Abstract: Disclosed herein is a method for manufacturing a microlens substrate which is excellent in chemical resistance and light fastness to intense light irradiation, and is capable of forming a microlens substrate of a high accuracy of form. The method includes the steps of: forming a lens-shaped curve at a surface side of a transparent substrate; forming an inorganic material film on the transparent substrate so as to bury the curve therewith; and planarizing the surface of the inorganic material film to provide a microlens where the curve is buried with the inorganic material film.

Abstract: A master base for fabrication includes a substrate, a first photoresist layer disposed on the substrate, and a second photoresist layer disposed on the first photoresist layer, wherein the first photoresist layer attenuates or absorbs rays reflected at the interface between the first photoresist layer and the substrate to prevent the reflected rays from interfering with applied rays in a exposing step. A method for manufacturing a master base for fabrication includes the steps of forming a first photoresist layer on a substrate, baking the first photoresist layer at the setting temperature of the first photoresist layer, and forming a second photoresist layer on the first photoresist layer.

Abstract: A magneto-resistive effect type magnetic head employing a spin valve film in which the direction of magnetization of a free layer is constant even in the absence of an external magnetic field to assure magnetic stability. The magneto-resistive effect type magnetic head includes a magneto-resistive effect film of a planar substantially rectangular configuration, having its longitudinal direction substantially perpendicular to a magnetic recording medium sliding surface, a first electrode connected to a longitudinal end of the magneto-resistive effect film, a second electrode connected to the other longitudinal end of the magneto-resistive effect film and hard magnetic films arranged on both ends along the width of the magneto-resistive effect film. The magneto-resistive effect film is made up of at least a first ferromagnetic layer, a non-magnetic layer, a second ferromagnetic layer and an anti-ferromagnetic layer, layered together.

Abstract: The present invention provides a high quality magnetoresistance effect type magnetic head having an increased reproduction output and capable of applying a uniform bias magnetic field to a magnetoresistance effect layer without increasing an impedance. The magnetoresistance effect type magnetic head according to the present invention includes: a magnetic layer 11 magnetized approximately in a vertical direction to a plane 14 opposing to a magnetic recording medium; a non-magnetic insulation layer 12 formed on the magnetic layer 11; and a magnetoresistance effect layer 13 formed on the non-magnetic insulation layer 12 and exhibiting the magnetoresistance effect. In the longitudinal type magnetoresistance effect type magnetic head according to the present, the detection current supplied to a magnetoresistance element is prevented from flowing into a hard magnetic film to lower the head reproduction output.

Abstract: A thin-film magnetic head improves magnetic stability of a magnetoresistance effect film 13 for further stabilizing the playback output. The thin-film magnetic head has a magnetoresistance effect stabilizing layer 11, a non-magnetic layer 12 and a magnetoresistance effect layer 13 exhibiting the magnetoresistance effect. The magnetoresistance effect stabilizing layer 11 has a hard magnetic film and a soft magnetic film. The magnetoresistance effect stabilizing layer 11 has a non-magnetic film 11c of a non-magnetic material in at least a partial area between a hard magnetic film 11b and a soft magnetic film 11d. In the thin-film magnetic head, there is produced a stable magnetostatic coupling action between the magnetoresistance effect stabilizing layer 11 and the magnetoresistance effect layer 13 for increasing the magnetic stability of the magnetoresistance effect layer 13 operating as a magnetically sensitive portion.

Abstract: A special-purpose clutch incorporated in a drive mechanism of hot stamping apparatus wherein heated type on a rotary type carrier is periodically pressed against a printing ribbon in superposition on a continuous strip of plastics or other material being fed at constant speed over a platen, thereby imprinting characters on the strip at constant spacings. The clutch comprises a drive disk mounted on a motor output shaft, a driven disk mounted on a type carrier shaft, and a spring through which rotation is normally imparted from the drive to driven disk. The spring is yieldable to permit the driven disk to be rotated, while the heated type is being pressed each time against the printing ribbon, by the strip of material at lower speed than the drive disk. The angular speed of the type being pressed against the ribbon can thus be precisely synchronized with the linear speed of the strip traveling over the platen.

Abstract: For imprinting characters on a continuous strip of plastics or other material by pressing heated type against a printing ribbon thereon, the strip is fed at constant speed over a platen in a direction opposite to the direction of travel of the printing ribbon from payoff reel to takeup reel. The type is mounted on a rotary type carrier over the platen, for revolution in a direction in conformity with the traveling direction of the strip. While the heated type is being pressed against the superposed ribbon and strip over the platen, the ribbon is thereby transported a predetermined distance toward the payoff reel with the strip relative to the platen and, when subsequently released by the type, is pulled back the same distance toward the takeup reel by a spring-energized pullback lever. The ribbon is then wound up onto the takeup reel via a pair of drawoff rollers just by a length corresponding to the width of the character or characters on the typeface.