摘要:
An object of the present invention is to provide an efficient method of manufacturing 3,3′,4,4′-tetraaminobiphenyl with a smaller number of steps. The manufacturing method of 3,3′,4,4′-tetraaminobiphenyl includes reacting the amino groups of a 4-halo-o-phenylenediamine with an inorganic sulfur compound to lead to a 5-halo-2,1,3-benzothiadiazole, subsequently coupling two molecules of the benzothiadiazole together to form a 5,5′-bis(2,1,3-benzothiadiazole) and then deprotecting the amino groups to yield 3,3′,4,4′-tetraaminobiphenyl.
摘要:
An electron gun includes an electron source configured to emit electrons. The electron source includes an electron emission region configured to emit the electrons and an electron emission restrictive region configured to restrict emission of the electrons. The electron emission restrictive region is located on a side surface of the electron source except an electron emission surface on a tip of the electron source and is covered with a different material from the electron source. The electron gun emits thermal field-emitted electrons by applying an electric field to the tip while maintaining a sufficiently low temperature to avoid sublimation of a material of the electron source. The material of the electron source may be lanthanum hexaboride (LaB6) or cerium hexaboride (CeB6). The electron emission restrictive region may be covered with carbon.
摘要:
An inkjet recording device is disclosed that is capable of precisely defining the gap between a conveyance belt and a recording head and maintaining good flatness of the conveyance belt and a recording medium being conveyed. A guide unit is arranged to push a portion of the conveyance belt from the inner side to approach the recording unit. The guide unit has a number of projecting ribs formed on the surface of the guide unit in contact with the conveyance belt and arranged to be perpendicular to the rolling direction of the conveyance belt.
摘要:
An electron gun having an electron source emitting electrons includes: an acceleration electrode which accelerates the electrons; an extraction electrode which has a spherical concave surface having the center on an optical axis and facing the electron emission surface, and which extracts an electron from the electron emission surface; and a suppressor electrode which suppresses electron emission from a side surface of the electron source. In the electron gun, an electric field is applied to the electron emission surface while the electron source is kept at a low temperature in such an extent that sublimation of a material of the electron source would not be caused, to cause the electron source to emit a thermal field emission electron.
摘要:
The invention provides a production, process of a tetrahydropyran compound, characterized by allowing 3,4-dihydro-2-alkoxy-2H-pyran compound or tetrahydro-2-alkoxy-2H-pyran compound which can be easily prepared through reaction between acrolein and alkylvinylether, with hydrogen in the presence of a catalyst containing an element of Groups VIII to X under acidic condition. The production process of the invention is useful for production of Grignard reaction solvent or polymer solvent and intermediate of organic compound.
摘要:
The disclosure herein pertains to fashioning an n channel junction field effect transistor (NJFET) and/or a p channel junction field effect transistor (PJFET) with an open drain, where the open drain allows the transistors to operate at higher voltages before experiencing gate leakage current. The open drain allows the voltage to be increased several fold without increasing the size of the transistors. Opening the drain essentially spreads equipotential lines of respective electric fields developed at the drains of the devices so that the local electric fields, and hence the impact ionization rates are reduced to redirect current below the surface of the transistors.
摘要:
The present invention extracts information related to rendering from structured scenario description 101 that describes information related to objects and the rendering, extracts a rendering setup corresponding to information related to the extracted rendering from rendering knowledge base 109, extracts a moving picture corresponding to the objects described in structured scenario description 101 from moving picture component database 106 and produces rendering on the extracted moving picture using the extracted rendering setup, and can thereby create a moving picture subjected to effective rendering.
摘要:
An electron beam exposure apparatus for exposing a pattern accurately even if the current of the electron beam is high. The electron beam exposure apparatus 100 includes a mask 30 with a first and second block patterns for shaping the electron beam. Magnification of the first block pattern to a first exposure pattern which is to be exposed by the electron beam having a first current shaped by the first block pattern is different with magnification of the second block pattern to a second exposure pattern which is to be exposed by the electron beam having a second current shaped by the second block pattern.
摘要:
A method of producing a vertical bipolar PNP transistor is disclosed. The phosphorous profile in the base layer is controlled. Carbon that is incorporated in the base layer in the vicinity of the base-collector junction suppresses the diffusion of phosphorous deeper than implanted in a subsequent thermal step. PNP transistors with a narrow phosphorous-doped base can thus be manufactured with a cut-off frequency increased from 23 GHz to 30 GHz.
摘要:
A set of keyword candidates having orientation, with keywords input by a user as an origin, is appropriately presented. An information retrieval support system 10, for presenting candidate words to be subsequently input to input words, comprises a search sequence creation section 34 for creating a search sequence of a set of input words input by a user arranged in chronological order, a search sequence DB 36 for storing storage sequences, a hash creation section 38 for creating a hash that has keyed particular input words based on stored sequences, a hash DB 40 for storing created hashes, a hash acquisition section 44 for acquiring a hash for keying the input words from the hash database in response to input words supplied via a search engine 31, an index calculating section 46 for calculating an index relating to words contained in a hash, and a directory creation section 48 for creating a word directory by arranging the input words in a word directory for the keys roots when the words satisfy a specified condition, wherein the created word directory is output.