KR102155841B1 - Transparent glass plate having heat generating function and manufacturing method of laminated glass having heat generating function - Google Patents

Abstract

The transparent glass plate having a heating function according to the present invention is coated on a glass layer and at least a portion of the glass layer, and supplies power to the heating layer and the heating layer including a conductive material to generate heat by receiving power To do this, it includes first and second busbars formed on the heating layer.
In order to increase the contact area between the first busbar and the heating layer, a busbar insertion portion is formed in the first busbar contact portion of the heating layer, and at least a portion of the first busbar is inserted into the busbar insertion portion.

Description

Transparent glass plate with heating function and manufacturing method of laminated glass with heating function {TRANSPARENT GLASS PLATE HAVING HEAT GENERATING FUNCTION AND MANUFACTURING METHOD OF LAMINATED GLASS HAVING HEAT GENERATING FUNCTION}

The present invention relates to a transparent glass plate having a heat generating function, and a method of manufacturing a laminated glass having a heat generating function.

Transparent panes with electric heating layers are known per se and have already been described in several patent documents. In motor vehicles, a transparent plate glass with an electric heating layer is frequently used as a windshield, since the central field of view must not have a substantial visual limitation due to legal regulations. By the heat generated by the heating layer, condensed moisture, ice and snow can be removed in a short time.

However, the conventional transparent glass plate having a heat generating function has a problem that the heating performance is uneven on the entire surface of the glass plate. In addition, in order to increase the heating performance using a limited voltage in a motor vehicle or the like, a more improved glass plate structure was required.

The present invention relates to a transparent glass plate for solving the problem of uneven heating performance on the entire glass plate.

In addition, the present invention relates to a transparent glass plate having a heat generating function having an improved structure capable of improving the heating performance.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the transparent glass plate having a heat generating function according to an embodiment of the present invention is coated on a glass layer, at least a partial region of the glass layer, and includes a conductive material to generate heat by receiving power. In order to supply power to the heating layer and the heating layer, it includes first and second bus bars formed on the heating layer, and the first bus bar is a first bus bar in parallel with a first edge of the glass layer. The second bus bar extends in a direction, and the second bus bar extends parallel to a second edge, which is an edge facing the first edge, of the glass layer, and prevents thermal stress from being concentrated at the edge portion of the glass layer. For this purpose, at least one of the first and second bus bars is formed such that the width of the center is greater than the width of both ends based on the first direction, and the contact area between the first bus bar and the heating layer is increased. For this purpose, a busbar insertion portion is formed in the first busbar contact portion of the heating layer, and at least a portion of the first busbar is inserted into the busbar insertion portion.

A transparent glass plate having a heat generating function according to another embodiment of the present invention includes a glass layer, a heating layer coated on at least a portion of the glass layer, and including a conductive material to generate heat by receiving power, and the heating layer In order to supply power to the heating layer, including first and second bus bars formed on the heating layer, and in order to increase a contact area between the first bus bar and the heating layer, the first bus bar contact portion of the heating layer A busbar insertion portion is formed, at least a portion of the first busbar is inserted into the busbar insertion portion, and the heating layer includes a predetermined non-coated area in order to transmit radio waves. ), and in the uncoated area, a plurality of uncoated portions are formed to form arcs having different diameters around a predetermined reference point.

In order to achieve the above object, a method of manufacturing a laminated glass having a heat generating function according to an embodiment of the present invention includes: (a) a first glass layer coated on at least a portion of a heat generating layer including a conductive material, and a second A side surface of the second glass layer in contact with the first glass layer to prepare a glass layer and to protect the first bus bar of the first glass layer from visible light in a state in which the first and second glass layers are bonded Forming a blocking layer formed of a black enamel layer in a predetermined area of the heating layer, (b) forming a busbar insert by etching a portion of the first busbar contact portion of the heating layer, (c) 1 Printing the first bus bar on the bus bar contact portion and forming a second bus bar on the second bus bar contact portion, (d) The first and second terminals connected to an external power supply are connected to the first bus bar and the first bus bar. 2 attaching each of the bus bars, and (e) laminating the first glass layer, the polymer film, and the second glass layer in a predetermined lamination direction, and then bonding by heating while pressing in the lamination direction.

