JP2002043345A - Method of manufacturing semiconductor device and resin- sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable semiconductor device which can resin-seal one side of a molded product reliably without generating resin burrs. SOLUTION: In this method of manufacturing a semiconductor device, a substrate on which a plurality of semiconductor chips and/or circuit components are mounted on one side thereof is molded. This molded article is clamped by an upper mold 20 and a lower mold 21 to resin-seal the one side, on which semiconductor chips, etc., are mounted. A mold is used wherein cavity depressed portions 26a are partitioned and formed individually in one mold surface of the upper mold or lower mold for resin-sealing the molded article 16, by partitioning portions corresponding to each resin-sealed regions. A release film 40 for stripping the mold and a sealing resin easily is provided on the surface of the other mold over a range covering a flat surface region of the molded article. The molded article 16 is placed in the mold and clamped via the release film. A resin is filled in each cavity formed by pressing and contacting an end surface of the partitioning portions on a surface of the substrate via the release film to resin-seal the substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a semiconductor device and a resin sealing apparatus, and more particularly, to a method of molding a molded article having a large number of semiconductor chips mounted on a substrate by one-side resin sealing. The present invention relates to a method for manufacturing a semiconductor device as a semiconductor device and a resin sealing device. The present invention relates to a method for manufacturing a semiconductor device in which a semiconductor wafer is sealed on one side with a resin to form a semiconductor device, and a resin sealing device used for the method.

[0002]

2. Description of the Related Art As a method of manufacturing a resin-encapsulated semiconductor device, as shown in FIG.
After the resin 14 is cured, the resin 12 and the substrate 12 are arranged in accordance with the arrangement position of each semiconductor chip 10.
And cut with a dicing saw or laser,
There is a method of obtaining individual semiconductor devices by this. According to this method of manufacturing a semiconductor device, the semiconductor chips 10 can be arranged at a high density, which is effective in efficiently producing a very small semiconductor device, and effectively reduces the manufacturing cost of the semiconductor device. Is possible.

[0003]

However, as described above, the method of separating the substrate 12 in which the entire surface on which the semiconductor chip 10 is mounted with resin and sealing it with a resin to obtain a semiconductor device is as follows. There is a problem. That is, in the case of the method of cutting into individual pieces using a dicing saw, since a material of different materials such as the resin 14 and the substrate 12 is diced, the dicing blade is easily damaged, and chipping or cracking is easily caused in the cut portion. In the case of separation using a laser, cutting takes time. In addition, the semiconductor chip 1
In the case of using the potting method when sealing the resin 0, it takes time until the resin 14 is cured, which is not efficient. In addition, when resin sealing is performed by the transfer sealing method, wire flow or the like occurs, and accurate resin sealing cannot be performed. Further, there is a problem that the molded product warps because the entire surface on which the semiconductor chip 10 is mounted is simply sealed with resin.

The present invention has been made to solve these problems, and an object of the present invention is to form a substrate in which a large number of semiconductor chips are arranged vertically and horizontally as a molded product and seal one surface of the substrate with a resin. It is an object of the present invention to provide a preferable manufacturing method of a semiconductor device which is stopped and used as a semiconductor device, and a resin sealing device to which the manufacturing method is applied.

[0005]

The present invention has the following arrangement to achieve the above object. That is, a substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one surface is used as a molded product, and the molded product is clamped with an upper mold and a lower mold, and the one surface on which a semiconductor chip or the like is mounted is placed on the one surface. In a method of manufacturing a semiconductor device in which resin molding is individually performed in accordance with a mounting position of a semiconductor chip or the like, the upper mold or the lower mold is molded on one mold surface with resin, and In accordance with each resin sealing area, using a mold formed by individually dividing the cavity recessed by the partition portion, in a state where the mold is opened, the mold surface of the one mold, the mold of the molded product Over the range covering the plane area, supply a release film that easily peels off the mold and the sealing resin, arranges the molded article in the mold, clamps the molded article via the release film, Via the release film The end face of the partition portion is characterized in that the resin sealing by filling a resin into the cavity formed by being pressed against the surface of the substrate Te. Further, after supplying the release film to the mold surface of the one mold, air is sucked from the inner bottom surface side of the cavity recess to adsorb the release film to the inner surface of the cavity recess, and the release film is placed in the cavity recess. The molded article is placed in a mold while being adsorbed on the mold.

Further, a substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one side is used as a molded article, and the molded article is clamped by an upper mold and a lower mold to mount a semiconductor chip or the like. In a method of manufacturing a semiconductor device in which one surface is resin-encapsulated corresponding to a mounting position of the semiconductor chip or the like, the upper mold or the lower mold is resin-sealed on one mold surface, and Using a mold in which cavity recesses are individually formed by partitioning plates movable in the mold opening / closing direction in accordance with the respective resin sealing regions in the above, and the mold of the one mold is opened in a mold opened state. Supplying a release film that easily peels off the mold and the sealing resin over a range covering the plane area of the molded article on the mold surface, disposing the molded article in the mold, Clamps the workpiece through After filling the cavity between the mold surface of the mold and the substrate with resin, the partition plate is pushed in the mold opening / closing direction and aligned with each resin sealing area on the substrate via the release film. And resin sealing. Further, when the partition plate is pushed in the mold opening / closing direction, an end surface of the partition plate is pressed against the surface of the substrate via the release film to perform resin sealing.

Further, a substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one surface is used as a molded article, and the molded article is clamped by an upper mold and a lower mold to mount a semiconductor chip or the like. In the method of manufacturing a semiconductor device in which one surface is individually resin-sealed corresponding to a mounting position of the semiconductor chip or the like, a cavity is formed by a partition part as a lower die in accordance with each resin sealing region on the substrate. Using molds formed individually, with the mold opened and the lower mold lowered from the clamp position, on the mold surface of the mold, over a range covering the planar area of the molded article, Supplying a release film that easily peels off with a mold and a resin for sealing, and the lower mold covered with the release film,
Supplying a required amount of resin, moving the lower mold upward, and clamping the molded product via a release film with the upper mold and the lower mold, thereby forming the partition portion via the release film. Each cavity formed by pressing the end face against the surface of the substrate is filled with a resin and sealed with the resin.

In addition, a substrate having a plurality of semiconductor chips and / or circuit components mounted on one surface is used as a molded product, the molded product is clamped by an upper mold and a lower mold, and resin is fed from a pot to a cavity. Then, in a resin sealing device for resin-sealing one surface of the substrate for each resin sealing region corresponding to the mounting position of the semiconductor chip or the like, the upper or lower die is molded with resin. On one mold surface, in accordance with each resin sealing area on the substrate, the cavity recesses were individually formed by partitioning portions whose end faces pressed against the resin sealing surface of the substrate during resin sealing. Set up a mold,
With the mold open, a release film that supplies a release film that is easily peeled off from the mold and the sealing resin to the mold surface of the one mold in a range that covers the plane area of the molded article. And a suction hole for sucking air into the one mold from the inner bottom surface side of the cavity recess and adsorbing the release film supplied to the mold surface of the mold to the inner surface of the cavity recess. Is provided in communication with the air suction mechanism. Also, in the one mold,
An end face side of the partition portion is notched to provide a runner path communicating with an adjacent cavity concave portion.

Also, a substrate having a plurality of semiconductor chips and / or circuit components mounted on one surface is used as a molded product, the molded product is clamped by an upper mold and a lower mold, and resin is pressure-fed from a pot to a cavity. Then, in a resin sealing device for resin-sealing one surface of the substrate for each resin sealing region corresponding to the mounting position of the semiconductor chip or the like, the upper or lower die is molded with resin. The cavity recesses are individually formed on one mold surface by a partition plate that is movably supported in the mold opening and closing direction and whose end surface presses the surface of the substrate to be sealed with the resin, in accordance with the respective resin sealing regions. A mold that is formed separately is provided, and in a state where the mold is opened, on the mold surface of the one mold, in a range that covers the plane area of the molded article, the mold and the resin for sealing are used. Lily supplies release films that release easily Characterized in that a supply mechanism of the film.

