Mitsubishi Materials Corporation

Tohoku Ricoh Co., Ltd.

Tadashi Yonezawa

Katsumi Ogi

Tsutomu Atsuki

Takanori Endo

Nobuyuki Soyama

Seiro Yahata

Masami Miyake

Seirou Yahata

Go Sasaki

Hideaki Matsuda

Kensuke Kageyama

Hiroto Uchida

Takashi Tsuchida

Kouichi Ishiyama

Tomohiro Mori

Shigeyuki Osawa

Takeshi Soe

Seiji Yamanaka

Sumio Suzuki

Shigenobu Irokawa

Keiko Endo

Katumi Ogi

Shigeru Yashima

An antenna for RFID (Radio Frequency Identification) configured to be electrically connected to an IC (Integrated Circuit) chip or capacitor and configured to be affixed to an article. The antenna includes: a planar conductive member having a first side configured to be mounted on the article; and a coil body configured with coil turns and mounted on or at a second side which is opposite to the first side of the conductive member. The number of the coil turns and diameter of the coil body are adjusted such that a characteristic of said coil body has a predetermined value. The conductive member shields the coil body from the article.

Antenna for RFID

An antenna coil includes an air-core coil wound helically in a plane and a plate magnetic core member inserted in the air-core coil to be approximately parallel with a plane of the air-core coil. The magnetic core member is formed by a soft magnetic metal, an amorphous or ferrite, or a composite member of a powder, flake and plastic, or rubber. The magnetic core member is formed by performing an injection molding operation or a compressing molding operation of the composite member. Alternatively, the magnetic core member is a magnetic coating formed by applying and drying the composite member. A non-magnetic conductive plate that has a conductivity is layered on a surface of the air-core coil through which the magnetic core member is inserted. The conductive plate is made of a copper, a copper alloy, an aluminum or an aluminum alloy having 0.01 to 2 mm thickness. The antenna coil is operated by relatively high frequency while it is rigid relatively.

Antenna coil, and RFID-use tag using it, transponder-use antenna

A body detecting element is buried in the ground together with a body such as a metal body and includes a magnetic member acting as a magnetic core, an antenna coil wound around the magnetic member and a capacitor connected to both the ends of the antenna coil for forming a resonance circuit together with the antenna coil. The antenna coil is mounted on the body integrally therewith through an electromagnetic shield member with the outer peripheral surface thereof confronting the outer surface of the body. A body detecting element includes an RFID circuit connected to the antenna coil and mounted on a body integrally therewith such that the outer peripheral surface of the antenna coil confronts the outer surface of the body through an electromagnetic shield member. Even if the body detecting element is mounted on the body such as the metal pipe integrally therewith, it can accurately detect the body because a resonant frequency and the Q value of the coil are not changed. There is almost no possibility that detecting element is broken or moved even if a body other than the above body is dug.

Detection element for objects and detection device using the same

A method and a device for determining the amount of ink or similar liquid existing in a container are disclosed. A resonance circuit is arranged on the container storing the liquid. A voltage having a preselected frequency is applied to a drive coil located outside of the container to thereby induce a voltage having a preselected frequency in the resonance circuit. The voltage induced in the resonance circuit, in turn, induces a voltage having a preselected frequency in a sense coil also located outside of the container. The amount of liquid in the container is determined in terms of the voltage induced in the sense coil.

Method and device for determining the amount of a liquid existing in a container

A burglar detection apparatus has a tag,that includes a resonance circuit. The tag is preferably contained with an object,whose theft is desired to be detected. The tagged object may be placed in a drawer,which is contained in a box,. A tag detection sensor,is installed in the box and detects whether the tag,is present in the drawer,. Also, a drawer sensor,detects whether the drawer is opened. Based on respective detection outputs of the tag detection sensor,and the drawer sensor,, a control circuit,controls an alarm,. Advantageously, the apparatus can be installed in a comparatively small space, does not malfunction even if subjected to large amounts of electrical noise, and reliably detects the presence or absence of a tag even if the tag is located near a metal object.

Apparatus for detecting theft by a radio wave

A composition for forming a film, comprising a solution of metal compounds in an organic solvent, wherein a molar ratio of metals in said solution is (Sr.sub.1-n R.sub.n):Bi:(Ta.sub.Y Nb.sub.1-Y)=X:Q:2, R is at least one element selected from the group consisting of La, Ce, Pr, Nd, Eu, Sm, Tb, Gd and Er, and 0&lt;n.ltoreq.0.1, 0.4.ltoreq.X&lt;1, 0.ltoreq.Y.ltoreq.1 and 1.5.ltoreq.Q.ltoreq.3.5, can be used to form a ferroelectric film. This ferroelectric film is useful in a ferroelectric capacitor, particularly a ferroelectric capacitor for a non-volatile memory.