According to an embodiment of the present invention, one or more of the following effects are provided.

It is possible to have a heating performance more evenly in the entire area of the transparent glass plate having a heating function.

In addition, heating performance of a transparent glass plate having a heat generating function to which a predetermined voltage is applied, such as a motor vehicle, may be improved.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view for explaining a transparent glass plate having a heat generating function according to an embodiment of the present invention.
2 is a view for explaining a laminated glass plate including a transparent glass plate having a heat generating function according to an embodiment of the present invention.
3 and 4 are partially enlarged views of FIG. 1.
5A and 5B are views for explaining busbar insertion parts according to another embodiment of the present invention.
6 is a view for explaining the effect of applying the bus bar insertion unit of the present invention.
7 is a view for explaining a bus bar according to another embodiment of the present invention.
8 and 9A to 9D are views for explaining a radio wave transmission window according to an embodiment of the present invention.
10 is a flowchart of a method of manufacturing laminated glass having a heating function according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

1 is a view for explaining a transparent glass plate having a heat generating function according to an embodiment of the present invention, Figure 2 is for explaining a laminated glass plate including a transparent glass plate having a heat generating function according to an embodiment of the present invention It is a drawing.

In Fig. 1, the second glass layer 13 is omitted.

The transparent glass plate 1 having a heating function according to the present embodiment includes a first glass layer 11, a heating layer 20, and first and second bus bars 31 and 33.

The heating layer 20 is coated on at least a portion of the glass layer, and includes a conductive material to generate heat by receiving power.

The first and second busbars 31 and 33 are formed on the heating layer 20 to supply power to the heating layer. The first and second busbars 31 and 33 may have a width of about 5 to 20 mm, a thickness of about 5 to 30 μm, and a length of 800 to 1200 mm.

In order to increase the contact area between the first bus bar 31 and the heating layer 20, a bus bar insertion portion 21 is formed at the first bus bar contact portion of the heating layer 20, and the first bus bar 31 At least a portion of the is inserted into the bus bar insertion portion 21.

The first bus bar 31 is connected to the (-) terminal of the power supply unit 3, and the second bus bar 33 is connected to the (+) terminal, so that the heating layer 20 from the first bus bar 31 ), and electrons passing through the heating layer 20 may be transferred to the power supply unit 3 through the second bus bar 33. The power supply 3 may be electrically connected to the first and second busbars 31 and 33 by a conducting wire 5.

Current flows to the heating layer 20 and heat may be generated in the heating layer 20 due to the ohmic resistance.

Transparent panes having an electric heating layer are known per se and have already been described in several patent documents. In a motor vehicle, a transparent plate glass having an electric heating layer is frequently used as a windshield because the central field of view must not have a substantial visual limitation due to legal regulations. By the heat generated by the heating layer, condensed moisture, ice and snow can be removed in a short time.

With a conventional transparent pane having an electric heating layer, it can be considered that a heating current is usually introduced into the heating layer by at least one pair of strip- or band-shaped terminals (or busbars). At this time, it is desirable to introduce a heating current to the heating layer as uniformly as possible and to be widely distributed over the entire surface of the glass window. The electrical sheet resistance of the heating layer is relatively high in the case of materials currently used in industrial series manufacturing, and may be about several ohms per unit area. Nevertheless, in order to obtain sufficient heating power for practical applications, the supply voltage must be correspondingly high, but on-board voltages of 12 to 24 V are generally available, for example in motor vehicles.