In addition, a substrate having a plurality of semiconductor chips and / or circuit components mounted on one surface is used as a molded article, and a required amount of sealing resin is applied to the lower mold while the lower mold is lowered from the clamp position. After the supply, the molded article is clamped by an upper mold and a lower mold, and in a resin sealing device for resin-sealing one surface of the substrate for each resin sealing region corresponding to the mounting position of the semiconductor chip or the like, As the lower mold, cavity recesses are individually formed by partitioning portions whose end faces press against the surface of the substrate to be resin-sealed during resin-sealing, in accordance with each resin-sealed region to be an individual semiconductor device. In a state in which the mold is opened, the mold is opened, and the lower mold is lowered from the clamp position, the mold and the sealing are provided on the mold surface of the mold so that the flat area of the molded article is covered. Supplying a release film that easily peels off the resin Characterized in that a feed mechanism Sufirumu. Further, the upper and lower dies are opened and closed in a direction inclined with respect to a vertical line. Further, a clamper is provided on the outer periphery of the lower mold, the clamper being movable in the mold opening and closing direction, and having an end surface protruding from a mold surface of the lower mold when the mold is opened. Further, the clamper is provided with an air suction hole for suctioning the release film on the end face of the clamper by air suction of the release film, and the release mold is suctioned on the lower mold by air, and is surrounded by the lower mold and the clamper. An air suction mechanism for covering the inner surface of the recess with a release film is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a semiconductor device according to the present invention and a resin sealing device to which the method is applied will be described in detail with reference to the accompanying drawings. 1 and 2 show a configuration of a mold used in a resin sealing device of a semiconductor device according to the present invention and a method of resin sealing using the resin sealing device.
Reference numeral 16 denotes a molded product in which the semiconductor chip 10 is mounted on the substrate 12. The molded article 16 is one in which the semiconductor chips 10 are arranged on the substrate 12 at regular intervals in the vertical and horizontal directions. The embodiment is an example of manufacturing a multi-chip module constituting one semiconductor device by using two semiconductor chips 10 as a unit. Of course, the present invention can be applied to a case where a single semiconductor chip 10 is mounted on each semiconductor device, a case where three or more semiconductor chips 10 are mounted, a case where circuit components such as resistors other than the semiconductor chip 10 are mounted, and the like. is there.

The molded article 16 includes an upper mold 20 and a lower mold 21 of a mold.
From the pot 24 and the cavity 2
6 is filled with resin and sealed with resin. Reference numeral 22 denotes a plunger for feeding resin. In this embodiment, the lower mold 21 is provided with the cavity concave portion 26a, and the surface of the molded product 16 on which the semiconductor chip 10 is mounted faces downward.
6 is set. It is also possible to provide a cavity recess in the upper die 20 so that the mounting surface of the molded product 16 on which the semiconductor chip 10 is mounted faces upward and performs resin sealing.

FIG. 3 is a perspective view of the lower mold 21. Lower mold 21
A rectangular cavity 26a is formed in accordance with the position of the semiconductor chip 10 mounted on the substrate 12. Numeral 28 is a partition for partitioning the adjacent cavity concave portion 26a. In the embodiment, the partition portion 28 is formed in a lattice frame shape to form the cavity concave portion 26a divided into a rectangular shape. The upper end surface of the partition part 28 is formed at a uniform height, and serves as a parting surface of the mold.

Reference numeral 30 denotes a runner path communicating between adjacent cavities 26. The runner path 30 is a partition 28
Are formed by partially cutting out the adjacent cavities 26.
Communicate with each other via the runner path 30. In the embodiment, the cavity concave portions 26a arranged in the longitudinal direction
The runner paths 30 were arranged so as to communicate with each other. Figure 1
2 shows a cross section of the lower mold 21 cut at a portion where the runner path 30 passes.

The resin sealing device of the present embodiment is a molded product 16
Is clamped by the upper mold 20 and the lower mold 21 to seal the resin. The resin molding surface of the lower mold 21 is covered with the release film 40 so that the sealing resin does not directly contact the resin molding surface. It is characterized by resin sealing. The release film 40 has a predetermined heat resistance that can withstand the heating temperature of the mold and is easily peeled from the mold. For example, PTFE, ETFE, PET, FE
P film and the like can be used. Also, the cavity recess 26
A flexible and extensible material that easily deforms according to the inner shape of the resin sealing portion such as a is used. Further, a resin which is easily peeled off from the cured resin after the resin sealing is used.

In the actual sealing mold, the lower mold 21 is disposed on both sides of the pot 24. FIG. 1 shows a lower mold 21 on one side. Of course, the lower mold 21 may not be disposed on both sides of the pot 24, but may be disposed on only one side of the pot 24. The dimensions of the lower mold 21 and the number of cavity recesses 26a provided in the lower mold 21 are appropriately designed in accordance with the molded article 16. FIG. 1 shows a state in which the release film 40 is set in the lower mold 21 and the pot 24 by opening the mold. As shown in the figure, the release film 40 is provided between the inner surface of the pot 24 and the lower mold 21.
Is disposed so as to cover the entire resin sealing surface of the above.

The release film 40 is loaded onto the sealing mold so as to cover the resin sealing portion of the sealing mold in accordance with the resin sealing operation. When setting the release film 40, it may be simply put on the resin sealing surface of the sealing mold, but as shown in FIG. 1, air is sucked from the inner bottom surface side of the cavity concave portion 26a, and the inner surface of the cavity concave portion 26a is It is good to adsorb the release film 40 according to the shape. Reference numeral 32 denotes a suction hole for sucking the release film 40 by air. The suction hole 32 is opened in a slit shape on the inner bottom surface of the cavity concave portion 26a, for example, and is provided in communication with an air suction mechanism outside the sealing mold.

Since the release film 40 has flexibility, the air is easily sucked into the cavity concave portion 26a by sucking air from the suction hole 32. Thereby, the cavity 2 for accommodating the molded article 16
6 are formed. Pot 24
The release film 40 is suctioned by air along the inner surface of the recess formed by the inner peripheral surface of the pot 24 and the upper end surface of the plunger 22 by suctioning air from the inside of the pot.

A release film 40 is provided on the inner surface of the pot 24.
Air is sucked from below the pot 24 by using a gap between the inner peripheral surface of the pot 24 and the outer peripheral surface of the plunger 22 as an air flow path, and is vertically communicated with the outer peripheral surface of the plunger 22. There is a method in which a groove is formed, and air is suctioned using the groove portion as an air flow path. Since the inner surface of the pot 24 is covered with the release film 40, the pot 2
No molten resin adheres to the inner surface of No. 4.

After the release film 40 is adsorbed on the resin sealing surface of the lower mold 21 and the pot 24 by air, a resin tablet 34 is supplied to the pot 24 and the molded product 16 is moved to the lower mold 21.
Set to a predetermined position. As the sealing resin to be supplied to the pot 24, in addition to the resin obtained by solidifying the resin into a tablet shape, a granular resin, a powdery resin, a liquid resin,
Sheet-like resin and jelly-like resin can be used. Also,
It may be a thermosetting resin or a thermoplastic resin.

