Tohoku University

Ideal Star Inc.

Other

Kabushiki Kaisha Toshiba

Kuniyoshi Yokoo

Yasuhiko Kasama

Kenji Omote

Morihiko Saida

Yuzo Mizobuchi

Shoichi Ono

Haruna Oizumi

Hiroyuki Sagami

Hiroshi Okada

Tadashi Okamoto

Takayuki Kuwabara

Kohshin Takahashi

Takashi Saita

Kazuaki Mizokami

Takeo Furukawa

Yoshinori Sibata

Hidenori Mimura

Provided is a hole-blocking layer which has excellent basic characteristics such as high photoelectric conversion efficiency, while exhibiting excellent productivity. The hole-blocking layer is produced by a process that has a step of bringing an aqueous solution containing hydrogen peroxide and titanium (IV) oxysulfate into contact with the surface of a member on which the hole-blocking layer is to be formed, and holding the contact between the aqueous solution and the member at 50 to 120&#xb0; C., so that an amorphous titanium oxide precursor precipitates on the surface of the member; and a step of drying the amorphous titanium oxide precursor that has precipitated on the member.

Hole blocking layer and method for producing same, and photoelectric conversion element comprising the hole blocking layer and method for manufacturing same

A gas sensor, which is extremely compact to be arranged for separated gas piping in semiconductor device manufacturing equipment, a gas measuring system using such gas sensor, and a gas detection module for the gas measuring system. The gas sensor has a gas detection device containing a dielectric semiconductor, the electric conductivity of the gas detection device varying in response to the degree of adsorption of gases to the gas detection device, a capacitive element connected in series to the gas detection device, and a pair of electrodes which are connected to electric terminals of an electric element comprising the gas detection device and the capacitive element, wherein the gas sensor is capable of detecting the degree of adsorption of gases to the gas detection device from an electrical response to a voltage which is applied to the electrodes and which periodically varies and reverses in polarity.

Gas sensor, gas measuring system using the gas sensor, and gas detection module for the gas sensor

In order to isolate and purify an endohedral fullerene, a solvent washing was performed using toluene to concentrate the endohedral fullerene in a residual, but endohedral fullerene could not be efficiently purified because impurities other than the endohedral fullerene could not be sufficiently removed. Thus, the endohedral fullerene is isolated and purified by using a solvent such as chloronaphthalene or tetralin having a high solubility for the endohedral fullerene and concentrating the endohedral fullerene in the solvent. The endohedral fullerene isolated and purified by solvent extraction has a cluster structure where the endohedral fullerene is surrounded with empty fullerenes. Thus, this endohedral fullerene is highly stable and is a useful material applicable to various fields such as medical care and electronics.

Fullerene-based material and process for producing fullerene-based material

In a field emission cathode emitting an electron beam modulated by any desired high frequency, a cathode tip is formed in one surface of an N type semiconductor substrate constituting a collector region, an insulating layer formed on the one surface of the semiconductor substrate to have an opening which surrounds said cathode tip, a gate electrode is formed on the insulating layer to have an opening which surrounds the cathode tip, a P type base region is formed in the other surface of the semiconductor substrate, a base electrode is formed on the base region, an N type emitter region is formed in the base region, and an emitter electrode is formed on the emitter region. A DC supply source is connected across the gate electrode and the emitter electrode and a high frequency supply source is connected across the base electrode and the emitter electrode. Then, an electron beam modulated by a high frequency within the millimeter wave or microwave region of the high frequency supply source can be emitted efficiently from said cathode tip. Additionally, an electron beam modulated at a high frequency is generated by applying the Gunn effect in a compound semiconductor to a field emission cathode. The thus generated electron beam is cooperated with a cavity resonator or Fabry-P&eacute;rot resonator, and an electromagnetic wave within the millimeter wave or microwave region can be efficiently generated.

Field emission cathode and electromagnetic wave generating apparatus comprising the same

In a peniotron, a hollow electron beam is generated from a cathode gun assembly and a DC magnetic field is applied to the electron beam from solenoid coils. Thus, each electron of the electron beam is gyrated into a resonant cavity and into propagating waveguide sections which are maintained in auto-resonant conditions so that the electrons interact with an electromagnetic waves of TE mode not only in the resonant cavity section but also in a waveguide section. Accordingly, the electromagnetic wave is oscillated in the resonant waveguide section and amplified in the propagating waveguide section in such a manner that the level of the electromagnetic wave in the resonant cavity section is far less than the output power from said propagating waveguide.

Auto-resonant peniotron having amplifying waveguide section

An ion pump for producing an ultrahigh degree of vacuum comprising a space formed between a first perforated flat plate-shaped electrode and a second flat plate-shaped electrode and having a high frequency electric source connected between the first and second electrodes, said space being operative to induce multipactor effect between said first and second electrodes, and an ionization space adjacent to one of said first and second electrodes and formed between a first perforated getter electrode and a second getter electrode applied with a negative potential, said ionization space being operative to cause the moving electrons produced by the multipactor effect to collide with gas molecules and ionize the latter.

Ion pump for producing an ultrahigh degree of vacuum

Growing community of inventors

Sendai, Japan

Kuniyoshi Yokoo