The conventional transparent glass plate having a heat generating function has a problem in that the heating performance is uneven on the entire surface of the glass plate. In addition, in order to increase the heating performance using a limited voltage in a motor vehicle or the like, a more improved glass plate structure was required.

The transparent glass plate 1 having a heat generating function according to the present embodiment relates to an improved structure capable of solving the above problems and improving heating performance. More specifically, in the transparent glass plate 1 having a heat generating function according to the present embodiment, a bus bar insertion part is formed in the heating layer and at least a part of the bus bar is inserted in the heating layer so that heating is evenly performed on the front surface of the glass plate. The basic feature is that it is a shape that is inserted into the part.

Features of the transparent glass plate 1 having a heat generating function according to the present embodiment will be described in more detail below.

As the first glass layer 11, various conventional transparent glass plates may be applied, and a transparent glass plate capable of transmitting visible light is sufficient.

The heating layer 20 may be composed of a layer that is conventionally coated on a glass plate and provided to generate heat by receiving power.

The heating layer 20 may include one or more conductive metal layers. Ag is best suited for high transmittance and good conductivity in the visible region. The heating layer 20 may include one or more dielectric layers.

The conductive metal layer may be made of a material selected from Ag, Au, Cu, and combinations thereof. The conductive metal layer may be provided to have visible light transmission and electrical conductivity.

The dielectric layer may be made of a material selected from SI-based nitride, Ti-based oxide, Zn-based oxide, and combinations thereof. Si-based nitride may further include one or more elements selected from Zr, Sn, Nb, Al, Sb, Mo, Cr, Ti, and Ni. For example, the Si-based nitride may be a Si-based nitride containing Al. In addition, the Ti-based oxide may further include at least one element selected from Sn, Nb, Al, Sb, Mo, Cr, and Ni. The Zn-based oxide may further include at least one element selected from Sn, Nb, Al, Sb, Mo, Cr, Ti, and Ni. For example, it may include a Zn-based oxide containing Al.

The dielectric layer may block Na+ ions diffused from the lower soda-lime glass during heat treatment for strengthening and bending, and block oxygen or ions transferred to the functional conductive metal layer.

In addition, the dielectric layer serves to induce crystallization of the functional conductive metal layer by being deposited on the top and bottom of the functional conductive metal layer. Also, when the functional conductive metal layer is heat treated, the dielectric layer located above and below the heat-treated functional conductive metal layer As a result, the diffusion of oxygen gas can be prevented and optical defects such as aggregation can be suppressed.

Although not shown, in an embodiment, the heating layer 20 may include a plurality of conductive metal layers and a plurality of dielectric layers. In this case, a heating current is applied to each of the plurality of conductive metal layers to generate heat, and the coated glass plate may be heated by the generated heat. Since the ohmic resistance is inversely proportional to the cross-sectional area of the conducting wire, configuring a plurality of conductive metal layers with a relatively narrow cross-sectional area rather than configuring one conductive metal layer with a relatively wide cross-sectional area may be one method of enhancing heating performance.

When configuring the heating layer including a plurality of conductive metal layers, at least one may include Ag.

When configuring the heating layer including a plurality of dielectric layers, the plurality of dielectric layers may include a main dielectric layer including Si-based nitride or Ti-based oxide, and one or more sub-dielectric layers including Zn-based oxide.

Referring to FIG. 2, a busbar insertion portion 21 may be formed on a first bus bar contact portion of the heating layer 20 in contact with the first bus bar 31.

In one embodiment, the bus bar insertion part 21 is formed in a shape extending from one side of the heating layer 20 in contact with the first and second bus bars 31 and 33 to the other side facing the heating layer 20. I can. That is, the busbar insertion part 21 may have a shape extending from the upper side to the lower side of the heating layer 20 in FIG. 2. In other words, the bus bar insertion part 21 may have a shape that penetrates the heating layer 20 vertically.

