JPH10339626A - Press-contact state inspection method for anisotropic conductive sheet, and press-contact device for anisotropic conductive sheet using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-contact state inspection method for an anisotropic conductive sheet wherein a press-contact length of the anisotropic conductive sheet and a dislocation in object setting position are accurately inspected. SOLUTION: A position coordinate of corner parts 20a and 30b on both end sides of an anisotropic conductive sheet 20 to an object 19 is detected. When corner parts 20a and 30b are both detected, presence of accurately press- contacted anisotropic conductive sheet 20 is discriminated. The press-contact length of the anisotropic conductive sheet 20 calculated based on the position coordinate of the detected two corner parts 20a and 30b is compared to a length tolerance value for discrimination of correctness in length. The press-contact position and press-contact angle of the anisotropic conductive sheet 20 against the object 19 calculated based on the two position coordinates are compared to respective tolerance value, for discriminating correctness in press-contact position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anisotropic conductive sheet attached to an object by cutting the anisotropic conductive sheet to a predetermined length and then pressing the sheet by pressing means. The present invention relates to a method for inspecting the crimping state of a crimping device and a crimping apparatus using the method.

[0002]

2. Description of the Related Art For example, in a process of manufacturing a liquid crystal panel, an anisotropic conductive sheet (An
An isotropic Conductive Film (hereinafter, referred to as ACF) is attached by crimping means, and electronic components are arranged on the ACF, and heat and pressure are applied thereto, thereby electrically connecting the electronic components with conductive particles contained in the ACF. ACF mounting method is used. In recent years, this ACF mounting method
It is applied not only to liquid crystal packaging but also to semiconductor packaging. As a crimping device for crimping an ACF to an object in this ACF mounting method, a device described in Japanese Patent Application Laid-Open No. 7-270742 is known, and this crimping device will be described below.

[0003] That is, a tape-like body having an ACF carried on a base tape is mounted on a crimping device so as to be unwound from a supply reel and wound on a take-up reel.
In addition, a part existing between the supply reel and the take-up reel is stretched below a pressure head which is a pressure means. After this tape-shaped body is gripped by the feed chuck and pulled out by the length to be pressed against the object,
A cut is made only in the ACF by the cutter, and the sheet is transferred to a predetermined pressure bonding position below the pressure head by the feed chuck, and is held in a stretched state.

On the other hand, an object on which electronic components are mounted by the ACF, for example, a liquid crystal panel, is sucked and held by a holding stage, transferred to a position facing a position recognition camera by an XY robot, and provided at a predetermined position. When the mark is recognized by the camera, the position of the liquid crystal panel is detected. Thereafter, the liquid crystal panel is transferred by the XY robot while being position-corrected based on the recognition of the camera, and is positioned and stopped at the pressure bonding position. Subsequently, the pressure head is lowered to apply heat while pressing the tape-shaped body to a predetermined portion of the liquid crystal panel, so that only the cut ACF is pressed against the liquid crystal panel. The base tape from which the ACF has been peeled off is wound up on a take-up reel.

[0005]

The ACF is,
When heat and pressure are applied by the pressurizing head in the stretched state, it tends to expand, and it is difficult to accurately press it at a predetermined position on an object such as a liquid crystal panel at a predetermined length, which results in poor crimping. easy. In addition, since the ACF has a small optimal range of heat and pressure setting conditions for securely pressing the object, it may be difficult to adhere to the object depending on the object. If the electronic component is mounted in a state where the ACF is not crimped, the electronic component falls from the object and becomes defective, or the dropped electronic component is attached to dust and is not electrically connected. Cause secondary failure. Therefore, the liquid crystal panel that has undergone the ACF pressing step is inspected by a sensor to determine whether or not the ACF is pressed at a predetermined position.

