JPH0336144A - Linear sheet auto-inspection device - Google Patents

Abstract

PURPOSE:To stop a linear sheet, which is intermittently transferred, at an accurate position with simplicity by providing a control means to control transfer through a transferring means so that when the linear sheet is stopped beyond a preset stop position the next transfer distance can be shortened the first minute distance in accordance with signals from a stop position detecting means. CONSTITUTION:When a transferring means starts transfer, the stop position of a linear sheet 3 stopped after transferred is detected by a stop position detecting means 23, which sends to a control means 92 signals corresponding to a preset stop position whether it is beyond or not. Next, the control means 92 allows the transfer distance for the next transfer operation through the transferring means 91 to be shortened the first minute distance or lengthened the second minute distance in accordance with the signals. In this way, similar operation is done each time after the next transfer, to restrain the dislocation of the stop position of the linear sheet 3 within a minute range from a preset stop position all times.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic inspection device for a strip, and in particular, the present invention relates to an automatic inspection device for a strip, and in particular, a strip that is constructed by connecting a plurality of frames to be inspected, and detects defects in each frame. The present invention relates to an automatic belt-shaped body inspection device suitable for inspecting whether or not the present invention is carried out.

[Conventional technology]

TAB (Tape Automated B.

The nding method is known as one of the IC chip mounting techniques, and is widely used because of its high processing accuracy and ability to perform bulk bonding. The TAB tape (also called "film carrier tape") used in this TAB method is a film made of polyimide, for example, on which copper leads are formed for bonding an IC, and one IC is bonded. One frame is wound around a reel in a large number of consecutive frames, like the frames of a movie film.

Before actually bonding ICs to this TAB tape, it is necessary to inspect it for defects such as damage or missing copper leads. Such inspection is performed using image recognition techniques such as pattern masoching on each frame or every few frames as the TAB tape is transported from the supply reel to the take-up reel (e.g., TAB Film Carrier Lead Inspection System, MV -5100, manufactured by Toshi Co., Ltd.).

There are sprocket holes on both edges of the TAB tape similar to those on movie film, but this is because the TAB tape has I
This sprocket hole is used at the stage of mounting TAB tape, and it is not preferable to use this sprocket hole at the stage of inspection because there is a risk of damaging the TAB tape. For this reason, T
The AB tape inspection device pinches the TAB tape between upper and lower pinch rolls, and transports the TAB tape by rotationally driving the pinch rolls. This pinch roll is equipped with a pulse generator, and by countering the pulses emitted in proportion to the rotation of the pinch roll, TAB
Read the tape transport distance.

[Problem to be solved by the invention]

However, pinch rolls are TAB tape (band-shaped material)
Since the pinch roll and TAB tape do not fit together, there is a risk that the pinch roll and TAB tape may slip.

This pulse generator output and TA
The actual stop position of the B tape will no longer match, and if these errors accumulate, accurate inspection will no longer be possible.

The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide an automatic belt-shaped body inspection device that stops the belt-shaped body at an accurate position.

[Means to solve the problem]

A first invention which is a distant relative of the above-mentioned object is to transport a strip-shaped body having a sprocket hole at the end and consisting of a plurality of consecutive frames to be inspected by a distance corresponding to a predetermined number of frames. In an automatic belt-shaped object inspection device, which has a transport means that stops after the belt-like object is conveyed, and which inspects the presence or absence of coral on each frame while the belt-like object is being conveyed, stop position detection means for detecting whether or not the belt-shaped object after being transported has stopped beyond a predetermined stop position by using an edge located in the transport direction; and based on a signal from the stop position detection means, When the strip body stops beyond the predetermined stop position, the next transport distance is shortened by a first minute distance, and when the strip body stops before reaching the predetermined stop position, the next transport distance is shortened. Second
The present invention is characterized by further comprising a control means for controlling the transfer of the transfer means so as to increase the distance by a minute distance.

A second invention which is distantly related to the above-mentioned object is to provide an automatic inspection device for a strip according to the first invention, further comprising an end detection means for detecting the end of the strip. When the terminal end of the strip is detected, the control means is configured to control the transport means so that the distance of transport of the strip becomes a predetermined distance.

