WO2005077633A1 - 電子部品の樹脂封止方法およびそれに用いられる金型 - Google Patents
電子部品の樹脂封止方法およびそれに用いられる金型 Download PDFInfo
- Publication number
- WO2005077633A1 WO2005077633A1 PCT/JP2004/019164 JP2004019164W WO2005077633A1 WO 2005077633 A1 WO2005077633 A1 WO 2005077633A1 JP 2004019164 W JP2004019164 W JP 2004019164W WO 2005077633 A1 WO2005077633 A1 WO 2005077633A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- substrate
- resin
- cavity
- sealing
- Prior art date
Links
- 239000011347 resin Substances 0.000 title claims abstract description 137
- 229920005989 resin Polymers 0.000 title claims abstract description 137
- 238000007789 sealing Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000758 substrate Substances 0.000 claims description 116
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 18
- 239000000463 material Substances 0.000 description 17
- 238000000465 moulding Methods 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
- H01L21/565—Moulds
- H01L21/566—Release layers for moulds, e.g. release layers, layers against residue during moulding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/68—Release sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/38—Moulds for making articles of definite length, i.e. discrete articles with means to avoid flashes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/93—Batch processes
- H01L24/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L24/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/491—Disposition
- H01L2224/4912—Layout
- H01L2224/49175—Parallel arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/93—Batch processes
- H01L2224/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L2224/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01004—Beryllium [Be]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01005—Boron [B]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01006—Carbon [C]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01033—Arsenic [As]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01082—Lead [Pb]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Definitions
- the present invention relates to a resin sealing method for sealing a substrate on which electronic components are mounted with resin, and a mold used for the method.
- a resin sealing method for an electronic component in which resin is introduced into a space in the mold by evacuating the mold to a vacuum is conventionally used.
- the air in the mold is sucked by the suction device while the mold is clamped.
- the resin spreads evenly in the mold, so that the resin can be molded favorably. Therefore, it is desirable to use both a method in which the above-described release film is used and a method in which the inside of the mold is vacuumed to form resin.
- Patent Document 1 JP-A-2002-43345 (see page 15 and FIG. 13)
- the inventor of the present application has invented a mold having a three-piece structure in order to use both a method using a release film and a method of making the inside of the mold a vacuum state.
- the three-piece mold has an intermediate mold in addition to the upper mold and the lower mold.
- the intermediate mold is inserted between the upper mold and the lower mold, and is used for pressing the release film against the lower mold during resin molding. Therefore, even when the resin is molded in a vacuum state in the mold, the release film is prevented from coming off the lower mold force and coming into contact with the electronic component.
- the present invention has been made in view of the above-described problems, and has as its object to press a mold release film against a lower mold surface by an intermediate mold of a three-piece mold, and Prevents the cured resin from cracking near the inner surface of the cavity when the mold is opened in the resin sealing method for electronic components where resin is molded while the mold is empty. It is to be.
- the resin sealing method for an electronic component according to the present invention includes an upper mold, a lower mold facing the upper mold, an intermediate mold provided between the upper mold and the lower mold, and a lower mold cavity. This is a method in which an electronic component is resin-sealed in a cavity using a release film to be coated.
- a pre-sealing substrate in which electronic components are mounted on an upper mold is attached.
- the lower mold and the intermediate mold sandwiching the release film the entire surface of the cavity is covered with the release film.
- the upper mold, the lower mold and the intermediate mold are clamped, whereby the electronic component is immersed in the molten resin in the cavity.
- the molten resin is cured to form a cured resin.
- the upper mold, the lower mold, and the intermediate mold are opened. After sealing, in which the electronic component is encapsulated by the cured resin, the upper mold force is removed.
- the resin is formed in a state where not only the bottom surface of the cavity but also the side surface of the cavity is covered with the release film. Therefore, the releasability between the cavity side surface and the cured resin is improved. Therefore, when the substrate is removed from the cavity after sealing, the cured resin is prevented from being damaged near the side surface of the cavity.
- the mold of the present invention is used in the above-described resin sealing method for electronic components.
- FIG. 1 is a diagram showing a substrate on which a resin-sealed semiconductor chip according to a first embodiment is mounted, in which a substrate before resin sealing is drawn on the left side and a substrate on the right side.
- FIG. 3 is a diagram illustrating a substrate after sealing with grease.
- FIG. 2 is a plan view showing a layout of the resin sealing device.
- FIG. 3 is a cross-sectional view of the mold according to the embodiment, showing a state where an upper mold, a lower mold, and an intermediate mold are opened.
- FIG. 4 is an enlarged sectional view of a main part of the mold shown in FIG. 3, showing a state in which a release film is held between a lower mold and an intermediate mold.