However, the above-mentioned inspection by the sensor merely detects whether or not the ACF is crimped to a predetermined position, and determines whether or not the ACF is cut to an accurate set length. Or, it cannot be determined whether or not the object is accurately crimped to the set position.
Even if a part of ACF is pasted up
This cannot be detected. Therefore, when the space for mounting the component on the object is small, or when a plurality of components are mounted at small intervals, it is necessary to crimp the ACF with high dimensional accuracy and positional accuracy. Since the length of the ACF and the crimping position with respect to the object cannot be determined, the reliability of mounting is reduced.
Further, even if the crimping failure has occurred due to the normal operation of the ACF feed mechanism, there is no means for detecting the crimping failure. Poor crimping may occur one after another, and there is a problem that it takes time to adjust the crimping device and restore to a required state.

[0007] Also, since ACF has adhesiveness,
When the ACF crimping device is operated for a long period of time, it is necessary to clean the cutter for cutting the ACF and the feed chuck for gripping and pulling out the ACF as necessary. Cleaning is performed every time. However,
The timing at which the above-described cleaning is required varies depending on the type of ACF, the length of the ACF compression, and the like. If the cleaning timing is set based only on the number of times of the compression, the ACF that has not been cut accurately is pulled out and pressed against the object. Such troubles occur. Moreover, A
Since CF is a tape-shaped continuous body, the part behind the incompletely cut part in ACF is also peeled off from the base tape during crimping, and once crimping error occurs, this crimping error occurs continuously. Very likely to do so. In this case, there is an inconvenience that the ACF sends out many products having poor pressure bonding to the next process.

Accordingly, an object of the present invention is to provide a crimping state inspection method for an ACF and a crimping apparatus using the same, which can accurately inspect the crimping length of the ACF and a displacement of the object with respect to a set position. Is what you do.

[0009]

In order to achieve the above object, the present invention provides a method for inspecting a crimped state of a strip-shaped anisotropic conductive sheet cut to a predetermined length and crimped on an object. A corner position detection step of detecting the position coordinates of each corner on both ends of the anisotropic conductive sheet with respect to the object, and whether or not two corners are both detected in the corner position detection step. The presence / absence determination inspection step of determining the presence or absence of accurate pressure bonding of the anisotropic conductive sheet, and the pressure bonding length of the anisotropic conductive sheet calculated based on the position coordinates of the two corners detected in the corner position detection step Is compared with the allowable length value to determine the pass / fail, and the crimping position and crimping angle of the anisotropic conductive sheet with respect to the object calculated based on the two position coordinates are compared with the respective allowable values. Good or not And a position checking step of determining.

In this method for inspecting the pressure-bonded state of the anisotropic conductive sheet, the position coordinates of the corners at both ends of the anisotropic conductive sheet with respect to the object are detected. It is possible to accurately detect whether or not the other end is crimped cleanly. Further, since the length of the anisotropic conductive sheet that has been pressed can be accurately detected based on the position coordinates, it is possible to reliably detect the presence or absence of a pressing failure such as turning of the anisotropic conductive sheet. Moreover, not only is it necessary to check whether the anisotropic conductive sheet is properly pressed with the correct length, but also whether the anisotropic conductive sheet is correctly applied with a deviation within the allowable range with respect to the setting position of the object that is originally most important. A position check can be performed. Therefore, even when the space for mounting the component on the target object is small or when a plurality of components are mounted at small intervals, it is inspected whether the anisotropic conductive sheet is crimped with high dimensional accuracy and high positional accuracy. By adjusting the crimping device based on the inspection result, highly reliable mounting can be performed.

[0011] In the above invention, the position inspection step includes a step of comparing a displacement of the anisotropic conductive sheet with respect to the object in the longitudinal direction with an allowable value of a longitudinal displacement. Comparing the displacement of the anisotropic conductive sheet with respect to the object in the rotational direction of the anisotropic conductive sheet with the allowable value of the angular displacement. Is preferred.

[0012] This makes it possible to inspect the displacement of the anisotropic conductive sheet with respect to the object extremely accurately, and to accurately grasp the abnormal state of pressure contact of the anisotropic conductive sheet. In addition to shortening, it is possible to prevent the occurrence of poor crimping.