On the other hand, although not shown, in another embodiment, the bus bar insertion part 21 is formed to a predetermined depth in a depth direction from one side of the heating layer 20 in contact with the bus bar toward the other side facing it, and It may have a shape in which the width decreases as is deeper. That is, based on the cross-section as shown in FIG. 2, the busbar insertion part 21 may be formed in a trapezoidal shape in which the upper side is wider than the lower side.

Alternatively, the side surface of the busbar insertion portion 21 need not necessarily be flat and may be formed in a curved shape more than once.

3 and 4 are partially enlarged views of FIG. 1.

Referring to FIG. 1, the first bus bar 31 may extend in a first direction parallel to the first edge of the first glass layer 11. In this embodiment, the first direction may be a horizontal direction.

The second bus bar 33 may extend parallel to the second edge of the first glass layer 11, which is an edge facing the first edge. In this embodiment, the second bus bar 33 may extend in the horizontal direction, like the first bus bar 31.

Here, the horizontal direction may be defined as including not only a horizontal direction in a strict sense, but also a horizontal direction having a predetermined curvature as a whole. For example, the first and second busbars on a glass plate having a predetermined curvature may also extend in a horizontal direction along the curvature of the glass plate. In this case, in a state where the glass plate is flat, the first and second bus bars may extend in a strict horizontal direction.

2 and 3, the bus bar insertion part 21 may extend in a first direction (or horizontal direction) in which the first bus bar 31 extends. The bus bar insertion part 21 may be a groove extending in a horizontal direction.

In this case, the width D1 of the groove is not greater than 1/3 of the width of the first bus bar based on the second direction (or vertical direction) that is perpendicular to the first direction (or horizontal direction). It can be formed not. When the width D1 of the groove is formed to be wider than a certain level, the contact area between the first bus bar 31 and the heating layer 20 is reduced, so that the amount of movement of electrons may be rather reduced.

Alternatively, the width D1 of the groove may be formed to be less than three times the thickness of the heating layer 20. When the width D1 of the groove is formed to be more than twice the thickness of the heating layer 20, the gap between the first bus bar 31 and the heating layer 20 is less than when the bus bar insertion part 21 is not formed. The contact area of the can be reduced. However, when comparing when the busbar insertion portion 21 is not formed and when the busbar insertion portion 21 is formed, the contact area between the first busbar 31 and the heating layer 20 is the same Even if, due to the difference in shape, the amount of movement of electrons may be greater when the busbar insertion portion 21 is formed. Accordingly, in consideration of this point, the width D1 of the groove may be formed to be three times or less than the thickness of the heating layer 20.

As described above, the bus bar insertion portion 21 is formed in the heating layer in a groove shape, and a portion of the first bus bar 31 is inserted into the bus bar insertion portion 21, so that the first bus bar 31 ) And the heating layer 20 may increase the contact area. In addition, electrons can be easily moved to a portion of the heating layer 20 adjacent to the first glass layer 11 through the portion of the first bus bar 31 inserted into the bus bar insertion portion 21. . Through this, the sheet resistance between the first bus bar 31 and the heating layer 20 is reduced, so that the amount of electrons flowing into the heating layer 20 may be increased. As a result, heat may be generated more uniformly over the entire surface of the heating layer 20, and the amount of heat generated may also be improved.

In one embodiment, the groove-shaped bus bar insertion portion 21 is closer to the center end of the first glass layer 11 than the edge side end of the first glass layer 11 of the first bus bar 31. By being formed, electrons may be provided to more effectively move toward the center of the heating layer 20.

5A and 5B are views for explaining busbar insertion parts according to another embodiment of the present invention.

In another embodiment, the bus bar insertion portion 21 is, on the first bus bar contact portion of the heating layer 20, the first direction in which the first bus bar 31 extends (in the horizontal direction in this embodiment) and It may include a plurality of busbar insertion portions 21 arranged in a second direction (vertical direction in this embodiment) that is a direction perpendicular to the first direction.

