WO2019107395A1 - 実装装置 - Google Patents
実装装置 Download PDFInfo
- Publication number
- WO2019107395A1 WO2019107395A1 PCT/JP2018/043737 JP2018043737W WO2019107395A1 WO 2019107395 A1 WO2019107395 A1 WO 2019107395A1 JP 2018043737 W JP2018043737 W JP 2018043737W WO 2019107395 A1 WO2019107395 A1 WO 2019107395A1
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- WIPO (PCT)
- Prior art keywords
- mounting
- film
- cover film
- semiconductor chip
- mounting head
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Definitions
- the present specification discloses a mounting apparatus for mounting a semiconductor chip on a substrate or other substrate that is a semiconductor chip via an adhesive material.
- flip chip bonder technology is widely known in which a semiconductor chip is mounted on an object to be mounted, which is a substrate or another semiconductor chip, without the use of wires.
- an adhesive material made of a thermosetting resin may be applied to the substrate in advance, and the semiconductor chip may be fixed to the substrate via the adhesive material.
- the adhesive material extruded by the semiconductor chip may creep up and adhere to the mounting head.
- fume gas generated from the heated adhesive material may intrude into the mounting head.
- Patent Document 1 discloses a mounting apparatus in which the bottom surface of the thermocompression bonding tool is covered with a film member (cover film) in order to prevent the adhesion of the adhesive material to the thermocompression bonding tool (mounting head). That is, in the mounting apparatus of Patent Document 1, the bonding head is provided with a thermocompression bonding tool and a film member transport mechanism that feeds film members sequentially. According to the mounting apparatus, the adhesion of the adhesive material to the thermocompression bonding tool is effectively prevented.
- Patent Document 2 discloses a mounting apparatus in which a resin film (cover film) is provided separately from a bonding tool.
- the resin film is for protecting the chip (semiconductor chip) from the vibration of the bonding tool, and is not for preventing adhesion of the adhesive material to the bonding tool.
- the joining tool of patent document 2 presses the chip
- the mounting apparatus disclosed in this specification is a mounting apparatus for mounting a semiconductor chip on a substrate or other object to be mounted, which is a semiconductor chip via an adhesive material, comprising: a bonding stage on which the substrate is mounted; A mounting head that performs a base bonding supporting a bonding stage, a temporary pressure bonding process for sucking and holding the semiconductor chip and temporarily pressing on the mounted body, and a main pressure bonding process for final pressing of the temporarily bonded semiconductor chip; A film disposing mechanism provided on the bonding stage or the base and interposing a cover film between the temporarily crimped semiconductor chip and the mounting head at the time of the main pressure bonding, the mounting head, and the film disposing
- a control unit that controls driving of a mechanism, and the film placement mechanism includes a pair of rollers on which the cover film is stretched. Has, sequentially, a film feed mechanism for feeding a new cover film, the cover film, and a film moving mechanism for moving in a horizontal direction with respect to the substrate, it is characterized.
- the control unit is positioned at a retracted position where the cover film is horizontally separated from the mounting section to which the semiconductor chip is temporarily crimped at the time of the temporary crimping process, and at the time of the final crimping process, the semiconductor chip to be fully crimped
- the film moving mechanism may be controlled to be located at an intermediate position, which is directly above.
- the film delivery mechanism spans the cover film so that the cover film covers the upper side of the plurality of mounting sections at the intermediate position, and the control unit is configured to cover the plurality of cover films covered by the cover film.
- the film moving mechanism is driven to move the cover film to a position covering the top of a plurality of new mounting sections, and the film delivery mechanism is driven.
- the cover film may be fed by a distance corresponding to the plurality of mounting sections.
- the mounting sections for mounting the semiconductor chips are defined in a two-dimensional array on the substrate, and the film delivery mechanism is configured to cover the two-dimensional array mounting sections in a row unit.
- the cover film may be stretched.
- the cover film covers the mounting section in row units, thereby simplifying the control of the feed and movement of the cover film.
- control unit causes the mounting head to continuously execute the temporary pressure bonding of the semiconductor chips in the plurality of mounting sections
- main pressure bonding of the plurality of semiconductor chips temporarily compressed is continuously performed. You may run it.
- the number of times of movement of the cover film by the film movement mechanism can be reduced, and therefore the tact time can be further reduced.
- the film arrangement mechanism may further include an elevation mechanism that raises and lowers the cover film with respect to the bonding stage.
- the cover film can be more reliably separated from the upper surface of the semiconductor chip. Further, in the case of stacking and mounting semiconductor chips, the arrangement height of the cover film can be changed according to the number of stacking steps, so that the versatility of the mounting apparatus is improved.
- the film delivery mechanism may include an interference member that assists in the elimination of the deflection by interfering with a part of the cover film which is pressed by the mounting head and bent downward.
- the cover film can be more reliably separated from the upper surface of the semiconductor chip, although the configuration is simple.