On the other hand, the pressure-bonding apparatus for anisotropically conductive sheets according to the present invention comprises a sheet feeding means for intermittently transporting the anisotropically conductive sheets by a predetermined length; Cutting means for cutting the anisotropic conductive sheet; pressing means for pressing the cut anisotropic conductive sheet against the object by applying pressure and heat; and each corner and the object on both ends of the anisotropic conductive sheet Detecting means, a transfer means for transferring the anisotropic conductive sheet to a position opposed to each of the pressing means and the detecting means, and a control unit for controlling the entire apparatus, the control unit, By performing signal processing based on the input signal from the detecting means, the corner position detection, the presence / absence determination inspection of the anisotropic conductive sheet, the anisotropic conductive sheet Inspection of the sheet length and the And executes a location check each with respect to the object of sexual conductive sheet, wherein when it is determined that the abnormality in any of the test, has a structure having a function of stopping the driving of the device.

This pressure-bonding apparatus for anisotropic conductive sheets can accurately detect pressure-bonding defects of anisotropic conductive sheets,
Since the drive of the apparatus is stopped when any abnormality is found by the inspection, it is possible to prevent continuation of crimping failure, and to prevent an object whose crimping failure of the anisotropic conductive sheet is sent to the next step.

In the above invention, the control section determines whether or not it is necessary to clean the cutting means on the basis of the result of the corner position detection. It is preferable to have a function to instruct to perform the following.

Thus, the dirt or deterioration of the cutting means is automatically detected from the shape of the cut corners of the anisotropic conductive sheet, and each time the dirt or the like is generated on the cutting means, the cutting is performed. It is possible to clean the means at the most suitable timing, and it is possible to prevent the occurrence of continuous pressure failure of the anisotropic conductive sheet as a continuous body.
Moreover, the cutting means does not need to be regularly and frequently inspected.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an internal structure of an ACF crimping apparatus according to one embodiment of the present invention. In FIG. 1, a pressurizing head 1 serving as a pressurizing means for applying heat and pressure to the ACF to press the ACF to an object is installed at the upper central portion of the apparatus so as to be able to move up and down. On one side of the head 1, a supply reel 3 serving as a supply unit for the tape-shaped body 2, and on the other side, a take-up reel 7 for winding up the base tape 4 after the ACF on the tape-shaped body 2 is peeled off. Are arranged respectively.

The tape-like body 2 of this embodiment has a two-layer structure in which the base tape 4 carries an ACF.
It is intermittently transferred from the supply reel 3 via a plurality of guide rollers 8 and 9 by a well-known tape feeding means, and is taken up on a take-up reel 7. The tape-shaped body 2 is guided between a pair of guide rollers 9 provided on both sides of the pressure head 1, and is stretched under the pressure head 1. In addition, a feed chuck 10 is provided below the pressurizing head 1 as a tape feeding unit that grips the tape-shaped body 2 and pulls it out by a set length.

An object (not shown) for mounting an electronic component by pressing the ACF is adsorbed and held on a holding stage 11, and is moved by an XY robot 12 as a moving means in the X and Y directions. Moved to position. Here, the target object is sucked and held on the holding stage 11 in a state where a specific portion to which the ACF is to be pressed is projected toward the pressure head 1,
The XY robot 12 transfers the specific portion and places it on the bonding stage 13 below the pressure head 1. A cutter 18 that cuts the ACF of the tape-like body 2 in the stretched state is provided on a side portion of the bonding stage 13.

A camera 14 as a detecting means recognizes whether or not the object is correctly positioned on the bonding stage 13. In this embodiment, a belt-like ACF in which the existing camera 14 is crimped to an object in a conventional apparatus is used.
Are also used as detecting means for recognizing two corners on the diagonal line of.

A control unit 17 composed of a console panel or the like
Controls the operation of each of the above-described mechanisms based on an input operation for performing a required operation, and edits and outputs data. Note that, in this embodiment, a case where at least a specific portion of the target object is transparent is illustrated.
It is designed to see through the CF and recognize it.

