Coating apparatus

Abstract

A coating apparatus related to an embodiment of the present invention comprises: a main body including a manifold provided so as to allow slurry to stay therein and a plurality of insulating liquid injection ports provided to be partitioned from the manifold and provided so as to allow an insulating liquid to flow therethrough, and having a slit part for discharging the slurry and the insulating liquid; and a coater shim mounted inside the main body and provided with a plurality of slurry flow paths through which the slurry in the manifold is guided to the slit part and a plurality of insulating liquid flow paths through which the insulating liquid is guided to the slit part, wherein a pair of insulating liquid injection ports disposed between two adjacent slurry flow paths may be formed such that a gap between the pair of insulating liquid injection ports narrows from the outer surface of the main body toward the coater shim.

Description

Coating device

[0001] The present invention relates to a coater device, and more specifically, to a coating device for applying a slurry and an insulating liquid toward a moving substrate.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0159225 filed November 11, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003] Lithium-ion batteries are widely used as an energy source for various electronic products as well as mobile devices due to their high energy density and operating voltage, as well as their excellent storage and lifespan characteristics.

[0004] A secondary battery includes an electrode having an electrode coating layer and an insulating layer formed on the surface of a current collector. The electrode of the secondary battery is manufactured by using a coater to apply a slurry containing an active material and the like, and an insulating liquid containing an insulating material and the like, respectively, to the surface of a current collector and drying them.

[0005] In some cases, multiple electrode coating layers are coated in a strip-shaped pattern on a single current collector (multi-lane coating). The slurry is filled into a manifold and discharged toward the discharge port of the coater. The insulating liquid can be coated on each of the two boundaries of the anode coating layer.

[0006] FIG. 1 is a drawing for explaining a conventional coater (30) for simultaneous coating.

[0007] A conventional coater (30) may include a lower die (40), a coater shim (50), and an upper die (60).

[0008] The lower die (40) is provided with a manifold (42) in which the slurry is retained.

[0009] The upper die (60) may be provided with an insulating liquid injection port (62) configured to supply the insulating liquid to the coater shim (50). The upper die (60) is coupled to the lower die (40) to cover the manifold (42).

[0010] The above coater shim (50) may be interposed between the upper die (60) and the lower die (40). The coater shim (50) may be fixed to the upper die (60) and the lower die (40) through a fastening member (not shown).

[0011] The above coater shim (50) is provided with a slurry channel (52) through which the slurry is discharged, and an insulating liquid channel (55) through which an insulating liquid is discharged for edge coating. The above coater shim (50) is provided with a channel hole (55a).

[0012] The above slurry is introduced into the manifold (42) through the slurry inlet (45). The above slurry is discharged from the manifold (42) to the outside of the coater (30) through the slurry channel (52).

[0013] The insulating liquid flows into each insulating liquid channel (55) through the insulating liquid injection port (62) and the channel hole (55a), and can be discharged to the outside of the coater (30) through each insulating liquid channel (55). The insulating liquid is discharged to the boundary of the slurry channel (52) and can form an insulating layer at the boundary of the slurry layer on the substrate.

[0014] Two insulating fluid passages (55: 55b, 55c) can be branched and provided through a passage hole (55a) located in the central part of the above-mentioned coater core (50) (between adjacent slurry passages (52)).

[0015] At this time, the flow rate of the insulating fluid must be evenly divided into two insulating fluid channels (55b, 55c) branched from one fluid channel (55a).

[0016] However, due to assembly tolerances or other disturbances between the upper die (60) and the lower die (40), there is a phenomenon where the flow rate of the insulating fluid branching from one fluid passage hole (55a) into two insulating fluid passages (55b, 55c) is not evenly distributed.

[0017] In addition, if the alignment of the upper die (60), the coater shim (50), and the lower die (40) is slightly misaligned during assembly, there is a problem in that the flow rate of the insulating liquid flowing through the insulating liquid channels (55) on both sides differs due to the difference in the length of the path between the two insulating liquid channels (55b, 55c) going out to both sides, and thus the width and thickness of each insulating layer differ.

[0018] In addition, the flow rate of the insulating liquid discharged from each insulating liquid channel (55) may vary due to processing deviations of the insulating liquid injection port (62) and the coater shim (50). Accordingly, when simultaneous coating of the slurry and insulating liquid, it is necessary to develop a technology that can individually control the flow rate of the insulating liquid supplied to each insulating liquid channel (55).

[0019] The present invention aims to provide a coating device for simultaneously applying an insulating liquid to a slurry and the boundary of the slurry toward a moving substrate.

[0020] The present invention aims to provide a coating device capable of individually supplying insulating liquid to the boundary between the retaining portion and the unretaining portion in a coating pattern having a narrow width of the unretaining portion, wherein a pair of insulating liquid injection ports provided at the center and around the center of the main body are diagonally machined into the main body.