Next, the molded article 16 is divided into the upper mold 20 and the lower mold 2.
1 and the resin 34a melted in the pot 24
Is pumped by the plunger 22 to fill the cavity 26 with the resin 34a. FIG. 2 shows resin 34 in cavity 26.
a is filled. The resin 34a is charged in order from the cavity 26 located closer to the pot 24 to the cavity 26 farther away. The runner path 30 communicates between the adjacent cavities 26 and
It becomes a flow path for filling a. After all the cavities 26 are filled with the resin 34a from the pot 24 in this manner,
The pressure is maintained to cure the resin 34a.

After the resin 34a is cured, the mold is opened, and the resin-sealed molded product is taken out from the sealing mold. After removing the molded product from the mold with the release film 40 attached to the sealing resin, the release film 40 is peeled and removed, or after the molded product is peeled from the release film 40 in the sealing mold. , Molded products and release film 40
Separately out of the mold.

FIG. 4 is a perspective view of the molded product after resin sealing. Rectangular resin sealing portions 36 are arranged on the substrate 12 in a vertical and horizontal arrangement at a constant interval. Adjacent resin sealing part 3
Resin does not remain in the intermediate portion of 6, and the substrate 12 is exposed. 30a is a resin cured in the runner path 30 and is a substrate 1
2 and remains.

The semiconductor device is obtained by dividing the substrate 12 for each individual resin sealing portion 36. In the figure, line A-A indicates the substrate 12
The above one separation line, BB line, shows the other separation line orthogonal to this. The molded product obtained by the resin sealing device of the present embodiment is a resin 30a cured in the runner path 30.
Are partially left, but the intermediate region of the adjacent resin sealing portion 36 is only the substrate 12. By dividing only the substrate 12, it is possible to easily obtain a singulated semiconductor device.

According to the method in which only the substrate 12 is divided into a semiconductor device as described above, the division can be performed very easily without damaging the blades even when dividing using a dicing saw. In order to facilitate the dividing operation by the dicing saw, if the slit 12 is provided in advance in the portion where the dicing saw passes except for the portion where the runner path 30 passes, the substrate 12 can be further efficiently divided. Can be. Alternatively, an individual semiconductor device can be obtained by using the substrate 12 provided with a notch in advance in accordance with the dividing line of the substrate 12 and dividing the substrate 12 at the notch portion after resin sealing.

As in this embodiment, the release film 40
Is advantageous in that the molded article 16 can be securely clamped and accurate resin sealing can be performed. When the substrate 12 of the molded article 16 is a resin substrate, it is inevitable that the thickness of the substrate 12 has a slight variation. However, release film 40
If it clamps through, the resin 12 can be reliably sealed without absorbing the variation in the thickness of the substrate 12 and leaving resin burrs on the surface of the substrate 12.

Further, when the molded product is released from the mold, it is a conventional method to use an ejector pin to protrude the resin molded portion with the ejector pin when the mold is opened. If the release film 40 is used, the mold can be released without using the ejector pins, and there is an advantage that it is not necessary to form a complicated mold structure such as disposing the ejector pins inside the sealing mold.

Further, by covering the inner surface of the resin sealing portion of the sealing mold with the release film 40, the cavity 2 is formed.
6, the flowability of the resin on the inner surface becomes good, and the cavity 2
6 is easily filled with the resin 34a.
A void can be prevented from being formed inside 6 and resin sealing can be reliably performed. Further, since the flowability of the resin 34a in the cavity 26 is improved, the resin sealing portion 36
It is possible to easily form an extremely thin package having a thickness of 0.1 mm.

In connection with the flowability of the resin in the cavity 26, the conventional resin sealing device uses a resin which is easy to release after resin sealing in consideration of the releasability of a molded product. However, when the release film 40 is used as in the present embodiment, since the resin does not come into contact with the sealing mold, only the filling property of the resin into the cavity 26, the electrical characteristics of the semiconductor device, and the like are reduced. The resin can be selected taking into account.

As a method of sealing the resin using the release film 40, the parting surface and the resin molding surface of both the upper mold 20 and the lower mold 21 are covered with the release film 40 as shown in FIG. You may make it resin-sealed. Further, a configuration in which the pot 24 is disposed on the substrate surface of the molded product 16 and sealed with resin can also be adopted. FIG.
As shown in (2), a step 20a having the same thickness as the substrate of the article 16 can be provided in the upper die 20, and the article 16 can be accommodated in the step 20a and sealed with resin.

In the lower mold 21 used in the resin sealing device of the above-described embodiment, a runner path 28 is provided in a partition portion 28 to communicate with an adjacent cavity 26. However, the resin cured in the runner path 28 In order not to leave it on the top, for example, a sealing mold as shown in FIG. 7 may be used. The sealing mold shown in FIG. 7 has a cavity concave portion 26a in the form of a rectangular frame by a partition portion 28 in the same manner as the lower mold 21 described above.
The partition part 28 connecting the adjacent cavities 26 is formed as a vertically movable partition plate 28a, and the partition plate 28a is vertically driven.
8 is supported.

FIG. 7 shows the release film 4
In this state, the upper mold 20 and the lower mold 21 are clamped through the mold 0, and the resin 34a is filled in the cavity 26 from the pot 24. When the resin 34a is filled into the cavities 26 in this manner, the upper end surface of the partition plate 28a is separated from the surface of the substrate 12, and the communication paths 31 for connecting the adjacent cavities 26 to each other are formed. The resin 34a can be filled. When the resin 34a has been filled in all the cavities 26, the support plate 38 is moved upward, and the upper end surface of the partition plate 28a is brought into contact with the substrate 12, whereby the individual cavities 2
6 can be completely partitioned.

If resin sealing is performed by such a method,
The resin did not remain after the resin sealing at the portion of the communication path 31 that had communicated the cavity 26 with each other on the substrate 12, and the resin sealing portion 36 was completely separated on the substrate 12 as shown in FIG. A molded article can be obtained. Thus, the resin sealing portion 3
The operation of separating the substrate 12 into individual pieces is further facilitated if the individual elements 6 are formed completely separately. When the partition plate 28a is used, air can be sucked from the vertically moving holes for vertically moving the partition plate 28a by the lower mold 21, and the release film 40 can be sucked in air along the cavity concave portion 26a. It is not necessary to provide a separate suction hole.

In each of the above embodiments, the lower mold 21
The resin is sealed using a mold provided with the cavity concave portion 26a, but the resin can be similarly sealed when using a mold provided with the cavity concave portion 26a in the upper mold 20.
When the cavity 20a is provided in the upper mold 20, the upper mold 2
A resin path communicating with the cavity 26 may be provided at 0.

FIG. 9 shows that each cavity recess 2
6 shows a sealing mold in which 6a is completely partitioned. In the above-described embodiment, the adjacent cavities 26 are communicated by providing the runner paths 30 in the partition portions 28 or by making the partition plates 28a movable. However, as in this example, a fixed partition having no runner paths 30 is provided. It is also possible to perform resin sealing using a sealing mold in which the cavity concave portion 26a is formed in the portion 28.

FIG. 10 shows an embodiment of a resin sealing apparatus for sealing a resin using a liquid resin with a sealing mold provided with a fixed partition portion 28 having no runner path 30. A lower mold base 42 guides and supports the lower mold 21 in the mold opening and closing direction. A support rod 44 is connected to a drive mechanism for pushing the lower mold 21 in the mold opening and closing direction. The lower mold 21 can be moved up and down by, for example, rotating a ball screw by a motor to move the support rod 44 forward and backward.

As shown in FIG. 10, the resin sealing device of the present embodiment has an arrangement in which the mold opening / closing direction is inclined at several degrees with respect to the vertical line, and the release film 40 is placed on the resin molding surface of the lower mold 21. It is characterized in that the molded product 16 is clamped and resin-sealed after supplying the liquid resin 50 in a state where air is not sucked. In FIG. 10, θ indicates the angle at which the mold is arranged to be inclined with respect to the vertical line.

