# US 2019/0378969 A1 · Metal strip and coil coating process

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0378969 A1
- Document ID: US20190378969A1
- Status: Published application
- Kind: A1
- Application number: 16/065,286
- Filed: 2016-08-10
- Published: 2019-12-12
- Earliest claimed: 2015-12-23
- Assignees: voestalpine Stahl GmbH
- Applicants: Voestalpine Stahl GmbH
- Inventors: Michaela SCHATZL-LINDER; Bernhard JAKOBY; Wolfgang HILBER; Johannes SELL; Herbert ENSER; Siegfried BAUER; Markus KRAUSE
- Web page: https://patentgrep.com/patent/US20190378969A1

## CPC

- H05K 3/1275: {by other printing techniques, e.g. letterpress printing, intaglio printing, lithographic printing, offset printing}
- H10N 30/101: {with electrical and mechanical input and output, e.g. having combined actuator and sensor parts}
- G01J 5/024: {Special manufacturing steps or sacrificial layers or layer structures}
- G01J 5/34: using capacitors, e.g. pyroelectric capacitors
- H05K 3/4673: {Application methods or materials of intermediate insulating layers not specially adapted to any one of the previous methods of adding a circuit layer (similar methods for protective coatings H05K3/28)}
- H10N 15/10: Thermoelectric devices using thermal change of the dielectric constant, e.g. working above and below the Curie point
- H10N 19/00: Integrated devices, or assemblies of multiple devices, comprising at least one thermoelectric or thermomagnetic element covered by groups H10N10/00 - H10N15/00
- H10N 30/06: Forming electrodes or interconnections, e.g. leads or terminals
- H10N 30/077: by liquid phase deposition
- H10N 30/098: Forming organic materials
- H10N 30/857: Macromolecular compositions
- H10N 30/878: {the principal material being non-metallic, e.g. oxide or carbon based}
- H10N 39/00: Integrated devices, or assemblies of multiple devices, comprising at least one piezoelectric, electrostrictive or magnetostrictive element covered by groups H10N30/00 – H10N35/00
- H05K 1/056: {the metal substrate being covered by an organic insulating layer}
- H05K 3/28: Applying non-metallic protective coatings {(H05K3/0091 takes precedence; methods for intermediate insulating layers for build-up multilayer circuits H05K3/4673)}
- H05K 2203/1461: Applying or finishing the circuit pattern after another process, e.g. after filling of vias with conductive paste, after making printed resistors
- H05K 2203/1545: Continuous processing, i.e. involving rolls moving a band-like or solid carrier along a continuous production path
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

A metal strip and a coil coating process for multilayer coating of an endless metal strip are disclosed in which a curable polymer primer is applied to a flat side of the metal strip with the aid of a roller application in order to form an electrically insulating primer layer, a curable polymer varnish is applied to this primer layer with the aid of a roller application and cured in order to form an electrically insulating: varnish layer, and at least one electric conductor layer is printed at least in some areas between the primer layer and the varnish layer. In order to enable a stable and inexpensive electrical functionalization of a metal strip, it is proposed that an electrically polarizable layer be applied to at least some regions of the electric conductor layer and that the electric conductor layer and electrically polarizable layer be applied by means of a wet-in-wet process.

## Claims

### Claim 1

A coil coating process for multilayer coating of an endless metal strip, comprising:
applying a curable polymer primer to a flat side of the metal strip with the aid of a roller application in order to form an electrically insulating primer layer;
applying a curable polymer varnish to the primer layer with the aid of a roller application and curing the polymer varnish in order to form an electrically insulating varnish layer;
printing at least one electric conductor layer at least in some areas between the primer layer and the varnish layer; and
applying an electrically polarizable layer to at least some regions of the electric conductor layer, and applying the electric conductor layer and the electrically polarizable layer using a wet-in-wet process.

### Claim 2 (depends on 1)

The coil coating process according to claim 1, comprising producing a piezoelectric and/or pyroelectric property in the electrically polarizable layer using a polarization.

### Claim 3 (depends on 1)

The coil coating, process according to claim 1, comprising applying PEDOT:PSS as the electric conductor layer and/or applying a PVDF layer—in particular a P[VDF-TrFE] layer—as the electrically polarizable layer.

### Claim 4 (depends on 1)

The coil coating process according to claim 1, wherein the electric conductor layer and the electrically polarizable layer are cured simultaneously.

### Claim 5 (depends on 1)

The coil coating process according to claim 1, further comprising printing a second electric conductor layer onto the electrically polarizable layer.

### Claim 6 (depends on 5)

The coil coating process according to claim 5, wherein the first and second electric conductor layers are electrically contacted and as a result, the electrically polarizable layer is polarized.

### Claim 7 (depends on 1)

The coil coating process according to claim 1, comprising printing the electric conductor layer with the aid of a roller-to-roller process, in particular a roller application.

### Claim 8 (depends on 7)

The coil coating process according to claim 7, wherein the electric conductor layer is printed in a pattern.

### Claim 9 (depends on 1)

The coil coating process according to claim 1, wherein on the flat side of the metal strip, a conversion layer is produced onto which the curable polymer primer is applied.

### Claim 10 (depends on 1)

The coil coating process according to claim 1, wherein the electric conductor layer is printed onto the primer layer, which has been pre-cured at least to above a gel point.

### Claim 11 (depends on 1)

The coil coating process according to claim 1, wherein both the primer and the varnish are chemically cross-linked.

### Claim 12 (depends on 1)

A metal strip coated with the aid of a coil coating process according to claim 1, comprising:
an electrically insulating primer layer provided on a flat side of the metal strip;
an electrically insulating varnish layer provided on the electrically insulating primer layer;
at least one electric conductor layer printed between the primer layer and the varnish layer; and
an electrically polarized layer that adjoins the conductor layer via a boundary layer or boundary surface, which is produced by a wet-in-wet application of the electrically polarized layer and the conductor layer.

### Claim 13 (depends on 12)

The metal strip according to claim 12, wherein the metal strip has a second electric conductor layer that is provided on the electrically polarized layer.

### Claim 14 (depends on 13)

The metal strip according to claim 13, wherein the first and second electric conductor layers and the electrically polarized layer form at least one actuator and/or one sensor on the metal strip.

### Claim 15 (depends on 14)

The metal strip according to claim 14, wherein the actuator and the sensor, which are electrically connected to each other, cooperate to provide oscillation compensation on the metal strip.

### Claim 16 (depends on 13)

The metal strip according to claim 13, wherein the electrically polarized layer is pyroelectric and the sensor is an infrared sensor.

### Claim 17 (depends on 12)

The metal strip according to claim 12, wherein the electric conductor layer contains PEDOT:PSS and the electrically polarizable layer contains PVDF, in particular P[VDF-TrFE].