JP3460557B2 - Adhesion device for TAB tape and stiffener - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TA having a low rigidity.
The present invention relates to a device for sequentially bonding individually cut TAB tapes to a metal reinforcing plate called a stiffener which is in a band shape and is intermittently fed in order to prevent warpage of a B tape. In particular, the present invention relates to a positioning mechanism in which the stop position of the stiffener at the bonding processing position can be suitably corrected. 2. Description of the Related Art In recent years, the terminal arrangement of electronic components such as ICs, LSIs, liquid crystal panels and the like has been miniaturized. These electronic components are mounted on a film carrier tape, and the film carrier tape is mounted on another film carrier tape. It has come to be a connection terminal to a circuit. The film carrier tape is generally called a TAB (Tape Automated Bonding) tape. As is well known, the TAB tape is very thin and easily warps, and is not easy to handle. Therefore, in order to supplement the rigidity of the electronic component at a stage before the electronic component is attached, a technique of bonding a reinforcing plate made of a metal such as a copper alloy or stainless steel and generally called a stiffener to a TAB tape is known. Have been. [0003] As an example of the bonding apparatus in this case, a band-shaped stiffener and a band-shaped TAB tape to which an adhesive which becomes tacky when heated are preliminarily adhered to the bonding surface are intermittently fed to a bonding position. At the bonding position, there is a type in which a strip-shaped TAB tape is punched into a predetermined shape by a mold, and the cut TAB tape is pressed on a stiffener heated by a heater. In such an apparatus, the TAB tape must be punched in a predetermined area and must be bonded to a predetermined position of the stiffener. Therefore, the positional accuracy of the TAB tape and the stiffener at the bonding processing position is extremely low. High accuracy is required. The present invention relates to a positioning mechanism that enables a stiffener stop position at a bonding position to be obtained with high accuracy. Conventionally, as such a stiffener positioning mechanism, as shown in FIG. 4 (a), a pilot hole is formed in a belt-shaped stiffener at every pitch of a feed amount, and a feeder is provided. When stopped, it was processed about 10μm thinner than the diameter of the pilot hole,
Move the insertion-type pilot pin with a sharp tip downward and insert it into the pilot hole to correct the deviation of the stiffener stop position.If the pilot pin is displaced so large that it cannot be inserted into the pilot hole, Has detected the insufficient movement of the pilot pin downward, and used a warning function such as automatically stopping the device. However, recently, when the pilot hole of the stiffener is formed by etching, the variation in the diameter of the pilot hole becomes large, and when the diameter is small, the pilot pin is connected to the pilot hole. If it is press-fitted and the diameter is too large, sufficient positioning cannot be performed, and the use of the insertion type pilot pin as shown in FIG. 4A is extremely inconvenient. It has become something. Therefore, at present, instead of the pilot pin shown in FIG. 4 (a), as shown in FIG. 4 (b), it has a diameter larger than the diameter of the pilot hole and has a tapered tip. A tapered pilot pin having a portion formed has been used. [0006] However, FIG.
A taper type pilot pin as shown in (b) is extremely effective when the deviation from the pilot hole is small, but the tapered portion presses the periphery of the pilot hole downward. Therefore, when the displacement is large, as shown in FIG. 4 (c), the tip of the tapered portion pushes and bends a part of the periphery of the pilot hole, and the position of the stiffener may not be corrected. There was a problem that it would. In addition, since the stroke from when the tip of the pilot pin reaches the stiffener arrangement surface to when it reaches the lower limit position is small, it is extremely difficult to detect when the stiffener position is not corrected. The present invention has been made in order to solve such a problem, and an object of the present invention is to intermittently feed a TAB tape to which an adhesive which becomes tacky by heating is attached. In a device that is successively bonded to a belt-shaped stiffener at a predetermined position, the stiffener can be accurately positioned at the bonding processing position, and if positioning is impossible, it can be suitably detected. It is to provide a positioning mechanism. [0008] In order to achieve the above object, the present invention provides a pilot hole which is formed at every pitch, and which is substantially horizontally and intermittently set at a pitch by a feeder. A tape-shaped tapered portion is formed at the tip of a tape-shaped stiffener to be fed to a position where a TAB tape having an adhesive which is tacky by heating is adhered one by one at the predetermined position. It is thin tip surface than the pilot hole to the cutting edge plane
A pilot pin having a cylindrical portion, a cylinder for driving the pilot pin up and down with respect to the stiffener, and a detecting means for detecting a movement position of the pilot pin. It is driven each time it stops, and when the cylindrical portion is fitted into the pilot hole, the stop position of the stiffener can be corrected by the tapered portion , and when the cylindrical portion does not fit into the pilot hole , An uncorrectable stop position can be detected by the detection means. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing an apparatus for cutting a predetermined area of a strip-shaped TAB tape and bonding the strip to a predetermined position of a strip-shaped stiffener, and a part of the apparatus is shown in cross section. FIG. 2 is a plan view showing a state in which a cut TAB tape is adhered to a belt-shaped stiffener, and FIG. 3 (a), FIG. 3 (b), and FIG.
