# US 12,594,773 B2 · Inkjet printing apparatus

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- Number: US 12,594,773 B2
- Document ID: US12594773B2
- Status: Granted
- Kind: B2
- Application number: 18/442,110
- Filed: 2024-02-15
- Published: 2024-12-12
- Granted: 2026-04-07
- Earliest claimed: 2023-06-08
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Jeong Woo Moon; Sung Yong Kang; Gounam Park; Jihoon Kim; Jong Sung You
- Web page: https://patentgrep.com/patent/US12594773B2

## CPC

- B41J 3/407: for marking on special material
- B41J 29/377: Cooling or ventilating arrangements
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

An inkjet printing apparatus according to an embodiment includes a stage for supporting a substrate and an inkjet head disposed above the stage and discharging resin toward the stage. The stage includes a first stage part having a first thermal conductivity, and a second stage part disposed around the first stage part and surrounding at least a portion of the first stage part, wherein the second stage part has a second thermal conductivity that is greater than the first thermal conductivity.

## Claims

### Claim 1

An inkjet printing apparatus, comprising:
a stage for supporting a substrate; and
an inkjet head disposed above the stage and discharging resin toward the stage,
wherein the stage comprises:
a first stage part having a first thermal conductivity; and
a second stage part disposed around the first stage part and surrounding at least a portion of the first stage part, the second stage part having a second thermal conductivity,
wherein the second thermal conductivity is greater than the first thermal conductivity, and
at least a portion of an upper surface of the first stage part is not covered by the second state part.

### Claim 2 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
the substrate covers an entirety of the first stage part and covers at least a portion of the second stage part.

### Claim 3 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
an edge of the substrate extends beyond an edge of the first stage part, and an edge of the second stage part extends beyond the edge of the substrate.

### Claim 4 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
an upper surface of the first stage part and an upper surface of the second stage part are coplanar.

### Claim 5 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
the second stage part includes a cooling unit.

### Claim 6 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
the second stage part is disposed at a corner of the first stage part.

### Claim 7 (depends on 6)

The inkjet printing apparatus of claim 6, wherein:
the second stage part is separable from the first stage part by being movable in a vertical direction relative to the first stage part while supporting the substrate.

### Claim 8 (depends on 6)

The inkjet printing apparatus of claim 6, further comprising:
a third stage part disposed around the first stage part and having a third thermal conductivity that is higher than the first thermal conductivity.

### Claim 9 (depends on 8)

The inkjet printing apparatus of claim 8, wherein:
the second stage part is separable from the third stage part, and
at least one of the second stage part and the third stage part is movable in a vertical direction while supporting the substrate.

### Claim 10 (depends on 8)

The inkjet printing apparatus of claim 8, wherein:
at least one of the second stage part and the third stage part includes a cooling unit.

### Claim 11 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
the first stage part includes at least one of polyetheretherketone, polycarbonate, polyoxymethylene, and polypropylene.

### Claim 12 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
the second stage part includes a metal.

### Claim 13 (depends on 1)

The inkjet printing apparatus of claim 1, wherein:
the substrate includes a first region above the first stage part and a second region above the second stage part, and
resin on the first region is at a higher temperature than resin on the second area.

### Claim 14 (depends on 13)

The inkjet printing apparatus of claim 13, wherein:
a width of the second region above the second stage part is about 0.3 mm to about 3 mm.

### Claim 15 (depends on 1)

The inkjet printing apparatus of claim 1, further comprising:
a third stage part overlapping at least a portion of the first stage part and having a higher thermal conductivity than the first stage part.

### Claim 16 (depends on 15)

The inkjet printing apparatus of claim 15, wherein:
an upper surface of the first stage part and an upper surface of the third stage part are coplanar.

### Claim 17 (depends on 15)

The inkjet printing apparatus of claim 15, wherein:
the first stage part includes at least one of polyetheretherketone, polycarbonate, polyoxymethylene, and polypropylene.

### Claim 18 (depends on 15)

The inkjet printing apparatus of claim 15, wherein:
the third stage part includes metal.

### Claim 19 (depends on 15)

The inkjet printing apparatus of claim 15, wherein:
the substrate includes a first region above the first stage part and a third region above the third stage part, and
resin on the first region has a higher temperature than resin on the third region.

### Claim 20 (depends on 15)

The inkjet printing apparatus of claim 15, wherein the third stage part includes a cooling unit.