- the cover film and the mounting head are separated, it is not necessary to open the cover film. As a result, contamination of the mounting head with the adhesive material can be effectively prevented while reducing the tact time.
- FIG. 1 It is a figure which shows the structure of a mounting apparatus. It is a schematic plan view of a mounting apparatus. It is a side view which shows the mode of temporary pressure bonding. It is a side view which shows the mode of main pressure bonding. It is a top view which shows the mode of temporary pressure bonding. It is a top view which shows the mode of temporary pressure bonding. It is a top view which shows the mode of temporary pressure bonding. It is a top view which shows the mode of main pressure bonding. It is a top view which shows the mode of main pressure bonding. It is a side view which shows the mode of main pressure bonding. It is a side view which shows the mode of main pressure bonding. It is a figure which compares the processing time of a prior art and this example. It is a figure which shows an example of another mounting apparatus.
- FIG. 11A It is a figure which shows the other state of the mounting apparatus of FIG. 11A. It is a perspective view of an interference member used with other mounting devices. It is a figure which shows an example of the mounting apparatus using the interference member of FIG. 12A. It is a figure which shows an example of another mounting apparatus. It is a top view which shows a mode that a circular board
- FIG. 7 is a side view showing how semiconductor chips are stacked and mounted. It is a figure which shows an example of another mounting apparatus. It is a figure which shows an example of the conventional mounting apparatus.
- FIG. 1 is a schematic view showing the configuration of the mounting apparatus 10.
- FIG. 2 is a schematic plan view of the mounting apparatus 10.
- FIG. 3 is a figure which shows the mode of a temporary pressure bonding process
- FIG. 4 is a figure which shows the mode of this pressure bonding process.
- the mounting apparatus 10 is an apparatus for manufacturing a semiconductor device by mounting a plurality of semiconductor chips 100 on a substrate 104 or another semiconductor chip 100 (hereinafter referred to as “mounted body” when the two are not distinguished from each other). It is.
- the semiconductor chip 100 is mounted on the substrate 104 by flip chip bonder technology. Specifically, a protrusion made of a conductive material called a bump 102 is formed on the bottom surface of each semiconductor chip 100, and the bump 102 is bonded to an electrode 105 formed on the surface of the substrate 104.
- the semiconductor chip 100 and the substrate 104 are electrically connected.
- mounting sections 106 for mounting the semiconductor chip 100 are defined in a two-dimensional array. In the illustrated example, fifteen mounting sections 106 are defined in three rows and five columns on one substrate 104. A plurality of electrodes 105 electrically connected to the bumps 102 of the semiconductor chip 100 are formed on the surface of each mounting section 106.
- an adhesive material 108 called a nonconductive paste (NCP) or a nonconductive film (NCF) is applied to each mounting section 106 in advance.
- the adhesive material 108 is made of a thermosetting resin having an insulating property and a thermosetting property.
- pre-application method By mounting the semiconductor chip 100 on the adhesive material 108 and pressing it against the substrate 104 and heating the semiconductor chip 100, the adhesive material 108 is cured and the semiconductor chip 100 is mechanically adhered and fixed to the substrate 104. Be done.
- the method of applying the adhesive material 108 to the substrate 104 in advance in this manner is generally referred to as a "pre-application method".
- the mounting apparatus 10 temporarily mounts the semiconductor chips 100 and then mounts the semiconductor chips 100 on the substrate 104 by the main pressure bonding.
- the temporary pressure bonding is to temporarily place the semiconductor chip 100 in the corresponding mounting section 106 (adhesive material 108) of the substrate 104.
- the semiconductor chip 100 is mechanically and electrically connected to the mounting target (the substrate 104 or the other semiconductor chip 100) by heating and pressurizing the temporarily pressure-bonded semiconductor chip 100. It is.
- the semiconductor chip 100 is heated at a temperature equal to or higher than the curing temperature of the adhesive material 108 and equal to or higher than the melting temperature of the bumps 102.
- main bonding of the plurality of semiconductor chips 100 temporarily bonded is continuously performed.
- the mounting apparatus 10 is an apparatus for mounting the semiconductor chip 100 on the substrate 104 (mounted body) in the procedure described above.
- the mounting apparatus 10 includes a bonding stage 14, a mounting head 12, a base 16, a film arrangement mechanism 18, and a control unit 20 that controls the driving of these components.
- the bonding stage 14 is a stage on which the substrate 104 is mounted.
- the bonding stage 14 is provided with, for example, a suction hole (not shown) for sucking and holding the substrate 104, a heater (not shown) for heating the substrate 104, and the like.
- the bonding stage 14 is supported by a base 16.
- the mounting head 12 is provided to face the bonding stage 14, and is movable in the horizontal and vertical directions with respect to the bonding stage 14.
- the mounting head 12 performs a temporary pressure bonding process and a main pressure bonding process.