[0021] The present invention aims to provide a coating device capable of applying an insulating liquid to the boundaries of a slurry while individually adjusting the flow rate of the insulating liquid.

[0022] A coating device according to one embodiment of the present invention comprises a manifold arranged to retain a slurry, a plurality of insulating liquid inlets arranged to be partitioned from the manifold and arranged to allow an insulating liquid to flow, a main body having a slit portion for discharging the slurry and the insulating liquid, and a coater shim mounted inside the main body, having a plurality of slurry flow paths for guiding the slurry in the manifold to the slit portion and a plurality of insulating liquid flow paths for guiding the insulating liquid to the slit portion. Additionally, a pair of insulating liquid inlets disposed between two adjacent slurry flow paths is formed such that the gap between the pair of insulating liquid inlets narrows as it goes from the outer surface of the main body toward the coater shim.

[0023] In addition, a coating device related to one embodiment of the present invention includes a manifold provided to retain a slurry and a plurality of insulating liquid inlets provided to be partitioned from the manifold and provided to allow an insulating liquid to flow, a main body installed facing a substrate for discharging the slurry and the insulating liquid, and a coater shim mounted inside the main body having a slurry channel for guiding the slurry to the slit channel and an insulating liquid channel for guiding the insulating liquid to the slit channel, and a pair of insulating liquid inlets provided in the center or around the center of the main body may be formed such that the gap between the pair of insulating liquid inlets narrows in the width direction of the slit channel as it goes from the outer surface of the main body toward the first inner surface where the manifold is provided.

[0024] The plurality of insulating liquid injection ports may have an injection hole provided on the outer surface of the main body and a discharge hole provided on the first inner surface of the main body.

[0025] In addition, the above-mentioned coater shim may have a channel hole that fluidly connects the discharge hole and the insulating fluid channel.

[0026] In addition, each discharge hole can be provided to allow fluid movement individually with each insulating fluid path through the fluid path hole provided in the cotter shim.

[0027] A pair of insulating liquid injection ports provided in the center or around the center of the main body above represents a pair of insulating liquid injection ports positioned between two adjacent slurry channels.

[0028] A pair of insulating liquid injection ports positioned between two adjacent slurry channels may be configured such that the second gap between the pair of discharge holes in the width direction of the slit section is narrower than the first gap between the pair of injection holes.

[0029] It may include a plurality of insulating fluid supply pipes mounted on the main body to individually supply insulating fluid to each insulating fluid injection port. Additionally, the plurality of insulating fluid supply pipes may be individually connected to the insulating fluid injection ports. Furthermore, the pair of injection holes may be provided so that the pair of insulating fluid supply pipes do not interfere with each other.

[0030] In addition, a pair of insulating liquid injection ports positioned between two adjacent slurry channels may include a diagonal section that obliquely connects the injection hole and the discharge hole in a direction different from the width direction of the slit section.

[0031] A pair of insulating liquid injection ports may be provided such that the spacing between the pair of diagonal sections narrows as one moves from the injection hole toward the discharge hole.

[0032] The above pair of insulating liquid injection ports may be provided such that the above pair of diagonal sections are symmetrical in the width direction of the slit section.

[0033] The above coater shim may include a guide that protrudes from one side of the coater shim in a direction perpendicular to the width direction of the slit portion and partitions the slurry flow path in the width direction of the slit portion. Additionally, the guide may be provided with a pair of flow path holes arranged to be individually connected to the pair of discharge holes, and a pair of insulating liquid flow paths extending from each of the flow path holes.

[0034] In addition, a pair of discharge holes of a pair of insulating liquid injection ports are spaced apart in the width direction of the slit portion and can be provided to allow fluid movement individually with each insulating liquid flow path provided in the cotter shim.

[0035] In addition, the above pair of Euro holes may be spaced apart in the width direction of the slit portion.

[0036] The above pair of insulating fluid channels are formed by being recessed on one side of the guide, and a pair of discharge ports, which are the ends of the above pair of insulating fluid channels, may be spaced apart in the width direction of the slit portion.

[0037] The coating device may include a plurality of insulating liquid supply pipes arranged to be individually mounted in the plurality of insulating liquid injection ports, and a plurality of pumps (also called insulating liquid pumps) connected to each insulating liquid supply pipe and arranged to supply the insulating liquid to the insulating liquid supply pipes.

[0038] In addition, the coating device may include a controller configured to individually control the operation of the plurality of pumps and to individually adjust the flow rate of the insulating liquid supplied to each insulating liquid inlet.

[0039] Additionally, the main body may include a first die having the manifold and the plurality of insulating liquid injection ports, and a second die mounted on the first die to cover the manifold and arranged to form a slit portion between the first die and the main body for discharging the slurry and the insulating liquid.

