JP2013076934A - Bonding structure and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bonding structure that has a high yield rate without any residual air bubble in a predetermined region between work-pieces bonded together via an adhesive agent, and further to provide a manufacturing method thereof.SOLUTION: A bonding structure includes: a sealing portion 3 formed of an adhesive agent around a visual field range W on a work-piece S1; a portion 4 filled with the adhesive agent where the adhesive agent is filled inside the sealing portion 3; and a work-piece bonded to the sealing portion 3 and the portion 4 filled with the adhesive agent. The sealing portion 3 includes: bank portions 31 that protrude from a flat surface of the work-piece S1 on lines surrounding the visual field range W; cutout portions 31a where parts of the bank portions 31 are cut out; first changing portions 32 and second changing portions 33 for changing flowing directions of the adhesive agent flowing from the cutout potions 31a; and extending portions 34 for extending flowing passages of the adhesive agent.

Description

  The present invention relates to, for example, a bonded structure in which a pair of workpieces are bonded via an adhesive and a method for manufacturing the same.

  Generally, a liquid crystal display is a bonding structure formed by laminating a liquid crystal module, a touch panel for operation, a protective panel (cover panel) for protecting the surface, and the like. These liquid crystal modules, touch panels, protective panels, and other members to be stacked (hereinafter referred to as workpieces) are incorporated in a liquid crystal display casing.

  In order to bond such workpieces, there are a method using an adhesive sheet and a method using a resin adhesive. The adhesive sheet is a sheet in which a pressure-sensitive adhesive is applied to both surfaces of a sheet serving as a base, and a release paper is pasted. This adhesive sheet is relatively expensive compared to an adhesive. In using the adhesive sheet, a process such as peeling the release paper in advance is required. For this reason, due to demands for cost reduction in recent years, bonding using an adhesive that is relatively inexpensive and can simplify the process has become mainstream.

  In addition, a work such as a protective panel or a touch panel is laminated so as to overlap with a region of a liquid crystal display surface. In this case, if an air layer enters between the workpieces, the visibility of the display surface decreases due to external light reflection. In order to cope with this, an adhesive layer is formed by filling a gap (gap) between the workpieces with an adhesive when bonding the workpieces. Such an adhesive layer has a function of protecting the workpiece as a spacer between the workpieces.

  Furthermore, in recent years, liquid crystal displays have also become larger due to demands for larger screens. In the case of a large-sized liquid crystal display, since the workpiece | work which comprises this also becomes a large area, it is easy to produce a deformation | transformation. For this reason, the thickness required for the adhesive layer tends to increase in order to absorb the deformation and protect the workpiece. For example, a thickness of several hundred μm has been required.

  Thus, when it is going to ensure thickness, the quantity of a required adhesive agent will increase. Then, when a necessary amount of adhesive is supplied to the workpiece, the adhesive flows and easily protrudes from the workpiece. Therefore, it is conceivable that the resin (resin) used as the adhesive has a high viscosity with little flow. However, even in such a case, unless the process conditions such as the application position of the adhesive are strictly adjusted, the adhesive may protrude from a predetermined region at the time of bonding.

  In order to deal with this, there is a sealing method in which a bank-like seal portion is formed in advance on the outer periphery that defines the application region (see Patent Document 1). For example, as shown in FIG. 19, a seal portion is formed by applying a resin adhesive R <b> 1 to the work S <b> 1 in a frame shape and curing it. Thereafter, an adhesive R2 made of resin is supplied to the inside of the seal portion, and the workpiece S2 is bonded as shown in FIG. In this sealing method, since there is a seal portion on the outer periphery, the seal portion can prevent protrusion due to the flow of the adhesive R2 at the time of bonding.

  In addition, in order to eliminate optical irregular reflection, a substance (functional material) having a refractive index close to the workpiece may be filled between the workpieces. In this case, the material to be filled also has a function as an adhesive for bonding the workpiece.

  There are two types of bonding methods: a method of bonding in air and a method of bonding in vacuum. The method of bonding in the air does not require an exhaust facility and can be realized at low cost. However, in the bonding in the air, it is difficult to obtain process conditions for preventing bubbles from remaining on the bonding surface. The process conditions include, for example, a resin coating pattern when the resin is spread and bonded, a bonding pressure, a method of applying pressure, and the like. On the other hand, in the method of bonding in vacuum, since there is no gas in the surroundings in a sufficiently exhausted environment, bonding with few bubbles can be performed relatively easily.