FIG. 2 shows a liquid crystal panel 19 which is an object on which components are to be mounted, and an ACF 20 is crimped to a predetermined portion of a display frame 19b surrounding the liquid crystal display portion 19a. Here, the ACF 21 shown by a two-dot chain line is virtually shown as a reference one assuming that a correct length is crimped to a set correct position. The liquid crystal panel 19 is provided with position detection marks 22 and 23 at predetermined positions on both sides of a place where the ACF 20 is to be pressed. In this embodiment, after two corners on the diagonal of the crimped ACF 20 are imaged by the camera 14 and image recognition is performed, the length and crimping position of the ACF 20 are determined based on the position coordinates of the two corners. The calculation is performed by the control unit 17.

Therefore, the length between the two corners 20a and 20b on the diagonal line of the crimped ACF 20 is L, the length between the two corners 21a and 21b on the diagonal line of the assumed reference ACF 21 is Lr, and the left side is Lr. two corners 20a ACF 20 of when the position detection mark 22 and a reference point of each of the 20b position coordinates (X _1, Y _1), a (X _2, Y _2), the left side of the position detection mark 22 The position coordinates of the two corners 21a and 21b of the reference ACF 21 when set as the base point are respectively expressed by (Xr
_1, Yr ₁ ), (Xr _2, Yr ₂ ), the distance in the X and Y directions from the left position detection mark 22 to the center position S of the ACF 20 are X _0, Y ₀ , and the left position detection mark, respectively. Xr, Yr, and ACF2 in the X and Y directions from the center 22 to the center position Sr of the reference ACF 20.
0 in the rotational direction relative to the reference ACF 21 is D
v, the respective deviations of the center positions S, Sr of the ACF 20 and the reference ACF 21 in the X and Y directions are represented by D, respectively.
x, Dy (not shown). Although not shown, the difference between the lengths of the ACF 20 and the reference ACF 21 is referred to as DI.

Next, the overall operation of the ACF crimping apparatus will be described with reference to the flowchart of FIG. Here, the liquid crystal panel 19 illustrated in FIG. 2 will be described as an object on which components are mounted. First, the holding stage 11 is moved toward the panel receiving position by the XY robot 12, and the liquid crystal panel 19 is sucked and held on the holding stage 11 stopped at the panel receiving position (step S1). The delivery of the liquid crystal panel 19 to the holding stage 11 is performed manually by a robot or an operator (not shown). Next, the holding stage 11 is moved toward the camera 14 by the XY robot 12, and the two position detection marks 22 and 23 of the liquid crystal panel 19 are imaged by the camera 14. The position of the liquid crystal panel 19 is detected by the recognition processing (step S2). In this case, the liquid crystal panel 19 is positioned so that the mark 23 on the right side thereof is directly above the camera 14, and after the mark 23 is image-recognized,
The liquid crystal panel 19 is positioned so that the mark 22 on the left side thereof is opposed directly above the camera 14, and the mark 22 is image-recognized.

Subsequently, the holding stage 11 is moved toward the bonding stage 13 by the XY robot 12, and the position where the liquid crystal panel 19 is to be mounted is positioned at a predetermined crimping position on the bonding stage 13 (step S3). The positioning of the liquid crystal panel 19 is performed by the control unit 17 controlling the XY robot 12 while correcting based on the position of the liquid crystal panel 19 detected by recognizing the two marks 22 and 23. This liquid crystal panel 1
In parallel with the positioning of 9, after the tape-shaped body 2 is gripped by the feed chuck 10 and pulled out by a predetermined length, a cut is made at a predetermined length position of only the ACF 20 by the cutter 18. Cut AC
F20 is pulled out again by the feed chuck 10 and transferred to the pressure bonding position immediately below the pressure head 1 (step S4).