[0040] In addition, the coater shim may be interposed between the first die and the second die such that the slurry flow path is fluidly movable with the manifold and the insulating fluid flow path is fluidly movable with each insulating fluid inlet.

[0041] The above manifold is provided by being recessed into the first inner surface of the first die, and the pair of insulating liquid injection ports may be provided at a position spaced apart from the manifold to penetrate the first inner surface and the outer surface of the first die in a direction different from the width direction of the slit portion.

[0042] In addition, the pair of insulating liquid injection ports mentioned above may be arranged symmetrically in the width direction of the slit portion.

[0043] A coating device related to one embodiment of the present invention comprises a manifold provided for retaining a slurry and a first die having a plurality of insulating liquid injection ports partitioned from the manifold and provided for injecting an insulating liquid, a second die mounted on the first die to cover the manifold and provided to form a slit portion between the first die and the first die for discharging the slurry and the insulating liquid, and a coater shim interposed between the first die and the second die, having a slurry flow path for guiding the slurry to the slit portion and an insulating liquid flow path for guiding the insulating liquid to the slit portion, wherein the plurality of insulating liquid injection ports each include a pair of insulating liquid injection ports provided for injecting an insulating liquid at the edges of the opposing slurries, and the gap between the pair of insulating liquid injection ports may be formed to narrow in the width direction of the slit portion as it approaches the manifold from the outer surface of the first die.

[0044] As described above, the coating device related to one embodiment of the present invention can have the following effects.

[0045] In this invention, a pair of insulating liquid injection ports provided at the center and around the center of the main body are diagonally machined into the main body, thereby allowing the insulating liquid to be supplied individually to the boundaries of each slurry layer even when the width between adjacent slurry layers on the substrate is narrow.

[0046] In addition, the insulating liquid injection port has an injection hole through which the insulating liquid is injected into the main body and an exhaust hole through which the insulating liquid is discharged to the coater core. At this time, a pair of insulating liquid injection ports formed in the center of the main body are formed (diagonally processed) such that the distance between the pair of exhaust holes is narrower than the distance between the pair of injection holes, and accordingly, even when the width between adjacent slurry layers on the substrate is narrow, the insulating liquid can be supplied individually to the boundary of each slurry layer.

[0047] In addition, each insulating liquid injection port is configured to be individually connected to each insulating liquid flow path of the coater shim, and accordingly, the flow rate of the insulating liquid supplied to each insulating liquid flow path can be individually adjusted.

[0048] Figure 1 schematically illustrates an exploded perspective view of a conventional coater.

[0049] FIG. 2 is a schematic perspective view of a coating device according to one embodiment of the present invention.

[0050] FIG. 3 schematically illustrates an exploded perspective view of a coating device according to one embodiment of the present invention.

[0051] Figure 4 schematically illustrates the AA cross-sectional view of Figure 3.

[0052] FIG. 5 schematically illustrates a perspective view of a coater core viewed from the first die side in one embodiment of the present invention.

[0053] FIG. 6 is a cross-sectional view of a coating apparatus showing the discharge flow of a slurry and an insulating liquid discharged toward a substrate in one embodiment of the present invention.

[0054] Hereinafter, a coating apparatus according to an embodiment of the present invention will be described with reference to the attached drawings.

[0055] FIG. 2 schematically illustrates a perspective view of a coating device according to one embodiment of the present invention, and FIG. 3 schematically illustrates an exploded perspective view of a coating device according to one embodiment of the present invention.

[0056] A coating device (100) related to one embodiment of the present invention includes a manifold (123) arranged to retain a slurry (S) and a plurality of insulating liquid inlets (125 to 127) arranged to be partitioned from the manifold (123) and arranged to allow an insulating liquid (C) to flow through, and a main body (110) having a slit portion (119) for discharging the slurry (S) and the insulating liquid (C). The main body (110) may be installed such that the slit portion (119) faces a substrate (10).

[0057] FIG. 4 is a schematic cross-sectional view of AA of FIG. 3, FIG. 5 is a schematic perspective view of a coater core viewed from the first die side in one embodiment of the present invention, and FIG. 6 is a cross-sectional view of a coating apparatus showing the discharge flow of a slurry and an insulating liquid discharged toward a substrate in one embodiment of the present invention.

[0058] The coating device (100) includes a coater shim (140) mounted inside the main body (110) and provided with a plurality of slurry channels (144) that guide the slurry (S) to the slit section (119) and a plurality of insulating liquid channels (145a to 147a) that guide the insulating liquid (C) to the slit section (119).