JP 2010-66711 A JP 2008-209510 A JP 2009-8851 A

  By the way, even if bonding is performed in a vacuum, at an actual production site, it is difficult to spend a sufficient amount of time for exhaustion due to demands such as tact time. Therefore, bonding must be performed in a state where a certain amount of gas remains, and bubbles may remain. An example of such residual bubbles A is shown in FIG. In general, the position where the residual bubbles A are generated is often the inner edge or corner of the seal portion. This is due to the path followed by the adhesive during bonding. That is, when the adhesive spreads during bonding, the bubbles are pushed by the outer edge of the adhesive and reach the inner edge of the seal portion. Therefore, there are bubbles remaining at the inner edge. Further, since the adhesive moves to the corner along the inner edge of the seal portion, many bubbles gather at the corner.

  When the residual bubbles A are generated in the visual field range W of the user in the liquid crystal display shown in FIG. 20, the visibility of the screen may be hindered. For this reason, it is preferable that the residual bubble A shown in FIG. 21 is outside the visual field range W of the user. Further, if the residual bubbles A are within the outer peripheral bezel that forms the outer frame of the display area of the liquid crystal display, for example, no particular problem occurs.

  However, with regard to the visual field range W, it is desired to secure a wide area because of the demand for a larger screen. For this reason, it is necessary to utilize the display area of the display device as widely as possible. That is, it is desirable to reduce as much as possible the portion where the display area is not utilized due to the remaining bubbles and the portion where the remaining bubbles are hidden by the outer frame.

  In order to prevent the bubbles from remaining, a method has been proposed in which a gap is provided in the seal portion in advance, and the resin flows out from the gap at the time of bonding (Patent Documents 2 and 3). However, according to such a method, the resin that has flowed out spills from the work and stains the surroundings. This becomes a problem particularly when a liquid crystal module having a drive circuit substrate provided around the liquid crystal panel is bonded.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and the object thereof is to prevent bubbles from remaining in a predetermined area between workpieces bonded via an adhesive. It is in providing the manufacturing method of a bonding structure and a bonding structure with a high non-defective rate.

In order to achieve the above object, the bonded structure of the present invention has the following technical features.
(1) First workpiece having a flat surface at least partially
(2) A seal portion formed by an adhesive around a predetermined region on the flat surface of the first workpiece.
(3) Adhesive filling part in which the area surrounded by the seal part is filled with adhesive
(4) The second work bonded to the seal part and the adhesive filling part

Further, the seal part has the following technical features.
(5) A bank portion formed on the line surrounding the predetermined region so as to protrude from the flat surface of the first workpiece.
(6) A cutout portion in which a part of the bank portion is missing when viewed from the side of the flat surface of the first workpiece.
(7) The notch portion is formed so as to protrude from the flat surface of the first workpiece at a position facing the notch portion with a space therebetween, and to change the flow direction of the adhesive flowing out from the notch portion. The first conversion unit provided in a direction intersecting the direction from the direction toward the outer edge of the first workpiece
(8) The flow of the adhesive that is formed so as to protrude from the flat surface of the first workpiece at a position facing the end of the first conversion portion with a space, and flows out of the first conversion portion. The second conversion unit provided in a direction intersecting the direction along the outer periphery of the bank so as to change the direction
(9) Continuing from the second conversion part, the first conversion part is formed so as to protrude from the flat surface of the first workpiece and extends the flow path of the adhesive of the second conversion part. Extension part provided in a direction along the outer periphery of the conversion part with a gap

  In another aspect, the gap between the outer periphery of the bank portion and the first conversion portion is narrower than the width of the notch portion viewed from the plane side of the first workpiece. In another aspect, an interval between the first conversion unit and the second conversion unit is narrower than an interval between an outer periphery of the bank portion and the first conversion unit. In another aspect, the distance between the extension part and the first conversion part is narrower than the distance between the outer periphery of the bank part and the first conversion part.

  In another aspect, the bank portion is formed in a rectangular shape when viewed from the plane side of the first workpiece, and the cutout portion is formed at least at a corner of the bank portion. In another aspect, the bank portion is formed in a rectangular shape when viewed from the plane side of the first workpiece, and the cutout portion is formed at least on a side of the bank portion. In another aspect, the notch is formed by removing a part of the bank. Furthermore, the manufacturing method of the above bonding structure is also one of the other aspects.

