Alps Electric Co., Ltd.

Umk Technologies Co., Ltd.

Takehiro Takoshima

Takehiko Sone

Yoshimi Kamijo

Masakazu Kato

Yoshimi Kamijyo

Takatoshi Ishikawa

Rikizou Hatakeyama

Nobuyuki Mori

Hideaki Ido

Ko Nakajima

Akihiro Okazaki

Takashi Ushida

Akira Mitsuzuka

A high-capacity magnetic memory capable of writing and reading a magnetic record in/from a magnetic recording film according to a perpendicular magnetic recording system at a high speed in a purely-electrically random access manner. In the magnetic memory, a writing-magnetic-field generating meansand a writing word lineare disposed relative to a perpendicular magnetic recording film, and a reading/writing bit-line conductor, a magnetoresistive-effect elementand a reading word lead conductorare laminated in order on a probe substrate opposed to the perpendicular magnetic recording film. A magnetic probecomposed of a carbon nanotube containing a soft magnetic material is disposed relative to the magnetoresistive-effect elementin a standing manner, and electrically connected to the reading/writing bit-line conductor. During a writing operation, a micro-discharge is generated in a micro-gap G between the edge of the magnetic probe and the magnetic recording film under a writing magnetic field to allow a writing current to flow through the micro-gap G so as to heat a micro-region of the magnetic recording film in such a manner that it goes through its Curie point to thereby become magnetized in the direction of the recording magnetic field to form a magnetic record therein. During a reading operation, the magnetic record is read out through the magnetic probe in accordance with a current variation in the magnetoresistive-effect element.

Large-capacity magnetic memory using carbon nano-tube

In a thermal head in which a heat generating portion is protruded by partially forming a glass glaze layer on an insulating substrate, a protruding portion is formed on the insulating substrate and the glass glaze layer is formed on the protruding portion. The heat generating portion can sufficiently be protruded to render the contact with the recording paper or ink ribbon favorable, thereby improving the heat efficiency.

Thermal head

Disclosed is a thermal head in which a heat-generating resistor layer, a power feeding conductor layer, and a protecting film are formed on an electrically insulating substrate, the heat generating resistor layer being constituted by an alloy of tantalum, rare earth metals, and nitrogen. Further disclosed is a method of producing a thermal head comprising the steps of forming a heat-generating resistor layer, a power feeding conductor layer, and a protecting film, on an electrically insulating substrate, the step of forming the heat-generating resistor layer including the step of performing spattering in mixed gases of argon and nitride to form the heat-generating resistor layer made of an alloy of tantalum, a rare earth metal material, and nitrogen, by using a composite target in which small pieces of the rare earth metal materials are disposed on a tantalum target.

Thermal print head

A unit comprising a printed board on which a plurality of surface acoustic wave (SAW) devices are installed. Each SAW device comprises a piezoelectric substate on which arrays of strip electrodes are formed. A cover is mounted over the SAW devices to hermetically seal the surfaces of the SAW devices on which the electrodes are formed. The terminals of the board are directly coupled to the terminals of the SAW devices.

Unit carrying surface acoustic wave devices

A surface acoustic wave device comprising a device body and a multilayer printed board. The body has a piezoelectric substrate on which arrays of strip electrodes are formed. The body is covered with an insulating film except for locations where terminals are formed. The printed board is spaced a given distance from the body. The terminals of the printed board are connected via a solder layer with the terminals of the device body.

Surface acoustic wave device

An elastic surface wave element which prevents mixture of foreign substances to improve the reliability thereof and allows a peripheral circuit for driving the element to be integrated with the element to facilitate designing and assembly of the element. The elastic surface wave element comprises an element body and a multi-layered printed circuit board disposed one on the other with a predetermined gap left therebetween and having terminal sections connected to each other. The element further comprises a sound wave absorbing member which seals outer peripheries along which the element body and the multi-layered printed circuit board are joined together and thus seals airtight a face of the element on which electrodes are formed.

Elastic surface wave element

A thermal head having a glass glaze layer, a heat generating resistance layer, an electric power supplying conductor layer and a protecting layer formed on an insulating substrate, wherein the glass glaze layer is so formed that the lower portion thereof is embedded in the insulating substrate and the upper portion thereof is protruded from the surface of the insulating substrate, and a metal layer is disposed in contact with the lower surface of the glass glaze layer. The heat generating portion can effectively be protruded to render the contact with the recording paper or ink ribbon favorable, thereby improving the heat efficiency. Further, temperature falling rate once after the temperature of the heat generating portion has been raised can be increased.

A thermal head having a heat-generating resistor layer, a power feeding conductor layer, and a protective layer superposed on an electrically insulating layer, acquires improved quality by forming the heat-generating resistor layer with an alloy consisting of tantalum, a high-melting metal, and nitrogen. The thermal head of improved quality is produced by spattering a composite target consisting of tantalum and the high-melting metal in a mixed gas consisting of nitrogen and argon. The high-melting metal is at least one member selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, chromium, molybdenum, and tungsten.

Thermal head and method for manufacture thereof

An elastic surface wave element which has a grille-shaped electrode formed on a piezoelectric substrate is improved by having the grille-shaped electrode portion thereof covered with an insulating film made of tantalum pentoxide or silicon nitride. The insulating film functions to minimize the degradation of properties suffered by the conventional elastic surface wave element and preclude substantially completely the phenomenon of short-circuit between the electrode bars of the grille-shaped electrode.

Growing community of inventors

Furukawa, Japan

Takehiro Takoshima