4, in this case, a plurality of busbar insertion portions 21 may be formed in a wider area on the first busbar contact portion of the heating layer 20 than the groove-shaped busbar insertion portion 21. have.

5A and 5B are enlarged views of only the first bus bar contact portion (dotted portion indicated by reference numeral 21) shown in FIG. 4 in the heating layer 20.

Referring to FIG. 5A, in an exemplary embodiment, each of the plurality of busbar insertion units 21 may have a rectangular shape.

The plurality of busbar insertion units 21 includes a first busbar insertion unit group consisting of busbar insertion units forming a matrix in a first direction (horizontal direction in Fig. 5A) and a second direction (vertical direction in Fig. 5A) ( 211) may be included. The first busbar insertion unit group 211 may be arranged to form the matrix 211a of the first busbar insertion unit.

The plurality of busbar insertion units 21 are formed of busbar insertion units forming a matrix in a first direction and a second direction between the matrices 211a formed by the first busbar insertion unit group 211. A busbar insert group 212 may be included. The second busbar insertion unit group 212 may be arranged to form a matrix 212a of the second busbar insertion unit.

That is, the plurality of busbar insertion portions 21 may form a chessboard-shaped pattern as a whole of the plurality of busbar insertion portions 21.

Referring to FIG. 5B, in an exemplary embodiment, each of the plurality of busbar insertion portions 21 may have a circular shape. Here, the circle may be a circle shape having the same radius from the center in a strict sense, or may be defined as including an approximate cause shape such as an ellipse.

The plurality of circular busbar insertion portions 21 may be arranged in a first direction (a horizontal direction in FIG. 5B) and a second direction (in a vertical direction in FIG. 5B) forming a plurality of rows and a plurality of columns.

6 is a view for explaining the effect of applying the bus bar insertion unit of the present invention.

6A is an image photographed by a thermal imaging camera in which a current is applied to a transparent glass plate having a heat generating function in a state in which the bus bar insertion part 21 is not formed.

6B is an image photographed with a thermal imaging camera in which a current is applied to a transparent glass plate having a heat generating function in a state in which the groove-shaped bus bar insert 21 is formed.

FIG. 6C is an image photographed with a thermal imaging camera when a current is applied to a transparent glass plate having a heat generating function in a state in which the busbar insert 21 is formed in a chessboard pattern as shown in FIG. 5A.

FIG. 6D is an image photographed by a thermal imaging camera in which a current is applied to a transparent glass plate having a heat generating function in a state in which the busbar insert 21 is formed in a dot pattern as shown in FIG. 5B.

Based on (a) of FIG. 6, it can be seen that the overall temperature of the glass plate has increased in (b), (c), and (d) in which the bus bar insert 21 is formed. In particular, when the bus bar insertion portion 21 is not formed, the temperature of the left and right edge portions of the glass plate in (b), (c), and (d) where the bus bar insertion portion 21 is formed is higher than the temperature of the left and right edge portions of the glass plate. It can be seen that the temperature is higher.

7 is a view for explaining a bus bar according to another embodiment of the present invention.

In one embodiment, the first and second busbars 31 and 33 may be formed with a constant width. For example, the first and second busbars 31 and 33 may have a width of about 20 mm.

In another embodiment, the first and second busbars 31 and 33 may be formed in a shape having a narrower width at both ends than a width at the center. For example, the first and second bus bars 31 and 33 may have a central width of about 20 mm, and both ends of the first and second bus bars 31 and 33 may have a width of about 5 mm. The first and second busbars 31 and 33 may have a shape whose width becomes narrower from the center to both ends.

A thermal image for comparing the heat generation performance of the transparent glass plate according to the shape of the first and second bus bars 31 and 33 is shown in FIG. 7.