FIG. 10 shows the lower mold base 42 with the mold opened.
After the peripheral portion of the release film 40 is supported and a predetermined amount of the liquid resin 50 is supplied onto the release film 40, the peripheral portion of the molded product 16 is moved to the upper mold 20 and the lower mold base 42.
And shows the state clamped. The release film 40 sags, and the liquid resin 50 is stored on the release film 40. The liquid resin 50 is accommodated so as to be deviated leftward from the center line CL due to the inclined installation of the mold.

The liquid resin 50 supplies a sufficient amount of resin to fill all the cavities provided in the lower mold 21. In FIG. 10, the lower mold 21 is in the lower position. The lower mold 21 is pushed up toward the upper mold 20 from this lower position. As the lower mold 21 rises, the liquid resin 50 is pushed up through the release film 40. However, since the mold is arranged at an angle, the cavity 26 on the lower side of the lower mold 21 gradually moves to the cavity on the higher side. The liquid resin 50 is filled toward 26.

FIG. 11 shows a state in which the lower mold 21 is completely pushed up to the upper position, and the molded article 16 is clamped by the upper mold 20 and the lower mold 21. The liquid resin 50 is filled in all the cavities 26 via the release film 40. In this manner, the liquid resin 50 is cured and sealed with the molded article 16 clamped by the upper mold 20 and the lower mold 21. 46 is a heater for heating the upper mold 20 and the lower mold 21.

The lower mold 21 is a mold provided with partitions 28 in the vertical and horizontal directions. The lower mold 21 is arranged in an inclined manner, and the liquid resin 50 is filled in order from the lower cavity 26 so as to fill the partitions. It is possible to fill all the cavities 26 with the liquid resin 50 without providing the runner paths 30 in the 28. By not providing the runner path 30 in the partition section 28, the resin sealing section 36 can be completely sealed with the resin as shown in FIG.

When the liquid resin 50 is supplied and sealed as described above, the amount of the liquid resin is slightly larger than that required to fill all the cavities 26 so that the amount of the resin is not insufficient. Supply 50. The overflow cavity 48 provided on the parting surface of the lower mold base 42 is for accommodating excess resin when the resin is sealed. The cavity 48 for overflow is the lower mold 2
1 is provided on the parting surface of the lower mold base 42 adjacent to the highest cavity. This is because the liquid resin 50 that has been filled in order from the lower cavity first contains the overflow of the liquid resin 50 from the cavity.

Note that it is also possible to supply a resin tablet instead of the liquid resin 50 and perform resin sealing. The resin tablet is supplied in a state where the release film 40 is supported by the lower mold base 42, and the resin tablet is melted by the heat of the sealing mold. 26 is filled with resin and sealed with resin. If a resin tablet with a small amount of voids is used, a suitable resin sealing without voids can be achieved as in the case of using a liquid resin.

In the resin sealing device shown in FIGS. 10 to 12, the clamp surface of the lower die 21 is formed in parallel with the clamp surface of the upper die 20, but the clamp surface of the lower die 21 is low in the initial design state. 0.05m as a whole from side to high side
When the lower mold 21 is pushed up to clamp the molded product 16 between the upper mold 20 and the lower mold 21, the mold clamp is controlled so as to be gradually clamped from the lower side to the higher side. be able to. By controlling the clamp itself of the mold in this manner, air can be easily released from the highest position, and the release film 40 can be clamped so as to be slightly extended to the higher position, so that the release film 40 is wrinkled. There is an advantage that resin sealing can be performed without using any resin.

FIG. 12 shows another example of the structure of the resin sealing apparatus in which the mold is inclined to raise and lower the lower mold 21 to seal the resin. The resin sealing device of the present embodiment is provided with a melting part 60 for heating and melting the resin tablet 34 as a resin supply part in the upper mold 20 or the lower mold 21.
a is supplied on the release film 40. FIG. 12 shows a configuration in which a melting portion 60 provided with a tablet pressing plate 62 and a pressing spring 64 is provided on the upper mold 20, and the resin tablet 34 is heated and melted while being pressed by the pressing plate 62. 66 is a heater.

Since the upper mold 20 and the lower mold 21 are arranged obliquely in the same manner as in the above-described embodiment, the fusion part 60 is arranged at the highest position among the parting surfaces of the upper mold 20 and the fusion part 60 The melted resin 34 a is pushed out by the pressing plate 62 and flows into the release film 40. 68 is the resin 3 from the base of the melting portion 60 to the lower mold 21 side.
4a is a gate for flowing in.

The resin sealing operation by the resin sealing device of the present embodiment is performed by releasing the release film 40 and the molded product 1 when the mold is opened.
6 is set and the resin tablet 34 is supplied to the melting portion 60 to close the upper mold 20 and the lower mold base 42. Next, the mold apparatus is inclined from the vertical position to a predetermined angle as shown in FIG. 12, and the molten resin 34a is supplied onto the release film 40. The method of supplying the required amount of resin 34a onto the release film 40 is based on the upper mold 20.
The method is not limited to the method of providing the melting portion 60 in the lower mold 21.
It is also possible to provide an extrusion mechanism such as a plunger and a pot for supplying the resin, supply the resin tablet 34 to the pot, and supply the molten resin 34 a from the gate 68. It is also possible to use a granular resin or a liquid resin instead of the resin tablet 34. The liquid resin may be in the form of a tablet, which is hermetically sealed with a resin film, in the form of a pencil, or the like.

In this embodiment, the lower mold 21 is made movable, the lower mold 21 is raised, and the molded product 16 is clamped and sealed with resin. However, the operation of the upper mold 20 and the lower mold 21 is reversed. The upper mold 20 is movable, and the upper mold 20 has a cavity recess 26a.
With the semiconductor chip 10 facing upward,
Can be set and sealed with resin. This is because in the case of the present embodiment, the resin 34a is extruded into the cavity 26 by providing the melting portion 60 or an extruding mechanism. Also in the case of the present embodiment, the release film is supplied not only to the lower mold 21 but also to the parting surface of the upper mold 20 and the parting surface is covered with the release film so that the resin does not adhere to the mold. It can be resin-sealed.

The resin sealing device shown in FIGS. 10 to 12 is characterized in that the resin is sealed only by raising and lowering the plate-shaped lower mold 21 having the cavity concave portion 26a without feeding the resin from the pot to the cavity. And FIG. 13 shows another embodiment of the resin sealing device for sealing the resin by a method of raising and lowering the lower mold 21. FIG. 13 shows a configuration in which the upper die 20 is supported on the fixed platen 70 and the lower die 21 is supported on the movable platen 72 so that the lower die 21 can be moved up and down. FIGS. 10 to 12
In the resin sealing device shown in FIG. 1, the lower mold 21 is moved up and down while being inclined with respect to the vertical line. In the present embodiment, the lower mold 21 is moved up and down in the vertical direction.
The lower mold 21 is connected to the lower mold base 42 via the base block 74.
, And the lower mold base 42 is fixed to the movable platen 72. Thus, the lower mold 21 is pushed by the movable platen 72.

Reference numeral 76 denotes a clamper that clamps the outer periphery of the sealing area when sealing the molded article 16 with resin. The clamper 76 is constantly urged toward the upper die 20 by a resilient spring 78, and is movable in the vertical direction with respect to the movable platen 72. Note that as a means for urging the clamper 76, a control means such as an air cylinder can be used. When a control means such as an air cylinder is used, it is possible to support the molded product 16 in a flat state by lowering the clamp end surface of the clamper 76 at the bottom position of the cavity when setting the molded product 16. There are advantages. This is useful when a large-sized semiconductor wafer or the like is used as the molded article 16 because breakage or the like can be prevented. 80a is a supply roll of the release film 40, and 80b is a take-up roll of the release film 40. Release film 40 according to resin sealing operation
Is fed from the supply roll 80a to the lower die 21 at a fixed size, and is wound up by the winding roll 80b. Reference numeral 82 denotes a delivery roller for transporting the release film 40, and reference numeral 84 denotes a take-up roller.

