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.6 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.6 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:
A photoresist suitable for the production of structures in the submicron range contains the following components:a polymer component with carboxylic acid anhydride functions and carboxylic acid tert. butyl ester groupsa photoinitiator which releases an acid when exposed anda suitable solvent.
Abstract:
UV-hardenable and thermally hardenable epoxy resins for the underfilling process in electrical and electronic components are provided. A new casting resin component has an increased storage stability at room temperature of at least 6 months and improved characteristics for the underfilling process including faster hardening and lower viscosity. Filler material with a maximum grain size of 20 .mu.m and a siloxane component are provided in addition to the casting resin formulation.
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 method of synthesis of polybenzoxazole and polybenzothiazole precursors, a dicarboxylic acid or a dicarboxylaic acid ester is reacted with a bis-o-aminophenol or bis-o-aminothiophenol in a suitable solvent in the presence of an activating reagent having the following structure: ##STR1##
Abstract:
The invention concerns a photolithographic method of producing sub-micron structural features by applying to a substrate a photosensitive resist layer consisting of a polymer containing tert-butyl ester or tert-butoxycarbonyloxy groups, a photosensitive component (in the form of an ester of naphthoquinonediazide-4-sulfonic acid and an aromatic hydroxy compound) and a suitable solvent. The photoresist is then dried, exposed in an imaging manner, subjected to a temperature treatment in the range between 120.degree. and 150.degree. C. for a period of 100 to 600 seconds, and wet-developed (single-layer resist system). The invention also concerns a method in which a corresponding two-layer resist system is used.
Abstract:
In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-hydroxyamide or a bis-o-mercaptoamide is reacted with a dihydroxy compound in the presence of a basic catalyst.
Abstract:
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.
Abstract:
A finely structurable resist system for a dry development process is provided. A latent image is produced in a light-sensitive layer by imaging exposure and is intensified by treatment with, for example, an organosilicon compound. The etching resistance to an oxygen plasma is simultaneously increased. The light-sensitive layer preferably comprises anhydride or epoxy groups that are suitable for reaction with the functional groups of the organosilicon compounds. A silylizing treatment can be implemented with a solution or emulsion in a simple apparatus or can be implemented in the vapor phase.
Abstract:
A photolithographic method for structure generation in bilayer processes is provided. Pursuant to the method, a dimensional reserve is produced in a top resist structure by chemical treatment with a bulging agent. The expansion preferably is performed by treatment with an aqueous solution. The expansion can be set such that the dimensional loss to be anticipated in further etchings of the bottom resist or, respectively, of the wafer is exactly compensated for.