Looking at the thermal image on the left, it can be seen that the upper left corner, upper right corner, lower left corner, and lower right corner of the transparent glass plate have a higher temperature than the center of the transparent glass plate. When the edge of the transparent glass plate has a high temperature, thermal stress is concentrated at the edge of the transparent glass plate, so that it can be easily damaged, the physical properties of the transparent glass plate are denatured, and consequently, there is a problem that the heating function may be deteriorated.

Accordingly, looking at the thermal image on the right, it can be seen that the temperature of the upper left corner, the upper right corner, the lower left corner, and the lower right corner of the transparent glass plate is lower than the thermal image on the left. That is, by forming the shapes of the first and second busbars 31 and 33 in this way, it is possible to prevent the edge portions of the glass plate from being damaged and deformed due to high temperature.

8 and 9A to 9D are views for explaining a radio wave transmission window according to an embodiment of the present invention.

Referring to FIG. 8, the heating layer 20 may have a shape including a predetermined non-coated area 25a so that radio waves can be transmitted.

The glass plate having a heat generating function has a problem that propagation is impossible due to the metal coating due to its characteristics. In order to allow the transmission and reception of signals through a glass plate like a motor vehicle, a radio wave transmission window is required on the glass plate having a heat generating function.

Referring to FIG. 9A, in an embodiment, a radio wave transmitting window 25 having a predetermined area may be provided in the uncoated area 25a of the heating layer 20. The radio wave transmission window 25 may be formed by etching a portion of the heating layer 20. That is, the portion where the radio wave transmission window 25 is provided may not be coated with a metal on the first glass layer 11.

Referring to FIG. 9B, in another embodiment, in the uncoated region 25a of the heating layer 20, a plurality of uncoated portions may be formed in the transverse and longitudinal directions. The region in which the plurality of uncoated portions are formed may be a square having a side length of about 150 to 200 mm.

Referring to FIG. 9C, in another embodiment, in the uncoated region 25a of the heating layer 20, a plurality of transverse uncoated portions 251 each extending in the transverse direction are provided in parallel with each other in the longitudinal direction. And, a plurality of longitudinal uncoated portions 252 each extending in the longitudinal direction may be provided in parallel with each other in the transverse direction. The region in which the plurality of uncoated portions are formed may be a square having a side length of about 150 to 200 mm. A square shape formed by the plurality of transverse uncoated portions 251 and the plurality of longitudinal uncoated portions 252 may be squares having a side length of about 1 to 2 mm.

Referring to FIG. 9D, in another embodiment, a plurality of uncoated portions 251 may be formed in one or more arcs in the uncoated region 25a of the heating layer 20.

When the radio wave transmission window 25 is formed, heat may be concentrated at a boundary between a portion coated with the heating layer 20 and an uncoated portion on the first glass layer 11. Thus, the first glass layer 11 is to form the radio wave transmitting window 25 by forming a plurality of uncoated portions in a pattern having a smaller size than when simply forming the radio wave transmitting window 25 with a predetermined area. It may be desirable to reduce the concentration of heat at the boundary between the portion on which the heating layer 20 is coated and the portion that is not coated.

10 is a flowchart of a method of manufacturing a laminated glass plate 1 having a heat generating function according to an embodiment of the present invention.

Hereinafter, a process of manufacturing a laminated glass having a heat generating function as shown in FIG. 2 will be described with reference to FIG. 10.

First, a first glass layer (11 in FIG. 2) and a second glass layer (13 in FIG. 2) coated on at least a portion of the heat generating layer 20 including a conductive material are prepared (S1100).

The first glass layer 11 may include the transparent glass plate 1 having a heat generating function described with reference to FIGS. 1 to 9.

The heating layer 20 may be coated over the entire area of the first glass layer 11. Alternatively, the heating layer 20 may be formed to a position separated by a predetermined distance from the edge portion of the first glass layer 11.

