摘要:
A method for easily producing high-purity polydimethylsilane or polydiphenylsilane, where by-products such as alkali metal salt and alkaline earth metal salt can be efficiently removed, is provided. Dimethyldichlorosilane or diphenyldichlorosilane is reacted with an alkali metal such as metal sodium and metal magnesium and/or an alkaline earth metal in an organic solvent such as toluene to obtain crude polydimethylsilane or crude polydiphenylsilane, methanol having dissolved therein an ether ester-type nonionic surfactant or a surfactant such as alkylbenzenesulfonate is added to the crude polydimethylsilane or the crude polydiphenylsilane to deactivate the remaining alkali metal and alkaline earth metal, and the crude polydimethylsilane or the crude polydiphenylsilane is washed with water in the presence of a surfactant to efficiently remove an alkali metal salt, an alkaline earth metal salt and the like, whereby high-purity polydimethylsilane or polydiphenylsilane is obtained.
摘要:
A method of detecting deficiency of an aperture used in a charged-particle-beam exposure process employing at least two exposure columns is disclosed, where each of the two exposure columns passes a charged-particle beam through the aperture formed through a mask to shape a cross section of the charged-particle beam before exposing the charged-particle beam onto an object. The method includes the steps of mounting masks having the same aperture to the at least two exposure columns; scanning, in each of the at least two exposure columns, the charged-particle beam over an area containing a mark on a surface substantially at the same height as the object after passing the charged-particle beam through the same aperture; obtaining, in each of the at least two exposure columns, a signal waveform corresponding to the scan by detecting charged particles scattered by the mark; and comparing the signal waveform between the at least two exposure columns.
摘要:
Disclosed is a diacetylene compound comprising, as structural units, (a) at least one member selected from diacetylene group-containing organic groups of the formulae (I) and (II):R.sup.I --C.tbd.C--C.tbd.C--R.sup.II -- (I)and--R.sup.III --C.tbd.C--C.tbd.C--R.sup.IV -- (II)wherein R.sup.I is hydrogen or a (C1-16) monovalent organic group, and R.sup.II, R.sup.III and R.sup.IV are a (C1-13) divalent organic group,(b) at least one organic group having at least one carbon-to-carbon double bond, and (c) at least one connecting group connecting the units (a) and (b) , which connecting group is selected from amide, imide, ester, ether, amino, imino, urethane, sulfonyl and carbonyl bonds. A cured shaped article made of this compound exhibits isotropically a high elastic modulus and has excellent mechanical properties.
摘要翻译:公开了包含作为结构单元的(a)至少一种选自式(I)和(II)的含二炔基的有机基团的组分的联乙炔化合物:RI-C 3BOND CC 3BOND C-RII-(I) 和RIII-C 3BOND CC 3BOND C-RIV-(II)其中RI是氢或(C1-16)一价有机基团,RII,RIII和RIV是(C1-13)二价有机基团,(b) 至少一个具有至少一个碳 - 碳双键的有机基团,和(c)连接单元(a)和(b)的至少一个连接基团,该连接基团选自酰胺,酰亚胺,酯,醚 ,氨基,亚氨基,氨基甲酸酯,磺酰基和羰基键。 由该化合物制成的固化成型制品各向同性地表现出高的弹性模量并且具有优异的机械性能。
摘要:
Disclosed is a diacetylene compound comprising, as structural units,(a) at least one member selected from diacetylene group-containing organic groups of the formulae (I) and (II):R.sup.I --C.tbd.C--C.tbd.C--R.sup.II -- (I)and--R.sup.III --C.tbd.C--C.tbd.C--R.sup.IV -- (II) wherein R.sup.I is hydrogen or a (Cl-16) monovalent organic group, and R.sup.II, R.sup.III and R.sup.IV are a (C1-13) divalent organic group,(b) at least one organic group having at least one carbon-to-carbon double bond, and (c) at least one connecting group connecting the units (a) and (b), which connecting group is selected from amide, imide, ester, ether, amino, imino, urethane, sulfonyl and carbonyl bonds. A cured shaped article made of this compound exhibits isotropically a high elastic modulus and has excellent mechanical properties.
摘要:
The present invention relates to: a process for producing a cyclic silane compound, which comprises subjecting a chained polysilane to pyrolysis in the presence of an oxide of a transition metal belonging to Group 8 or Group 11 of the periodic table; and a process for producing a cyclic carbosilane compound, which comprises subjecting a chained polysilane to pyrolysis in the presence of a simple substance of a metal selected from the group consisting of transition metal elements and elements belonging to Groups 12 to 15 of the periodic table or a compound thereof.
摘要:
The invention provides novel processes for preparing efficiently compounds of general formula (1) (wherein R1 and R2 are each independently hydrogen, optionally substituted C1-C10 alkyl, C3-C14 hydrocarbyl bearing alicyclic skeleton, or the like) and initermediates thereof. Compounds of general formula (I) can be prepared by subjecting compounds of general formula (II) and/or salts thereof to cyclization hydrolysis in an aqueous basic solution. Further, compounds of general formula (II) can be prepared from industrially easily available diaminomaleonitrile in a high yield.
摘要:
A method of detecting deficiency of an aperture used in a charged-particle-beam exposure process employing at least two exposure columns is disclosed, where each of the two exposure columns passes a charged-particle beam through the aperture formed through a mask to shape a cross section of the charged-particle beam before exposing the charged-particle beam onto an object. The method includes the steps of mounting masks having the same aperture to the at least two exposure columns; scanning, in each of the at least two exposure columns, the charged-particle beam over an area containing a mark on a surface substantially at the same height as the object after passing the charged-particle beam through the same aperture; obtaining, in each of the at least two exposure columns, a signal waveform corresponding to the scan by detecting charged particles scattered by the mark; and comparing the signal waveform between the at least two exposure columns.
摘要:
A mask for exposure of an object by an electron beam is formed of a plate of material which blocks the electron beam and which has plural pattern exposure blocks defined therein, each having one or more aperture defining regions therein and, when selected, determining the shaping of the electron beam passing therethrough so as to expose a respective pattern on an object. Each aperture-defining region has one aperture or plural, spaced apertures formed respectively therein, having a total area size, selected to be smaller than the area size of the aperture defining region in accordance with controlling the current level of an electron beam passing therethrough, while reducing Coulomb interaction of the electron beam passing through the aperture or apertures of each aperture defining portion of the pattern exposure block.
摘要:
A printing apparatus prevents forgery and alteration through lamination formed on a print surface of a medium in a simple structure, and improves the design effect. In the printing apparatus, a print pattern of one frame is stored in a memory component, on a film sheet F with a thermal transfer head, and a printing medium 37 is coated with the film sheet.