[0059] Additionally, the gap between a pair of insulating liquid inlets (126 and 127) provided in the center or around the center of the main body (110) may be formed to narrow in the width direction (e.g., Y-axis direction) of the slit portion (119) as it goes from the outer surface of the main body (110) toward the first inner surface (122) where the manifold (123) is provided. Referring to FIGS. 3 and 4, the gap between a pair of insulating liquid inlets (126 and 127) located between two adjacent slurry channels (144) may be formed to narrow along the direction toward the cotter shim (140) from the outer surface of the main body (110).

[0060] In this document, the width direction (e.g., Y-axis direction) of the slit portion (119) is a direction parallel to the width direction (e.g., Y-axis direction) of the substrate (10). Additionally, the X-axis direction indicates the discharge direction of the slurry and insulating liquid to the outside of the main body, and the Z-axis direction indicates the thickness direction of the lip portion, which is the direction from the first die of the main body to the second die.

[0061] The coating device (100) is a device for performing a coating process for manufacturing an electrode for a secondary battery. The coating device (100) may be configured to apply two types of coating liquids to a moving substrate (10). The two types of coating liquids may include a slurry (S) and an insulating liquid (C).

[0062] The coating device (100) may be configured to simultaneously apply a slurry (S) and an insulating liquid (C) on one surface of a substrate (10). In this document, the slurry (S) and the insulating liquid (C) may refer to a coating liquid that flows through the internal space of the main body (110) and is discharged toward the substrate (10).

[0063] The above material (10) may be a current collector. For example, the current collector may be an anode current collector. For example, the anode current collector may include stainless steel, aluminum, nickel, titanium, calcined carbon, etc. Additionally, the current collector may be a cathode current collector. For example, the cathode current collector may include copper, stainless steel, nickel, titanium, calcined carbon, etc.

[0064] The above slurry (S) can be applied onto the above substrate (10) to form a slurry layer (11). The above slurry (S) is a coating liquid containing an electrode active material and is a material for forming an electrode for a secondary battery. The electrode can be manufactured as a negative electrode or a positive electrode depending on the type of electrode active material included in the above slurry (S), that is, depending on whether it is a negative electrode active material or a positive electrode active material.

[0065] The above slurry (S) may include an electrode active material, a conductive material, a binder, and an additive. The electrode active material may include a positive electrode active material or a negative electrode active material. For example, the positive electrode active material may include a lithium metal composite oxide containing nickel (Ni), cobalt (Co), and manganese (Mn).

[0066] In addition, for example, the above-mentioned cathode active material may include one or more of a carbon material and a silicon material. The above-mentioned carbon material may refer to a carbon material having carbon atoms as its main component. The above-mentioned silicon material is a particle containing silicon (Si) as its main component as a metal component, and may include one or more of silicon (Si) particles and silicon oxide particles.

[0067] The insulating liquid (C) may be applied to the edge of the slurry (S), that is, to the boundary between the slurry layer and the substrate (10). The insulating liquid (C) may be applied to the substrate (10) to cover one or both sides of the slurry layer (11) applied on the substrate (10). The insulating liquid (C) may be applied to the substrate (10) to cover one or both sides of the slurry layer (11).

[0068] The insulating liquid (C) is a material provided to form an insulating layer (12, see FIG. 6) at the edge of the slurry (S).

[0069] The insulating liquid (C) may include inorganic particles, a phenolic compound, and a binder. For example, the inorganic particles may include one or more aluminum minerals selected from boehmite, gibbsite, diaspore, aunite, and nepheline.

[0070] For example, the phenol particles can increase the dispersibility of inorganic particles contained in the insulating solution (C). Such phenol compounds may include one or more of tannic acid, baicalein, luteolin, taxifolin, myricetin, quercetin, rutin, catechin, epigallocatechin gallate, butein, piceatenol, pyrogallic acid, ellagic acid, amylose, amylopectin, and xanthan gum.

[0071] Referring to FIGS. 2 and 3, the coating device (100) may include a main body (110) with a coater shim (140) interposed therein, an insulating liquid supply pipe (150), a slurry pump (P1), a plurality of pumps (P2), and a controller (190).

[0072] Referring to FIG. 6, the main body (110) may be installed facing the coating roll (300) parallel to the width direction (e.g., Y-axis direction) of the substrate (10). The coating roll refers to one of the rolls arranged to guide the movement of the substrate (10) so that the substrate (10) travels in a roll-to-roll manner, and is positioned facing the coating device (100).

[0073] The above main body (110) includes a first die (120) and a second die (130). The first die (120) and the second die (130) may be referred to as a lower die and an upper die, respectively, depending on their installation position in the height direction (e.g., z-axis direction). The first die (120) may be referred to as the lower die, and the second die (130) may be referred to as the upper die.

[0074] The first die (120) may include a manifold (123) arranged to retain a slurry (S) and a plurality of insulating liquid injection ports (125 to 127) partitioned from the manifold (123) and arranged to inject an insulating liquid (C).

