摘要:
A thin-film magnetic head includes a slider substrate and a write element. The slider substrate has an air bearing surface at one side thereof. The write element has a recording magnetic pole film. The recording magnetic pole film is disposed on a plane crossing the air bearing surface over the slider substrate and has a large-width portion and a small-width portion continuously arranged in the named order toward the air bearing surface. The small-width portion has a smaller width than the large-width portion. Of the large-width portion and the small-width portion, at least the small-width portion has a first portion and a second portion. The second portion is continuous with an upper end of the first portion and has both side faces inclined in such a direction as to increase the width. An external angle of the first portion formed by a plane parallel to a bottom face and the side face is larger than an external angle of the second portion formed by a plane parallel to the bottom face and the side face.
摘要:
A method for manufacturing a thin-film magnetic head includes processes of forming a polishing position sensor and a recording head portion alongside on one side of a wafer. The process of forming the recording head portion has a step of performing a photolithography process after applying an alkali soluble resin film and a photoresist film in the named order. The process of forming the polishing position sensor has a step of performing a photolithography process on the photoresist film while having only the photoresist film out of the alkali soluble resin film and the photoresist film.
摘要:
A method of forming a magnetic pole section of a perpendicular magnetic recording type thin-film magnetic head and a method of manufacturing a perpendicular magnetic recording type thin-film magnetic head that include forming on an under layer a resist pattern having an opening, forming a first nonmagnetic layer, forming a first magnetic layer forming a magnetic layer pattern, removing the resist pattern and then applying a resist layer onto a first nonmagnetic layer and a magnetic layer pattern, developing or ashing partway the applied resist layer and baking the remaining resist layer, removing the first nonmagnetic layer from at least a side surface of the magnetic layer pattern by etching with the baked resist layer being left, removing all of the resist layer and then forming a second nonmagnetic layer on at least the magnetic layer pattern, and forming a second magnetic layer on the formed second nonmagnetic layer.
摘要:
A manufacturing method for a magnetic head includes the steps of: forming a structure on a lower shield, the structure including a lower gap, a main magnetic pole and first and second side gaps; forming first and second side shields; forming an upper gap; and forming an upper shield. In the step of forming the structure, an initial lower gap layer is formed on the lower shield, the initial lower gap layer including a pre-lower-gap portion, and two to-be-removed portions that are located on opposite sides of the pre-lower-gap portion. Then, a protrusion including the main magnetic pole and the first and second side gaps is formed on the pre-lower-gap portion. With the top surface of the protrusion covered with a mask, the initial lower gap layer is etched in part to thereby form the lower gap.
摘要:
A manufacturing method for a magnetic head includes the steps of; forming a structure on a lower shield, the structure including a lower gap, a main magnetic pole and first and second side gaps; forming first and second side shields; forming an upper gap; and forming an upper shield. In the step of forming the structure, an initial lower gap layer is formed on the lower shield, the initial lower gap layer including a pre-lower-gap portion, and two to-be-removed portions that are located on opposite sides of the pre-lower-gap portion. Then, a protrusion including the main magnetic pole and the first and second side gaps is formed on the pre-lower-gap portion. With the top surface of the protrusion covered with a mask, the initial lower gap layer is etched in part to thereby form the lower gap.
摘要:
The present invention relates to a method for manufacturing a perpendicular recording magnetic head. The method for manufacturing a perpendicular recording magnetic head according to the present invention includes first to third steps. At the first step, a main magnetic pole layer is formed on a foundation layer. At the second step, a main magnetic pole forming mask whose recording-medium-facing surface is of an inverted trapezoidal shape is formed on the main magnetic pole layer. At the third step, a main magnetic pole whose recording-medium-facing surface is of an inverted trapezoidal shape is formed by performing ion milling on a laminated structure including the foundation layer and the main magnetic pole layer from a direction which makes a given angle with a lamination direction according to a bevel angle of the inverted trapezoidal shape.
摘要:
An aminoalkylbenzene derivative of the formula: ##STR1## [wherein A is oxygen or sulfur;Y is oxo, thioxo, or cyanoimino;a is an integer of 1 to 3;b is an integer of 0 to 3;c is an integer of 1 to 4;R.sup.1 is alkyl;R.sup.2 is hydrogen or alkyl; orR.sup.1 and R.sup.2 taken together represent pyrrolidinyl;R is hydrogen, cycloalkyl, trihaloalkyl, alkoxy, dialkylamino, aryl, aroyl, heterocyclic group, or a group of the formula: ##STR2## (wherein R.sup.3 is hydrogen, halogen, amino, alkyl, alkylamino, dialkylamino, alkylthio, or aryloxy;R.sup.4 is hydrogen, alkyl, alkenyl, aryl, or heterocyclic group; orR.sup.3 and R.sup.4 taken together represent alkylidene or aralkylidene);with the proviso that the above aryl, aroyl, and heterocyclic group can be substituted by 1 to 3 substituents] and its pharmaceutically acceptable acid addition salts being useful as histamine H.sub.2 blockers, especially peptic ulcer remedies, are provided via several routes.
摘要:
The present invention is directed to providing a perpendicular magnetic write head which can suppress unintended erasure of information written on a write medium at a non-writing time by optimizing a magnetic domain structure of main component elements that are engaged in writing operation. In the perpendicular magnetic write head, an auxiliary magnetic pole layer is disposed on a trailing or leading side of a main magnetic pole layer, the auxiliary magnetic pole layer being recessed from the main magnetic pole layer. When the main magnetic pole layer has a tensile stress as its internal stress, a nonmagnetic layer disposed in a layer same as the auxiliary magnetic pole layer and in an area in front of the auxiliary magnetic pole layer, also has a tensile stress as its internal stress.
摘要:
A magnetic head incorporates: a medium facing surface; a coil; a pole layer; first and second shields disposed to sandwich the pole layer therebetween; a first gap layer disposed between the first shield and the pole layer; a second gap layer disposed between the second shield and the pole layer; and a substrate. The first shield is located closer to the substrate than the second shield. The magnetic head further incorporates an antireflection film disposed between the first shield and the first gap layer or between the first gap layer and the pole layer. The pole layer is formed by frame plating.
摘要:
A pressure sensor prevents the occurrence of a large deformation or breakage of the diaphragm in a strain gage-type pressure sensor utilizing a thin plate-shaped insulating body as the diaphragm. The pressure sensor comprises an insulating diaphragm having a strain gage on its surface and a substrate positioned opposing the surface of the diaphragm on which the strain gage is mounted and kept a predetermined distance away from the surface. The diaphragm can be formed of material such as ceramic of alumina, zirconia or the like, silicon or crystal. The substrate can be formed of either the same material as the diaphragm, or the surface opposing the diaphragm can be formed of an insulator disposed on metal. The diaphragm and the substrate can be affixed using a low-melting glass.