Bi-based ferroelectric composition and thin film, method for forming the

A composition for forming a metal oxide thin film pattern which is a solution containing one or more hydrolytic metal compounds selected from the group consisting of hydrolytic organometallic compounds (e.g., metal alkoxide) and metal halides, and a water generating agent which frees water under the effect of irradiation with active rays (e.g., o-nitrobenzyl alcohol and 2-nitroethanol) and, as required, an acid generating agent which frees acid under the effect of irradiation with active rays is disclosed. A thin film pattern is formed by coating the composition onto a substrate, irradiating active rays for forming an image on the resultant photosensitive coating film, developing the same with water or an alcoholic solvent to remove the non-exposed portion, and heat-treating the substrate to convert the remaining film into a metal oxide, thereby forming a negative-type metal oxide thin film pattern.

Composition for forming metal oxide thin film pattern and method for

Dielectrics represented by (Sr.sub.x Bi.sub.1-x)Bi.sub.2 Ta.sub.2 O.sub.y, wherein 0&lt;x&lt;1, and y represents the total number of oxygen atoms bonded to the respective metals, and thin films thereof, can be prepared by repeating the steps of applying compositions for forming the Sr--Bi--Ta--O-based dielectric thin films on substrates, drying and conducting a first-firing a plurality of times until the desired film thickness is achieved, and then conducting a second-firing for crystallization and compositions for forming Bi-based ferroelectric thin films and target materials for forming Bi-based ferroelectric thin films, both represented by the metal composition ((Sr.sub.a (Ba.sub.b, Pb.sub.c)).sub.x Bi.sub.y (Ta and/or Nb).sub.z wherein 0.4.ltoreq.X&lt;1.0, 1.5.ltoreq.Y.ltoreq.3.5, Z=2, 0.7X.ltoreq.a&lt;X, and 0&lt;b+c.ltoreq.0.3X can be formed by repeatedly applied onto substrates, dried and subjected to a first-firing a plurality of times until the desired film thickness is achieved, and then subjected to a second-firing for crystallization, while the target materials are used to form films by sputtering, and the films undergo heat treatment during and/or after their formation for crystallization.

Bi-based dielectric thin films, and compositions and method for forming

A composition comprising Ba and Sr salts of carboxylic acids represented by the formula: C.sub.n H.sub.2n+1 COOH wherein 3.ltoreq.n.ltoreq.7, and having structures represented by the following formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent a hydrogen atom, a methyl group or an ethyl group, and M represents Ba or Sr, can be used to form thin films of Ba.sub.1-x Sr.sub.x Ti.sub.y O.sub.3. A composition comprising a barium carboxylate, a strontium carboxylate and a titanium alkoxide in a mixed solvent of a carboxylic acid and an ester, can also be used to form Ba.sub.1-x Sr.sub.x Ti.sub.y O.sub.3 thin films. The proportion of the mixed solvent is 2-11 molar times as much as the Ti. A composition comprising salts of carboxylic acids represented by R.sup.a COOH wherein R.sup.a is a linear or branched alkyl group having 3-7 carbon atoms, as the Ba and Sr sources, and Ti(OR.sup.b).sub.4 wherein R.sup.b is a linear or branched alkyl group having 1-7 carbon atoms, as the Ti source, can also be used to form thin films of Ba.sub.1-x Sr.sub.x TiO.sub.3.

Composition and method for forming Ba.sub.1-X Sr.sub.x Ti.sub.y O.sub.3

A composition for formation of thin-film patterns of a metal oxide which comprises a metal alkoxide and one or more nitro compounds selected from the group consisting of nitrobenzyl alcohol derivatives, nitrobenzaldehyde derivatives, nitrostyrol derivatives, nitroacetophenone derivatives, nitroanisole derivatives and nitrofuran derivatives. This composition is applied to a substrate which is then irradiated with light to perform patterning by utilizing the difference in solubility between the light-irradiated portion and the non-light-irradiated portion, attributed to the photodecomposition reaction of the irradiated portion. A photoreactive compound is added to a starting solution which contains an organic solvent and an organic metal compound, the solution is misted, and the resulting mist is deposited on a substrate while irradiating with light.

Formation of thin-film patterns of a metal oxide

A pattern of a non-volatile high-performance ferroelectric thin film memory is formed by applying a composition containing hydrolytic metal compounds, and a photosensitizer which generates water when irradiated with active rays onto a substrate. The resultant film is exposed to active rays in compliance with a prescribed pattern to form an image and developed with a solvent to remove non-exposed portions, and then the remaining exposed portions are subjected to a heat treatment to convert the exposed portions into a dielectric substance comprising a metal oxide as expressed by the following formula (I):

Method for forming a pattern of non-volatile ferroelectric thin film

A thermistor film is prepared by first preparing an alcohol solution is prepared by dissolving a metal compound in one or more kinds of polyvalent alcohols selected from the group consisting of ethylene glycol, diethylene glycol and glycerin. A coating solution is then prepared by adding and mixing an organic acid having a carboxyl group to the alcohol solution. The coating solution is coated on the surface of a heat-resistant substrate to form a coating film, the substrate on which the coating film is formed is dried and subjected to heat treatment to form a composite oxide precursor containing a metal of the above metal compound, and the precursor is calcined at a temperature of 600.degree. to 1000.degree. C. The method of the present invention can form a thermistor thin film which is dense and uniform over a wide range by simple and easy operations at a low cost.

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Omiya, Japan

Tadashi Yonezawa