- the mounting head 12 receives and conveys the semiconductor chip 100 from a chip supply source (not shown), places each semiconductor chip 100 in the corresponding mounting section 106, and heats and presses it temporarily. It is desirable that the heating temperature at the time of this temporary pressure bonding be equal to or higher than the temperature at which the adhesive material 108 starts to soften and equal to or lower than the curing temperature of the adhesive material 108.
- the mounting head 12 applies pressure and heat to the semiconductor chip 100 temporarily pressure-bonded to the substrate 104 to perform the pressure bonding. It is desirable that the heating temperature at the time of the final pressure bonding be equal to or higher than the melting temperature of the bumps 102 and equal to or higher than the curing temperature of the adhesive material 108. Moreover, the pressure at the time of main pressure bonding is larger than the pressure at the time of temporary pressure bonding.
- suction holes 22 for sucking and holding the semiconductor chip 100 are formed on the bottom surface of the mounting head 12.
- the suction holes 22 communicate with a suction pump (not shown), and the semiconductor chip 100 is suctioned and held on the bottom surface of the mounting head 12 by the negative pressure generated by the suction pump.
- a heater (not shown) is incorporated in the mounting head 12 in order to heat the semiconductor chip 100 during temporary pressure bonding and full pressure bonding.
- the mounting head 12 moves in the horizontal direction in this example, the bonding stage 14 may move in the horizontal direction as described later.
- the mounting head 12 presses the semiconductor chip 100 against the substrate 104 during the pressure bonding.
- a part of the bonding material 108 pushed out by the semiconductor chip 100 may protrude and creep up. If the raised adhesive material 108 adheres to the mounting head 12, the subsequent mounting process may not be properly performed. Further, even if the adhesive material 108 does not adhere to the mounting head 12, the fume gas generated from the heated adhesive material 108 enters the suction holes 22 of the mounting head 12, thereby contaminating the mounting head 12. There was also.
- the cover film 110 is interposed between the mounting head 12 and the semiconductor chip 100 at the time of the main pressure bonding. As shown in FIG. 4, the provision of the cover film 110 effectively prevents the adhesion of the adhesive material 108 to the mounting head 12 and the penetration of the fume gas into the suction holes 22 of the mounting head 12.
- the base 16 of the mounting apparatus 10 is provided with a film placement mechanism 18 for interposing the cover film 110 between the semiconductor chip 100 temporarily pressure-bonded and the mounting head 12 at the time of main pressure bonding.
- a strip-like cover film 110 which is long in one direction is used.
- a material of the cover film 110 a material excellent in heat resistance and having high releasability of the adhesive material 108 is suitable. Therefore, as a material of the cover film 110, for example, a fluorine resin such as polytetrafluoroethylene (PTFE) or tetrafluoroethylene / perfluoroalkylvinylether copolymer (PFA) can be used.
- PTFE polytetrafluoroethylene
- PFA perfluoroalkylvinylether copolymer
- the film placement mechanism 18 has a film delivery mechanism 24 for sequentially delivering the strip-like cover film 110 above the substrate 104.
- the film delivery mechanism 24 simply refers to the feed roller 28a and the take-up roller 28b provided on both sides of the bonding stage 14 (hereinafter, when the delivery / take-up rollers 28a and 28b are not distinguished from each other). )have.
- the cover film 110 is stretched between the pair of feed rollers 28. As the delivery roller 28 a rotates in a predetermined delivery direction (direction of arrow A in FIG. 1), new cover films 110 are delivered one by one.
- take-up roller 28b rotates in the same direction as the delivery roller 28a in conjunction with the delivery roller 28a, whereby the used cover film 110 is taken up and collected by the take-up roller 28b. That is, as the pair of feed rollers 28 rotate in the same direction, the cover film 110 is fed.
- the cover film 110 traverses the substrate 104 in one direction. Also, the cover film 110 is sufficiently wider than the width of the mounting section 106. Therefore, the cover film 110 can cover the upper one of the mounting sections 106 corresponding to one row of the mounting sections 106 arranged in 3 rows and 5 columns, that is, a plurality of (three in the illustrated example) mounting sections 106.
- the take-up roller 28 b is connected to a drive source such as a motor, and is a drive roller that rotates with the drive of the motor or the like.
- the delivery roller 28a may be a drive roller that can rotate independently of the winding roller 28b, or may be a driven roller that rotates with the rotation of the winding roller 28b.
- the delivery roller 28a is a driven roller, it is desirable to provide a biasing member capable of biasing the delivery roller 28a in the direction opposite to the delivery direction so that an appropriate tension can be applied to the cover film 110 to be stretched. Further, in any form, it is desirable to provide a sensor for sensing the amount of the cover film 110 wound around each feed roller 28 in the vicinity of at least one of the two feed rollers 28.
- the replacement time of the cover film 110 may be estimated or the rotational speed of the feed roller 28 may be adjusted.
