# US 2018/0323386 A1 · Crosslinkable polymeric materials for dielectric layers in electronic devices

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- Number: US 2018/0323386 A1
- Document ID: US20180323386A1
- Status: Published application
- Kind: A1
- Application number: 15/773,881
- Filed: 2016-11-15
- Published: 2018-11-08
- Earliest claimed: 2015-11-18
- Assignees: Altana AG
- Applicants: Altana AG
- Inventors: Martin Eggert; Stephan Feser; Sascha Tödter-König
- Web page: https://patentgrep.com/patent/US20180323386A1

## CPC

- H10K 10/471: {the gate dielectric comprising only organic materials}
- C08F 12/18: Chlorine
- C08F 12/32: containing two or more rings
- C08F 20/22: Esters containing halogen
- C08F 20/28: containing no aromatic rings in the alcohol moiety
- C08F 20/40: Esters of unsaturated alcohols {, e.g. allyl (meth)acrylate}
- H10K 85/141: {comprising aliphatic or olefinic chains, e.g. poly N-vinylcarbazol, PVC or PTFE}
- H10K 85/151: {Copolymers}
- H10D 1/68: Capacitors having no potential barriers
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

Compositions for providing a dielectric layer in an electronic device wherein the composition comprises a polymer which polymer contains one or more building blocks, wherein at least 25 mol % of the total number of building blocks in the polymer are of the general formula having olefinic oligo-dihydrodicyclopentadienyl functionalities.

## Claims

### Claim 1

Composition for providing a dielectric layer in an electronic device which composition comprises a polymer which polymer contains one or more units, wherein at least 25 mol % of the total number of units in the polymer are the following units (A) with crosslinkable side groups,
in which
X independently at each occurrence is a methylene group or oxygen,
R independently at each occurrence is a methyl group or hydrogen,
L1 is a divalent group which connects the polymer chain to the side group and
L2 is a divalent group which connects the polymer chain to the side group, or is hydrogen,
with the proviso that if L2 is hydrogen, the side group in question is absent.

### Claim 2 (depends on 1)

Composition according to claim 1, characterized in that
L1 is selected from the group consisting of carbonyl, carbonyloxyethyl, carbonyloxyisopropyl, carbonyloxyethylamide, phenyl and benzyl groups;
L2 is H;
X is CH2;
R independently is CH3 or H;
n is 0.

### Claim 3 (depends on 1)

Composition according to claim 1, characterized in that
L1 is a carbonyl or carbonyloxyethyl group;
L2 is H;
R is CH3 or H, preferably CH3.
n is 0.

### Claim 4 (depends on 1)

Composition according to claim 1, characterized in that
L1,2 is a carbonyl unit;
X is CH2;
R is H.
n is 0.

### Claim 5 (depends on 1)

Composition according to claim 1, characterized in that
L1 is a benzyl unit;
R is H.
n is 0.

### Claim 6 (depends on 1)

Composition according to claim 1, characterized in that independently of the unit (A) there is at least one second unit selected from the group consisting of
and mixtures thereof, where
L in each case is ethyloxy, isopropyloxy or ethylamidoxy or not present, preferably not present.

### Claim 7 (depends on 1)

Composition according to claim 1, characterized in that the polymer comprises, as further unit, a methacrylate which has a linear, branched or cyclic hydrocarbon group which comprises 1-18 carbon atoms, the hydrogen atoms being optionally substituted by fluorine atoms.

### Claim 8 (depends on 1)

Composition according to claim 1, characterized in that a further unit comprises styrene, ethylene, methyl vinyl ether or octadecene.

### Claim 9 (depends on 1)

Composition according to claim 1, characterized in that the polymer comprises one of the following units or combination of units:

### Claim 10 (depends on 1)

Electronic device which has at least one dielectric layer characterized in that the dielectric layer comprises or consists of
a) a crosslinked polymer according to claim 1,
b) optionally a further polymer, preferably methacrylate polymers,
c) optionally further additives, such as free radical photoinitiators, stabilizers, optionally adhesion promoters.

### Claim 11 (depends on 10)

Electronic device according to claim 10, characterized in that it comprises an organic semiconductor layer which is in contact with the dielectric layer.

### Claim 12 (depends on 10)

Electronic device according to claim 10, characterized in that it is or comprises an organic field-effect transistor in top gate configuration or in bottom gate configuration.

### Claim 13

Method for preparing an electronic device which has at least one dielectric layer, the preparation of the dielectric layer comprising or consisting of steps a) to c):
a) deposition of a formulation which comprises
i) at least one polymer which polymer contains one or more units, wherein at least 5 mol % of the total number of units in the polymer are the following units (A) with crosslinkable side groups,
in which
X independently at each occurrence is a methylene group or oxygen,
R independently at each occurrence is a methyl group or hydrogen,
L1 is a divalent group which connects the polymer chain to the side group and
L2 is a divalent group which connects the polymer chain to the side group, or is hydrogen,
with the proviso that if L2 is hydrogen, the side group in question is absent.
ii) at least one photoinitiator and
iii) at least one organic solvent
on a substrate,
b) removal of the solvent,
c) photocrosslinking of the resulting layer by actinic radiation.

### Claim 14 (depends on 1)

Method according to 13 wherein the formulation comprises a composition according to claim 1.

### Claim 15 (depends on 10)

Electronic device according to claim 10, characterized in that it is or comprises a thin-film capacitor.