FIG. 3C is a cross-sectional view of a main part for describing the operation of the pilot pin for positioning the stiffener. First, a product processed by the apparatus of this embodiment will be described. As shown in FIG. 2, the stiffener 1 has a band shape, and a total of twelve circular pilot holes 1a are formed at predetermined intervals on both sides in the longitudinal direction. Further, five rectangular holes 1b are formed at positions surrounded by the four pilot holes 1a, respectively. Although a plurality of holes are formed in the stiffener 1 outside the stiffener 1, in this embodiment,
These holes are all formed in advance by etching. Further, to such a stiffener 1, a TAB tape 2 cut in a katakana square shape so as to surround the hole 1b is adhered. The cut TAB tape 2 is obtained by first cutting a strip-shaped tape into a rectangular shape only in a predetermined area by a device to be described later, and bonding the tape one by one to the stiffener 1 in order. In addition, the bonding method is such that an adhesive which is tacky when heated is attached to the bonding surface of the TAB tape 2 in advance, and the cut square-shaped adhesive is applied to the stiffener 1 heated by the heater. The TAB tape 2 is pressed and adhered. Then, the product processed in this manner is joined to an IC package or the like on the TAB tape 2 and cut into individual pieces, thereby becoming a finished product as an electronic component. Next, the overall configuration of the apparatus of this embodiment will be described with reference to FIG. However, FIG. 1 shows only a minimum configuration centered on the configuration of the mold part necessary for understanding the present invention. Therefore, a description of a configuration not shown will be added as necessary. First, a die hole 3a is formed in the base 3 constituting the die of the mold. The base 3 has four columns 4 (only two columns are shown in FIG. 1), and a cylinder 6 is mounted on a platform 5 supported by the columns. The piston 6a operated by the cylinder 6 extends downward through the base 5. The slide plate 7 is attached to the column 4 so as to be able to move up and down, and is attached to the tip of the piston 6a at the center. Therefore, the slide plate 7 is
It moves up and down in conjunction with the up and down movement of the piston 6a. A die punch 8 is mounted on the slide plate 7, and the tip of the punch 8 is guided up and down by a guide hole of a guide block 9 fixed to the base 3. . Although the detailed configuration of the punch 8 is not explicitly shown and is omitted, a tip portion for cutting a predetermined area from the strip-shaped TAB tape and a cut TAB tape 2 are provided at the tip thereof. A hole for adsorbing with air, a pressing portion for pressing the cut TAB tape 2 against the stiffener 1, and the like are formed. The slide plate 7 has a slide plate 7
And four pilot pins 10 (only two are shown in FIG. 1) fitted in guide holes provided in the guide block 9 and the base 3 respectively. These pilot pins 10 are fitted into guide holes provided in the guide block 9 and the base 3, and
It is possible to move up and down with
After each flange 10a abuts on the guide block 9, the spring 10b is compressed so that only the slide plate 7 can be lowered. These pilot pins 10 are pilot pins for the stiffener 1, as will be understood from the following description. A gap S is provided between the base 3 and the guide block 9. The above-mentioned band-shaped TAB tape is arranged in the gap S, and is intermittently fed in a direction perpendicular to the paper surface. However, the feeder is not shown because it is not directly related to the present invention.