[0075] The second die (130) may be mounted on the first die (120) to cover the manifold (123). The second die (130) may be provided to form a slit portion (119) for discharging the slurry (S) and the insulating liquid (C) between it and the first die (120).

[0076] Referring to FIG. 2, the slit portion (119) is provided between the first lip (129) of the first die (120) and the second lip (139) of the second die (130). The slit portion (119) may be provided parallel to the width direction (e.g., Y-axis direction) of the main body (110). The width direction (e.g., Y-axis direction) of the slit portion (119) is a direction parallel to the width direction (e.g., Y-axis direction) of the main body (110).

[0077] The slit portion (119) is a discharge port provided to discharge the coating liquid, the slurry (S), and the insulating liquid (C). The slit portion (119) is an opening provided in the form of a slit that is narrowly spaced between the first lip (129) and the second lip (139) and extends long in the width direction (e.g., Y-axis direction) of the main body (110).

[0078] The above manifold (123) is formed by being recessed into the first inner surface (122) of the first die (120). The first inner surface (122) is the part where the first die (120) and the second die (130) face each other, and is the surface on which the coater shim (140) is seated.

[0079] The above manifold (123) may be formed in a predetermined space in the first die (120). The manifold (123) is provided to be open in a direction toward the second die (130). The manifold (123) may be provided to extend in the width direction of the slit portion (119) (e.g., Y-axis direction), that is, in the width direction of the main body (110) (e.g., Y-axis direction).

[0080] A slurry injection port (124) may be provided in the above manifold (123). The slurry injection port (124) is an injection passage for the slurry (S). A slurry supply pipe (160) through which slurry is supplied from the outside may be connected to the slurry injection port (124).

[0081] The slurry supply pipe (160) connects the slurry inlet (124) and the slurry pump (P2). The slurry (S) can be supplied to the slurry supply pipe (160) at a constant pressure through the slurry (S) pump (P2).

[0082] The above slurry (S) is received in the manifold (123) and can be discharged from the manifold (123) to the slit section (119) via the slurry flow path (144) of the coater shim (140).

[0083] Referring to FIGS. 3 and 4, the plurality of insulating liquid injection ports (125 to 127) may be provided by penetrating the first inner surface (122) and the outer surface (121) of the first die (120) in a direction different from the width direction of the slit portion (119) at a position spaced apart from the manifold (123).

[0084] The insulating liquid injection ports (125 to 127) are passages provided in the first die (120) to guide the insulating liquid (C) into the insulating liquid flow paths (145a to 147a) of the coater shim (140). That is, the insulating liquid injection ports (125 to 127) are passages through which the insulating liquid (C) flows, and can be provided to be partitioned from the manifold (123).

[0085] The plurality of insulating liquid injection ports (125 to 127) may be spaced apart in the width direction (e.g., Y-axis direction) of the main body (110). Each insulating liquid injection port (125 to 127) may be fluidly movable separately from each insulating liquid flow path (145a to 147a) provided in the cotter shim (140).

[0086] Among the plurality of insulating liquid injection ports (125 to 127) above, the insulating liquid injection port (125) positioned on the edge side of the first die (120) based on the width direction (e.g., Y-axis direction) of the slit portion (119) can be provided by vertically penetrating the first inner surface (122) of the first die (120) in the z-axis direction.

[0087] Among the plurality of insulating liquid inlets (125 to 127), a pair of adjacent insulating liquid inlets (126 and 127) are spaced apart in the width direction (e.g., Y-axis direction) of the slit portion (119). In this document, an adjacent pair of insulating liquid inlets (126 and 127) refers to two insulating liquid inlets located between two adjacent slurry channels (144).

[0088] The above pair of insulating liquid inlets (126 and 127) may be diagonally machined on the first die (120) such that the spacing in the width direction (e.g., Y-axis direction) of the slit portion (119) becomes narrower as it moves from the outer surface (121) of the first die (120) toward the manifold (123) (e.g., z-axis direction). Additionally, the above pair of insulating liquid inlets (126 and 127) may be formed such that the spacing in the width direction (e.g., Y-axis direction) of the slit portion (119) becomes narrower as it moves from the outer surface of the first die (120) toward the first surface (122) (e.g., z-axis direction). The spacing may refer to the spacing between the centers of the pair of insulating liquid inlets (126 and 127).

[0089] Each insulating liquid injection port (125, 126, 127) has an injection hole (125a, 126a, 127a) provided on the outer surface (121) of the first die (120) and an exhaust hole (125b, 126b, 127b) provided on the first inner surface (122) of the first die (120). The injection hole (125a, 126a, 127a) is the inlet of the insulating liquid injection port (125, 126, 127). The exhaust hole (125b, 126b, 127b) is the outlet of the insulating liquid injection port (125, 126, 127). The insulating liquid injection port (125, 126, 127) is provided such that the injection hole (125a, 126a, 127a) and the discharge hole (125b, 126b, 127b) form a single passage.