  In the invention as described above, the adhesive spreads in the bank due to the pressure applied to the adhesive when the second workpiece is bonded to the first workpiece. At this time, bubbles are discharged out of the bank portion by the adhesive reaching the notch portion of the bank portion. In addition, when the adhesive flows out of the notch, the flow direction of the adhesive is converted by the first conversion part and the second conversion part, and stops in the process until it flows into the extension part. It is prevented from flowing out of the first workpiece.

  ADVANTAGE OF THE INVENTION According to this invention, between the workpiece | work bonded through the adhesive agent, there is no residue of a bubble in a predetermined | prescribed area | region, and the manufacturing method of the bonding structure and bonding structure with a high yield rate can be provided. .

The vertical sectional view showing the pasting structure in one embodiment of the present invention. Horizontal sectional view showing the bonding structure of FIG. The perspective view which shows the bank part in the bonding structure of FIG. 1, and a 1st conversion part. An enlarged horizontal sectional view (a) and a vertical sectional view (b) showing a bank portion, a first converting portion, a second converting portion and an extending portion in the bonding structure of FIG. Vertical sectional view showing immediately before bonding of the bonding structure of FIG. Horizontal sectional view which shows expansion of the adhesive agent at the time of bonding of the bonding structure of FIG. Horizontal sectional view showing the state where the flow of adhesive stops at the entrance of the notch Horizontal sectional view showing the state where the flow of adhesive stops at the outlet of the notch Horizontal sectional view showing an aspect in which the adhesive flows out of the notch and the flow direction is changed and stopped in the first conversion part Horizontal sectional view showing a state in which the flow of adhesive stops at the end of the first conversion part Horizontal sectional view showing a state in which the flow of the adhesive stops between the second conversion part and the extension part Vertical sectional view showing an example of a notch Vertical sectional view showing an example of a notch Vertical sectional view showing an aspect before bonding (a) and after bonding (b) in another aspect Vertical sectional view showing an aspect before bonding (a) and after bonding (b) in another aspect A plan view showing the positional relationship between a plurality of linearly applied adhesives and notches Plan view showing an example of the shape of the seal part The expanded horizontal sectional view which shows the bank part, 1st conversion part, 2nd conversion part, and extension part of other embodiment Vertical sectional view showing the process immediately before the pasting of the conventional pasting structure Vertical sectional view showing an example of a conventional bonding structure Horizontal sectional view showing residual bubbles in conventional pasting structure

  Embodiments of the present invention (hereinafter referred to as embodiments) will be specifically described with reference to the drawings. In addition, the seal part, adhesive agent, bubble, etc. in each figure are shown schematically, and do not necessarily correspond to the actual collapse state, flow mode, and the like.

[Constitution]
This embodiment is the bonding structure M which bonded together a pair of workpiece | work S1, S2 via the contact bonding layer B, as shown in FIG. The workpieces S1 and S2 to be bonded are rectangular flat plates having flat surfaces. As the workpieces S1 and S2, for example, a substrate, a module, or the like constituting the display device can be considered.

  As shown in FIG. 2, the adhesive layer B has a seal portion 3 and an adhesive filling portion 4. The seal portion 3 is formed of a resin adhesive around a predetermined region on the flat surface of the workpiece S1. This predetermined area is, for example, a rectangular area that becomes the visual field range W in the case of a display device. The adhesive filling portion 4 is a portion in which a region surrounded by the seal portion 3 is filled with an adhesive made of resin.

  The seal part 3 includes a bank part 31, a first conversion part 32, a second conversion part 33, and an extension part 34. The bank portion 31 is formed on a rectangular line surrounding a predetermined area so as to protrude from the surface of the workpiece S1 with an adhesive.

  The bank portion 31 has a cutout portion 31a. As shown in FIG. 3, the cutout portion 31 a is a portion in which a gap is generated as viewed from the side of the workpiece S <b> 1 due to the lack of a part of the bank portion 31. For example, the notch 31 a is provided at four corners of the bank 31.