Also, for a TAB tape in the form of a strip, four pilot pins are attached to the slide plate 7 in the same configuration as the above-described pilot pin 10, but illustration thereof is omitted. In FIG. 1, a guide rail 11 of the stiffener 1 is arranged below the base 3. The guide rail 11 has a U-shaped cross section with a shallow bottom, and a relief hole 11 a is formed at the bottom in accordance with the pitch of the pilot holes 1 a of the stiffener 1. Further, the bottom of the guide rail 11 has a predetermined area in which a position below the die hole 3a formed in the base 3 is missing, and the heater 12 faces there, and the stiffener 1 facing the heater 12 faces there. Area can be heated. In FIG. 1, on both sides of the mold portion,
The positioning mechanism of the present invention is provided. Since these two positioning mechanisms have exactly the same configuration, the same reference numerals are given and the configuration of one of the positioning mechanisms will be described with reference to FIG. A cylinder 13 is mounted on the upper surface of the base 3, and a pilot pin 14 is mounted on a lower end of the piston 13a. A detector 15 is attached to the side surface of the cylinder 13 and the piston 1
The position of the detected portion 13a 'of 3a can be detected. Further, the pilot pin 14 is
The base 3 is moved up and down by a guide hole 3b formed in the base 3. The main body of the pilot pin 14 is larger than the diameter of the pilot hole 1b of the stiffener 1 and has a tapered portion 14a formed at the tip end thereof. A cylindrical portion 14b smaller than the pilot hole 1a is formed. Next, the operation of the above device will be briefly described. First, in FIG. 1, a belt-like TAB tape (not shown) arranged in the gap S is fed by the feeding device and positioned at a regular position. Next, the stiffener 1 is fed by a predetermined amount (one pitch of the pilot hole 1a) by a feeding device (not shown) and stops. Then, the cylinder 13 operates and the piston 13a
It descends from the state of (a). At this time, Stiffener 1
Is stopped at a regular position or slightly deviated from the regular position, the cylindrical portion 14b of the pilot pin 14 is inserted into the pilot hole 1a of the stiffener 1, and the displacement is Is moved in the horizontal direction by the tapered portion 14a and corrected. This state is shown in FIG. At this time, since the detector 15 detects the detected portion 13a 'of the piston 13a, no warning signal is output. However, when the stiffener 1 stops largely deviating from the normal position, the pilot pin 14
Is lowered, the tip end surface of the cylindrical portion 14b is caught on the periphery of the pilot hole 1a of the stiffener 1 and cannot be lowered by a predetermined amount. At this time, the cylindrical part 1
The distal end face of 4b is, of course, flat, so that the peripheral portion of the pilot hole 1a is not forcibly pushed and deformed as in the above-described conventional example. Such a state is shown in FIG. In this state, the detector 15 detects the detected portion 13 of the piston 13a even if a predetermined time has elapsed.
Since a 'cannot be detected, a warning signal is output, and the apparatus is stopped or a warning is displayed. Therefore, in such a case, the position of the stiffener 1 is corrected by the operator, the stiffener 1 is replaced, the device is inspected in some cases, and the stiffener 1 is set to a proper position. To In this manner, when the stiffener 1 is set at the proper position and the area where the cut TAB tape 2 is to be bonded is heated by the heater 12,
The cylinder 6 of the mold section starts operating, and the slider plate 7
Descends. In this downward movement, first, four pilot pins (not shown) for the TAB tape are inserted into pilot holes formed on both sides of the strip-shaped TAB tape, thereby restricting the horizontal movement of the TAB tape. . Next, the pilot pins 10 (actually four pins) shown in FIG. 1 are inserted into the pilot holes 1a of the stiffener 1, and regulate the horizontal movement of the TAB tape. Therefore, any time thereafter, the above-mentioned cylinder 13
Is operated, and the pilot pin 14 may be raised. After the belt-like stiffener 1 and the belt-like TAB tape (not shown) are positioned as described above, the punch 8 punches a predetermined area from the belt-like TAB tape and cuts the TAB tape 2. (See FIG. 2)
It is sucked by air and penetrated through the die hole 3 a and pressed against the stiffener 1. Therefore, TAB tape 2
The adhesive adhered to the stiffener 1 is heated through the stiffener 1 to generate tackiness, and the TAB tape 2 is adhered to the stiffener 1. Thereafter, the slide plate 7 is raised by the cylinder 6, and all the constituent members are moved to the position shown in FIG.