Thereafter, the pressure head 1 descends to press the tape-shaped body 2 against the liquid crystal panel 19 by applying pressure, and also applies heat to press the ACF 20 onto the liquid crystal panel 19 (step S5). When the compression of the ACF 20 is completed, the holding stage 11 is moved by the XY robot 12, and the liquid crystal panel 19 is transferred to a position above the camera 14 again. The units 20a and 20b are imaged by the camera 14, and the image signals are input to the control unit 17. The control unit 17 controls the two corners 20 by image recognition processing.
a, 20b position coordinates (X _1, Y _1), to detect the (X _2, Y ₂₎ (step S6). Here, the camera 14 captures an image of only a preset range on the liquid crystal panel 19,
The control unit 17 determines whether or not the ACF 20 is crimped within a preset range based on whether or not the image signals of the two corners 20a and 20b are both input (step S7).

The control unit 17 has one of the corners 20a
Or, if the image recognition of 20b failed, ACF2
It is determined that 0 is not correctly adhered, and control is performed to clean the cutter 28 (step S15).
This is because when the ACF 20 is not accurately cut due to the dirt on the cutter 18 or the like, the sharp corners 20
a and 20b cannot be obtained, so the corner 2 of the ACF 20
This is because images 0a and 20b cannot be recognized. As described above, since the dirt on the cutter 18 is automatically detected from the shapes of the cut corners 20a and 20b of the ACF 20, the cutter 18 is cleaned at the most suitable timing every time the dirt is generated on the cutter 18. And the cutter 18 does not need to be regularly and frequently inspected.

Further, the control unit 17 instructs cleaning of the cutter 18, displays an inspection error on the console panel (step S16), and then stops the driving of the apparatus by error (step S17). Thereby,
It is possible to prevent a continuous failure of the ACF 20 that is a continuous body from occurring continuously, prevent the liquid crystal panel 19 that has a poor crimp of the ACF 20 from being sent to the next process, and reduce the crimp failure of the ACF 20. When this occurs, it can be confirmed by an abnormal display, and the adjustment time for restoring the crimping device can be shortened.

In the inspection of the presence or absence of the ACF 20 in step S7, if the two corners 20a and 20b are both image-recognized, the crimped ACF 20 and the reference ACF 21
Is calculated (step S8). That is, the control unit 17 controls the two corners 20a,
20b position coordinates (X _1, Y _1), calculates the length L between (X _2, Y ₂₎ on the basis of corners 20a, 20b. This length L
Is calculated by calculating equation (1). Further, the control unit 17 calculates the two corners 21a and 21b of the reference AFC 21 which are theoretical values by calculating the expression (2).
The length Lr between them is calculated, and the calculated two types of lengths L, L
By calculating equation (3) based on r, A
The length deviation DI between the CF 20 and the reference ACF 21 is calculated.

[0030]

(Equation 1)

[0031]

(Equation 2)

[0032]

(Equation 3)

After calculating the length deviation DI, the control unit 17 compares the deviation DI with a preset length allowable value KI, and determines whether the ACF 20 has been correctly pasted with a predetermined length. It is determined whether or not there is (step S9). In other words, the control unit 17 determines that the shift DI is normal when the shift DI is smaller than the allowable length value KI, and determines that the length is abnormal when the shift DI is larger than the allowable length value KI (step S16), and displays an inspection error (step S16). The driving is stopped by an error (step S17). As described above, by detecting the two corners 20a and 20b of the ACF 20 and performing the length inspection, it can be accurately inspected whether the ACF 20 is stuck from one end to the other end accurately, and the length of the ACF 20 can be accurately determined. Can be determined accurately. Further, by performing the length inspection of the ACF 20, the A
It is also possible to inspect whether or not there is a turn when the CF 20 is crimped.

If the length check is normal, the control unit 17
Various displacements D of the ACF 20 with respect to the liquid crystal panel 19
x, Dy, and Dv are calculated (step S10). ACF
The X-direction displacement Dx with respect to the 20 reference ACFs 21 is calculated by calculating equation (4), and the Y-direction displacement Dy is calculated by calculating equation (5).
20 in the rotational direction relative to the reference ACF 21 Dv
Is calculated by calculating equation (6).

