Polyimides as dielectrics
AssigneeBASF SE
InventorsHans Juerg Kirner, Stephanie Leuenberger, Emmanuel Martin
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Abstract
Polyimides derived from a primary aromatic diamine and aromatic dianhydride mono-mer moieties, wherein one or more of said moieties contain at least one substituent on the aromatic ring selected from propyl and butyl, especially from isopropyl, isobutyl, tert.butyl, show good solubility and are well suitable as dielectric material in electronic devices such as capacitors and organic field effect transistors.
Claims20
An electronic device comprising a dielectric material which comprises a polyimide derived from a primary aromatic diamine and aromatic dianhydride monomer moieties, wherein a moiety comprises a substituent on the aromatic ring selected from the group consisting of propyl and butyl and wherein the primary aromatic diamine has formula
- wherein L1 independently is O, S, C1-10alkylene, phenylene or C(O);
- and each A is independently selected from the group consisting of H and C1-4alkyl, provided that at least 1 of 40 residues A are propyl or butyl.
A process of preparation of an electronic device, comprising:
- forming a layer comprising polyimide A by applying polyimide A on a layer of a conductor or semiconductor, or on the substrate;
- and
- irradiating and/or heating the layer comprising polyimide A to form a cured layer,
- wherein the polyimide A comprises moieties derived from a primary aromatic diamine with an aromatic dianhydride, where the diamine and/or dianhydride moieties are substituted on the aromatic ring by at least one alkyl moiety selected from the group consisting of propyl and butyl.
A polyimide derived from primary aromatic diamine and aromatic dianhydride monomer moieties, wherein the moiety comprises a substituent on the aromatic ring selected from the group consisting of propyl and butyl, wherein the polyimide conforms to structure
- wherein n is from 10 to 100,
- and wherein the diamine core is of formula
- wherein
- L1 independently is O, S, C1-10-alkylene, phenylene or C(O);
- L2 independently is selected from the group consisting of carbonyl, oxygen, and sulphur;
- and
- each A independently is selected from the group consisting of hydrogen and C1-C4alkyl, provided that at least 1 of 40 residues A in the polyimide A are propyl or butyl.
Dependencies are inferred from the claim text.