JP2012059901A - Mounting device of electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting device capable of accurately mounting a TCP on an upper surface of a side part of a substrate.SOLUTION: A mounting device comprises a placing table 37 on which a liquid crystal display panel is placed on an upper surface so as to project out at least one side part; side part sucking portions 41a-41g formed on the upper surface of the placing table 37, and holding a part positioned on the upper surface of the placing table 37 of one side portion of the liquid crystal display panel; a porous sheet 53 provided on the whole of the upper surface of the placing table 37, making the suction force of the side part sucking portions 41a-41g work on the liquid crystal display panel, and formed with a large number of small holes forming recessed portions on the whole of the upper surface of the placing table 37; a backup tool held on the upper surface of the placing table 37, and supporting a lower surface of the one side part of the liquid crystal display panel projecting out from the upper surface; and a pressurizing tool mounting a TCP on the upper surface of the one side part of the liquid crystal display panel supported by the backup tool on the lower surface.

Description

  The present invention relates to an electronic component mounting apparatus for mounting a TCP (Tape Carrier Package) as an electronic component on a liquid crystal display panel as a substrate.

  For example, when manufacturing a liquid crystal display panel as a substrate, TCP (TAB component) as an electronic component is mounted on the liquid crystal display panel by a mounting device. When mounting the TCP on a liquid crystal display panel, first, the liquid crystal display panel in which the TCP is temporarily bonded to one side by an anisotropic conductive tape is driven in the horizontal direction (X, Y direction) and the vertical direction (Z direction). To be mounted on the mounting table.

  The liquid crystal display panel is supplied and mounted with one side part to which the TCP is temporarily pressure-bonded protruding outward from the side part of the mounting table, and at least the side part corresponding to the one side part is the upper side. It is sucked and held by the suction force generated in the suction part formed on the upper surface of the writing table.

  Next, the placement table is positioned above the backup tool after transporting and positioning the liquid crystal display panel so that one side of the liquid crystal display panel to which TCP is temporarily bonded is placed on the upper end surface of the backup tool. The mounted tool is lowered and the TCP is heated under pressure. As a result, the anisotropic conductive tape is melted and cured, so that the TCP is mounted on the upper surface of the side portion of the liquid crystal panel.

  By the way, the liquid crystal display panel is formed by bonding two very thin glass plates having a thickness of 1 mm or less. Therefore, when the liquid crystal display panel is sucked and held by the suction force generated in the suction portion formed on the upper surface of the mounting table, if dust is interposed between the upper surface of the mounting table and the liquid crystal display panel, the dust is Even if it is fine, since a local stress is applied to the glass plate of the liquid crystal display panel, the liquid crystal display panel may be damaged by the stress.

  Therefore, conventionally, when an elastic member is attached to the upper surface of the mounting table and fine dust is interposed between the upper surface of the mounting table and the liquid crystal display panel, the elastic member is elastically deformed, whereby the liquid crystal display panel It has been practiced to alleviate the application of local stress to the glass plate. Patent Document 1 discloses that an elastic member is attached to the upper surface of the mounting table.

JP-A-5-109827

  By the way, if an elastic member is provided on the upper surface of the mounting table, if the liquid crystal display panel is sucked and held by the suction force generated in the suction portion on the upper surface of the mounting table, the suction force causes the elastic elasticity through the liquid crystal display panel. Since the member is compressively deformed, the side portion where the TCP of the liquid crystal display panel is mounted may be deformed together with the elastic member.

  In addition, even when the TCP is temporarily crimped or permanently crimped to the side portion of the liquid crystal display panel by the mounting tool, if the pressing force is applied to the side portion of the liquid crystal display panel by the mounting tool, the pressure is elastic. Since the member is compressively deformed, the liquid crystal display panel may be deformed together with the elastic member.

  Thus, when TCP is temporarily crimped or permanently crimped to the side part of the liquid crystal display panel with the mounting tool, if the side part of the liquid crystal display panel is deformed, the mounting accuracy of the TCP with respect to the side part decreases, In some cases, mounting defects are caused.