[0035]

(Equation 4)

[0036]

(Equation 5)

[0037]

(Equation 6)

Next, the control unit 17 compares the calculated position deviation Dx in the X direction with a predetermined ACF longitudinal direction allowable value Kx, and determines that the ACF 20 has a small position deviation within the allowable value in the X direction. It is determined whether or not crimping is performed (step S11). That is, the control unit 17 determines that the X-direction displacement Dx is smaller than the ACF longitudinal direction allowable value Kx when it is normal, and when it is larger, determines that the X-direction crimping position is abnormal and displays an inspection abnormality. (Step S
16), driving of the apparatus is stopped by error (step S1)
7).

Further, the control unit 17 compares the calculated Y-direction positional deviation Dy with a preset ACF longitudinal direction allowable value Ky, and presses the ACF 20 with a small positional deviation within the allowable value in the Y-direction. It is determined whether or not it has been performed (step S12). In other words, the control unit 17 determines that the Y direction misalignment Dy is normal when it is smaller than the ACF lateral direction allowable value Ky, and determines that the Y direction crimping position is abnormal when the Y direction misalignment Dy is larger than the ACF short direction allowable value Ky. Display (Step S
16), driving of the apparatus is stopped by error (step S1)
7).

Subsequently, the control unit 17 compares the calculated position deviation Dv in the rotation direction with the preset ACF rotation direction allowable value Kv, and determines that the ACF 20 has a small position deviation within the allowable value Kv in the rotation direction. It is determined whether or not the pressure is applied (step S13).

That is, the control unit 17 determines that the rotational direction displacement Dv is smaller than the ACF rotational direction allowable value Kv and determines that it is normal. An error is displayed (step S1
6) Stop the driving of the apparatus by error (step S1)
7).

The various displacements Dx, Ax
Dy and Dv are position detection marks 22 of the liquid crystal panel 19.
Two corners 20a of the ACF 20 which is a base point, 20b position coordinates (X _1, Y _1), from (X _2, Y ₂₎ is calculated based on, ACF 20 is neatly crimped at the correct length In addition to an inspection as to whether or not the liquid crystal panel 19 is originally most important, a position inspection as to whether or not the liquid crystal panel 19 is accurately attached can be performed.

If the results of the various tests described above are all normal, it is determined whether or not the crimping of a predetermined number of ACFs 20 has been completed (step S14). If not, the process proceeds to step S3. Return to the LCD panel 19
Move the next crimping position to the crimping position
This is repeated for the number of CF20 press-bonded sheets. When the crimping of all the ACFs 20 is completed, the liquid crystal panel 19 whose production has been completed is moved to the carry-out position and sent to the next process (step S).
18).

Note that steps S7, S9,
It is not necessary to perform all of the five types of inspection steps shown in S11 to S13, and they may be appropriately selected and combined as needed. Further, the two corners 20a and 20b for detecting the ACF 20 are optional depending on the purpose of use of the inspection, but it is preferable to select two on the diagonal line as in the above embodiment. Further, the processing of steps S3 to S6 in FIG. 3 is repeated by the number of ACFs 20 to be crimped to finish the crimping of all the ACFs 20 first, and the two corners 20a, 20a of the ACFF 20 detected each time the crimping is performed.
b position coordinates (X _1, Y _1), it may be repeated only the number of ACF20 was crimped (X _2, Y ₂₎ may be stored, and the inspection process of step S7~ step S13.

In this embodiment, an existing camera 14 provided to improve the positioning accuracy of the ACF 20 is used.
Is also used for the inspection of the crimping state of the ACF 20, and the sensor 5 shown by a two-dot chain line in FIG. And cost can be reduced.

[0046]

As described above, according to the method for inspecting the pressure-bonded state of the anisotropic conductive sheet of the present invention, the position coordinates of the corners at both ends of the anisotropic conductive sheet with respect to the object are detected. It is possible to accurately detect whether or not the anisotropic conductive sheet is securely pressed from one end to the other end, and it is possible to accurately detect the length of the anisotropic conductive sheet that is being pressed. In addition, by inspecting the accurately detected length of the anisotropic conductive sheet, it is possible to reliably detect the presence or absence of a press-fit defect such as turning of the anisotropic conductive sheet.