- FIG. 5 is an enlarged sectional view of a main part of the mold shown in FIG. 3, showing a state where the substrate and the resin material shown in FIG. 1 are supplied into the mold.
- FIG. 6 is an enlarged sectional view of a main part of the mold shown in FIG. 3, showing a state in which the substrate shown in FIG. 1 is mounted on the upper mold and the resin material is melted by heating in the cavity. It is.
- FIG. 7 is a view of the upper mold shown in FIG. 6 as viewed from below, and shows a state where the substrate shown in FIG. 1 is mounted on the upper mold surface.
- FIG. 8 is a view of the upper mold of FIG. 6 as viewed from below, and is a view of another example showing a state where the substrate shown in FIG. 1 is mounted on the upper mold surface.
- FIG. 9 is an enlarged cross-sectional view of a main part of the mold shown in FIG. 3, showing a state when air in the mold is sucked and the inside of the mold is evacuated.
- FIG. 10 is an enlarged sectional view of a main part of the mold shown in FIG. 3, showing a state immediately before the substrate shown in FIG. 1 is immersed in a molten resin.
- FIG. 11 is an enlarged cross-sectional view of a main part of the mold shown in FIG. 3, showing a state where the mold is completely clamped and the substrate shown in FIG. 1 is completely immersed in molten resin .
- FIG. 12 is an enlarged sectional view of a main part of the mold shown in FIG. 3, showing a state immediately after the resin-sealed substrate is separated from the lower mold.
- FIG. 13 is an enlarged sectional view of a main part of the mold shown in FIG. 3, showing a state immediately after the substrate shown in FIG. 1 has been removed from the upper mold.
- FIG. 14 is a diagram showing a substrate on which a resin-sealed semiconductor chip of Embodiment 2 is mounted, wherein a substrate before resin sealing is drawn on the left side, and resin-sealed on the right side.
- FIG. 11 is a drawing depicting a later substrate.
- FIG. 15 is an enlarged cross-sectional view of the mold according to the second embodiment, showing a state where the substrate shown in FIG. 14 is mounted on the upper mold surface.
- FIG. 16 is an enlarged cross-sectional view of a main part of the mold according to the second embodiment, showing a state where the mold is completely clamped and the substrate shown in FIG. 14 is completely immersed in the molten resin. is there.
- FIG. 17 is a view showing a substrate on which a resin-sealed semiconductor chip of Embodiment 3 is mounted, in which a substrate before resin sealing is drawn on the left side and resin-sealed on the right side.
- FIG. 11 is a drawing depicting a later substrate.
- FIG. 18 is an enlarged cross-sectional view of the mold according to Embodiment 3, showing a state where the substrate shown in FIG. 17 is mounted on the upper mold surface.
- FIG. 19 is an enlarged cross-sectional view of a main part of the mold according to Embodiment 3, showing a state where the mold is completely clamped and the substrate shown in FIG. 17 is completely immersed in the molten resin. is there.
- Substrate 1 is circular or polygonal.
- chips 2 On one surface of the substrate 1, a plurality of semiconductor chips 2 (hereinafter, simply referred to as “chip 2”) are mounted.
- the substrate 1 and the chip 2 are electrically connected by wires 3.
- One surface of the substrate 11 after sealing is a sealing molding portion 7 in which the resin encapsulating the chip 2 is molded, and a portion around the sealing molding portion 7, and the resin is And the outer peripheral portion 8 of the substrate that is not formed.
- the other surface of the substrate 1 located on the back side of the sealing molding 7 is a non-mounting surface 9 on which the chip 2 is not mounted.
- the cured resin 10 is formed in the sealing molding part 7.
- the substrate 1 is, for example, a BGA (Ball Grid Array) substrate, a CSP (Chip Size Package) substrate, or the like.
- the resin sealing device 70 of the present embodiment has the mold 12.
- the mold 12 is a mold for transferless molding, and has a three-piece structure.
- the three-piece mold includes an upper mold 13, a lower mold 14, and an intermediate mold 15.
- the mold 12 is mounted on a press unit 71.
- the resin sealing device 70 has a function of supplying the pre-sealing substrate 4 and the resin material 5 into the mold 12 and a function of removing the substrate 11 from the mold 12 after sealing. Is provided. Before being transferred onto the loader unit 73, the pre-sealing substrate 4 is stored in the in-magazine unit 74. The resin material 5 is stored in the resin material unit 75 before being transferred to the loader unit 73. After sealing, the substrate 11 is taken out of the press unit 71 by the loader unit 73 and stored in the out magazine unit 76.