  According to the present invention, even if dust is interposed between the mounting table and the substrate, it is possible to prevent the substrate from being damaged by applying stress to the dust, and the substrate is sucked and held on the mounting table. It is an object of the present invention to provide an electronic component mounting apparatus in which the substrate is not deformed and the mounting accuracy of the electronic component is not lowered.

The present invention is a mounting apparatus for mounting an electronic component on the upper surface of one side of a substrate,
A mounting table having a flat upper surface, on which the substrate is mounted with at least one side protruding;
A suction part that holds at least a portion that is formed on the upper surface of the mounting table and is located on the upper surface of the mounting table on one side of the substrate;
A porous sheet provided on the entire top surface of the mounting table, causing the suction force of the suction part to act on the substrate, and having a plurality of small holes forming recesses on the entire top surface of the mounting table;
A backup tool which is held on the upper surface of the table and supports the lower surface of one side of the substrate protruding from the upper surface;
An electronic component mounting apparatus comprising: mounting means for mounting the electronic component on an upper surface of one side portion of the substrate whose lower surface is supported by the backup tool.

A plurality of suction portions are provided separately on the upper surface of one side portion of the placing table,
It is preferable that the small holes formed in the porous sheet have a size that does not allow adjacent suction portions to communicate with each other.

  The porous sheet is preferably detachably attached to the upper surface of the mounting table.

  The porous sheet is formed of a material that is not compressed and elastically deformed by the substrate when the suction unit sucks the substrate placed on the upper surface of the placement table by suction force. Is preferred.

  The porous sheet is preferably formed of resin or rubber.

  The porous sheet is preferably formed of an antistatic material.

  According to the present invention, since the porous sheet in which a large number of small holes for forming the recesses are formed on the entire upper surface of the mounting table is provided, the dust interposed between the mounting table and the substrate is small holes. Therefore, even if the porous sheet is not made elastic, it is possible to prevent dust from applying stress to the substrate and damaging it.

  In addition, since the suction force generated at the suction portion of the mounting table can be reliably applied to the substrate by the small holes formed in the porous sheet, the holding state of the substrate by the suction force is not impaired.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows schematic structure of the mounting apparatus of one embodiment of this invention. The perspective view of a liquid crystal display panel. The perspective view which shows the terminal provided in the liquid crystal display panel and TCP. The top view which showed the side part suction part and center suction part which fractured | ruptured the porous sheet stuck on the upper surface, and was provided in the mounting table. Sectional drawing which expands and shows the part in which the mounting table side part suction part was provided. The top view which expands and shows a part of porous sheet. Sectional drawing which expands and shows a part of porous sheet affixed on the mounting table.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a schematic configuration diagram of a mounting apparatus. In this mounting apparatus, a tape-like anisotropic conductive member 5 having adhesiveness on one side of a liquid crystal display panel 4 as a glass substrate shown in FIG. As described later, the TCP 6 as the electronic component temporarily bonded by the pressure bonding is finally bonded.

  As shown in FIG. 3, a plurality of first leads 4a are provided at a predetermined pitch on the upper surface of one side of the liquid crystal display panel 4, and the first lead 4a is disposed on the lower surface of one end of the TCP 6. Are provided with a plurality of second leads 6a.

  Then, as will be described later, the lower surface of the side portion of the liquid crystal display panel 4 is supported by the upper end surface of the backup tool 17 and the TCP 6 temporarily bonded to the upper surface of the side portion is pressurized and heated by the pressure tool 15. Then, the TCP 6 is finally pressure-bonded to the liquid crystal display panel 4.

  As shown in FIG. 2, the liquid crystal display panel 4 has a pair of glass plates 4b bonded to each other at a predetermined interval via a sealing agent (not shown), and liquid crystal is sealed between them, and each glass plate 4b A polarizing plate 4c (only one is shown) is stuck to the outer surface over the entire surface excluding the peripheral portion. The TCP 6 is temporarily pressure-bonded to the upper surface of the side portion of the lower glass plate 4b via the anisotropic conductive member 5, and is finally pressure-bonded as described later.