By returning to the state, the operation of one cycle is completed. In the above-described embodiment, two positioning mechanisms of the present invention which are operated by the cylinder 13 are provided with the mold portion interposed therebetween, but the belt-shaped stiffener 1 has the pilot holes 1a on both sides. Since it is arranged in
The two pilot pins 14 of the two positioning mechanisms may be arranged so as to fit in the pilot hole 1a on the same side, or may be arranged so as to fit in the pilot holes 1a on different sides. No problem. Also, two such positioning mechanisms may be provided on both sides of the stiffener 1, or only one may be provided if the slidability of the stiffener 1 with respect to the guide rail can be obtained well. Furthermore, in the above embodiment, if the pilot pin 14 is raised after the TAB tape 2 is pressed against the stiffener 1, the pilot pin 10 in the mold is not necessarily required. Further, in the above description of the embodiment, the feeding device and the positioning mechanism of the belt-shaped TAB tape have been described, but the present invention is not limited to these configurations. As described above, according to the present invention, in a device in which a TAB tape is successively adhered to a band-shaped stiffener which is fed intermittently by heating, the stiffener is deformed by a pilot pin. Without positioning, if the positioning is not possible, the position can be detected properly. If the positioning is impossible, the defective products can be reduced and the processing efficiency can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an apparatus according to an embodiment of the present invention for cutting a predetermined area of a strip-shaped TAB tape and bonding the cut area to a predetermined position of a strip-shaped stiffener; Some are shown in cross section. FIG. 2 is a plan view showing a state in which the TAB tape cut by the apparatus shown in FIG. 1 is adhered to a belt-shaped stiffener. 3A and 3B are cross-sectional views of a main part for explaining the operation of a pilot pin for positioning a stiffener according to an embodiment. FIG. 3A shows a state before the operation, and FIG. 3 (c) shows a state where normal positioning cannot be performed. 4A and 4B are cross-sectional views of a main part for describing a configuration of a conventional pilot pin for positioning a stiffener; FIG. 4A shows a first conventional example, and FIG. FIG. 4C shows a state in which the pilot pin of the stiffener is deformed in the second conventional example. [Explanation of Signs] 1 Stiffener 1a Pilot hole 1b Hole 2 TAB tape 3 Base 3a Die hole 3b Guide hole 4 5 pillars 6,13 Cylinder 6a, 13a Piston 7 Slide plate 8 Punch 9 Guide block 10,14 Pilot pin 10a Collar portion 10b Spring 11 Guide rail 11a Escape hole 12 Heater 13a 'Detected portion 14a Tapered portion 14b Cylindrical portion 15 Detector

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Claims (1)

(57) [Claim 1] A pilot hole is formed for each pitch, and a belt-shaped stiffener which is fed to a predetermined position substantially horizontally and intermittently by a feeder by a feeder is heated. the TAB tape adhering adhesive resulting tacky by, at the predetermined position, the device one by one bond, the distal end portion is formed a taper portion which tapers, from the pilot hole to the leading edge A pilot pin having a thin cylindrical surface with a flat end surface, a cylinder for driving the pilot pin up and down with respect to the stiffener, and a detecting means for detecting a movement position of the pilot pin. have been, the pilot pins, the stiffener is driven each time a stop, when the cylindrical portion is fitted into the pilot hole, the tapered The stop position of the stiffener can be corrected by the key portion, and when the cylindrical portion does not fit in the pilot hole ,
A stiffener positioning mechanism, wherein the detection means can detect that the stop position cannot be corrected.