  The first conversion portion 32 is formed to protrude from the flat surface of the first workpiece S1 with an adhesive at a position facing the notch portion 31a with a gap. The first converter 32 is provided in a direction intersecting the direction from the notch 31a toward the outer edge of the first workpiece S1 so as to change the flow direction of the adhesive flowing out from the notch 31a.

  The second conversion portion 33 is formed to protrude from the flat surface of the first workpiece S1 by an adhesive at a position facing the end portion of the first conversion portion 32 with a space therebetween. This 2nd conversion part 33 is provided in the direction which cross | intersects the direction along the outer periphery of the bank part 31 so that the flow direction of the adhesive agent which flowed out from the 1st conversion part 32 may be changed.

  The extension part 34 is formed so as to protrude from the flat surface of the first work S <b> 1 by an adhesive continuously from the second conversion part 33. The extension portion 34 is provided in a direction along the outer periphery of the first conversion portion 32 so as to extend the adhesive flow path of the second conversion portion 33.

  4A, the width of the notch 31a is α, the interval between the bank 31 and the first converter 32 is β, and the first workpiece S1 is viewed from the plane direction. An interval between the conversion unit 32 and the second conversion unit 33 is γ, and an interval between the first conversion unit 32 and the extension unit 34 is δ. In the present embodiment, the relationship α> β> γ> δ is established. FIG. 4B is a cross-sectional view taken along the line X-X ′ of FIG.

[Action]
The manufacturing method of the present embodiment as described above will be described. First, the seal portion 3 as described above is formed on the workpiece S1. This formation is performed, for example, by printing an adhesive made of resin so that the above-described seal portion 3 is formed by screen printing using a printing apparatus. For example, an ultraviolet curable resin is used as the adhesive.

  The seal portion 3 is formed so that the heights of the bank portion 31, the first conversion portion 32, the second conversion portion 33, and the extension portion 34 are equal. The printed seal portion 3 is irradiated with ultraviolet rays in the atmosphere by an ultraviolet irradiation device. Since the progress of curing is inhibited by oxygen in the atmosphere, the seal portion 3 is only temporarily cured. Thereby, the flow of the seal part 3 is prevented.

  Next, as shown in FIG. 5, the adhesive R is supplied into the bank portion 31 of the workpiece S1. For example, the ultraviolet curable resin which is the adhesive agent R is dripped from the nozzle of the dispenser with which an adhesive agent supply apparatus is provided.

  Thereafter, the workpiece S2 is bonded to the workpiece S1. For example, in the bonding apparatus, the workpiece S2 is placed on the workpiece S1 on the table and moved while pressing the pressure roller on the workpiece S2. Thereby, the workpiece S2 is pressed against the workpiece S1.

  At this time, as shown in FIG. 6, the bank portion 31, the first conversion portion 32, the second conversion portion 33, and the extension portion 34 are pressed by the work S2, and the adhesive R is also pressed. The adhesive R spreads in the portion 31. When the adhesive R reaches the inner periphery of the bank portion 31, it further flows along the inner periphery and reaches the notch portion 31a.

It is conceivable that the adhesive R that has flowed toward the notch 31a has the following mode.
(1) Stop at the entrance or inside of the notch 31a (see FIG. 7).
In this case, the bubble A is discharged into the notch 31a.
(2) Stop at the exit of the notch 31a (see FIG. 8).
In this case, the bubble A is discharged between the notch 31 a and the first conversion part 32.
(3) It flows out of the notch 31a, and the flow direction is converted into a direction along the bank 31 by the first conversion unit 32 and stops (see FIG. 9).
In this case, the bubbles A are discharged between the first conversion part 32 and the bank part 31.

(4) Stop at the end of the first converter 32 (see FIG. 10).
In this case, the bubbles A are discharged between the end of the first conversion unit 32 and the second conversion unit 33.
(5) It flows out of the first conversion unit 32, the flow direction is converted by the second conversion unit 33, and enters the extension unit 34 and stops (see FIG. 11).
In this case, the bubble A is discharged between the first conversion part 32 and the extension part 34.

  As described above, the filling area is filled with the adhesive R, and the bubbles A are pushed out from the bank portion 31, so that they do not remain in the visual field range W. Actually, which mode (1) to (5) is selected differs depending on the volume in the bank portion 31, the filling amount of the adhesive R, the pressing force by the work S2, and the like. Moreover, even if it is the same workpiece | work S1, it may be the same or different in which aspect (1)-(5) it becomes in the some notch part 31a.