  As shown in FIG. 1, the mounting apparatus includes a crimping unit 11 as a pressurizing unit and a mounting table 37 to be described later in a horizontal direction (X and Y directions), a rotational direction (θ direction), and a vertical direction (Z The positioning unit 12 is moved in the direction).

  The crimping unit 11 has a gantry 13, and a pressing tool 15 as a mounting means is driven in a vertical direction by a vertical driving source 16 such as a servo motor on a support portion 14 provided at the upper end of the gantry 13. It is provided so that it can be positioned.

  The pressurizing tool 15 includes a first heater 15b so that the pressurizing tool 15 can be heated to several hundred degrees. Further, the lower end surface of the pressurizing tool 15 is formed on the pressurizing surface 15a, and a backup tool 17 having a configuration to be described later is erected vertically below the pressurizing surface 15a. A second heater 17 b is embedded in the upper end portion of the backup tool 17, and the upper end surface is a support surface 17 a parallel to the pressing surface 15 a of the pressing tool 15.

  The backup tool 17 has a length capable of supporting the entire length of the side portion of the liquid crystal display panel 4, and the pressure tool 15 is set to a length corresponding to the backup tool 17.

  The positioning unit 12 is disposed on the side of the crimping unit 11. The positioning unit 12 includes an X stage 18, and the X stage 18 is provided with an X movable body 20 driven in the X direction by an X drive source 19.

  A direction perpendicular to the paper surface of FIG. 1, which is a direction parallel to the longitudinal direction of the backup tool 17 of the crimping unit 11, is defined as an X direction, and a direction intersecting the X direction is defined as a Y direction. The Y direction is indicated by an arrow in FIG. Therefore, the pressurizing tool 15 and the backup tool 17 are formed long in the X direction.

  A cushion sheet 24 is provided along the X direction between the pressing surface 15 a of the pressing tool 15 and the support surface 17 a of the backup tool 17. The cushion sheet 24 is formed of a heat resistant resin such as a fluororesin.

  When the TCP 6 temporarily press-bonded to the liquid crystal display panel 4 is finally pressure-bonded by the pressure tool 15, the cushion sheet 24 is melted by being interposed between the anisotropic conductive members 5. The adhesion to the 15 pressure surfaces 15a is prevented.

  The cushion sheet 24 is fed out from a supply reel (not shown) arranged on one end side in the longitudinal direction of the pressure tool 15, and the used part is wound by a take-up reel (not shown) arranged on the other end side in the longitudinal direction. It has come to be taken.

  A Y stage 21 is integrally provided on the upper surface of the X movable body 20. A Y movable body 22 is provided on the upper surface of the Y stage 21. The Y movable body 22 is driven by a Y drive source 23 in the Y direction orthogonal to the X direction.

  On the upper surface of the Y movable body 22, a support body 25 having a crank-shaped side surface is erected. A screw shaft 27 and a guide shaft 28 are provided between the support portion 26 at the upper end of the support body 25 and the Y movable body 22 so that the axis is perpendicular to the plane formed by the X and Y directions. Yes. The screw shaft 27 is rotatably provided, and the guide shaft 28 is fixedly provided.

  A Z movable body 29 is screwed onto the screw shaft 27, and the guide shaft 28 is slidably inserted into the Z movable body 29. Therefore, if the screw shaft 27 is rotated, the Z movable body 29 moves up and down along the guide shaft 28 without rotating.

  An upper end portion of the screw shaft 27 protrudes from the upper surface of the support portion 26, and a driven gear 30 is fitted to the protruding end. A driving gear 31 is engaged with the driven gear 30. The drive gear 31 is fixed to a drive shaft 32 a of a Z drive source 32 provided on the support 25. Therefore, when the Z drive source 32 is actuated and the drive shaft 32a rotates, the screw shaft 27 is rotated via the pair of meshed gears 30, 31, so that the Z movable body 29 is indicated by an arrow in FIG. It is driven in the Z direction shown.