The resin sealing operation by the resin sealing device of this embodiment is as follows. First, a release film 40 is newly supplied onto the lower mold 21 while the lower mold 21 is at the lower position. The clamp surface of the clamper 76 protrudes above the resin molding surface of the lower die 21 in a state where the lower die 21 is at the lower position by the urging force of the resilient spring 78. The release film 40 covers the end surface of the clamper 76, and is suction-supported by the clamp surface by sucking air from an air suction hole 76a provided in the clamper 76. Next, air is suctioned from the inner bottom surface side of the lower mold 21 at the lower position, and as shown in FIG. 13, the resin housing recess in which the inner surface of the recess surrounded by the lower mold 21 and the clamper 76 is covered with the release film 40. To form In this state, a predetermined amount of the liquid resin 50 is supplied to the resin storage recess.

The molded article 16 has a plurality of semiconductor chips 10 mounted on one side of a substrate 12. Molded product 16
May be positioned and set on the upper mold 20 or may be positioned and set on the clamper 76 with the release film 40 arranged. After setting the molded product 16, the movable platen 72 is moved upward and the molded product 16 is clamped by the upper mold 20, the clamper 76 and the lower mold 21.
When the movable platen 72 moves upward, first, the clamper 76
And the upper mold 20 clamps the periphery of the molded product 16,
Further, the movable platen 72 moves upward to move the lower mold 21 and the upper mold 20.
Thus, the molded product 16 is clamped. After the clamper 76 stops, when the lower mold 21 rises, the spring 7
8 shrinks.

Reference numerals 86 and 87 denote stoppers for regulating the upper position when the lower die 21 moves upward. Lower die 21 is stopper 8
6, 87 rise to the level where the end faces abut, and stop.
The stoppers 86 and 87 are provided to prevent the movable platen 72 from excessively clamping the molded product 16 at the time of clamping and damaging the molded product. The liquid resin 50 is immersed in the order of the wire, the semiconductor chip, and the substrate by pushing up the lower mold 21 while clamping the peripheral portion of the molded product 16 by the clamper 76. Device is liquid resin 5
The resin becomes release film 4
The semiconductor chip 10 is extruded into the individual cavities 26 in such a manner as to push out 0, and the semiconductor chip 10 is resin-sealed for each cavity.

The liquid resin 50 is heated and cured while the lower mold 21 is completely pushed up to the upper position. The upper mold 20 and the lower mold 21 are heated by the heater 46. After the resin is cured, the movable platen 72 is lowered to open the mold. At the time of opening the mold, first, the lower mold 21 moves down while the molded article 16 is clamped by the clamper 76, and then the clamper 76 moves down while supporting the molded article. When the mold is opened, the molded product is taken out of the mold, the suction support of the release film 40 by the clamper 76 is released, and the release film 40 is newly drawn. Thus, the next resin sealing state is achieved.

The plate-shaped lower mold 21 provided with the plurality of cavity concave portions 26a as in the present embodiment is
In the method of resin sealing by pushing in step 2, the resin molding pressure effectively acts on the molded article 16, and therefore, the resin sealing is performed with a press machine with a smaller output than in the conventional transfer mold. It is possible. In the conventional resin sealing device, a pressing device of about 120 tons and a device having a thrust of a plunger of 3 tons are used, but in the case of the device of the present embodiment, a pressing device of about 15 tons is sufficient. is there.

Further, it is possible to seal a large plate-shaped molded product such as A3 size or A4 size with resin. The upper mold 20 and the lower mold 21 have a built-in heater 46, and the molded article 16 is heated from both sides to shorten the resin curing time, whereby the resin sealing operation can be made more efficient. It is preferable to adjust the heaters of the upper mold 20 and the lower mold 21 so that the calorific value of the center becomes large so that the molded product is hardened from the center so as not to warp. Further, a heater is provided in an in-loader for setting the molded article 16 in a mold, and the
If the molded article 16 is heated in advance before setting the molded article 6 in the mold, the warpage when the molded article 16 is set in the mold can be considerably reduced.

According to the method of this embodiment, the lower mold 21 is moved up and down to clamp the molded article 16 between the upper mold 20 and the resin. Stopping is possible. Further, since no internal stress is generated in the resin, a molded product without warpage can be obtained. Further, by sealing with resin via the release film 40, the substrate 12
Even if the thickness of the substrate 12 varies, the substrate 12 can be reliably clamped at the boundary between the cavities, and the surface of the substrate 12 can be sealed with resin without generating resin burrs. Further, by covering the lower mold 21 with the release film 40, the resin does not adhere to the surfaces of the lower mold 21 and the clamper 76,
It is possible to prevent the resin from entering these movable parts, thereby enabling a smooth movable operation.

FIGS. 14 and 15 show an apparatus for resin-molding one surface of a semiconductor wafer 90 as an application example of a resin sealing apparatus for sealing a resin by raising and lowering the lower mold 21. A large number of pillars 92 for connecting external connection terminals are provided on one surface of the semiconductor wafer 90, and the surface on which the pillars 92 are provided is resin-molded so that the end faces of the pillars 92 are exposed. After resin molding, the semiconductor wafer 90 is divided into individual pieces to form a product. As shown in FIG. 14, the lower mold 21 is supported by the movable platen 72,
Movably, release film 4 on lower mold 21
The configuration for supplying 0 is the same as that of the above-described embodiment. The semiconductor wafer 90 is set on the lower mold 21 with the molding surface facing upward, and the release film 4 is formed on the resin molding surface of the upper mold 20.
1 is different. The release film 41 prevents the resin from adhering to the upper mold 20. 81
a is a supply roll of the release film 41, and 81b is a take-up roll.

In the resin sealing device of this embodiment, first, the release film 41 is supplied and set on the clamp surface of the upper die 20 in a state where the die is opened, and the release film 40 is supplied to the lower die 21 so that the clamper is opened. At 76, the release film 40 is suction-supported. Next, the release film 40 is suctioned by air from the inner bottom surface of the lower mold 21, and the release film 4 is placed on the inner surface of the concave portion surrounded by the clamper 76 and the lower mold 21.
Then, the semiconductor wafer 90 is set in the recess.
Next, the resin 94 is set at a substantially central portion of the semiconductor wafer 90. FIG. 14 shows a state where the resin 94 is set.

Next, the movable platen 72 is moved upward to start clamping. First, the resin 94 is clamped, and then the clamper 76 contacts the upper mold 20. When the clamper 76 contacts the upper mold 20 and the movable platen 72 further moves upward, the lower mold 21 pushes up the semiconductor wafer 90. The operation in which the lower die 21 pushes up the semiconductor wafer 90 stops when the stoppers 86 and 87 of the upper die 20 and the lower die 21 abut. This stop position is a state where the resin 94 is melted and the space between the pillars 92 is filled with the resin 94a, and the thickness of the product is defined at this position. When the lower mold 20 is pushed up, the resin 94 is gradually melted, immersed in the periphery from the central portion so as to gradually increase the immersion radius, and finally filled between the pillars 92.