As the second glass layer 13, a conventional transparent glass plate may be applied. On the side of the second glass layer 13 in contact with the first glass layer 11, a blocking layer (FIG. 2 70) having a low transmittance of visible light may be coated on a predetermined area. The blocking layer (or opaque layer) may be formed of a black enamel layer. The blocking layer may be formed to protect the bus bar of the first glass layer 11 from visible light in a state in which the first and second glass layers 13 are bonded. To this end, the blocking layer may be formed on the edge of the second glass layer 13 on which the bus bar of the first glass layer 11 is disposed in a state in which the first and second glass layers 13 are bonded.

The first and second glass layers 13 may have a predetermined curvature. In this case, it is preferable that the first and second glass layers 13 are formed to have the same curvature.

Next, a part of the first bus bar contact portion of the heating layer 20 of the first glass layer 11 may be etched to form a bus bar insertion portion 21 of FIG. 2 (S1200 ).

For example, a part of the heating layer 20 may be etched using a method such as laser or chemical etching to form the busbar insertion part 21.

The process of etching the heating layer 20 may be performed after the process of polishing and cleaning one side of the first glass layer 11 coated with the heating layer 20.

The position at which the heating layer 20 is etched may exist inside the first glass layer 11 with a boundary at a position that is about 5 to 8 mm away from the edge of the first glass layer 11. This is to prevent oxidation due to etching the heating layer 20.

Next, a first bus bar (31 in FIG. 1) is printed on the first bus bar contact portion of the heating layer 20, and a second bus bar (33 in FIG. 1) is formed on the second bus bar contact portion (S1300). . That is, first and second busbars 31 and 33 are formed at predetermined positions of the heating layer 20.

The first and second bus bars 31 and 33 may be formed at a position 20 to 30 mm away from the edge of the first glass layer 11 in the in-plane direction.

The first and second busbars 31 and 33 may have a width of about 5 to 20 mm, a thickness of about 5 to 30 μm, and a length of 800 to 1200 mm.

The first and second busbars 31 and 33 may be formed on the first glass layer 11 by a printing method.

In one embodiment, when the separation distance between the first and second bus bars 31 and 33 is H1, and the length of the first bus bar 31 is H2, H1:H2 = 1:2 ~ 1.5: The first and second busbars 31 and 33 may be provided to become 2.

Next, the first and second terminals 41 and 43 connected to the external power source are attached to the first bus bar 31 and the second bus bar 33, respectively (S1400).

A conductive adhesive layer is applied on the first and second busbars 31 and 33 to attach the first and second terminals (41 and 43 in FIG. 1) to the first and second busbars 31 and 33. Can be prepared. For example, the first and second terminals 41 and 43 may be attached to the first and second busbars 31 and 33 using a conductive tape (50 in FIG. 2 ).

The first and second terminals 41 and 43 may be provided in a strip shape.

Next, after laminating the first glass layer 11, the polymer layer (60 in FIG. 2), and the second glass layer 13 in a predetermined lamination direction, they are bonded by heating while pressing in the lamination direction (S1500).

The polymer layer 60 may be formed of a thermoplastic PVB film.

In the above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following description by those of ordinary skill in the art to which the present invention pertains. Various implementations are possible within the equal range of the claims to be made.

1: glass plate
3: power supply
5: conducting wire
11: first glass layer
13: second glass layer
20: heating layer
21: busbar insert
211: first bus bar insertion part
211a: Matrix of the first busbar insert
212: 2nd busbar insertion part
212a: Matrix of the second busbar insert
25: radio wave transmission window
25a: uncoated area
251: transverse uncoated part
252: longitudinal uncoated portion
31: 1st bus bar
33: second bus bar
41: first terminal
43: second terminal
50: conductive tape
60: polymer layer
70: blocking layer
D1: width of groove

Claims (12)