- substrates 1 are placed on each of the in-magazine unit 74 and the out-magazine unit 76 with a space between each other.
- a slit-type magazine cassette is provided. Further, in the resin sealing step of the first embodiment, substrate 1 is stored in a magazine cassette with sealing molding portion 7 facing downward.
- the press unit 71 closes and opens the mold 12.
- the lower mold 14 is moved upward and downward by a pressing means such as a mechanism using the pressure of the working fluid or an electric press mechanism.
- the intermediate mold 15 is pressed by another pressing means different from the pressing means of the lower mold 14. Moved up and down.
- the release film 17 moves from the sending section 22 to the winding section 23 along the direction indicated by the arrow in FIG.
- the feeding section 22 and the winding section 23 can apply tension to the release film 17 or relax the tension of the release film 17.
- the loader unit 73 includes a transfer unit 78 such as a mechanical chuck transfer mechanism or a robot arm transfer mechanism. Accordingly, the pre-sealing substrate 4 and the resin material 5 are transported by the transporting means 78 and move in the mold 12 in a substantially horizontal direction.
- the upper part of the conveying means 78 is used for supplying the substrate 4 before sealing and taking out the substrate 11 after sealing, and the lower part of the conveying means 78 is used for supplying the resin material 5. .
- the resin material unit 75 includes a storage unit (not shown) such as a resin stocker for storing the granular resin material 5 to be used. Further, a control unit 77 for controlling the above-described units 71 to 76 and a vacuum unit is provided.
- the pre-sealing substrate 4 is transferred from the in-magazine unit 74 to the upper portion of the loader unit 73.
- the resin material 5 is transferred from the resin material unit 75 to the lower portion of the loader unit 73.
- the pre-sealing substrate 4 and the resin material 5 are transferred from the loader unit 73 to the press unit 71.
- resin sealing of the pre-sealing substrate 4 is performed by the mold 12, whereby the post-sealing substrate 11 is obtained.
- the substrate 11 after sealing is removed from the mold 12 and placed on the upper part of the loader unit 73. Thereafter, the substrate 11 is transferred from the loader unit 73 to the out magazine unit 76 after sealing.
- the mold 12 of the present embodiment includes an upper mold 13, a lower mold 14, and an intermediate mold 15, as shown in FIG.
- Upper die 13 does not move. Therefore, the position of the upper mold surface 18 of the upper mold 13 is fixed.
- the lower mold 14 moves upward and downward.
- the lower mold 14 includes a lower mold surface 19 and a convex portion 27 protruding from the lower mold surface 19.
- the protrusion 27 has a cavity surface 26 .
- the intermediate mold 15 is located between the upper mold 13 and the lower mold 14 and is moved upward and downward.
- the intermediate mold 15 has an upper mold surface 24 and a lower mold surface 25. Further, as shown in FIG. 3, the intermediate mold 15 includes a housing portion 43 for housing the chuck member 37 holding the substrate 1 and a through hole 44 into which the lower mold 14 is inserted.
- the upper die 13 includes a substrate mechanism 29, a seal member 30, and a suction / discharge hole 31.
- the substrate mechanism 29 fixes the pre-sealing substrate 4 on the upper mold surface 18 with the chip 2 facing downward.
- the seal member 30 closes the gap between the upper mold 13 and the intermediate mold 15 when the upper mold 13, the lower mold 14, and the intermediate mold 15 are clamped.
- the suction / discharge hole 31 communicates with a vacuum mechanism that evacuates the space in the mold when the upper mold 13, the lower mold 14, and the intermediate mold 15 are clamped.
- the substrate mechanism 29 of the upper mold 13 includes an adsorbing portion 32 that adsorbs the substrate 1 (the pre-sealing substrate 4 and the post-sealing substrate 11), and a narrower substrate 1. And a holding portion 33 to be held.
- the substrate 1 is suctioned to the suction portion 32 of the upper die 13.
- the suction section 32 includes a gas permeable member 34, a communication groove 35, and a suction / discharge hole 36.
- the air-permeable member attracts the non-mounting surface 9 of the substrate 1.
- the communication groove 35 communicates with the air-permeable member 34.
- the suction / discharge hole 36 communicates with the communication groove 35 and is connected to a vacuum mechanism (not shown). The vacuum mechanism sucks the non-mounting surface 9 of the substrate 1 through the air-permeable member 34, the communication groove 35, and the suction / discharge hole 36.
- the holding section 33 is provided between the suction section 32 and the seal member 30.
- the outer peripheral portion 8 of the substrate 1 is placed on the holding portion 33.
