular magnetic head is equipped with a main pole that produces magnetic flux toward a medium surface of a recording medium. The main pole is formed by laminating a top thin magnetic layer and a bottom thin magnetic layer in the thickness direction. The top thin magnetic film is formed as a high Bs thin magnetic film with a first saturation flux density and the bottom thin magnetic film is formed as a low Bs thin magnetic film with a second saturation flux density that is lower than the first saturation flux density, and the high Bs thin magnetic film and the low Bs thin magnetic film satisfy the following equation (volume of the high Bs thin magnetic film)×(first saturation flux density) <(volume of the low Bs thin magnetic film)×(second saturation flux density).

Abstract: A perpendicular magnetic head suppresses pole erasing due to a remanent magnetization component of a main pole and is capable of higher density recording. The perpendicular magnetic head is equipped with a main pole that produces magnetic flux toward a medium surface of a recording medium as a write head. The main pole is formed by laminating two thin magnetic layers in the thickness direction. Out of the thin magnetic films, a top thin magnetic film is formed as a high Bs thin magnetic film with a first saturation flux density and a bottom thin magnetic film is formed as a low Bs thin magnetic film with a second saturation flux density that is lower than the first saturation flux density, and the high Bs thin magnetic film and the low Bs thin magnetic film satisfy the following equation (volume of the high Bs thin magnetic film)×(first saturation flux density)<(volume of the low Bs thin magnetic film)×(second saturation flux density).

Abstract: The a method of producing a magnetic head is capable of stabilizing deposition rate of a plated magnetic film forming a magnetic pole of a write-head. The method of producing a magnetic head, in which a magnetic pole of a write-head is constituted by a magnetic film, comprises the steps of: forming a seed layer made of Ru on a surface of a work piece; forming a cap layer on a surface of the seed layer so as to stabilize deposition rate of the magnetic film; and forming the magnetic film by electrolytic plating, and the seed layer and the cap layer are used as power feeding layers for the electrolytic plating.

Abstract: The purpose of the present invention is to provide refined sesame oil comprising a lot of lignans that have various excellent physiological properties from sesame seeds having a high lignan content. The present invention relates to refined sesame oil having a sesamin content of 1% by weight or more and showing no bitterness; a method for the production of refined sesame oil comprising using active carbon as an absorbent in a bleaching step; a method for the production of refined sesame oil comprising controlling a bleaching temperature in a range of from 5 to 70° C. in a bleaching step with the use of activated clay active as an absorbent; and a method for the production of refined sesame oil comprising controlling a bleaching temperature in a range of from 5 to 70° C. in a bleaching step with the use of activated clay of from 0.1 to 3% by weight active as an absorbent.

Abstract: The soft magnetic thin film has high saturation magnetic flux density and superior soft magnetic characteristics, and it can be suitably used as a magnetic film of a magnetic head of a magnetic disk drive unit. The soft magnetic thin film, which is made of an alloy including two or three elements selected from a group consisting of Fe, Co and Ni, is formed by an electrolytic plating process, and internal stress of the plated film is 400 MPa or more.

Abstract: The magnetic thin film has high saturation magnetic flux density and superior soft magnetic characteristics. The magnetic thin film of the present invention comprises: a base layer being made of FeCo/NiFe; and a plated layer being formed on the base layer, the plated layer being made of FeCo.

Abstract: The method of forming a plated pattern is capable of securely narrowing and miniaturizing a resist pattern, which has been hydrophilic-treated, without widening and deforming the resist pattern. The method comprises the steps of: covering a surface of a plating seed layer with resist; exposing and developing the resist so as to form a resist pattern having a concave part; executing a hydrophilic treatment of the resist pattern; piling a metal in the concave part of the resist pattern by plating; removing the resist pattern; and removing an exposed part of the plating seed layer. The plating seed layer is a volatile metal layer made of a metal, which is oxidized during the hydrophilic treatment, and an oxide of the metal constituting the volatile metal layer has volatility.

Abstract: The soft magnetic thin film has high saturation magnetic flux density and good soft magnetic characteristics. The soft magnetic thin film of the present invention is formed by electrolytic plating. The plated film is made of FeCo, whose composition is indicated as FexCo1-x (60?x?75 wt %), the FeCo film has a bcc crystal structure, and the crystal of the FeCo film is oriented to a crystal face of (110).

Abstract: The method is capable of easily and securely forming a NiP nonmagnetic film. In the method of forming the NiP nonmagnetic film by electrolytic plating, the electrolytic plating is performed in NiP plating solution consisting of: a reagent for supplying nickel ions; a reagent for supplying phosphorus ions; and a reagent including carboxyl groups. For example, sulfates and chloride salts of nickel, etc. may be use as the reagent for supplying nickel ions; phosphorus acid, sodium phosphite, etc. may be used as the reagent for supplying phosphorus ions.

Abstract: The magnetic thin film has high saturation magnetic flux density and superior soft magnetic characteristics. The magnetic thin film of the present invention comprises: a base layer being made of FeCo/NiFe; and a plated layer being formed on the base layer, the plated layer being made of FeCo.

Abstract: A thin film magnetic head comprising a substrate, a lower magnetic pole provided on the substrate, a write gap layer located on the lower magnetic pole, and an upper magnetic pole located on the gap layer, the upper magnetic pole including a plating base layer in contact with the gap layer, wherein the plating base layer of the upper magnetic pole is made of a magnetic film having a saturation magnetic flux density of 1.2 T or larger. The thin film magnetic head has an increased recording density, and is adapted to recording at an increased frequency.

Abstract: This invention is to provide a magnetic head consisting of NiFeMo alloy which assures excellent high frequency characteristic and makes easy formation of magnetic domain structure without any heat treatment and thereby contributes to improvement of magnetic recording capability. Magnetic material for a magnetic head includes Ni, Fe and Mo. The composition ratio of NiFeMo is selected under the condition where Ni is 77 to 82 atom %, Fe is 15 to 21 atom %, Mo is under 6 atom %, and magnetic strain constant &lgr;s is in the range of −1×10−6≦&lgr;s ≦10−6.

Abstract: A thin film magnetic head comprising a substrate, a lower magnetic pole provided on the substrate, a write gap layer located on the lower magnetic pole, and an upper magnetic pole located on the gap layer, the upper magnetic pole including a plating base layer in contact with the gap layer, wherein the plating base layer of the upper magnetic pole is made of a magnetic film having a saturation magnetic flux density of 1.2 T or larger. The thin film magnetic head has an increased recording density, and is adapted to recording at an increased frequency.

Abstract: A magnetoresistive head in which an antiferromagnetic material having superior corrosion resistance is used is disclosed. In the magnetoresistive head, a pair of anti-ferromagnetic layers 24a and 24b are formed while contacting with a soft magnetic layer 23, and the antiferromagnetic layers 24a and 24b are made of a PdMn film.

Abstract: A magnetoresistive head in which an antiferromagnetic material having superior corrosion resistance is used is disclosed. In the magnetoresistive head, a pair of anti-ferromagnetic layers 24a and 24b are formed while contacting with a soft magnetic layer 23, and the antiferromagnetic layers 24a and 24b are made of a PdMn film.