Abstract:
A bis-o-aminophenol has a formula I These bis-o-aminophenols permit the preparation of polybenzoxazoles stabilized at high temperatures. The bis-o-aminophenols are preferably prepared from the corresponding diols, which are first nitrosated. The nitroso compound is then reduced to the amino compound by hydrogenation with Pd/C and H2.
Abstract:
Production of a porous layer includes using a composition which includes a first polymer component and a second polymer component, the first polymer component being polyhydroxyamide and/or polybenzoxazole and stable at a temperature at which the second polymer component decomposes and volatilizes. If the composition is heated to the decomposition temperature of the second polymer component, the second component volatilizes and a porous layer that contains the first component remains.
Abstract:
Novel poly-o-hydroxyamides can be cyclized to give polybenzoxazoles which have a good diffusion barrier effect with respect to metals. The poly-o-hydroxyamides can be applied to a semiconductor substrate by customary techniques and converted into the polybenzoxazole in a simple manner by heating. This results in a good barrier layer with respect to diffusion of metals. This allows the diffusion barrier between conductor track and dielectric to be substantially dispensed.
Abstract:
A method for metallizing dielectrics includes applying a photosensitive dielectric to a substrate. The dielectric is then exposed to light through a mask, is seeded with a metal and is subjected to a temperature treatment. Afterwards, the dielectric is chemically metallized. Alternatively, the dielectric can be first be seeded with a metal after being applied to the substrate, and can then be exposed to light through a mask. Afterwards, excess seeding material is removed and the dielectric is chemically metallized.
Abstract:
A process for producing structured or patterned protective and insulating layers includes applying a solution of a photosensitive polyhydroxyamide or polyhydroxyimide to a substrate and drying. The layer is patterned or structured by irradiation with UV light or X-rays through the use of a mask or by guidance of a UV or electron beam and by subsequent aqueous-alkali development. The patterned or structured layer is irradiated over the whole area with UV light and then tempered or heat-treated.
Abstract:
The invention relates to novel o-nitrophenol derivatives and o-nitrothiophenol derivatives of the following structure: where: A1 to A3 are—independently of one another—H, F, CH3, CF3, OCH3, OCF3, CH2CH3, CF2CF3, OCH2CH3 or OCF2CF3; T is O or S; R is an aliphatic or araliphatic radical; and R* is H or R.
Abstract:
The invention relates to novel bis-o-aminophenols, and bis-o-aminothiophenols of the following structure: ##STR1## where A.sup.1 to A.sup.3 are--independently of one another--H, CH.sub.3, OCH.sub.3, CH.sub.2 CH.sub.3, or OCH.sub.2 CH.sub.3T is O or S, andZ is a carbocyclic or heterocyclic aromatic radical.
Abstract:
The invention relates to novel o-aminophenolcarboxylic acids, and o-aminothiophenolcarboxylic acids of the following structure: ##STR1## where A.sup.1 to A.sup.7 are--independently of one another--H, F, CH.sub.3, CF.sub.3, OCH.sub.3, OCF.sub.3, CH.sub.2 CH.sub.3, CF.sub.2 CF.sub.3, OCH.sub.2 CH.sub.3 or OCF.sub.2 CF.sub.3, where at least one of the radicals A.sup.1 to A.sup.3 must be F or an F-containing group; T is O or S, and m is 0 or 1; and Z is a carbocyclic or heterocyclic aromatic radical.
Abstract:
In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted with a dicarboxylic acid derivative of the following structure: ##STR1## with D=O, S, or NH and where R* is the parent body of the dicarboxylic acid and at least one of the groups R.sup.1 and R.sup.2 is CN or NO.sub.2.
Abstract:
In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted at a temperature of .ltoreq.0.degree. C. with a mixed dianhydride of a dicarboxylic acid and a sulfonic acid with the following structure: E--SO.sub.2 --O--CO--R*--CO--O--SO.sub.2 --E where E is an (optionally substituted) methyl, phenyl, or naphthyl group and R* is the parent body of the dicarboxylic acid.