  In this way, the curing process is performed on the seal portion 3 and the adhesive R between the bonded workpieces S1 and S2. For example, ultraviolet rays are irradiated by an ultraviolet irradiation device in a vacuum chamber that has been evacuated. Thereby, as shown in FIG. 1, the bonding structure M which has the contact bonding layer B which the adhesive agent filling part 4 and the seal | sticker part 3 hardened | cured is completed. In addition, as for the completed bonding structure M, the aspect of the adhesive agent R in each notch part 31a may be the same, or may contain a different thing as mentioned above. In the main curing, it is not essential to irradiate ultraviolet rays in a vacuum, and irradiation may be performed in the air. This is because after bonding, there are few portions where the adhesive is in contact with the air, and thus the curing proceeds even in the air.

[effect]
According to the present embodiment as described above, the overflow of the adhesive R outside the workpiece S1 can be prevented, and the bubbles A can be discharged outside the seal portion 3. For this reason, the bonding structure M without the bubble remaining in a filling area | region can be manufactured, and the yield rate improves.

  In particular, the first conversion part 32, the second conversion part 33, and the extension part 34 have a labyrinth structure that changes the flow direction of the adhesive R and extends the flow path in a narrow space. In addition, the width of each flow path has a relationship of α> β> γ> δ as described above. For this reason, the adhesive R has a large resistance to flow and is difficult to flow, and is prevented from overflowing from the workpiece S1. The maze structure also serves as a filling amount adjusting unit that adjusts the filling amount of the adhesive R by discharging the excess adhesive R. For this reason, it is not necessary to strictly adjust the dropping amount of the adhesive R.

  Further, by forming the cutout portion 31a, the first conversion portion 32, the second conversion portion 33, and the extension portion 34, a discharge path for the adhesive and bubbles is secured in advance. For this reason, even if process conditions change, such as a change in viscosity due to deterioration of the adhesive R, a change in the amount of dissolved gas, etc., fluctuations in the flow amount due to these changes, an increase in bubbles A, and the like can be absorbed.

  Furthermore, since the seal part 3 can be formed at a time by printing, it can be manufactured efficiently. For example, the time for forming the seal portion 3 is greatly shortened, and other processes are not restricted by this time. Note that all or part of the bank portion forming step, the first converting portion forming step, the second converting portion forming step, and the extension portion forming step in the claims may be performed collectively or at different timings. Is also included.

[Other Embodiments]
The present invention is not limited to the embodiment as described above. For example, the following forms are also included in the present invention.

(1) The mode of the notch is not limited to the mode in which the bank is completely absent as illustrated in the above embodiment. Any cutout portion may be used as long as the adhesive can flow out from the side of the workpiece. For example, the notch portion may be realized by the height difference of the bank portion. In this case, as shown in FIG. 12, the notch portion 31a may be realized by changing the thickness at which the bank portion 31 is formed (printed, transferred, applied).

  In addition, as shown in FIG. 13, the bank portion 31 is formed without being cut and the second layer is intermittently formed (printing, transferring, applying), thereby forming the cutout portion 31a. It is also possible to form.

(2) The method of forming the notch may be formed intermittently in advance, or may be formed by removing a part from the continuously formed. For example, it is conceivable to form a notch by removing a part of the bank with a removing tool (dropper, spatula, pin, knife, needle, etc.) provided in the removing device. It is also conceivable that the removed portion is sucked by inserting the nozzle connected to the vacuum source to the bank portion.

  It is desirable that the member that comes into contact with the workpiece S1 such as a removing tool is made of a material that does not damage the workpiece S1. For example, it is conceivable to be made of resin or coated with resin. As an example of the resin, for example, PTFE can be considered.

(3) The positions where the notches are formed and the positions and shapes of the first converter, the second converter, and the extension corresponding thereto are not limited to those exemplified in the above embodiment. For example, the first conversion unit, the second conversion unit, and the extension unit may be linear or curved. As a wave shape, resistance may be generated in the flow of the adhesive.

(4) The method for forming the seal portion is not limited to screen printing. For example, the seal portion can be formed by transfer using a plate, laser transfer, or the like. Even in the case of transfer, it is possible to form a seal portion all over the workpiece.