[0090] A pair of insulating liquid injection ports (126 and 127) among the plurality of insulating liquid injection ports (125 to 127) may be provided in the center or around the center of the main body (110).

[0091] The above pair of insulating liquid injection ports (126 and 127) can be machined diagonally into the first die (120) in a direction different from the width direction of the slit portion (119) (e.g., z-axis direction).

[0092] The above pair of insulating liquid inlets (126 and 127) may be arranged such that the gap between the pair of insulating liquid inlets (126 and 127) narrows as it goes from the outer surface (121) of the first die (120) to the first inner surface (122). The above pair of insulating liquid inlets (125 to 127) may be arranged symmetrically in the width direction (e.g., Y-axis direction) of the slit portion (119).

[0093] The insulating liquid injection port (126, 127) positioned at the center or around the center of the first die (120) may include a diagonal section (126c) that obliquely connects the injection hole (126a, 127a) and the discharge hole (126b, 127b) in a direction different from the width direction of the slit section (119) (e.g., z-axis direction).

[0094] A pair of insulating liquid injection ports (126 and 127) may be provided such that the spacing between a pair of diagonal sections (126c, 127c) narrows as it moves from the injection holes (126a, 127a) toward the discharge holes (126b, 127b). The pair of insulating liquid injection ports (126 and 127) may be provided such that the pair of diagonal sections (126c, 127c) are symmetrical in the width direction (e.g., Y-axis direction) of the slit section (119).

[0095] The above pair of injection holes (126a, 127a) may be spaced apart in the width direction (e.g., Y-axis direction) of the slit portion (119) on the outer surface (121) of the first die (120). For example, the above pair of injection holes (126a, 127a) may be spaced apart by a first interval (D1) along the width direction (e.g., Y-axis direction) of the slit portion (119) on the outer surface (121) of the first die (120). The first interval (D1) may be the distance between the centers of the pair of injection holes (126a, 127a).

[0096] The first gap (D1) of the above pair of injection holes (126a, 127a) is a gap in which the pair of insulating liquid supply pipes (150) mounted on the first die (120) do not interfere with each other.

[0097] The above insulating liquid supply pipe (150) is a pipe that is fluidly connected to the insulating liquid injection port (125 to 127) through the injection hole (125a to 127a).

[0098] The above pair of discharge holes (126b, 127b) may be spaced apart in the width direction (e.g., Y-axis direction) of the slit portion (119) from the first inner surface (122) of the first die (120).

[0099] The above pair of discharge holes (126b, 127b) may be fluidly movable separately from each insulating fluid path (145a to 147a) provided in the cotter shim (140).

[0100] As illustrated in FIGS. 2 and 3, the cotter shim (140) may be interposed between the first die (120) and the second die (130). The cotter shim (140) may be coupled to the first die (120) and the second die (130) through fastening means (not shown), such as a bolt.

[0101] As illustrated in FIG. 3, the cotter shim (140) has a first shim surface (141) arranged to be in contact with the first inner surface (122) of the first die (120) and a second shim surface (142) arranged to be in contact with the second die (130).

[0102] The above-mentioned coater shim (140) has a plurality of slurry channels (144) and a plurality of insulating channels (145a to 147a).

[0103] Referring to FIG. 3, the coater shim (140) can be mounted between the first die (120) and the second die (130) such that the slurry channel (144) is fluidly movable with the manifold (123) and the insulating fluid channel (145a to 147a) is fluidly movable with each insulating fluid inlet (125 to 127).

[0104] The slurry channel (144) is provided to guide the slurry (S) remaining in the manifold (123) to the slit section (119). The slurry channel (144) may be provided by penetrating a portion of the first core surface (141) and the second core surface (142) of the cotter core (140).

[0105] The insulating fluid passages (145a to 147a) may be provided to guide the insulating fluid (C) injected into the insulating fluid injection ports (125 to 127) to the slit portion (119).

[0106] The above insulating fluid passages (145a to 147a) can be formed by being recessed in the first core surface (141) of the cotter core (140).

[0107] Additionally, the insulating fluid passages (145a to 147a) may be provided to be connected to passage holes (145 to 147) penetrating both sides of the cotter core (140), namely the first core surface (141) and the second core surface (142). The passage holes (145 to 147) are fluidly connected to the insulating fluid injection ports (125 to 127).

[0108] The above coater shim (140) has a guide (143) for partitioning a plurality of slurry channels (144). The coater shim (140) may be mounted on the first die (120) such that the guide (143) covers a portion of the manifold (123) and a portion of the first inner surface (122) of the first die (120). The guide (143) is located between two adjacent slurry channels (144).