  One side of an L-shaped attachment member 34 is fixed to the Z movable body 29. A θ drive source 35 is provided on the lower surface of the other side of the mounting member 34 that is horizontal, and a θ movable body 36 that is rotationally driven about the vertical axis by the θ drive source 35 is provided on the upper surface. .

  On the upper surface of the θ movable body 36, the above-described table 37 having a rectangular planar shape is provided with its center portion aligned with the center of rotation of the θ movable body 36. As will be described later, the liquid crystal display panel 4 is sucked and held on the flat upper surface 37a of the mounting table 37.

  In addition, as shown in FIG. 1, the liquid crystal display panel 4 has the above-mentioned mounting table 37 in a state in which the side part to which the TCP 6 is temporarily bonded is protruded outward from the side edge along the X direction of the mounting table 37. Held on.

  As shown in FIG. 4, the upper surface of one side portion of the placement table 37 has a plurality of side suction portions at a predetermined interval with respect to the longitudinal direction of the one side portion, and in this embodiment, the one side portion. The first side suction part 41a is provided at the central part in the longitudinal direction of the first and second side suction parts 41b to 41g symmetrically with respect to the side suction part 41a. A central suction portion 42 is formed at the central portion of the mounting table 37 described above. Here, the number indicating all of the plurality of side suction portions is 41 as shown in FIG.

  The liquid crystal display panel 4 is placed with one side portion on which the TCP 6 is mounted protruding from the one side portion where the side suction portion 41 of the placement table 37 is formed by a predetermined length.

  As shown in FIGS. 4 and 5, each side suction portion 41 is provided with a rectangular groove 44 a formed on the upper surface of the mounting table 37 and a pair of opposite sides of the rectangular groove 44 a that communicate with both ends. And a plurality of straight grooves 44b.

  As shown in FIG. 5, a suction hole 45a is provided at one end of one of the plurality of linear grooves 44b. The other end of the suction hole 45a opens on the lower surface of the mounting table 37, and one end of the suction tube 45 is connected to the other end. As shown in FIG. 4, the suction pipe 45 connected to each side suction part 41 is connected to a header 47 via an opening / closing control valve 46. A suction pump 48 is connected to the header 47.

  The first side suction part 41a and the pair of seventh side suction parts 41g have a rectangular groove 44a larger than the other side suction parts, and the rectangular groove of the first side suction part 41a. A vertical groove 44c intersecting the straight groove 44b is formed in 44a, and one end of the suction hole 45a is opened at the intersection of the vertical groove 44c and the straight groove 44b.

  The central suction portion 42 is provided with three rectangular grooves 51a having different sizes concentrically, and these rectangular grooves 51a communicate with each other by a plurality of linear communication grooves 51b. A suction hole (not shown) is formed at one intersection of one rectangular groove 51a and the communication groove 51b.

  The other end of the suction hole is opened on the lower surface of the mounting table 37, and at the other end, like the side suction portions 41a to 41g, a header is provided by a suction pipe (both not shown) having an open / close control valve. A suction pump 48 is connected via 47.

  If the opening / closing control valve 46 provided in each suction pipe 45 communicating with the first to seventh side suction parts 41a to 41g and the suction pump 48 is controlled, suction is performed when the suction pump 48 is operated. The side suction portions 41a to 41g where the force is generated can be controlled.

  That is, when the size of the liquid crystal display panel 4 supplied and placed on the placement table 37 is changed, the suction force is generated according to the length of the side portion of the liquid crystal display panel 4 that is the size. The part suction parts 41a to 41g can be controlled. As a result, a suction force is not generated in the side suction portion of the portion not covered by the side portion of the liquid crystal display panel 4.

  The crimp unit 11, positioning unit 12, opening / closing control valve 46 and suction pump 48 are controlled by a control device (not shown).

  As shown in FIGS. 4 and 5, a porous sheet 53 formed of a material such as resin or rubber is applied to the upper surface of the mounting table 37, as shown in FIG. The formed adhesive surface 53a is attached to be detachable.