In addition, it is possible to perform a position inspection on whether or not the anisotropic conductive sheet is accurately adhered to the set position of the object, which is originally most important, with a deviation within an allowable range.
Therefore, even when the space for mounting the component on the target object is small or when a plurality of components are mounted at small intervals, it is inspected whether the anisotropic conductive sheet is crimped with high dimensional accuracy and high positional accuracy. By adjusting the crimping device based on the inspection result, highly reliable mounting can be performed.

Further, according to the anisotropic conductive sheet crimping apparatus of the present invention, it is possible to accurately detect a defective bonding of the anisotropic conductive sheet and to stop driving the apparatus when any abnormality is found by the inspection. Therefore, it is possible to prevent the occurrence of poor crimping in advance, and it is possible to surely prevent the target object of the anisotropic conductive sheet from having poor crimping from being sent to the next step.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an internal structure of a pressure bonding apparatus for an anisotropic conductive sheet according to an embodiment of the present invention.

FIG. 2 is a plan view showing an object on which an anisotropic conductive sheet is pressed.

FIG. 3 is a flowchart showing signal processing of the method for inspecting the pressure-bonded state of an anisotropic conductive sheet according to one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 pressure head (pressure means) 10 feed chuck (sheet transfer means) 12 XY robot (transport means) 14 camera (detection means) 17 control unit 18 cutter (cut means) 19 liquid crystal panel (object) 20 anisotropy Conductive sheet 20a, 20b Corner of anisotropic conductive sheet

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayuki Ida 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A method for inspecting a crimped state of a band-shaped anisotropic conductive sheet cut to a predetermined length and crimped on an object, comprising: A corner position detecting step of detecting position coordinates with respect to the object; and determining whether or not the pressure-bonding of the anisotropic conductive sheet is accurate based on whether or not two corners are both detected in the corner position detecting step. The presence / absence determination inspection step, and a length for comparing the pressure bonding length of the anisotropic conductive sheet calculated based on the position coordinates of the two corners detected in the corner position detection step with a length allowable value to determine pass / fail. An inspection step, and a position inspection step of judging pass / fail of the anisotropic conductive sheet with respect to the object calculated based on the two position coordinates and comparing each of the crimping positions and the crimping angles with each allowable value. Conductive sheet Crimping state inspection method. 2. The method according to claim 1, wherein the step of comparing the position of the anisotropic conductive sheet with respect to the object in the longitudinal direction is compared with an allowable value of the positional deviation in the longitudinal direction of the anisotropic conductive sheet. And a step of comparing the positional deviation of the anisotropic conductive sheet with respect to the object in the rotational direction with the allowable value of the angular positional deviation. 2. The method for inspecting the pressure-bonded state of an anisotropic conductive sheet according to 1. 3. A sheet feeding means for intermittently transporting an anisotropic conductive sheet by a predetermined length; a cutting means for cutting said anisotropic conductive sheet to a predetermined length; Pressing means for applying pressure and heat to the object by applying pressure and heat to the anisotropic conductive sheet; detecting means for detecting each corner and the object at both ends of the anisotropic conductive sheet; A transfer unit that transfers the pressure unit and the detection unit to respective opposing positions; and a control unit that controls the entire apparatus. The control unit performs signal processing based on an input signal from the detection unit. 2. The method of claim 1, further comprising the steps of: detecting a corner position; determining whether or not the anisotropic conductive sheet is present; inspecting the length of the anisotropic conductive sheet; Position detection for the sheet object An anisotropic conductive sheet crimping device having a function of performing inspections and stopping the operation of the device when it is determined that any of the inspections is abnormal. 4. The control section determines whether or not it is necessary to clean the cutting means based on the result of the corner position detection, and cleans the cutting means when it is determined that the cleaning is necessary. The pressure bonding apparatus for an anisotropic conductive sheet according to claim 3, further comprising a function of giving an instruction.