[Effect]

In the first invention, with the above-described configuration, when the transfer means starts transferring, the stop position of the belt-shaped body stopped after being transferred is detected by the stop position detection means, and the stop position detection means is set at a predetermined position relative to the control means. A signal corresponding to whether or not the stop position has been exceeded is sent. Based on this signal, the control means shortens the transfer distance of the next transfer operation by the transfer means by a first minute distance or increases it by a second minute distance. From now on, the same operation will be performed every time after the next transfer.
The deviation of the stop position of the strip is always suppressed within a minute range from the predetermined stop position.

The second invention has the above-mentioned configuration, and in addition to the same effect as the first invention, when the end detection means detects the end of the strip, the control means controls the transport means to set the transport distance of the strip. Set the transfer distance to . This predetermined transfer distance is
For example, it can be the first transport distance or P: the last transport distance before end detection. As a result, if a sprocket hole is not formed at the end of the strip, the control based on the signal from the stop position detection means is eliminated, and the strip near the end is moved a predetermined distance.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 4 is a basic configuration diagram of a TAB tape inspection apparatus which is an embodiment of the present invention.

In FIG. 4, this apparatus has a supply reel 1 that supplies a TAB tape (band-shaped body) 3, and a take-up reel 11 that winds up the TAB tape 3. Supply reel 1 and take-up reel 1
1, a position detection device (position detection means) 21, an automatic inspection section 31, a verification section 41, a visual inspection section 51, a puncher 61, an operation section 71, a splicer 81, etc. are provided. Further, on the downstream side of the TAB tape conveying stage of the splicer 81, there is provided a vinyl roll 91 for conveying the TAB tape. This pinch roll 91 is configured to be controlled by a control section 92 based on a signal from the position detection device 21.

The supply reel 1 on which the TAB tape 3 is wound has a T
An interleaver 5, which serves as a protective film to prevent damage caused by contact between the AE tapes, is also wound at the same time. The reel 7 is for winding the interleaver 5 separately from the TAB tape 3. On the other hand, TAB that has been inspected
When winding tape 3 with winding wheel 11, roll 1
Another interleaver 15 is sent out from 7, and again TAB
It is wound together with the tape 3 onto the winding loop II.

The position detection device 21 includes a stop position detector 23 and an end detector 2.
5, both of which emit light from the light emitting part on the lower side of the TAB tape 3, and the light that passes through the sprocket hole provided at the edge of the TAB tape 3 is received by the light receiving part on the upper side of the TAB tape 3. The position of the TAB tape 3 is detected. The stop position detector 23 detects whether the TAB tape 3 conveyed every predetermined number of frames is stopped at a predetermined position in the automatic inspection section 31, and if there is a deviation in the stop position,
Used to correct position. On the other hand, the termination detector 2
5 is used to detect the end of the TAB tape 3.

The automatic inspection section 31 is a section that automatically inspects for defects such as damage and pattern deviation for each frame using image recognition technology.
The image obtained is sent to the signal processing device 35, and the presence or absence of defects is determined by performing pattern matching between this image and a reference image stored in advance. TAB tape 3
The position of the frame with the above defect is this signal processing device 35.
The information is stored in a storage device (not shown) via the . Offline dialogue system 10 connected to this automatic inspection section 3I
1 allows the automatic inspection section 31 to arbitrarily change the criteria for determining damage and the like.

- There are various types of damage and dimensional deviations, and the criteria for determining defects differ depending on the accuracy required for the IC to be mounted. therefore,
By providing this offline dialogue system 101, the operator can flexibly respond to the intended use and required quality of the automatic inspection section 31 and TAB tape 3.

The verification section 41 is for displaying the coral flaws inspected by the automatic inspection section 31 on a television screen. That is, when a defect is found on the TAB tape 3 by the automatic inspection section 31, a signal indicating the position of the defect is sent from the signal processing device 35 to the ↑V camera position control section 43. T
Based on this signal, the V camera position control section 43 moves the television camera 45 to the position of the defect and sends the image signal to the television monitor 47. The operator can view this image and check for defects if necessary.

The visual inspection section 51 has the same role as the verification section 41, but whereas the verification section 41 checks for defects through the television monitor 47, it checks defects using an optical stereoscopic microscope. This involves observing the coralline area with the naked eye.

The television camera 45 or the television monitor 47 may have insufficient resolution, and in such cases the visual inspection section 51
The function of the verification section 41 can be supplemented by the following. Furthermore, when the verification section 4 does not operate due to a failure, the visual inspection section 51 can confirm coral defects.