FIG. 15 shows a state in which the stoppers 86 and 87 are in contact with each other and the lower mold 21 is pushed up to the upper position. The resin 94a is filled between the pillars 92 erected on the semiconductor wafer 90, and the end faces of the pillars 92 are slightly molded into the release film 41 so that the resin 94a does not adhere to the end faces of the pillars 92. Even if there is a slight variation in the height dimension of the pillar 92, the resin 92 is molded through the release film 41 to absorb the variation, and
The resin can be molded by reliably exposing the end face of the resin.
Reference numeral 96 denotes an air suction hole for sucking and supporting the release film 41 by the upper die 21, and 98 denotes an overflow cavity.

FIG. 16 is a plan view of the upper mold 20 of the resin mold shown in FIG. 15, and FIG. 17 is a plan view of the lower mold 21. Figure 1
Reference numeral 20c denotes a circular pressing surface provided on the parting surface of the upper die 20 for pressing the semiconductor wafer 90 as a molded product.
The release film 41 is attached to the upper die 20 around the pressing surface 20c.
Are arranged at predetermined intervals.
In the illustrated example, the air suction holes 96 are arranged in a square shape, but may be arranged in a concentric circular shape according to the shape of the pressing surface 20c.

The air suction holes 96 and 7 are formed on the parting surfaces (including the bottom surface of the cavity) on the upper mold 20 and lower mold 21 sides.
When the area surrounded by 6a is formed on a rough surface such as satin finish by electric discharge machining, sand blasting or the like, the frictional resistance is reduced due to slight irregularities on the surface, the release film is easily moved, and the release film can be reliably positioned. Become like In addition, the surface irregularities make it difficult for the heat from the mold to be transmitted, and the release film does not stretch at once, so that when the release film is suctioned by air, the entire film is easily sucked. Further, since the air is easily released, even if wrinkles occur when the release film is sucked, the wrinkles are gradually eliminated by continuing the air suction. In addition, as a rough surface shape, there is a method of providing grooves in addition to satin. The clamp area may be finished to a smooth surface.

As shown in FIG. 17, the lower mold 21 supporting the semiconductor wafer 90 is formed in a circular shape in a plane according to the diameter of the semiconductor wafer 90. The clamper 76 is the lower mold 21
Is provided so as to be slidable with respect to the lower mold 21 on the outside. 76
Reference numeral b denotes a clamp projection provided on the surface of the clamper 76 along the outer periphery of the lower mold 21. The clamp projection 76b is provided so as to slightly protrude from the parting surface so that a clamping force is reliably applied at the boundary between the resin sealing regions. Reference numeral 76c denotes an overflow gate in which the clamp projection 76b is cut out in a groove shape.

The overflow cavity 98 is arranged so as to make a round around the outside of the clamp projection 76b. An air vent hole 9 is formed in the bottom of the overflow cavity 98.
8a is opened, and the release film 40 can be sucked into the overflow cavity 98 by communicating with the air suction mechanism. Similarly to the lower die 21, the upper die 20 is provided with a cavity 98 for overflow. Reference numeral 77 in the lower mold 21 denotes a suction groove disposed further outside the cavity 98 for overflow. In the present embodiment, the suction grooves 77
It is provided in several places. Reference numeral 77a denotes a suction hole opened on the bottom surface of the suction groove 77. This suction hole 77a also communicates with the air suction mechanism so that the release film 40 can be drawn into the suction groove 77. The slack of the release film 40 is drawn into the suction groove 77, and wrinkles can be removed. Suction groove 7
The shape 7 may be a shape that is not divided but communicated in the circumferential direction. Note that, by partially increasing the depth of the overflow cavity 98, it is possible to have the same effect of drawing the slack of the release film 40 as the absorption groove 77.

FIG. 18 shows the lower die 2
1 shows an embodiment of a resin sealing device for resin molding a semiconductor wafer 90. Basic configurations such as supplying the release films 40 and 41 to the upper mold 20 and the lower mold 21, using the clamper 76, and supporting the lower mold 21 with the movable platen 72 are the same as those in the above embodiment. Reference numeral 101 denotes a seal ring provided for sucking air from the bottom side of the lower mold 21. In the resin sealing device according to the present embodiment, after setting the release films 40 and 41 on the upper mold 20 and the lower mold 21, the semiconductor wafer 90 is placed on the lower mold 21 by supporting the peripheral portion on the upper surface of the clamper 76. The liquid resin 50 is injected into a recess formed by the clamper 76 and the lower mold 21. FIG. 18 shows a state in which the liquid resin 50 is injected.

Next, the movable platen 72 is moved upward, the periphery of the semiconductor wafer 90 is clamped between the upper die 20 by the clamper 76, and the lower die 21 is further moved upward. Lower mold 21
When the stoppers 86 and 87 abut, the upward movement stops. As the lower mold 21 moves upward, the liquid resin 50 is immersed in the entire surface of the semiconductor wafer 90 where the pillars 92 are formed. Lower mold 2
Since the filling thickness of the liquid resin 50 is set so that the end face of the pillar 92 slightly enters the release film 40 at the push-up position of 1, the resin is removed from the end face of the pillar 92 and the resin is molded in a shape exposing the pillar 92. Is done.

As described in the present embodiment and the above embodiment, when the surface of the semiconductor wafer 90 on which the pillar 92 is formed is sealed with resin, the upper mold 20 and the lower mold 21 are covered with the release films 40 and 41. The resin molding method is preferably used as a resin molding method in a state where the end surface of the pillar 92 is exposed. By covering the resin molding surfaces of the upper mold 20 and the lower mold 21 with the release films 40 and 41, the resin does not adhere to the resin molding surfaces, so that it is not necessary to clean the mold surfaces and it is extremely clean. Resin molding in a state becomes possible, and it can be suitably used for manufacturing a highly reliable product.

In the resin sealing devices shown in FIGS. 13, 14 and 18 above, the lower mold 21 is supported by the movable platen 72 to make the lower mold 21 movable. It is also possible to raise and lower 20 and clamp the molded article 16 to seal the resin. That is, the operation of clamping the molded product 16 by the upper die 20 and the lower die 21 may be a relative clamping and pressing operation.

FIG. 19 shows another embodiment of the resin sealing device, in which a damper 78 is provided with an overflow cavity 10.
2 and a configuration in which the protrusion lengths of the stoppers 86 and 87 can be adjusted. The overflow cavity 102 communicates with the air mechanism through a vent 104.
106 is an overflow gate, and 108 is an air vent. FIG. 19B shows a cavity 10 for overflow.
2, a plan view of the overflow gate 106 and the air vent 108 is shown. The overflow cavity 102 communicates in the circumferential direction, and the overflow gate 1
06 is arranged. A plurality of air vents 108 are arranged at predetermined intervals on the outer periphery of the overflow cavity 102. Reference numeral 110 denotes a clamp surface for clamping the release films 40 and 41.

The resin overflowing from the resin molded portion enters the overflow cavity 102 whose inner surface is covered with the release film 40. In this state, by applying air pressure from the vent hole 104 to the overflow cavity 102, resin pressure can be applied to the resin supplied into the cavity, and a decrease in the resin pressure in the resin molding portion can be prevented. it can. In addition, by controlling the air pressure from the vent hole 104, it is possible to control the resistance when the resin is discharged to the overflow cavity 102. By controlling the amount of resin overflow into the overflow cavity 102, the thickness of the package can be accurately controlled.

Reference numeral 116 denotes a motor for controlling the length of the protrusion of the stopper 86 on the upper die 20 side. The stopper 86 is supported so as to be able to protrude into the guide rod, and an elliptical cam fitted to the stopper 86 is attached to the output shaft of the motor 116, and the amount of projection of the stopper 86 is adjusted by the rotation position of the elliptical cam. The thickness of the molded product slightly varies depending on the product or lot. For example, in the case of the semiconductor wafer 90, there are variations in the thickness of the wafer, the thickness of the protective film, the dimensions of the pillars 92, and the like. Therefore, it is preferable that the height of the stopper can be adjusted so that clamping can be appropriately performed in response to such variations. Actually, the adjustment height of the stopper 86 may be about ± 0.1 mm.

