摘要:
The invention relates to a family of organic compounds of the 1(4 hydroxyphenyl)2(4' cyanophenyl) ethane ester type which have a smectic A type mesomorphic phase, to the mixture obtained from these compounds as well as the method for manufacturing the molecules of this family. The compound of the invention corresponds to the general chemical formula: ##STR1## n being between 1 and 15.
摘要:
The invention concerns a family of thermotropic polymers of the mesogenic the lateral group of which have at least one mesomorphous phase and obtained from a monomer having the general formula: ##STR1## in which R.sub.1 .dbd.CH.sub.3, Cl or H and 2.ltoreq.n.ltoreq.11.
摘要翻译:本发明涉及一系列介晶的热致聚合物,其侧基具有至少一个介晶相,并由具有以下通式的单体得到:其中R 1 = CH 3,Cl或H和 2 = n = 11。
摘要:
A metalized film for constructing capacitors formed from a flexible dielectric support medium comprising on at least one of its faces metalized parallel strips partially covered by lacquer strips parallel to the preceding ones, two successive metalized strips being partially covered by a lacquer strip whereas two successive lacquer strips partially cover the same metalized strip.
摘要:
The invention relates to a group of organic compounds of the 1-(4-hydroxyphenyl)-2-(4'-trifluoromethylphenyl)-ethane ester type having a mesomorphous phase of the smectic A type, to the mixtures obtained from said compounds, as well as to the process for producing the molecules of said group. The compound according to the invention is in accordance with the general chemical formula: ##STR1## whereby n can be between 1 and 15.
摘要:
The invention relates to resins used for manufacturing or reproducing masks in electronics.The photomasking composition corresponds to the general formula: ##STR1## in which R.sub.1, R.sub.1 ', R.sub.1 ", R.sub.2, R.sub.2 ', R.sub.2 " designate alkyl radicals whose principal chain contains from 1 to 10 carbon atoms, the symbols F, Cl and Br which designate the fluorine, chlorine and the bromine bearing indices a, b, c, a', b', and c' representing the number of these atoms which are zero or positive whole numbers, such as m, n, p.
摘要:
The invention relates to polymeric materials usable in non linear optics. The structure of the material of the invention includes a skeleton to which side chains are attached, the material resulting from the association of a first and a second monomer, the first monomer including a mesomorphogenic group connected to the skeleton by a spacer, the second monomer including a group capable of generating the second harmonic of an electromagnetic wave and also being connected to the skeleton by a spacer.
摘要:
The invention relates to electrochemical devices and in particular energy storage devices.The object of the invention is the use in such devices of at least one conductive support, covered by a polymer film, obtained by electrochemical polymerization of at least one monomer having at least one aromatic heterocycle with five links containing a single heteroatom, the polymer being in accordance with the general formula: (M.sup.+ X.sup.- y)n. The basic monomer is a pyrrole, thiophene, furan or indole and is substituted by at least one group of the alkyl, alkoxyl, hydroxyl aryl, substituted aryl, halogen, methyl trihalide, cyano, amino or dialkylamino type.
摘要:
An improved process for forming an embossed pattern through the use of a writing concentrated beam opening holes in a film capable of undergoing residue free evaporation. A layer of photoresist is overlayed with the film and upon being exposed and processed the layer supplies the prospective embossed pattern.
摘要:
An infrared detector based on pyroelectric material, of the type associated with a reading circuit prepared on a semiconductor substrate, the substrate also supporting conductive blocks designed to transmit the electrical signals generated by the pyroelectric material towards the reading circuit. Each conductive block corresponds to a picture element or pixel, wherein the detector is formed by a layer of pyroelectric material deposited on that side of the semiconductor layer having the conductive blocks. The pyroelectric material has a thermal conductivity of K
摘要:
The invention relates to a doped polyacetylene film for forming an organic semiconductor or even a conductor of a metallic type. It serves to make the doping more homogeneous and improves the stability over a period of time. The process consists of using as the dopant a salt of an element such as chrome, nickel, iron, titanium, tungsten, or molybdenum belonging to the transition metals, or a salt of an element such as europium or ytterbium belonging to the lanthanides. Doping takes place by immersing the film in a solution having a low dopant concentration, e.g. in toluene, and maintaining the system at low pressure and ordinary temperature for a period of a few days, as a function of the desired doping level and conductivity.