  The porous sheet 53 has a thickness of 1 mm or less, for example, and a large number of small holes 54 having a diameter of several tens of μm penetrating in the thickness direction are regularly formed, for example, in a staggered manner as shown in FIG. Yes. The diameter of the small hole 54 is set to a size that does not straddle the adjacent rectangular grooves 44a of the plurality of side suction portions 41a to 41g formed at a predetermined interval.

By setting the thickness of the porous sheet 53 made of resin or rubber to 1 mm or less, when the liquid crystal display panel 4 is adsorbed to the mounting table 37, the porous sheet 53 is almost elastically compressed and deformed. There is no.
Even if the thickness of the porous sheet 53 is 1 mm or more, it may be formed of a material that is not elastically deformed by the compressive force applied when the liquid crystal display panel 4 is adsorbed.

And the diameter of the small hole 54 formed in the porous sheet 53 was made into the magnitude | size which does not straddle the rectangular groove | channel 44a of an adjacent side part suction part.
Therefore, according to the size of the liquid crystal display panel 4, among the pair of adjacent side suction portions, for example, the sixth side suction portion among the sixth side suction portion 41f and the seventh side suction portion 41g. When a suction force is generated in 41f and no suction force is generated in the seventh side suction portion 41g, the suction force generated in the sixth side suction portion 41f passes through the small holes 54 of the porous sheet 53. It is prevented from acting on the adjacent seventh side suction part 41g that does not generate a suction force. That is, it is possible to prevent the suction force of the sixth side suction part 41f from leaking to the seventh side suction part 41g and reducing the suction force of the sixth side suction part 41f.

The material such as resin or rubber forming the porous sheet 53 has an electric resistance of 10 ⁵ to 10 ¹⁰ ohms, that is, the electric resistance is set so that the porous sheet 53 has a property as an antistatic material.

  Therefore, even if the liquid crystal display panel 4 is repeatedly supplied to and removed from the mounting table 37 and rubbed, the porous sheet 53 will not be charged. Therefore, a circuit formed on the liquid crystal display panel 4 by charging. It is possible to prevent the pattern from being damaged.

  According to the mounting apparatus having the above configuration, the porous sheet 53 having a large number of small holes 54 is detachably attached to the upper surface of the mounting table 37. The small holes 54 form a large number of recesses on the upper surface of the mounting table 37 with a depth corresponding to the thickness of the porous sheet 53.

  Therefore, when the liquid crystal display panel 4 is sucked and held on the upper surface of the mounting table 37, for example, even if dust attached to the liquid crystal display panel 4 falls on the upper surface of the mounting table 37, FIG. As shown, most of the dropped dust P enters the small hole 54, which is a recess of the mounting table 37.

  Therefore, when the liquid crystal display panel 4 is sucked and held by causing suction to the side suction parts 41a to 41g and the central suction part 42 formed on the mounting table 37, the dust P that has fallen on the mounting table 37 is liquid crystal. It may be possible to prevent the liquid crystal display panel 4 from being damaged by applying a local stress to the display panel 4.

  In addition, since the dust P enters the small holes 54, the liquid crystal display panel 4 is prevented from floating from the upper surface of the mounting table 37, so that the liquid crystal is generated by the suction force generated by the side suction portions 41a to 41g and 42. In some cases, the display panel 4 is securely held by suction on the upper surface of the mounting table 37.

  Since the porous sheet 53 is interposed between the mounting table 37 and the liquid crystal display panel 4 held by suction on the upper surface of the mounting table 37, the mounting table 37 is placed on the plate surface of the liquid crystal display panel 4. The first to seventh side suction parts 41a to 41g and the central suction part 42 formed in the above are not in direct contact with each other. Thereby, it is possible to prevent the suction marks of the side suction parts 41 a to 41 g and the central suction part 42 from adhering to the plate surface of the liquid crystal display panel 4.

  The porous sheet 53 is detachably attached to the upper surface of the mounting table 37 by the adhesive surface 53a. Therefore, if the porous sheet 53 is damaged by use for a predetermined period, it can be easily attached to a new porous sheet 53.