- the feed / rolling distance (feed amount) of the cover film 110 per rotation of the feed roller 28 is the amount of the cover film 110 wound on each feed roller 28 (more precisely, each feed roller 28 Changes according to the diameter of the film roll 110a formed by winding the cover film 110). Therefore, in order to appropriately control the feed amount of the cover film 110, the tension of the cover film 110, etc., the number of rotations of the feed roller is adjusted according to the amount of the cover film 110 wound around each feed roller 28. Is desirable.
- the film placement mechanism 18 further includes a film moving mechanism 30 for moving the cover film 110 in the horizontal direction along with the film delivery mechanism 24.
- the film moving mechanism 30 has a pair of rails 32 extending in a first direction (longitudinal direction of the rectangular substrate 104 in the illustrated example), and a moving block 34 sliding along the rails 32. .
- the pair of rails 32 is provided on both sides of the bonding stage 14.
- a feed roller 28 is disposed on the moving block 34, and along with the slide movement of the moving block 34, the feed roller 28 and the cover film 110 move in a first direction.
- the two moving blocks 34 attached to the two rails 32 move in an interlocking manner so that the relative position between the delivery roller 28a and the winding roller 28b is always fixed.
- the film moving mechanism 30 moves the feed roller 28 in the first direction, whereby the mounting section 106 (semiconductor chip 100) covered with the cover film 110 is sequentially changed.
- the mechanism for sliding the moving block 34 may be, for example, a mechanism combining a motor (a rotating electric machine) and a ball spline, or a direct acting drive source such as a hydraulic cylinder or a linear motor. It may be a mechanism.
- the film placement mechanism 18 further includes a film lifting mechanism (not shown) that raises and lowers the cover film 110 together with the film delivery mechanism 24.
- the film lifting mechanism is not particularly limited as long as the height of the feed roller 28 can be varied. Accordingly, the film lifting mechanism may have, for example, a cam member that rotates while in contact with the rotation shaft of the feed roller 28.
- the film lifting mechanism may be connected to the rotation shaft of the feed roller 28, and may have a movable body movable in the vertical direction by a driving source such as a motor or a hydraulic cylinder.
- the cover film 110 is positioned in the height direction with respect to the substrate 104 and the semiconductor chip 100 by the film lifting mechanism.
- the control unit 20 controls the driving of the mounting head 12, the film placement mechanism 18, and the bonding stage 14 described above.
- the control unit 20 includes, for example, a CPU that performs various calculations, and a memory that stores various data and programs. Detection results of various sensors are input to the control unit 20, and the control unit 20 performs drive control of each unit according to the detection results. More specifically, the control unit 20 performs movement control of the mounting head 12, temperature control of the heaters of the mounting head 12 and the bonding stage 14, drive control of the suction mechanism, and the like. The control unit 20 also performs drive control of the film placement mechanism 18 in order to place the cover film 110 at an appropriate position.
- 5 to 8 are schematic plan views showing a state in the middle of mounting, and FIGS. 5 and 6 show a state of temporary pressure bonding, and FIGS. 7 and 8 show a state of main pressure bonding.
- the substrate 104 is mounted on the bonding stage 14.
- An adhesive material 108 is applied to the mounting section 106 of the substrate 104 beforehand or after mounting on the bonding stage 14.
- the control unit 20 drives the mounting head 12 to temporarily press-bond the semiconductor chip 100 to each mounting section 106 of the substrate 104.
- the mounting head 12 moves to a chip supply source (not shown), and suctions and holds a new semiconductor chip on its bottom surface. Subsequently, the mounting head 12 moves directly above the corresponding mounting section 106. Thereafter, as shown in FIG. 3, the mounting head 12 is lowered toward the substrate 104, and the semiconductor chip 100 sucked and held is pressed onto the corresponding mounting section 106 (and thus the adhesive material 108) to obtain a semiconductor.
- the chip 100 is temporarily crimped. If one semiconductor chip 100 can be temporarily pressure-bonded, the mounting head 12 lifts after releasing the suction of the semiconductor chip 100.
- the mounting head 12 sequentially performs temporary pressure bonding of all the semiconductor chips 100 in the same procedure.
- the numerals attached to the respective semiconductor chips 100 indicate the order of temporary pressure bonding.
- the semiconductor chip 100 is temporarily crimped from the lower left corner. Then, temporary crimping of the semiconductor chip 100 is performed in a zigzag while reversing the traveling direction for each row.
- the control unit 20 drives the film moving mechanism 30 to move the cover film 110 to the retracted position.
- the retracted position is a position horizontally separated from the mounting section 106 to which the semiconductor chip 100 is temporarily pressure-bonded.
- the retracted position may be a specific fixed position, or may be a variable position that is changed as the mounting section 106 to be temporarily crimped is changed.