Glass layer;
A heating layer coated on at least a portion of the glass layer and including a conductive material to generate heat by receiving power; And
In order to supply power to the heating layer, it includes first and second bus bars formed on the heating layer,
The first bus bar extends in a first direction parallel to the first edge of the glass layer,
The second bus bar extends parallel to a second edge of the glass layer, which is an edge facing the first edge,
In order to prevent the concentration of thermal stress at the edge of the glass layer, at least one of the first and second busbars is formed so that the width of the center portion is greater than the width of both ends of the first direction. Become,
In order to increase the contact area between the first busbar and the heating layer, a busbar insertion portion is formed at the first busbar contact portion of the heating layer, and at least a portion of the first busbar is inserted into the busbar insertion portion. Transparent glass plate with phosphorus, heat generation function. The method according to claim 1,
The bus bar insertion part is a transparent glass plate having a heat generating function of a shape extending from one side of the heating layer in contact with the bus bar to the other side of the heating layer. The method according to claim 1,
The bus bar insertion portion is formed to a predetermined depth in a depth direction from one side of the heating layer in contact with the bus bar toward the other side facing the heating layer, and has a shape in which the width decreases as the depth increases. Transparent glass plate with function. The method according to claim 1,
The first bus bar extends in a first direction parallel to the first edge of the glass layer,
The second bus bar extends parallel to a second edge of the glass layer, which is an edge facing the first edge,
The busbar insertion portion is a groove extending in the first direction, a transparent glass plate having a heat generating function. The method of claim 4,
The width of the groove is formed not greater than 1/3 of the width of the first bus bar based on a second direction that is a direction perpendicular to the first direction, a transparent glass plate having a heat generating function. The method of claim 5,
The groove is formed closer to the center side end of the glass layer than the edge side end of the glass layer of the first bus bar, a transparent glass plate having a heat generating function. The method according to claim 1,
The first bus bar extends in a first direction parallel to the first edge of the glass layer,
The busbar insertion unit includes a plurality of busbar insertion units arranged in the first direction and in a second direction perpendicular to the first direction, on the first busbar contact unit, a transparent glass plate having a heating function . The method of claim 7,
Each of the plurality of busbar inserts has a rectangular shape,
A first busbar insertion unit group consisting of busbar insertion units forming a matrix in the first direction and the second direction,
Including a second busbar insertion unit group consisting of busbar insertion units forming a matrix in the first direction and the second direction, between matrices formed by the first busbar insertion unit group,
As a whole, a transparent glass plate having a heat generating function in which the plurality of busbar inserts form a chessboard-shaped pattern. delete The method according to claim 1,
The heating layer has a shape including a predetermined non-coated area in order to allow radio waves to pass through, a transparent glass plate having a heating function. Glass layer;
A heating layer coated on at least a portion of the glass layer and including a conductive material to generate heat by receiving power; And
In order to supply power to the heating layer, it includes first and second bus bars formed on the heating layer,
In order to increase the contact area between the first busbar and the heating layer, a busbar insertion portion is formed at the first busbar contact portion of the heating layer, and at least a portion of the first busbar is inserted into the busbar insertion portion. And, the heating layer includes a predetermined non-coated area in order to allow the radio waves to transmit,
In the non-coated area, a plurality of non-coated portions are formed to form arcs having different diameters around a predetermined reference point. (a) preparing a first glass layer and a second glass layer in which a heating layer including a conductive material is coated on at least a portion of the region, and the first glass layer in a state in which the first and second glass layers are bonded. Forming a blocking layer formed of a black enamel layer in a predetermined area of a side of the second glass layer in contact with the first glass layer to protect the first busbar from visible light;
(b) forming a busbar insertion portion by etching a portion of the first busbar contact portion of the heating layer;
(c) printing the first bus bar on the first bus bar contact portion of the heating layer, and forming a second bus bar on the second bus bar contact portion;
(d) attaching a first terminal and a second terminal connected to an external power source to the first bus bar and the second bus bar, respectively; And
(e) laminating the first glass layer, the polymer film, and the second glass layer in a predetermined lamination direction, and then bonding by heating while pressing in the lamination direction. Manufacturing method.

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