[0109] The guide (143) may be provided with a pair of fluid passage holes (146, 147) and a pair of insulating fluid passages (146a, 147a). The guide (143) is provided to protrude in a direction perpendicular to the width direction (e.g., Y-axis direction) of the slit portion (119) (e.g., x-axis direction). The guide (143) may be provided to cover a portion of the manifold (123) when the first core surface (141) of the coater core (140) is seated on the first inner surface (122) of the first die (120).

[0110] The above pair of Euro holes (146, 147) may be provided to be partitioned from the slurry Euro (144).

[0111] The above pair of Euro holes (146, 147) can be fluidly movable with each discharge hole (126b, 127b) of the above pair of insulating liquid injection ports (126 and 127).

[0112] The above pair of flow holes (146, 147) may be spaced apart in the width direction (e.g., Y-axis direction) of the slit portion (119) by a second gap (D2) between the above pair of discharge holes (126b, 127b). The second gap (D2) may be the gap between the centers of the pair of discharge holes (126b, 127b) and the gap between the centers of the pair of flow holes (146, 147).

[0113] The insulating fluid passages (146a to 147a) may be formed by extending from the passage holes (145 to 147) and being recessed from the first core surface (141) of the guide (143). The cotter core (140) may be mounted on the first inner surface (122) of the first die (120) so that the insulating fluid passages (145a to 147a) form a passage between the first inner surface (122) of the first die (120).

[0114] The insulating liquid channels (145a to 147a) may be arranged to be partitioned from the slurry channel (144). The insulating liquid channels (145a to 147a) may be spaced apart from the slurry channel (144) in the width direction (e.g., Y-axis direction) of the slit portion (119) and may be arranged to discharge the insulating liquid (C) toward the boundary side of the slurry channel (144).

[0115] The above insulating fluid passage (145a to 147a) may be provided with discharge ports (145b to 147b) configured to discharge the insulating fluid (C) toward the slit portion (119).

[0116] The discharge ports (146b, 147b) of the above pair of insulating fluid channels (146a, 147a) may be spaced apart in the width direction (e.g., Y-axis direction) of the slit portion (119).

[0117] The discharge ports (145b to 147b) of the insulating fluid channels (145a to 147a) may be provided adjacent to the boundary of the slurry channel (144). The discharge ports (145b to 147b) are the ends of the insulating fluid channels (145a to 147a).

[0118] The discharge ports (146b, 147b) of the pair of insulating fluid channels (146a, 147a) may have a gap narrower than the first gap (D1) between the pair of injection holes (126a, 127a) of the pair of insulating fluid injection ports (126 and 127).

[0119] The discharge port (146b, 147b) of the pair of insulating fluid channels (146a, 147a) may be provided to be narrower than the second gap (D2) between the pair of discharge holes (126b, 127b) of the pair of insulating fluid injection ports (126 and 127).

[0120] The third gap (D3) between the discharge ports (146b, 147b) of the above pair of insulating fluid channels (146a, 147a) may be the gap between the centers of the discharge ports (146b, 147b).

[0121] In this document, W1 and W2 represent the width of the slurry layer (11) applied on the substrate (10) or the width of the slurry channel (144), and W3 represents the gap between two adjacent slurry layers (11). The third gap (D3) may be smaller than the gap between two adjacent slurry layers (11).

[0122] The insulating liquid (C) injected into the insulating liquid injection port (125 to 127) is guided to the flow path hole (145 to 147) of the cotter shim (140) through the discharge hole (125b to 127b) of the insulating liquid injection port (125 to 127), and can be discharged to the slit portion (119) via the insulating liquid flow path (145a to 147a) extended from the flow path hole (145 to 147).

[0123] As seen above, a pair of adjacent insulating liquid supply pipes (150) can be mounted on the first die (120) without interference between them, and even if the gap (W3) between adjacent slurry layers (11) is narrow, insulating liquid (C) can be supplied to the boundary of the slurry layers (11).

[0124] The insulating liquid supply pipe (150) may be connected to the first die (120) to individually supply insulating liquid (C) to each insulating liquid injection port (125 to 127). The insulating liquid supply pipe (150) may be connected to the injection holes of the insulating liquid injection ports (125 to 127).

[0125] Additionally, the pair of injection holes (126a, 127a) may be provided on the outer surface (121) of the first die (120) so that the pair of insulating liquid supply pipes (150) do not interfere with each other. At this time, a pump (P2) may be installed in each insulating liquid supply pipe (150).

[0126] The above slurry pump (P1) and a plurality of pumps (P2) can be individually controlled by a controller (190). The controller (190) can individually adjust the flow rate of the insulating liquid (C) supplied to each insulating liquid inlet (125 to 127) through the pump (P2).