- the cover film 110 can be moved to the outside of the substrate 104, the outside of the substrate 104 may be set as the retracted position.
- the cover film 110 is horizontally separated from the mounting section 106 to be temporarily crimped, regardless of which mounting section 106 is temporarily crimped. Therefore, the outside of the substrate 104 is a position-invariant retraction position.
- the position immediately above the mounting section 106 at which the temporary pressure bonding is not performed may be set as the retracted position at this time.
- the mounting section 106 of the substrate 104 is divided into 3 rows on one side (3 rows on the lower side in the drawing) and 2 rows on the opposite side (2 rows on the upper side in the drawing) During the operation, set the position immediately above the other two rows as the retraction position (see Fig. 5), and during the temporary crimping in the other two rows, set the position immediately above the three rows on one side You may set as (refer FIG. 6).
- the film transfer mechanism 30 moves the cover film 110 just above the two opposite rows during temporary compression bonding to the three rows on one side, and temporarily crimps the three rows on one side.
- the moving block 34 is slid to move the cover film 110 directly above the three opposing rows.
- interference between the cover film 110 and the mounting head 12 is prevented by separating the cover film 110 from the mounting section 106 to be temporarily crimped during the temporary pressure bonding process, so that the semiconductor chip 100 is prevented. Can be temporarily crimped properly.
- the control unit 20 causes the mounting head 12 to carry out the main crimping process. Specifically, the mounting head 12 sequentially applies pressure and heat to the substrate 104 to perform main pressure bonding on the semiconductor chip 100 temporarily pressure-bonded.
- the numbers attached to the respective semiconductor chips 100 in FIG. 7 and FIG. 8 indicate the order of the main pressure bonding. In the illustrated example, the main pressure bonding is started from the lower left corner as in the temporary pressure bonding, and then advanced in a zigzag manner while reversing the traveling direction for each row.
- the control unit 20 drives the film moving mechanism 30 to move the cover film 110 to the intermediate position.
- the intermediate position is a position directly above the semiconductor chip 100 to be fully crimped and between the semiconductor chip 100 and the mounting head 12.
- the cover film 110 is interposed between the semiconductor chip 100 and the mounting head 12 as shown in FIG. And thereby, adhesion to the mounting head 12 of the adhesive material 108 which has crawled up and the penetration
- the semiconductor chip 100 subjected to the main pressure bonding changes sequentially. Therefore, the position of the cover film 110 also has to be sequentially changed in accordance with the progress of the pressure bonding process.
- the cover film 110 is stretched so as to cover one row (three pieces) of semiconductor chips 100 (mounting section 106). Therefore, the film moving mechanism 30 does not move the cover film 110 until the main pressure bonding of one row (three pieces) of the semiconductor film 100 located immediately below the cover film 110 is finished, and the film moving mechanism 30 moves directly below the cover film 110.
- the cover film 110 is moved right above the next adjacent row. According to the example of FIGS.
- the film moving mechanism 30 mounts the cover film 110 in the second row. Position it directly above the compartment 106.
- the film moving mechanism 30 positions the cover film 110 right above the mounting section 106 in the first row from the drawing as shown in FIG. .
- the film delivery mechanism 24 feeds the cover film 110. Specifically, the film delivery mechanism 24 feeds the cover film 110 by a distance corresponding to one row of the mounting sections 106 when the final crimping of the semiconductor chips 100 for one row is completed.
- the position P1 on the cover film 110 is located near one end of the row of the mounting sections 106, and the position P2 on the cover film 110 is located near the other end of the row. The distance from the position P1 to the position P2 is one feed distance.
- cover film 110 When the semiconductor chip 100 is heated and pressed with the mounting head 12 via the cover film 110, the cover film 110 is in close contact with the upper surface of the semiconductor chip 100 as shown in FIG. A portion of material 108 contacts cover film 110. If the cover film 110 is in close contact with the upper surface of the semiconductor chip 100, the cover film 110 can not be fed properly.
- the cover film 110 may be lifted and lowered by the film lifting mechanism as needed. Specifically, when the semiconductor chip 100 is fully crimped, as shown in FIG. 9A, the cover film 110 is moved by the film lifting mechanism so that the cover film 110 is at substantially the same height position as the upper surface of the semiconductor chip 100. Let down. Further, when feeding the cover film 110, as shown in FIG. 9B, the cover film 110 is lifted by the film lifting mechanism so that the cover film 110 is separated from the upper surface of the semiconductor chip 100.
- a process of arranging the cover film 110 at an appropriate position is required each time the main pressure bonding to the mounting section 106 for one row is completed.
- the process of arranging the cover film 110 includes the elevation of the cover film 110, the feed of the cover film 110, the horizontal movement of the cover film 110, and the lowering of the cover film 110. Of these processes, the feed of the cover film 110 and the horizontal movement may be performed in parallel.
- the film placement mechanism 18 is provided on the base 16 as is apparent from the above description.
