Abstract: A thin film magnetic head having two conductor layers provided within a magnetic circuit constituted by a first and a second magnetic member. The magnetic circuit has, at the side to which a recording medium is opposed, a portion where the first and second magnetic members are opposed to each other over a length substantially equal to a gap depth, intervening a non-magnetic gap member therebetween, and a portion ahead thereof where they are connected with each other. The edge of the gap member constitutes an aperture of the magnetic circuit. The thin film magnetic head arranged as above permits a high density recording without reducing its production yield.

Abstract: A first magnetic layer is formed upon a non-magnetic substrate, a gap layer is formed upon the first magnetic layer, a conductor coil covered with an insulation layer is formed upon the gap layer, a second magnetic layer is formed upon the gap layer and the insulation layer, a magnetic gap being formed between the first and second magnetic layers at a front portion facing a recording medium, and the second magnetic layer being connected to the first magnetic layer at a back portion. After forming a mask made of metal oxide upon the second magnetic layer, the second magnetic layer, the gap layer, and the first magnetic layer are formed into a predetermined shape respectively at the tip portion by dry etching. Thus, a high performance thin-film magnetic head having the same widths for the first and second magnetic layers is obtained.

Abstract: In a magnetoresistive sensor having a magnetoresistive effect element which is held between two sheets of high permeability magnetic ferrite with insulating layers interposed between them, a ferromagnetic metal film is provided adherently to the high permeability magnetic ferrite between the ferrite and the insulating layer, a rise in temperature of the magnetoresistive effect element thereby being held down and a reproduced waveform being made sharp, and thus the characteristics of the element being improved with the life thereof prolonged.

Abstract: A thin film magnetic head including a first magnetic material layer, a gap material layer formed on the first magnetic material layer, an inorganic insulating layer having a generally trapezoidal shape in cross section and formed on the gap material layer, a second magnetic material layer formed on the organic insulating layer and conductor coils formed on the gap material layer within the organic insulating layer, in which the gap material layer is tapered by an etching process with the organic insulating layer of the generally trapezoidal shape in cross section used as a mask, and thereafter the organic insulating layer is etched so that the organic insulating layer is caused to stand back from the gap material layer a predetermined distance in the direction away from the air bearing surface of the head which is opposed to a recording medium.

Abstract: A method of patterning a thin film by dry etching is disclosed in which, in order for a thin alumina film to have a predetermined pattern, the thin alumina film is selectively removed by carrying out the ion beam etching which uses a carbon fluoride gas, while using a photoresist film as a mask.

Abstract: A thin-film magnetic head having a magnetic core of double step structure and a method of fabricating it. A first magnetic core is formed on a substrate, which has a predetermined thickness at a pole chip region thereof and a thickness larger than the predetermined thickness at a back region thereof; a magnetic gap is formed thereon, a conductor coil is formed on the magnetic gap, which is encircled by an inter-layer, insulating film; a first magnetic film is formed thereon, which constitutes one layer of a second magnetic core and is connected with the first magnetic core at the back region; and a second magnetic film is formed thereon through an inorganic insulating film, which constitutes another layer of the second magnetic core and is removed at the pole chip region. When the second magnetic film is removed, the inorganic insulating film serves to protect the first magnetic film, and hence the thickness of the first magnetic film is maintained unvaried.

Abstract: A control device for preventing a nut from loosening, comprises a first member having an external thread portion, a second member having an internal thread portion screwed with the external thread portion and an opening, a locking coil which is wound around the external thread portion of the first member and has at its both ends bent portions to be selectively engaged with the opposite sides of the opening of the second member, and a third member which is rotatably fitted in the second member and engaged or disengaged with the bent portions of the locking coil.

Abstract: A device for adjusting a clearance between a certain member and another member, includes a first elongate member such as an outer cable of a clutch system, a locking coil member having a pair of bent portions at its ends which is wound around a male screw portion of the first member, a second member such as a nut provided with a female screw portion screwed with the male screw portion of the first member and a notched portion formed in the second member, and control means such as a ring which is movable in its rotational and axial directions in relation to the second member within a limited range. The control means is operated to control the rotation of the second member so that the locking coil member is loosened from or tightly locked on the male screw portion of the first member depending on a position of the control means in relation to the second member.

Abstract: An airconditioner consists of heat pump type freezing cycle equipment comprising a rotary compressor having a guide port open to the interior of its cylinder; a refrigerant flow-changing valve; an indoor heat exchanger; a first decompressing device; a gas-liquid separator; a second decompressing device; an outdoor heat exchanger, all communicating with each other in the order mentioned. And an injection passage in the guide port communicates with the gas-liquid separator so that a gas refrigerant is injected from the gas-liquid separator into the cylinder through the guide port.