Since the porous sheet 53 has a property as an antistatic material electrically, even if the liquid crystal display panel 4 is repeatedly supplied to and removed from the mounting table 37, the porous sheet 53 is subjected to the frictional force at that time. 53 is not charged.
Therefore, the porous sheet 53 is not discharged, and the discharge does not damage the circuit pattern of the liquid crystal display panel 4 placed on the placement table 37.

  The porous sheet 53 has a thickness that does not compressively deform, for example, a thickness of 1 mm or less. Therefore, the porous sheet 53 is absorbed by the liquid crystal display panel 4 by adsorbing the liquid crystal display panel 4 placed on the placement table 37 with the suction force generated in the first to seventh side suction portions 41a to 41g. Even if pressed, the porous sheet 53 hardly elastically compresses and deforms, so that the side portion of the liquid crystal display panel 4 is not bent downward.

  Therefore, when the TCP 6 is finally pressure-bonded to the side portion of the liquid crystal display panel 4, it is possible to prevent the mounting accuracy of the TCP 6 from being lowered because the side portion of the liquid crystal display panel 4 is bent downward.

  That is, the liquid crystal display panel 4 can be sucked and held on the upper surface of the mounting table 37 without being damaged by dust interposed between the upper surface of the mounting table 37 and without bending the side portion. Therefore, it is possible to improve the mounting accuracy of the TCP 6 on the side portion.

  In the above embodiment, a plurality of side suction portions are formed on the side portions of the mounting table so that the suction force generated in each suction portion can be controlled separately, but the liquid crystal display supplied to the mounting table If the size of the panel is constant, one side suction portion may be formed on the side portion of the mounting table over almost the entire length of the side portion.

Moreover, the shape of the groove | channel of the side part suction part multicenter suction part is not limited at all.
Further, instead of sticking the porous sheet on the upper surface of the mounting table, a porous sheet having small holes may be provided by coating a material such as resin on the upper surface of the mounting table.

  In the above-described embodiment, an example in which the TCP is permanently bonded to the side portion of the liquid crystal display panel has been described. However, the present invention can be applied even when temporarily bonded.

  DESCRIPTION OF SYMBOLS 4 ... Liquid crystal display panel (board | substrate), 6 ... TCP (electronic component), 17 ... Backup tool, 15 ... Pressurization tool (mounting means), 37 ... Mounting table, 41a-41g ... 1st-7th side part Suction part, 42 ... central suction part, 53 ... porous sheet, 54 ... small hole.

Claims (6)

A mounting device for mounting electronic components on the upper surface of one side of a substrate,
A mounting table having a flat upper surface, on which the substrate is mounted with at least one side protruding;
A suction part that holds at least a portion that is formed on the upper surface of the mounting table and is located on the upper surface of the mounting table on one side of the substrate;
A porous sheet provided on the entire top surface of the mounting table, causing the suction force of the suction part to act on the substrate, and having a plurality of small holes forming recesses on the entire top surface of the mounting table;
A backup tool which is held on the upper surface of the table and supports the lower surface of one side of the substrate protruding from the upper surface;
An electronic component mounting apparatus comprising: mounting means for mounting the electronic component on an upper surface of one side portion of the substrate whose lower surface is supported by the backup tool. A plurality of suction portions are provided separately on the upper surface of one side portion of the placing table,
2. The electronic component mounting apparatus according to claim 1, wherein the small holes formed in the porous sheet have a size that does not allow adjacent suction portions to communicate with each other.   2. The electronic component mounting apparatus according to claim 1, wherein the porous sheet is detachably attached to the upper surface of the mounting table.   The porous sheet is formed of a material that is not compressed and elastically deformed by the substrate when the suction unit sucks the substrate placed on the upper surface of the placement table by suction force. The electronic component mounting apparatus according to claim 1.   5. The electronic component mounting apparatus according to claim 4, wherein the porous sheet is made of resin or rubber.   5. The electronic component mounting apparatus according to claim 4, wherein the porous sheet is formed of an antistatic material.

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