- the cover film 110 is disposed so as to cover the upper sides of the plurality of mounting sections 106 simultaneously. The reason for this configuration will be described in comparison with the prior art.
- FIG. 17 is a diagram showing an example of such a conventional mounting apparatus 10.
- many of the conventional mounting apparatuses 10 have provided the cover film 110 on the mounting head 12. That is, the feed roller 28 for feeding the cover film 110 is attached to the mounting head 12. In this case, the weight of the mounting head 12 that requires high-speed and high-precision movement is increased, causing a problem of increasing the size and cost of the moving mechanism that moves the mounting head 12.
- the cover film 110 in the case of a configuration in which the cover film 110 is attached to the mounting head 12, the cover film 110 always covers the bottom surface of the mounting head 12. In this case, since the suction holes 22 of the mounting head 12 are covered with the cover film 110, the semiconductor chip 100 can not be held by suction via the suction holes 22. Therefore, in the conventional mounting apparatus 10, before the suction holding of the semiconductor chip 100, the hole is formed in the portion of the cover film 110 corresponding to the suction hole 22 using a needle 70 or the like. Further, in the case of the configuration in which the cover film 110 is attached to the mounting head 12, it is necessary to feed the cover film 110 every time the main pressure bonding to one semiconductor chip 100 is finished. Since such hole-piercing and feed processes are time-consuming, the tact time is increased.
- the time required for the hole drilling process and the feed process is several times to 10 times longer.
- such a drilling process occurs, and the number of feed processes increases, resulting in an increase in the tact time of semiconductor device manufacture.
- the film placement mechanism 18 is installed on the base 16 as described above.
- the mounting head 12 can be reduced in weight, and the mounting head 12 can be moved at high speed and with high accuracy even with a relatively small and inexpensive moving mechanism.
- the cover film 110 and the mounting head 12 can be separated. Therefore, the semiconductor chip 100 can be suctioned and held by the mounting head 12 without opening the hole in the cover film 110. As a result, the time-consuming drilling process becomes unnecessary, and tact time can be significantly reduced. Moreover, since the complicated mechanism for drilling can be eliminated, the price of the mounting apparatus 10 can also be reduced.
- the cover film 110 covers the plurality of semiconductor chips 100 during the main pressure bonding process. Therefore, the number of times of feeding of the cover film 110 can be significantly reduced as compared with the prior art, and consequently, the tact time can be significantly reduced.
- FIG. 10 is a diagram showing an example of a time chart in the case of mounting the semiconductor chip 100 in an arrangement of 3 rows and 5 columns.
- Condition 1 and Condition 2 show a time chart in the conventional mounting apparatus 10
- Condition 3 shows a time chart in the mounting apparatus 10 disclosed in the present specification.
- the time required for bonding (temporary pressure bonding or full pressure bonding) of one semiconductor chip 100 is 1 second
- the time required for the hole formation of the cover film 110 is 3 seconds
- the time required for the feed of the cover film 110 is 2 It is said to be seconds.
- temporary compression bonding is illustrated by thin ink, final compression by dark ink, perforation by diagonal hatching, and feed by cross hatching.
- Condition 1 in FIG. 10 shows a time chart in this procedure. In this case, each time the semiconductor chip 100 is fully crimped, it is necessary to make holes (diagonally hatching) and feeds (cross hatching) of the cover film 110. Therefore, the time for the entire implementation process becomes very long.
- Condition 2 in FIG. 10 shows a time chart in this procedure.
- the total time required for the hole formation (diagonal hatching) as compared to the first-step procedure. Can be significantly reduced.
- the feed (cross hatching) of the cover film 110 is required every time one semiconductor chip 100 is fully crimped. In other words, the feed of the cover film 110 is required the same number of times as the number of semiconductor chips 100. As a result, the overall implementation process time can not be significantly reduced.
- the perforation (diagonal hatching) of the cover film 110 is completely unnecessary. Further, the cover film 110 simultaneously covers a plurality of (three in this example) mounting sections 106. Therefore, it is sufficient to feed the cover film 110 (cross hatching) every time the main pressure bonding is performed three times.
- the number of mounting sections 106 that the cover film 110 simultaneously covers is N
- the number of times of feeding of the cover film 110 is (total number of mounting sections 106 / N). That is, according to this example, the number of times of feeding of the cover film 110 can be significantly reduced as compared with the prior art, and consequently, the overall time of the mounting process can be significantly reduced.
- the number N of the mounting sections 106 covered by the cover film 110 that is, the number N of the mounting sections 106 aligned in a line in the substrate 104 is three.
- the number N of mounting sections 106 aligned in a row in the substrate 104 is often greater. As the number N is larger, the number of times of feeding is reduced, so that it is understood that the effect of shortening the tact time is higher as the substrate 104 is larger and the number of mounting sections 106 is larger.
- the bonding stage 14 or the base 16 supporting the bonding stage 14 is provided with the film placement mechanism 18 for placing the cover film 110 at an appropriate position as necessary.
- the other configurations may be changed as appropriate.
- the film elevating mechanism for moving the cover film 110 up and down is provided in order to contact / separate the cover film 110 and the upper surface of the semiconductor chip 100.
- the film lifting mechanism may not be necessary.
- the elasticity of the cover film 110 may be used to return the cover film 110 from the state in contact with the semiconductor chip 100 to the separated state. Specifically, as shown in FIG.
- the cover film 110 is stretched at a height position spaced apart from the top surface of the semiconductor chip 100. Then, at the time of the full pressure bonding, as shown in FIG. 11A, the cover film 110 is bent by being pressed by the mounting head 12 and contacts the upper surface of the semiconductor chip 100. At this time, if the cover film 110 has sufficient elasticity (stiffness) and appropriate tension is applied, when the pressing by the mounting head 12 is released, the cover film 110 is bent before being flexed by an elastic restoring force. Automatically, i.e., being separated from the semiconductor chip 100. Then, in this state, the cover film 110 may be fed. With this configuration, it is not necessary to raise and lower the cover film 110 each time the feed is performed, and control of the mounting process can be further simplified.
- the interference member 40 that interferes with a part of the cover film 110 that is bent downward by being pressed by the mounting head 12 is provided. Good.
- the interference member 40 is required to interfere with part of the cover film 110 that is bent downward, but not to interfere with the mounting head 12 that descends toward the semiconductor chip 100. Therefore, as the interference member 40, for example, as shown in FIG. 12A, it is possible to use a substantially ladder-like member in which rectangular holes 42 larger than the bottom surface of the mounting head 12 are formed at the disposition intervals of the mounting sections 106. . When such an interference member 40 is provided, as shown in FIG.
- the cover film 110 pressed by the mounting head 12 is bent more sharply than in the case where the interference member 40 is not provided, and the elastic restoring force Works harder. As a result, the cover film 110 is more reliably separated from the semiconductor chip 100.
- the shape of the interference member 40 shown to FIG. 12A and FIG. 12B is an example, and, of course, may be another shape.
- the width of the cover film 110 is the width of one row of the mounting sections 106 in the above description, the width of the cover film 110 may be larger.
- the cover film 110 may have a width of two rows of mounting sections 106.
- the film delivery mechanism 24 hooks the cover film 110 so that the cover film 110 covers the two-dimensional array of mounting sections 106 in units of rows. It is desirable to deliver.
- the mounting apparatus 10 disclosed herein may be applied to a chip on wafer (CoW) that bonds the semiconductor chip 100 to a substantially circular wafer.
- CoW chip on wafer
- the number of mounting sections 106 that can be covered by the cover film 110 changes at the same time.
- the feed distance of the cover film 110 may be changed according to the horizontal position of the cover film 110 (the number of mounting sections 106 that can be covered simultaneously). With this configuration, the loss of the cover film 110 can be reduced.
- the feed distance of the cover film 110 may be fixed to the maximum value, that is, the diameter of the substrate 104. In this case, although the cover film 110 to be wound is increased without being used, the feed control of the cover film 110 can be simplified.
- the substrate 104 is a mounted body for the first stage semiconductor chip 100
- the first stage semiconductor chip 100 is the mounting body for the second stage semiconductor chip 100.
- a temporary laminated body 120 in which a plurality of semiconductor chips 100 are stacked while being temporarily pressure bonded in the thickness direction is formed in each mounting section 106.
- the upper surface of the temporary stack 120 is heated and pressurized by the mounting head 12 so that the plurality of semiconductor chips 100 constituting the temporary stack 120 are full pressure bonded in a batch.
- the cover film 110 is retracted to the retracted position at the time of temporary pressure bonding, and at the time of main pressure bonding, the cover film 110 is used as the semiconductor chip 100 to be fully pressure bonded and the mounting head 12. It may be placed at an intermediate position between
- FIG. 16 is a view showing an example of the mounting apparatus 10 in which the bonding stage 14 moves horizontally.
- the bonding stage 14 includes an XY table 48 that allows movement in the first direction (longitudinal direction of the substrate 104) and movement in the second direction (shorter direction of the substrate 104).
- the control unit 20 drives the XY table 48 to horizontally move the bonding stage 14 such that the mounting section 106 to be subjected to temporary pressure bonding and full pressure bonding is positioned immediately below the mounting head 12.
- the mounting head 12 temporarily presses or fully crimps the semiconductor chip 100 in the mounting section 106 by being lowered directly below.
- the mounting head 12 since the mounting head 12 only moves up and down and does not move horizontally, it is desirable to provide the mounting head 12 with a supply mechanism 50 for supplying a new semiconductor chip 100 and the like. Also, in this case, it is desirable that the film placement mechanism 18 be installed on the bonding stage 14 so that it can move horizontally in conjunction with the substrate 104.