When the puncher 61 receives information indicating that a defect has been detected from the signal processing device 35 of the automatic inspection section 31, it waits until the frame with the defect is transferred to the position of the puncher 61, operates, and transfers the defective frame to the TAB tape 3. perforate. The diameter of the hole provided at this time is such that it can be easily recognized with the naked eye, for example, 51 m.

Furthermore, if the automatic inspection section 31 has a function of not only determining the presence or absence of a defect but also the type of defect, marking may be performed accordingly.

Instead of operating the puncher 61 under the control of the signal processing device 35 as described above, punching can also be stopped by the input button 73 of the operation unit 71. In this way, even if the automatic inspection section 31 determines that there is a defect, the operator can check it with the verification section 41 or the visual inspection section 51 and ultimately determine that it is possible to mount an IC. 1, it is possible to avoid drilling holes in the frame. In this case as well, multiple types of markings are possible depending on the type of defect. Although the puncher 61 is used in this embodiment, other punches may be used as long as they can be recognized with the naked eye. For example, special characters or symbols may be attached to a defective frame.

The splicer 81 is a device that, when a large number of flaws are detected over consecutive frames of the TAB tape 3, cuts out several consecutive frames and rejoins the front and back of the part. FIG. 5 is a schematic perspective view of this splicer 81. When a defect is continuously detected in the TAB tape 3 over a predetermined number of frames or more (for example, 10 frames or more), information about the defective frames is transmitted from the signal processing device 35 of the automatic inspection section 31 to the splicer 81. sent to. Based on this information, the splicer 81 continuously cants the flawed part with a special force/lid 83, and also cuts the end face of the front part 3a and the rear part 3b of this cut part.
The end faces of the two are butted together as shown in FIG. 5 and joined with a splicing tape 85. After that, by rotating the forming canter 87 in the direction of the arrow Y in FIG.
At the same time as cutting the part protruding from the AB tape 3, a sprocket hole is made in the splicing tab 83.

It is possible to remove a predetermined number or more consecutive frames from the TAB tape 3 inspected in this way.

Next, the operation of the main parts of the present invention will be explained with reference to FIGS. 1 to 3. FIG. 1 is a diagram showing the positional relationship between a stop position detector for detecting the stop position of the TAB tape and a sprocket hole provided at the edge of the TAB tape.

The stop position detector 23 is the light emitting part 2 on the lower side of the TAB tape 3.
3a and an upper light receiving part 23b, the light receiving part 23b is turned on when it receives the light passing through the sprocket hole 9, and the light is blocked in the part between the sprocket holes 9. Sometimes it turns off. The resolution of this transmission type photoelectric sensor is, for example, ±5 μm.

The stop position detector 23 is configured so that when the TAB tape 3 is stopped at a predetermined position as shown in FIG. Deploy.

The light receiving section 23b has a certain darkness value, and when the received light is below this darkness value, it is turned off, and when it is above this darkness value, it is turned on.
The output is a two-channel signal. Therefore, when the TAB tape 3 stops beyond a predetermined stop position, it is turned off, and when it stops before reaching the predetermined stop position, it is turned on. This detection method cannot be used when the error in the stop position exceeds the size of the sprocket hole 9, but the pinch roll 9
When transferring by I, there is no problem in fact because such a large error does not occur.

The output of the light receiving section 23b is sent to the control section 92.

FIG. 2 is a flowchart 1 to 1 showing the operation of this control section 92.
It is. In step 1, the first transfer path #p when the inspection of the TAB tape 3 is started.

Set. This transfer distance P. varies depending on how many frames are to be inspected. For example, when inspecting every frame, the length corresponding to one frame is, for example, 28.5
11), or when inspecting every 6 frames, the length (6 x 28.5 mm) corresponding to 6 frames is the initial transfer distance P. Set as .

In step 2, after the TAB tape 3 is transferred by the pinch roll 91 by the distance set in step 1, the TAB tape 3 is stopped, and in step 3, the stop position detector 23
determine whether it is on or off.