  Alternatively, the seal portion may be formed by applying resin using a dispenser that supplies a resin material or an inkjet head. Thereby, various formation patterns of the seal portion can be appropriately selected and applied. The resin preferably has the same viscosity difference as that of the seal part and the adhesive filling part from the viewpoint of optical characteristics and material contamination, but is not limited thereto.

  The height may be secured by forming the seal part by overlapping a plurality of times (printing, transferring, applying, etc.). In this case, leveling can be suppressed by performing the curing process every time it is formed or every predetermined number of times.

(5) About the height of a bank part, a 1st conversion part, a 2nd conversion part, and an extension part, it is also possible to set it as a different height. If the supply amount of the adhesive is appropriate, even if the first conversion part 32, the second conversion part 33, and the extension part 34 are lower than the bank part 31, as shown in FIG. Does not occur. As shown in FIG. 15, if the first conversion part 32, the second conversion part 33, and the extension part 34 are higher than the bank part 31, a part of the overflow of the adhesive R from the bank part 31 can be prevented. .

(6) The method for supplying the adhesive into the seal portion is not limited to a specific one. For example, as shown in FIG. 16, it is also possible to apply the adhesive R in a plurality of lines using a multiple dispenser. FIG. 16 is an example in which a notch 31 a is provided on the side in addition to or instead of the corner of the bank portion 31. In this case, by adjusting the width and interval of the application line of the adhesive R, it is possible to associate the position where bubbles are easily generated with the notch 31a. For example, it is conceivable to apply the adhesive R so that the notch 31a corresponds to a place where bubbles are easily generated between the application lines of the adhesive R. Thereby, the moving distance until the bubble enters the notch 31a is shortened, and the tact time can be shortened. In addition, since the bubbles gathering at the notches 31a are small, they are likely to disappear.

  In addition, various methods such as a coating method using a roller, a coating method using a squeegee, and a spin coating method can be applied. In addition, as an adhesive agent, the adhesive agent similar to or different from a bank part is applicable.

(7) The type of resin used for the seal part and the adhesive filling part is not limited to the ultraviolet curable resin. Any type of resin such as a resin curable by other electromagnetic waves or a thermosetting resin can be applied. In this case, depending on the type of resin, it is conceivable to apply various curing methods such as electromagnetic wave irradiation, temperature change (heating, cooling), and air blowing. Accordingly, the treatment for pre-curing the seal portion also differs depending on the resin. Note that the temporary curing of the seal portion is not necessarily performed.

(8) The shape of the line formed by the seal portion is not limited. It may be a square, a circle, an ellipse, another polygon, or a curved circle. For example, as shown in FIG. 17, when there is a region Z where the adhesive should not be applied as shown in FIG. 17, the seal portion 3 can be formed so as to avoid this.

  Further, the place where the seal portion is formed by supplying the adhesive is not limited to the line defining the outer periphery of the adhesive supply region. For example, it may be a line that defines the circumferential line of the supply area, such as on a circumferential circle of a circular or donut shaped disk. The inner peripheral line when there is an unfilled region inside is also included.

(9) The position, shape, direction, and the like of the first conversion unit, the second conversion unit, the extension unit, and the like are not limited to the above embodiment. For example, as shown in FIG. 18, even if a part of the first conversion part 32 and a part of the extension part 34 are provided at a position reaching the edge of the workpiece S1, they are formed in a curved shape or at a different angle. By doing so, a maze structure can be formed. Thereby, the space | interval of the bank part 31 and the edge of the workpiece | work S1 can be shortened, and the adhesive filling part 4 can be ensured widely.

(10) The bonding of the workpieces and the resin curing process may be performed in a vacuum or in the air.

(11) The work to be bonded is typically a cover panel, a touch panel and a liquid crystal module, or a display panel and a backlight constituting the liquid crystal module. However, the size, shape, material, etc. of the pair of workpieces to which the present invention is applied are not particularly limited as long as they have a flat surface on at least a part of the bonding surface and can be a pair of bonding targets. Absent. For example, the present invention can be applied to various members constituting a display device, a semiconductor wafer, an optical disc, and the like. The present invention is applicable not only when supplying an adhesive to one of the workpieces but also when supplying the adhesive to both.