[0127] In this way, even if the gap (W3) between adjacent slurry layers (11) is narrow, the insulating liquid (C) can be uniformly supplied individually to each insulating liquid flow path (145a to 147a) of the coater shim (140).

[0128] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims.

[0129] According to a coating device related to one embodiment of the present invention, a pair of insulating liquid injection ports are diagonally machined in the main body, so that insulating liquid can be individually supplied to the boundaries of each slurry layer even when the width between adjacent slurry layers on the substrate is narrow.

Claims

1. A main body comprising a manifold arranged to retain a slurry and a plurality of insulating liquid inlets arranged to be partitioned from the manifold and arranged to allow an insulating liquid to flow, and having a slit portion for discharging the slurry and the insulating liquid; and It includes a coater shim mounted inside the main body and provided with a plurality of slurry flow paths for guiding the slurry in the manifold to the slit section and a plurality of insulating liquid flow paths for guiding the insulating liquid to the slit section. A coating device having a pair of insulating liquid injection ports positioned between two adjacent slurry channels, wherein the gap between the pair of insulating liquid injection ports narrows as it goes from the outer surface of the main body toward the coater shim.

2. In Paragraph 1, The plurality of insulating liquid injection ports have an injection hole provided on the outer surface of the main body and a discharge hole provided on the first inner surface of the main body that contacts the cotter shim, and A coating device characterized by the above-mentioned coater shim having a channel hole that fluidly connects a discharge hole and an insulating fluid channel.

3. In Paragraph 2, A coating device characterized by a pair of insulating liquid injection ports disposed between two adjacent slurry channels, wherein the second gap between the pair of discharge holes in the width direction of the slit section is narrower than the first gap between the pair of injection holes.

4. In Paragraph 3, A coating device characterized by additionally including a plurality of insulating liquid supply pipes mounted on the main body to individually supply insulating liquid to each insulating liquid injection port.

5. In Paragraph 2, A coating device comprising a pair of insulating liquid injection ports positioned between two adjacent slurry channels, and a diagonal section connecting the injection hole and the discharge hole obliquely in a direction different from the width direction of the slit section.

6. In Paragraph 5, A coating device characterized by the fact that the above pair of insulating liquid injection ports are arranged such that the spacing between the pair of diagonal sections becomes narrower as they move from the injection hole toward the discharge hole.

7. In Paragraph 6, A coating device characterized in that the above pair of insulating liquid injection ports are arranged such that the above pair of diagonal sections are symmetrically arranged in the width direction of the slit section.

8. In Paragraph 2, A coating device characterized in that a pair of discharge holes of a pair of insulating liquid injection ports are spaced apart in the width direction of the slit portion and are provided to be fluidly movable separately from each insulating liquid flow path provided in the coater shim.

9. In Paragraph 8, The above-mentioned coater core includes a guide that protrudes from one side of the coater core in a direction perpendicular to the width direction of the slit portion and partitions the slurry flow path in the width direction of the slit portion. A coating device characterized by the above guide having a pair of flow path holes arranged to be individually connected to the above pair of discharge holes, and a pair of insulating fluid flow paths extending from each of the flow path holes.

10. In Paragraph 9, A coating device characterized in that the above pair of insulating fluid channels are formed by being recessed on one side of the guide, and the above pair of discharge ports, which are the ends of the above pair of insulating fluid channels, are spaced apart in the width direction of the slit portion.

11. In Paragraph 1, A plurality of insulating fluid supply pipes arranged to be individually mounted in the plurality of insulating fluid injection ports above; and A coating device further comprising a plurality of pumps connected to each insulating liquid supply pipe and arranged to supply the insulating liquid to the insulating liquid supply pipe.

12. In Paragraph 11, A coating device further comprising a controller configured to individually control the operation of the plurality of pumps and to individually adjust the flow rate of the insulating liquid supplied to each insulating liquid injection port.

13. In Paragraph 1, The above main body is A first die having the above manifold and the above plurality of insulating fluid injection ports; and It includes a second die mounted on the first die to cover the manifold and arranged to form a slit portion between the first die and the second die for discharging the slurry and the insulating liquid, A coating device characterized in that the above-described coater shim is interposed between the first die and the second die such that the slurry flow path is fluidly movable with the manifold and the insulating liquid flow path is fluidly movable with each insulating liquid inlet.

14. In Paragraph 13, The above manifold is formed by being recessed into the first inner surface of the above first die, and A coating device characterized in that the above pair of insulating liquid injection ports penetrate the first die in a direction different from the width direction of the slit portion at a position spaced apart from the above manifold.

15. In Paragraph 14, A coating device characterized in that the above pair of insulating liquid injection ports are arranged symmetrically in the width direction of the slit portion.

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