- the holding portion 33 includes a chuck member 37 having an opening corresponding to the chip 2, an attachment rod 38 attached to the chuck member 37, an elastic member 40 into which the attachment rod 38 is inserted, and a drive for driving the attachment rod 38. It has a member 39.
- the lower die 14 is provided with a film mechanism 28.
- the film mechanism 28 includes a permeable member 45, a communication groove 46 communicating with the permeable member 45, and a suction / discharge hole 47 communicating with the communication groove 46.
- the suction / discharge hole 47 communicates with a vacuum cut (not shown) for sucking the release film 17.
- the vacuum unit sucks the release film 17 toward the cavity surface 26 via the suction / discharge hole 47, the communication groove 46, and the air-permeable member 45. Goodbye
- the release film 17 is in close contact with the cavity surface 26. Therefore, the release film 17 covering the entire surface of the cavity 16 is prevented from moving into the cavity space 20.
- the film mechanism 28 discharges air from the cavity surface 26 via the suction / discharge hole 47, the communication groove 46, and the air-permeable member 45. Thereby, the substrate 11 is easily removed from the cavity surface 26 after the sealing.
- the intermediate mold 15 moves downward. Thereby, the lower mold side mold surface 25 and the release film 17 come into contact with each other. Thereafter, the intermediate mold 15 moves further downward. As a result, as shown in FIG. 4, the release film 17 is held between the lower mold surface 25 and the upper surface of the holding member 49.
- a mounting rod 50 that supports the holding member 49 is provided on the lower surface of the holding member 49.
- An elastic member 55 for elastically supporting the cavity member 52 is provided below the cavity member 52.
- the intermediate mold 15 is formed by the through holes 44 and the opening 48.
- the release film 17 in the space abuts on the cavity member 52.
- the cross-sectional shape of the cavity member 52 is an L-shape.
- the L-shape consists of a vertical part and a horizontal part.
- the vertical portion of the cavity member 52 is disposed around a contact portion 53 that comes into contact with the substrate outer peripheral portion 8 of the substrate 1 via the release film 17, and around the cavity surface 26, It has a cavity bottom surface 54a constituting a part of the bottom surface of the cavity 16 and a cavity side surface 54b constituting the side surface of the cavity 16.
- the horizontal portion of the cavity member 52 has an upper surface that contacts the lower surface of the sandwiching member 49 and a lower surface that contacts the lower mold surface 19 when the cavity member 52 moves downward.
- the elastic member 55 is connected to the lower surface of the horizontal portion of the cavity member 52 and is inserted into a recess provided in the lower die 14! RU
- the cross-sectional shape of the integrated transfer means 78 is a horizontal U-shape, and FIG. 5 shows only the tip of the horizontal portion in the horizontal U-shape. Have been. Further, the pre-sealing substrate 4 is fixed to the upper part of the transfer means 78, and the resin material 5 is fixed to the lower part of the transfer means 78.
- the release film 17 is connected to the intermediate mold 15 and the holding member 49 until the upper surface of the holding member 49 reaches a position lower than the contact portion 53 of the cavity member 52.
- the intermediate mold 15 moves downward in a state where the intermediate mold 15 is held.
- the release film 17 is applied to the entire surface of the cavity 16, that is, all of the cavity surface 26, the cavity bottom surface 54a, and the cavity side surface 54b. In close contact. Therefore, since the cavity side surface 54b is covered with the release film 17 that is not exposed, when the molten resin 6 is introduced into the cavity 16, the molten resin 6 and the cavity side surface 54b come into direct contact. None. That is, the molten resin 6 does not have a portion that contacts the lower mold 14. In other words, the molten resin 6 contains the chip 2 and is in contact only with the release film 17 and the pre-sealing substrate 4.
- the mold releasability between the cavity side surface 54b and the cured resin 10 is improved. As a result, chipping or cracking of the cured resin 10 in the vicinity of the cavity side surface 54b is prevented.
- the substrate 1 is held between the chuck member 37 and the upper die surface 18.
- the chuck member 37 and the mounting rod 38 move upward and downward.
- the chuck member 37 and the mounting rod 38 are driven by a driving member 39 and an elastic member 40.
- the elastic member 40 wound around the mounting rod 38 is first in a contracted state.
- the chuck member 37 is separated from the upper die surface 18 as shown in FIG.
- the pre-sealing substrate 4 is supplied between the chuck member 37 and the upper die surface 18 by the transfer means 78.
- the resin material 5 is transferred into the mold 12 by the transfer means 78 together with the pre-sealing substrate 4.
- the resin material 5 supplied to the cavity space 20 is heated to become the molten resin 6.