DESCRIPTION OF SYMBOLS 1 ... Work 3 ... Seal part 4 ... Adhesive filling part 31 ... Bank part 31a ... Notch part 32 ... 1st conversion part 33 ... 2nd conversion part 34 ... Extension part A ... Bubble M ... Bonding structure R ... Adhesives S1, S2 ... Workpiece W ... View range

Claims (11)

A first workpiece having a flat surface at least in part;
A seal portion formed around a predetermined region on the flat surface of the first workpiece;
An adhesive filling portion in which an adhesive is filled in a region surrounded by the seal portion;
A second workpiece bonded to the seal portion and the adhesive filling portion;
Have
The seal portion is
On the line surrounding the predetermined region, a bank portion formed by protruding from the flat surface of the first work,
A cutout portion lacking a part of the bank portion as viewed from the side of the flat surface of the first workpiece;
The first work piece is formed so as to protrude from the flat surface of the first workpiece at a position facing the notch portion with a gap, and the flow direction of the adhesive flowing out from the notch portion is changed from the notch portion to the first portion. A first converter provided in a direction intersecting the direction toward the outer edge of one workpiece;
It is formed so as to protrude from the flat surface of the first workpiece at a position facing the end of the first conversion part with a gap, and changes the flow direction of the adhesive flowing out from the first conversion part. A second converter provided in a direction intersecting the direction along the outer periphery of the bank,
Continuing from the second conversion part, the first conversion part is formed so as to protrude from the flat surface of the first workpiece, and extends the flow path of the adhesive of the second conversion part. An extension provided in a direction along the outer periphery of the
The bonding structure characterized by having.   The bonding structure according to claim 1, wherein an interval between the outer periphery of the bank portion and the first conversion portion is narrower than a width of the notch portion as viewed from the plane side of the first workpiece. body.   The bonding structure according to claim 1, wherein an interval between the first conversion unit and the second conversion unit is narrower than an interval between an outer periphery of the bank unit and the first conversion unit. body.   The bonding structure according to claim 1, wherein a distance between the extension part and the first conversion part is narrower than a distance between the first conversion part and the second conversion part. The bank portion is formed in a rectangular shape when viewed from the plane side of the first workpiece,
The bonding structure according to claim 1, wherein the notch is formed at least at a corner of the bank. The bank portion is formed in a rectangular shape when viewed from the plane side of the first workpiece,
The bonding structure according to claim 1, wherein the cutout portion is formed at least on a side of the bank portion.   The bonding structure according to claim 1, wherein the cutout portion is formed by removing a part of the bank portion. A seal portion forming step of forming a seal portion with an adhesive around a predetermined region on the flat surface of the first workpiece;
An adhesive supply step of supplying an adhesive to the predetermined region;
A bonding step of bonding a second workpiece to the seal portion and the adhesive;
Including
The sealing part forming step includes
A bank part forming step for forming a bank part on the line surrounding the predetermined region so that a notch part partially missing when viewed from the side of the flat surface of the first workpiece is formed;
In order to change the flow direction of the adhesive that protrudes from the flat surface of the first workpiece and flows out of the notch at a position facing the notch with a space therebetween, the first workpiece from the notch is changed. A first conversion part forming step of forming the first conversion part in a direction intersecting the direction toward the outer edge of
In order to change the flow direction of the adhesive that protrudes from the flat surface of the first workpiece and flows out from the first conversion portion, at a position facing the end portion of the first conversion portion with a space therebetween. A second conversion part forming step of forming a second conversion part in a direction intersecting the direction along the outer periphery of the bank part;
Continuing from the second conversion part, it is raised from the flat surface of the first workpiece, and on the outer periphery of the first conversion part to extend the flow path of the adhesive of the second conversion part. An extension portion forming step for forming an extension portion in a direction along the interval;
It is characterized by including The bank portion forming step includes
The manufacturing method of the bonding structure of Claim 8 including the process of forming a notch part by supplying the said adhesive agent in the shape of the intermittent line. The bank portion forming step includes
The manufacturing method of the bonding structure of Claim 8 including the process of forming a notch by supplying the said adhesive agent in the continuous linear form from which height differs. The bank portion forming step includes
Supplying the adhesive in a continuous line;
A step of forming a notch by removing a part of the linear adhesive;
The manufacturing method of the bonding structure of Claim 8 characterized by the above-mentioned.

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