As described above, according to the method of raising and lowering the lower mold 21 and sealing the resin, it is possible to use a considerably large mold as the lower mold 21 because the resin pressure effectively acts. Become. However, when the size of the mold becomes large, there is a problem that the degree of curing of the resin in the cavity differs depending on the location. When the entire lower mold 21 is viewed as a large cavity, it is preferable that the curing of the resin gradually extends from the center of the lower mold to the periphery. This is because the void is expelled to the outside of the cavity so that the void remains in the cavity as little as possible. In order to cure the resin in the central portion first in the entire lower mold 21 as described above, a method of increasing the heat capacity in the central portion of the mold and decreasing the heat capacity in the peripheral portion, and changing the capacity of the heater to the central portion To make it larger and make it smaller in the periphery. In addition,
When the plane shape of the whole mold is circular, there is an advantage that the temperature distribution can be made uniform.

FIG. 20 shows an example in which a heat insulating space 108 is provided in the mold to control the distribution of the heat capacity of the mold.
Further, since the resin has a property of contracting when cured, it is also possible to adopt a configuration in which the resin is overfilled at the center of the cavity so that a predetermined thickness is obtained when the resin contracts. . That is, the mold is slightly pushed out at the center of the cavity when receiving the resin pressure, and returns to the original position when the resin contracts. FIG.
Reference numeral 110 denotes a portion formed in the center of the mold at a gap of about 0.02 mm. Thereby, the mold is slightly spread by the resin pressure.

As described in the above embodiments, the resin sealing device according to the present invention is characterized in that the resin sealing is performed via the release film 40. When the resin is sealed via the release film 40 in this manner, the resin filled in the cavity by the pressure of the air remaining in the cavity and the elastic force of the release film 40 when viewed from each cavity. There is an advantage that the resin is sealed by applying an appropriate holding pressure.

FIG. 21 shows a state where the molded product 16 is clamped by the upper mold 20 and the lower mold 21 via the release film 40. Since the cavity concave portions 26a are individually divided by the partition portions 28 provided in the lower mold 21, when the molded product 16 is clamped via the release film 40,
Air is confined in the cavity concave portion 26a and compressed. The air confined in the cavity 26a acts to press the resins 34a and 50 via the release film 40, and at the same time, the elastic force of the release film also acts to press the resin. This works as an action of applying an appropriate holding pressure to the resin filled in the cavity and sealing the resin when the volume of the resin decreases during curing.

In the example shown in FIG. 21, an air inlet 33 is provided in the lower mold 21 to communicate with the inner bottom surface of the cavity 26a.
Compressed air is supplied from the air supply hole 33 to apply a holding pressure. Instead of providing the air inlet hole 33, the holding pressure may be applied by using the suction hole 32 that sucks the release film 40 into the inner surface of the cavity concave portion 26a by air.

FIGS. 22 and 23 show an example of the configuration of a mold which is provided with a runner path on the end face of a partition section 28 for partitioning the cavity concave portion 26a and is sealed with a resin. In the embodiment, a runner path 29a connecting the cavities 26 to each other and a runner path 29 connecting the cavities 26 at diagonal positions at positions where the partition parts 28 intersect are provided at the partition part 28 in the middle of the adjacent cavities 26. . By providing a runner path in the partition 28, air remaining in the cavities 26 can be communicated between the cavities 26.
The holding pressure can be balanced between the six. Further, the runner path has an effect of averaging the amount of resin between the cavities 26 similarly to the aforementioned runner path 30 and the like.

Examples of the molded article include not only a semiconductor chip 10 mounted on a resin substrate, but also a module product having various circuit components mounted on a resin substrate, a semiconductor wafer as a substrate, and electrodes on a surface of the semiconductor wafer. Various products, such as those formed and those having circuits formed on semiconductor wafers, are targeted. Further, as the substrate, a multilayer substrate or a tape substrate can be used. In the above embodiment, a long release film wound in a reel shape is used, but a strip-like release film may be used. In addition, by setting the dimensions of the mold used for resin molding to specific standard dimensions such as A3, A4, and A5, it is possible to use a resin sealing device in common and to use the device efficiently. Will be able to

In addition, when the parting surfaces of the upper dies 20 and 21 including the resin molded portion are subjected to electroless plating with a ternary alloy of nickel-boron-tungsten, the releasability of the resin is good. Therefore, it can be suitably used as a measure against resin leakage during resin molding. The mold surface treated with silicon-based super-water-repellent organic plating, and the mold surface treated by dispersion plating using fluorinated Teflon (registered trademark) or oligomer as dispersed particles are made of gold. Since the resin flow is small in the resin sealing device by moving the mold, it can be suitably used, and is an effective process for preventing resin leakage.

[0081]

According to the method of manufacturing a semiconductor device according to the present invention, as described above, it is easy to resin-mold one surface of a molded product having a plurality of semiconductor chips or circuit components mounted on a substrate. And it can be performed reliably. Also,
By using a release film to seal the resin, the structure of the mold can be simplified, and the resin can be sealed without generating resin burrs, making it possible to manufacture highly reliable semiconductor devices. Becomes Further, according to the resin sealing device according to the present invention, it is possible to easily and reliably perform resin sealing of a molded article on which a semiconductor chip or the like is mounted for each resin sealing region. It works.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a state in which a molded product is set in a resin sealing device.

FIG. 2 is a cross-sectional view of the resin sealing device in a state where a molded product is clamped and resin-sealed.

FIG. 3 is a perspective view of a lower mold used in the resin sealing device.

FIG. 4 is a perspective view of a molded product obtained by sealing a molded product with a resin.

FIG. 5 is a sectional view showing another configuration of the resin sealing device.

FIG. 6 is a sectional view showing still another configuration of the resin sealing device.

FIG. 7 is a sectional view showing another embodiment of the resin sealing device.

FIG. 8 is a perspective view of a resin molded product obtained by sealing a molded product with a resin.

FIG. 9 is a perspective view of a lower mold for sealing a molded product with a resin.

FIG. 10 is a cross-sectional view showing a resin sealing device that raises and lowers a lower mold to seal the resin.

FIG. 11 is a cross-sectional view of a state in which a molded product is sealed with a resin.

FIG. 12 is a cross-sectional view showing a resin sealing device that raises and lowers a lower mold to seal the resin.

FIG. 13 is an explanatory diagram of a resin sealing device that raises and lowers a lower mold to seal the resin.

FIG. 14 is an explanatory diagram showing a configuration of a resin sealing device for a semiconductor wafer.

FIG. 15 is an enlarged sectional view showing a state in which the semiconductor wafer is sealed with a resin.

FIG. 16 is a plan view showing a configuration of an upper mold of the resin sealing device.

FIG. 17 is a plan view showing a configuration of a lower mold of the resin sealing device.

FIG. 18 is an explanatory view illustrating a configuration of a resin sealing device for a semiconductor wafer.

FIG. 19 is a cross-sectional view and a plan view illustrating a configuration of a clamper of the resin sealing device.

FIG. 20 is an explanatory view showing the internal structure of a mold.

FIG. 21 is a cross-sectional view showing a configuration inside a cavity in a state of being sealed with a resin.

FIG. 22 is a sectional view showing a state where a runner path is formed.

FIG. 23 is a plan view showing a state in which a runner path is formed.