At this time, as understood from Fig. 1, the TAB tape 3
If the light stops after exceeding a predetermined stop position, the light is blocked and the light is turned off. If the light stops before reaching the predetermined stop position, the light passes through the sprocket hole 9 and is turned on. As a result, when it is determined that it is on in step 3, the next transfer distance can be set to 1, for example, using the steering knob 4.
Set 0 μm longer (P=Po +10 μm). on the other hand,
When it is determined that the steering knob 3 is off, the next transfer distance is set to be 10 μm shorter in the steering knob 5 (P
When a new transfer distance is set (5), the process returns to step 2 to transfer the TAB tape 3 to inspect the next frame, and the same operations as in section 2 are repeated. In this way, the deviation of the feed position caused by the pinch roll 9I is corrected, and the TAB
The tape 3 is stopped at a position within a predetermined error range and inspected.

FIG. 3 is a flowchart showing the operation of other control sections,
The same reference numerals are given to the same operating parts as in FIG. 2, and the explanation thereof will be omitted. This flowchart 1 differs from the one shown in FIG. 2 in that steps 6 and 7 are added between steps 2 and 3 to detect the end of the TAB tape 3.

In some cases, sprocket holes are not provided at the end of the TAB tape 3 during the inspection stage.

Therefore, when the TAB tape 3 reaches the end, the end detector 25 shown in FIG. 4, which had been repeatedly turned on and off until then, remains off. Therefore, when it is determined in step 6 that the termination detector 25 is repeating on/off, the process moves to step 36 and the above-mentioned operation is performed, and when it is judged that the on/off repeat has stopped, the process moves to step 7. do. In step 7, the transport distance of the TAB tape 3 is set to the first transport path Hp set in step 1. Set it again. In this way, T
When the sprocket hole 9 is not formed at the end of the AB tape, the TAB tape 3 near the end is moved to the initially set transfer path jilt without performing feedforward based on the signal from the stop position detector 23. P. Send by.

Thereby, even if a sprocket hole is not formed at the end, the TAB tape 3 near the end can be accurately transferred.

Instead of passing through step 7, the route shown by the broken line (A) may be taken. In this case, each frame near the end is inspected by setting the last transfer distance of the TAB tape currently being inspected as the next transfer distance.

In the above embodiment, the stop position detector 23 and the end detector 25 are separately provided as the position detecting device 21, but one detector may be used for both.

Furthermore, although the above embodiments have been described using a TAB tape inspection apparatus as an example, the present invention is not limited to the above embodiments, but can be widely applied to general long article inspection apparatuses.

〔Effect of the invention〕

As explained above, according to the present invention, even when a belt-like object is transported using a transporting means that is likely to cause slippage, the belt-like object that is intermittently transported can be accurately transported with a simple structure. Accordingly, it is possible to provide an automatic inspection device for a strip that can be stopped at a suitable position.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the positional relationship between the strip and the stop position detector, FIGS. 2 and 3 are flow charts showing the operation of the control section, and FIG. 4 is a schematic configuration diagram showing one embodiment of the present invention. , FIG. 5 is a schematic perspective view of the splicer. ■...Supply reel, 3...TAB tape, 5/15
...Interleaver, 7.17...Reel, 9...Sproqueso 1-111
...Take-up reel, 21...Position detection device, 23...
- Stop position detector, 25... End detector, 31...
Automatic inspection section, 4]...Helpification section, 51...Visual inspection section, 61...Punjar, 71...
- Operation unit, 81... Splicer, 91... Pinch roll, 92... Control [3,101... Offline dialogue system.

Claims (2)

[Claims] (1) It has a sprocket hole at the end and has a transport means for transporting a belt-shaped body composed of a plurality of consecutive frames to be inspected by a distance corresponding to a predetermined number of frames and then stops the belt-shaped body, In an automatic belt-shaped body inspection device that inspects each frame for defects while the body is being transported, an edge of a sprocket hole formed in the belt-shaped body located in the transport direction is used to inspect the parts after being transported. stop position detection means for detecting whether or not the strip has stopped beyond a predetermined stop position; and when the strip has stopped beyond the predetermined stop position based on a signal from the stop position detection means. shortens the next transport distance by a first minute distance, and when the strip stops before reaching the predetermined stop position, shortens the next transport distance by a second minute distance.
and control means for controlling the transfer of the transfer means so as to increase the length by a very small distance. (2) In the automatic strip inspection device according to claim 1,
Termination detection means for detecting the termination of the strip is provided, and when the termination detection means detects the termination of the strip, the control means controls the transfer means so that the distance of the strip is a predetermined distance. An automatic belt-shaped body inspection device characterized in that it is configured to: