摘要:
The invention provides photosensitive mixtures consisting of a polymer and a photoactive component which meet the requirements placed on photoresists. The polymer has carboxylic acid anhydride groups or phenolic hydroxyl groups and the photoactive component is an N-alkylated or N-arylated 1.4-dihydropyridine or a 1.4- dihydropyridine derivative of the following structure: ##STR1## where the R group is a (substituted) aryl group, which, in the ortho position to the bond with the dihydropyridine ring, carries a NO.sub.2 group; and R.sup.3 is alkyl, cyclohexyl or phenyl.
摘要:
Highly thermoresistant relief structures can be produced simply and cost-effectively from polybenzoxazole precursors which do not have any polymerizable groups, respectively without any photoactive components being present, when soluble hydroxypolyamides are applied in the form of a layer or film on a substrate and are irradiated through a mask by means of an UV-excimer laser with a power density >10.sup.5 W/cm.sup.2 per pulse, and are developed with an aqueous-alkaline developing agent and subsequently tempered.
摘要翻译:当将可溶性羟基聚酰胺以基层上的层或膜的形式施用并且被照射时,可以简单且经济地制造不具有任何可聚合基团的聚苯并恶唑前体,分别不存在任何光活性组分的高度耐热消除结构 通过具有每个脉冲功率密度> 105W / cm 2的UV-准分子激光器的掩模,并且用含水碱性显影剂显影并随后回火。
摘要:
A method for manufacturing multichip modules having layer sequences made of dielectric material with conducting tracks embedded therein is characterized by the following features: (1) a temperature-resistant, base-resistant polymer having a dielectric constant .ltoreq.3 is used as a dielectric material, which is applied to a non-conductive substrate and serves as an edge boundary for currentless, autocatalytic build-up of the conducting tracks; (2) the dielectric material is provided with a layer made of material which is soluble in organic solvents (lift-off layer); (3) the dielectric material and the lift-off layer are structured in a single lithographic step, either a direct or an indirect structuring taking place and grooves having an aspect ratio .gtoreq.1 being formed in the dielectric material; (4) a metallic seed layer is applied to the dielectric material or rather to the lift-off layer through vapor deposition in a directed manner; (5) the lift-off layer is removed using an organic solvent; and (6) conducting tracks are created in the grooves through currentless metal deposition.
摘要:
Cost-effective, highly heat-resistant positive resists based on oligomer and/or polymer polybenzoxazole precursors and diazo quinones possess a high [level of] stability in storage when the polybenzoxazole precursors are hydroxypolyamides of the following structure: ##STR1## whereby R, R*, R.sub.1, R*.sub.1, and R.sub.2 are aromatic groups, R.sub.3 is an aliphatic, cycloaliphatic or aromatic group having at least one alkenyl or alkynyl grouping and, with respect to n.sub.1, n.sub.2 and n.sub.3, the following applies:n.sub.1 =1 to 100, n.sub.3 and n.sub.3 =0 orn.sub.1 and n.sub.2 =1 to 100, n.sub.3 =0 orn.sub.2 =1 to 100, n.sub.1 and n.sub.3 =0 orn.sub.1, n.sub.2 and n.sub.3 =1 to 100 (whereby R.noteq.R* and/or R.noteq.R*.sub.1) orn.sub.1 and n.sub.3 =1 to 100, n.sub.2 =0 (whereby R.noteq.R* and/or R.sub.1 .noteq.R*.sub.1) ,provided that: n.sub.1 +n.sub.2 +n.sub.3 >3.
摘要:
A capacitive moisture sensor with a dielectric consisting of a moisture sensitive polymer which is mounted between two electrodes fulfills all the requirements of capacitive moisture sensors to a high degree, in particular with regard to a high long-term stability, when the organic polymer is a polybenzoxazole or a polybenzothiazole.
摘要:
A method for manufacturing highly heat resistant dielectrics is provided wherein an oligomeric and/or polymeric hydroxypolyamide is dissolved in an organic solvent and then applied to a substrate. The solvent is removed and the hydroxypolyamide is converted into a polybenzoxazole by annealing at a temperature of between 200.degree. to 500.degree. C. The resulting dielectrics are stable up to 550.degree. C. and have a continuous temperature resistance of more than 3 hours at 470.degree. C. The dielectrics are particularly well suited for applications in microelectronics.
摘要:
Hydroxypolyamides can be obtained in a simple and economical way in a chloride-free manner when(a) aromatic amino hydroxy carboxylic acids or(b) aromatic diaminodihydroxy compounds and aromatic dicarboxylic acids or(c) aromatic diaminodihydroxy compounds, aromatic dicarboxylic acids and aromatic amino hydroxy carboxylic acids are converted in the presence of 1-ethoxycarbonyl-2-ethoxy-1.2-dihydroquinoline, 1.1'-carbonyldioxy-di-1.2.3-benzotriazole or dicyclohexyl carbodiimide/1-hydroxy-1.2.3-benzotriazole.
摘要:
The invention provides heat-resistant positive resists and methods for preparing heat-resistant relief structures therefrom. The positive resists are based upon polybenzoxazole precursor stages and diazoquinones. The polybenzoxazole precursor stages are hydroxypolyamides with the following structure: ##STR1## where R, R*, R.sub.1 and R.sub.1 * are aromatic groups; n.sub.1 and n.sub.2 =1 to 100; and R.noteq.R* and/or R.sub.1 .noteq.R.sub.1 *.
摘要:
Cost-effective, negative resists having high thermal stability based on oligomeric and/or polymeric polybenzoxazole precursors are disclosed. Also disclosed are resist solutions having a high level of storage stability when they contain a photoactive component in the form of a bisazide and when the polybenzoxazole precursors are hydroxypolyamides having the following structure: ##STR1## where R, R*, R.sub.1, R.sub.1 * and R.sub.2 are aromatic groups, R.sub.3 is an aromatic group or a norbornene residue, and wherein n.sub.1, n.sub.2 and n.sub.3, are defined as follows:n.sub.1 =1 to 100, n.sub.2 and n.sub.3 =0 orn.sub.1 and n.sub.2 =1 to 100, n.sub.3 =0 orn.sub.2 =1 to 100, n.sub.1 and n.sub.3 =0 orn.sub.1, n.sub.2 and n.sub.3 =1 to 100 (with R.noteq.R* or R.sub.1 .noteq.R.sub.1 * or both) orn.sub.1 and n.sub.3 =1 to 100, n.sub.2 =0 (with R.noteq.R* or R.sub.1 .noteq.R.sub.1 * or both),on the condition that: n.sub.1 +n.sub.2 +n.sub.3 .gtoreq.3.
摘要:
The invention relates to a contact device which is arranged in a terminal compartment of a fuel cell stack and is used to electrically contact the fuel cell stack. According to the invention, the surface of said contact device is at least partially provided with a hydrophobic surface layer, facilitating the removal of water, e.g., condensation water, from the terminal compartment and thus from the fuel cell stack.