FIG. 24 is a cross-sectional view of a state in which a molded product having a large number of semiconductor chips mounted on a substrate is sealed with a resin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Semiconductor chip 12 Substrate 14 Resin 16 Molding object 20 Upper die 21 Lower die 22 Plunger 24 Pot 26 Cavity 26a Cavity concave part 28 Partition part 28a Partition plate 30 Runner path 32 Suction hole 33 Air inlet hole 34 Resin tablet 34a Resin 36 Resin Sealing portions 40, 41 Release film 42 Lower mold base 46 Heater 50 Liquid resin 60 Melting portion 70 Fixed platen 72 Movable platen 76 Clamper 80a, 81a Supply roll 80b, 81b Take-up roll 86, 87 Stopper 90 Semiconductor wafer 92 Pillar 94 Resin 102 Cavity for overflow 104 Vent

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (Reference) B29L 9:00 B29L 9:00 31:34 31:34 F term (Reference) 4F202 AD03 AD05 AD08 AG03 AH36 AH37 CA12 CB01 CB12 CB17 CK11 CK43 CL02 CQ01 CQ05 4F206 AD03 AD05 AD08 AG03 AH36 AH37 JA02 JB12 JB17 JF05 JL02 JM04 5F061 AA01 BA03 CA21 DA01 EA01

Claims (12)

[Claims] A substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one side is used as a molded article, and the molded article is clamped by an upper mold and a lower mold to mount a semiconductor chip or the like. In a method of manufacturing a semiconductor device in which one surface is individually resin-sealed corresponding to a mounting position of the semiconductor chip or the like, the one mold surface for resin-sealing the upper or lower mold is provided with Using a mold in which cavity recesses are individually divided by partitioning portions in accordance with each resin sealing area on the substrate, and with the mold opened, the mold surface of the one mold is Supplying a release film that easily peels off the mold and the sealing resin over a range covering the plane area of the molded article, disposing the molded article in the mold, and removing the molded article via the release film. Clamp and release the said fill The method of manufacturing a semiconductor device, characterized in that the end face of the partition portion is resin-sealed by filling a resin into the cavity formed by being pressed against the surface of the substrate via. 2. After supplying a release film to the mold surface of the one mold, air is sucked from the inner bottom surface side of the cavity recess to adsorb the release film to the inner surface of the cavity recess. 2. The method of manufacturing a semiconductor device according to claim 1, wherein the molded article is placed in a mold while the mold is sucked into the cavity recess. 3. A substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one surface is used as a molded article, and the molded article is clamped by an upper mold and a lower mold to mount a semiconductor chip or the like. A method of manufacturing a semiconductor device in which one surface is sealed with a resin corresponding to a mounting position of the semiconductor chip or the like, wherein the upper mold or the lower mold is resin-sealed on one mold surface with the substrate. Using a mold in which cavity recesses are individually divided by a partition plate movable in the mold opening and closing direction in accordance with each resin sealing region in the above, and the mold of the one mold is opened in a mold opened state. Supplying a release film that easily peels off the mold and the sealing resin over a range that covers the plane area of the molded article on the mold surface, disposing the molded article in the mold, Clamps the molded product through After filling the resin in the cavity sandwiched between the mold surface of the mold and the substrate, the partition plate is pushed in the mold opening and closing direction to align with each resin sealing area on the substrate via the release film. A method for manufacturing a semiconductor device, wherein the semiconductor device is divided and sealed with a resin. 4. When the partition plate is pushed in the mold opening / closing direction, an end face of the partition plate is pressed against the surface of the substrate via the release film to be sealed with a resin. The manufacturing method of the semiconductor device described in the above. 5. A substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one surface is used as a molded article, and the molded article is clamped by an upper mold and a lower mold to mount a semiconductor chip or the like. In a method of manufacturing a semiconductor device in which one surface is individually resin-sealed corresponding to a mounting position of the semiconductor chip or the like, a cavity recess is formed by a partition part as the lower die in accordance with each resin sealing region on the substrate. Using molds that are individually formed, with the mold opened and the lower mold lowered from the clamp position, the mold surface of the mold extends over a range covering the flat area of the molded article. Supplying a release film that easily peels off from the mold and the sealing resin, supplying a required amount of resin to the lower mold covered with the release film, moving the lower mold upward, and Mold and lower mold By clamping the molded article through a release film, the cavity is formed by pressing the end face of the partition portion through the release film against the surface of the substrate, and the cavity is filled with resin. A method of manufacturing a semiconductor device. 6. A substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one surface is used as a molded product, the molded product is clamped by an upper mold and a lower mold, and resin is fed from a pot to a cavity. Then, in a resin sealing device for resin-sealing one surface of the substrate for each resin sealing region corresponding to the mounting position of the semiconductor chip or the like, the upper or lower mold is sealed with resin. On one mold surface, in accordance with each resin sealing area on the substrate, the cavity recesses were individually formed by partitioning portions whose end faces pressed against the resin sealing surface of the substrate during resin sealing. A release film that is provided with a mold, and in a state where the mold is opened, the mold and the sealing resin are easily peeled from the mold and the sealing resin in a range that covers a plane area of the molded article on the mold surface of the one mold. Supply release film supply machine Air is sucked into the one mold from the inner bottom surface side of the cavity recess, and a suction hole for sucking the release film supplied to the mold surface of the mold to the inner surface of the cavity recess is provided. A resin sealing device provided in communication with a mechanism. 7. The resin sealing device according to claim 6, wherein a runner path is provided in said one mold so as to cut off an end face side of said partition portion and communicate with an adjacent cavity concave portion. 8. A substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one side is a molded article, the molded article is clamped by an upper mold and a lower mold, and the resin is pressure-fed from a pot to a cavity. Then, in a resin sealing device for resin-sealing one surface of the substrate for each resin sealing region corresponding to the mounting position of the semiconductor chip or the like, the upper or lower mold is sealed with resin. The cavity recesses are individually formed on one mold surface by a partition plate that is movably supported in the mold opening and closing direction and whose end surface presses the surface of the substrate to be sealed with the resin, in accordance with the respective resin sealing regions. A mold that is formed separately is provided, and in a state where the mold is opened, the mold and the sealing resin are provided on the mold surface of the one mold so as to cover the plane area of the molded article. Release film that supplies release film that peels easily Resin sealing apparatus characterized in that a feed mechanism of Lum. 9. A substrate on which a plurality of semiconductor chips and / or circuit components are mounted on one side is a molded article, and a required amount of sealing resin is applied to the lower mold while the lower mold is lowered from a clamp position. After the supply, the molded article is clamped by an upper mold and a lower mold, and in a resin sealing device for resin-sealing one surface of the substrate for each resin sealing region corresponding to the mounting position of the semiconductor chip or the like, As the lower mold, cavity recesses are individually formed by partitioning portions whose end faces press against the surface of the substrate to be resin-sealed during resin-sealing, in accordance with each resin-sealed region to be an individual semiconductor device. In the state where the mold is opened and the lower mold is lowered from the clamp position, the mold and the seal for sealing are formed on the mold surface of the mold so as to cover the plane area of the molded article. Lily supplies a release film that easily peels off the resin Resin sealing apparatus characterized in that a supply mechanism of the film. 10. The direction of opening and closing the upper and lower dies,
The resin sealing device according to claim 9, wherein the resin sealing device is arranged to be inclined with respect to a vertical line. 11. The clamp according to claim 9, wherein a clamper is provided on the outer periphery of the lower mold, the clamper being movable in the mold opening / closing direction, and having an end surface protruding from the mold surface of the lower mold when the mold is opened. Resin sealing device. 12. An air suction hole for sucking a release film to the clamper and sucking the release film on an end face of the clamper by air suction, and releasing the release film to the lower mold by air, and using the lower mold and the clamper. The resin sealing device according to claim 11, further comprising an air suction mechanism for covering an inner surface of the enclosed recess with a release film.