Mitsubishi Materials Corporation

Diamet Corporation

Jemco Inc.

Gakuji Uozumi

Ryoji Nakayama

Muneaki Watanabe

Kenzo Nakamura

Mototaka Ishikawa

Yasushi Nayuki

Osamu Ishihara

Noriaki Nagatomo

Kazunori Igarashi

Tomohiro Mori

A temperature sensor having excellent humidity resistance and responsivity is provided. The temperature sensor according to the present invention includes an insulating substrate; a thin film thermistor portionmade of a thermistor material formed on either surface of the insulating substrate; and an opposed electrode pairconsisting of a pair of opposed electrodesformed so as to be opposed to each other on at least either one of the top and bottom surfaces of the thin film thermistor portion, wherein a plurality of the opposed electrode pairs are provided and connected to one another in series. As a result, a voltage applied to a unit thermistor composed of one opposed electrode pair becomes 1/n fold, which can suppress the electrode corrosion due to humidity load.

Temperature sensor

A lightweight infrared sensor that detects a temperature at a portion spaced apart from a circuit substrate with high accuracy, is installed on the circuit substrate easily and stably, and includes an insulating film; a first and a second heat sensitive elements are disposed on one surface of the insulating film separately; a first conductive film on the insulating film that is connected to the first heat sensitive element; a second conductive film connected to the second heat sensitive element; an infrared reflection film on the other surface of the insulating film so as to face the second heat sensitive element; a plurality of terminal electrodes formed on one end of the insulating film and fitted into an external connector; an edge reinforcing plate adhered to one end of one surface of the insulating film; and a mounting hole that is formed on the other end.

Infrared sensor

A lightweight infrared sensor which is readily and stably erected to a substrate, the infrared sensor includes an insulating film; a first and second heat sensitive element are disposed on one surface of the insulating film separately; a first and second conductive film on one surface of the insulating film and are respectively connected to the first and the second heat sensitive element; an infrared reflection film on the other surface of the insulating film so as to face the second heat sensitive element; a reinforcing plate on which a sensor part window corresponding to a sensor part is formed and which is adhered to the insulating film; and a first and a second terminal electrode are respectively connected to the first and the second wiring film and formed on the edge of the insulating film.

Oxide-coated Fe powder for producing various electromagnetic circuit components requiring high resistivity is provided. The oxide-coated Fe powder is a Mg-containing oxide film-coated iron powder coated with an Mg&#x2014;Fe&#x2014;O ternary-based deposition film at least containing (Mg, Fe)O. The (Mg,Fe)O is a crystalline MgO-dissolving wustite. The Mg&#x2014;Fe&#x2014;O ternary-based oxide deposition film has a sulfur-enriched layer containing a higher concentration of sulfur than that of central portion of the iron powder, fine crystalline texture having a grain size of 200 nm or less, and the outermost surface is substantially composed of MgO. A composite soft magnetic material using the Mg-containing oxide film-coated iron powder is also provided.

Iron powder coated with Mg-containing oxide film

A method for producing a soft magnetic metal powder coated with a Mg-containing oxide film, comprising the steps of adding and mixing a Mg powder with a soft magnetic metal powder which has been subjected to heating treatment in an oxidizing atmosphere at a temperature of 40 to 500&#xb0; C. to obtain a mixed powder, and heating the mixed powder at a temperature of 150 to 1,100&#xb0; C. in an inert gas or vacuum atmosphere under a pressure of 1&#xd7;10to 1&#xd7;10MPa, while optionally tumbling; and a method for producing a composite soft magnetic material from the soft magnetic metal powder coated with a Mg-containing oxide film.

Method for producing soft magnetic metal powder coated with Mg-containing oxide film

A flat soft magnetic metal powder is provided that includes: Ni in the range of 60 to 90 mass %, one or more kinds of Nb, V, and Ta in the range of 0.05 to 20 mass % in total (0.05 to 19.95 mass % when Mo is added thereto), Mo in the range of 0.05 to 10 mass % if necessary, one or two kinds of Al and Mn in the range of 0.01 to 1 mass % in total if necessary, and the balance including Fe; an average grain size of 30 to 150 &#x3bc;m and an aspect ratio (average grain size/average thickness) of 5 to 500; and a flat face. Here, with a peak intensity of a face index () in an X-ray diffraction pattern Iand a peak intensity of a face index () I, a peak intensity ratio I/Iis in the range of 0.1 to 10.

Flat soft magnetic metal powder and composite magnetic material including the soft magnetic metal powder

The invention provides an Fe&#x2014;Ni&#x2014;Mo soft magnetic flaky powder having a component composition of, in percent by mass, Ni: 60 to 90%, Mo: 0.05 to 1.95%, and the balance of Fe and unavoidable impurities, and a flat surface of an average particle size of 30 to 150 &#x3bc;m, and an aspect ratio (average particle size /average thickness) of 5 to 500; and having a peak intensity ratio I/Iwithin a range between 0.43 and 10, where Iis the peak height of the face index (200) and Iis the peak height of the face index (111), in an X-ray diffraction pattern measured in such a manner that the plane including the X-ray incident direction and the diffraction direction is perpendicular to the flat surface of the soft magnetic flaky powder, and the angle between the incident direction and the flat surface is equal to the angle between the diffraction direction and the flat surface. Furthermore, the invention provides a soft magnetic flaky powder with oxide layer wherein an oxide layer of a thickness of 50 to 1000 &#x212b; is formed on the surface of this soft magnetic flaky powder.

Fe-Ni-Mo soft magnetic flaky powder and magnetic composite material containing soft magnetic powder

An antenna device of an interrogator which constitutes an automatic identification system by exchanging information with an IC tag attached to an object to be identified by electromagnetic coupling is disclosed. The antenna device comprises an antenna element, and a capacitor connected in series to the antenna element and having a variable capacitance to maintain a predetermined resonance frequency. The predetermined resonance frequency is maintained by switching taps on an antenna coil. Alternatively, the predetermined resonance frequency is maintained by switching taps on a tapped inductor or by a variable inductor.

Antenna device of interrogator

An identifying system for overlapped tags, wherein one of the tags, e.g., a tag to be appended to an article, has an antenna coil and a radio frequency identification device (RFID) connected to the antenna coil. Two or more resonance capacitors are connected in parallel to each other and in parallel to the antenna coil and two or more switches electrically connect the two or more resonance capacitors to the antenna coil and to the RFID. A control circuit is configured to operate on-off controls of the two or more switches to change a resonance frequency of the identifying system.

Identifying system of overlapped tag

An apparatus for identifying an article including an interrogator to enable a tag to be identified, even if the tag is overlapped with another tag or a metal plate. The tag is attached to the article, and a memory for storing data about the article is provided in an RFID element connected to an antenna coil of the tag. The tag is activated by transmitting a radio wave of a frequency with which the tag resonates from a transmitting/receiving antenna of the interrogator. Data is read from the memory in response to a reading command, and data is writing into the memory in response to a writing command from the interrogator. The interrogator also includes an oscillation circuit for sweeping a radio wave transmitted from the transmitting/receiving antenna over a predetermined frequency range. The predetermined frequency range is a frequency range which includes all resonance frequencies of a plurality of the tags that vary based on plurality of overlapped articles to which the tags are attached.

Growing community of inventors

Naka, Japan

Gakuji Uozumi