- the mounting apparatus 10 disclosed by this specification is not limited to the pre-coating system, but via the adhesive material 108 As long as the semiconductor chip 100 is mounted on a mounting target, it may be applied to another bonding method.
- an adhesive called a DAF die attach film
- the DAF may be heat-cured to mount the semiconductor chip 100 on the object .
- the cover film 110 between the semiconductor chip 100 and the mounting head 12 it is possible to effectively prevent the fume gas from entering the mounting head 12.
- SYMBOLS 10 mounting apparatus 12 mounting head, 14 bonding stage, 16 base, 18 film arrangement mechanism, 20 control part, 22 suction hole, 24 film delivery mechanism, 28a delivery roller, 28b take-up roller, 30 film moving mechanism, 40 interference Members, 42 rectangular holes, 48 XY tables, 50 supply mechanisms, 70 needles, 100 semiconductor chips, 102 bumps, 104 substrates, 105 electrodes, 106 mounting sections, 108 adhesive materials, 110 cover films, 120 temporary laminates.
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Abstract
Description
Claims (7)
- 半導体チップを接着材料を介して基板または他の半導体チップである被実装体に実装する実装装置であって、
前記基板が載置されるボンディングステージと、
前記ボンディングステージを支える基台と、
前記半導体チップを吸引保持して前記被実装体に仮圧着する仮圧着処理と、前記仮圧着された半導体チップを本圧着する本圧着処理と、を行う実装ヘッドと、
前記ボンディングステージまたは前記基台に設けられ、前記本圧着処理時に、前記仮圧着された半導体チップと前記実装ヘッドとの間にカバーフィルムを介在させるフィルム配置機構と、
前記実装ヘッドおよび前記フィルム配置機構の駆動を制御する制御部と、
を備え、
前記フィルム配置機構は、
前記カバーフィルムが掛け渡された一対のローラを有し、順次、新たなカバーフィルムを送り出すフィルム送出機構と、
前記カバーフィルムを、前記基板に対して水平方向に移動させるフィルム移動機構と、
を備える、ことを特徴とする実装装置。 - 請求項1に記載の実装装置であって、
前記制御部は、前記カバーフィルムが、前記仮圧着処理時には、前記半導体チップが仮圧着される実装区画から水平方向に離間した退避位置に位置し、前記本圧着処理時には、本圧着対象の半導体チップの真上である仲介位置に位置するように、前記フィルム移動機構を制御する、ことを特徴とする実装装置。 - 請求項2に記載の実装装置であって、
前記フィルム送出機構は、前記仲介位置において、前記カバーフィルムが複数の実装区画の上方を覆うように、前記カバーフィルムを掛け渡しており、
前記制御部は、前記カバーフィルムが覆う前記複数の実装区画全てにおいて前記半導体チップの本圧着が終了すれば、前記フィルム移動機構を駆動して前記カバーフィルムが新たな複数の実装区画の上方を覆う位置に移動させるとともに、前記フィルム送出機構を駆動して前記カバーフィルムを前記複数の実装区画に応じた距離だけフィードさせる、
ことを特徴とする実装装置。 - 請求項3に記載の実装装置であって、
前記基板には、半導体チップを実装する実装区画が二次元アレイ状に規定されており、
前記フィルム送出機構は、前記二次元アレイ状の実装区画を、列単位で覆うように、前記カバーフィルムを掛け渡している、
ことを特徴とする実装装置。 - 請求項1から4のいずれか1項に記載の実装装置であって、
前記制御部は、前記実装ヘッドに、複数の前記実装区画において前記半導体チップの仮圧着を連続して実行させた後、前記仮圧着された複数の前記半導体チップの本圧着を連続して実行させる、ことを特徴とする実装装置。 - 請求項1から5のいずれか1項に記載の実装装置であって、
前記フィルム配置機構は、さらに、前記カバーフィルムを、前記ボンディングステージに対して昇降させる昇降機構を備える、ことを特徴とする実装装置。 - 請求項1から6のいずれか1項に記載の実装装置であって、
前記フィルム送出機構は、前記実装ヘッドにより押圧されて下方に撓んだ前記カバーフィルムの一部と干渉することで、前記撓みの解消を支援する干渉部材を備える、ことを特徴とする実装装置。
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US16/768,694 US11664344B2 (en) | 2017-12-01 | 2018-11-28 | Mounting apparatus |
CN201880072856.6A CN111344848A (zh) | 2017-12-01 | 2018-11-28 | 封装装置 |
JP2019557260A JP6787613B2 (ja) | 2017-12-01 | 2018-11-28 | 実装装置 |
SG11202006294RA SG11202006294RA (en) | 2017-12-01 | 2018-11-28 | Mounting apparatus |
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US20210175201A1 (en) | 2021-06-10 |
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