- the release film 17 is more reliably prevented from being wrinkled by the gravity of the molten resin 6, and is coated along the cavity surface 26.
- the holding portion 33 is a force for holding the entire substrate outer peripheral portion 8 of the substrate 1 with the chuck member 37.
- the substrate outer peripheral portion 8 may be pinched. Further, the substrate 1 may be fixed to the upper die 13 by the positioning holes 42 provided in the substrate outer peripheral portion 8 and the positioning pins inserted therein.
- the upper mold side mold surface 24 comes into contact with the seal member 30.
- the vacuum mechanism sucks the air in the outside air blocking space 21 through the suction / discharge hole 31 communicating with the outside air blocking space 21 in a state where the seal member 30 is compressed.
- the contact portion 53 is inserted into the through hole 44, and contacts the outer peripheral portion 8 of the substrate via the release film 17, as shown in FIG.
- the chip 2 together with the wire 3 is immersed in the molten resin 6 in the cavity space 20.
- the contact portion 53 is in contact with the entire outer periphery 8 of the substrate. Therefore, in the state shown in FIG. 10, the molten resin 6 does not leak onto the outer peripheral portion 8 of the substrate.
- resin sealing of the chip 2 is completed. Thereafter, when a predetermined time elapses, the molten resin 6 in the chip 2 is cured, and the cured resin 10 is formed.
- the lower mold 14 and the intermediate mold 15 move downward in a state where the substrate 11 is separated from the cavity surface 26 after sealing. At this time, the substrate 11 is still mounted on the upper mold surface 18 after sealing.
- the upper mold 13, the lower mold 14, and the intermediate mold 15 are opened.
- the chuck member 37 is separated from the upper die surface 18.
- the transfer means 78 removes the substrate 11 from the upper mold 13 after sealing.
- the substrate 1 according to the second embodiment penetrates between a portion where the wire 3 and the substrate 1 are connected and a portion where the chip 2 and the substrate 1 are in contact with each other.
- a hole 56 is formed.
- the through-hole 56 is filled with the molten resin.
- a release film 57 described later is used. It is.
- the film unit 72 has a mechanism for transporting the release film 57 separately from the transport mechanism for the release film 17 as described later. Have.
- release film 57 is attached to substrate 1 without mounting. It is supplied between the surface 9 and the upper die surface 18 of the upper die 13. The release film 57 moves in a direction perpendicular to the paper in FIGS. 15 and 16, similarly to the release film 17. Also, the non-mounting surface 9 and the release A slight adhesive layer may be provided on the surface of the release film 57 that is in contact with the non-mounting surface 9 so as not to form a gap with the lum 57. In this case, when the substrate 11 is removed from the upper die 13 after sealing, it is necessary to prevent the slightly adhesive layer from remaining on the non-mounting surface 9. When the release film 57 is coated on the non-mounting surface 9, resin sealing may be performed in a state where the release film 57 enters the through-hole 56.
- substrate 1 is supplied between upper mold 13 and intermediate mold 15 with the surface on which chip 2 is mounted facing downward. . Thereafter, the release film 57 is adsorbed to the upper mold surface 18. Next, the non-mounting surface 9 of the substrate 1 is mounted on the upper die surface 18 via the release film 57.
- the molten resin 6 is filled from the vicinity of the chip 2 to the inside of the through hole 56, the molten resin 6 is cured, and the resin sealing is completed. At this time, the molten resin 6 does not leak onto the non-mounting surface 9 due to the presence of the release film 57.
- the suction unit 32 be switched to a state of sucking air and a state of discharging air.
- the air discharged from the air-permeable member 34 pushes the release film 57 against the non-mounting surface 9 of the substrate 1.
- the adhesiveness between the non-mounting surface 9 of the substrate 1 and the release film 57 is further increased, and the possibility that the resin flows over the non-mounting surface 9 is more reliably reduced.
- the same reference numerals as those of the resin sealing molds of Embodiments 1 and 2 are given.
- the portions have the same structures and functions as those of the portions denoted by the same reference numerals described in Embodiments 1 and 2, and therefore, description thereof will not be repeated. Therefore, in the present embodiment, mainly, the resin sealing method and the resin sealing method for the electronic components of the first and second embodiments are described. The difference from the mold used for this will be explained.
- a plurality of chips 2 are provided on one surface, and a substrate before sealing from which wires 3 connected to the other surface force chip 2 protrude. 4 is used.
- a through hole 58 is formed near the position where the substrate 1 and the chip 2 come into contact.
- the substrate 11 after sealing includes a sealing molding portion 7 in which the cured resin 10 enclosing the chip 2 is formed, a sealing molding portion 59 enclosing only the wire 3, and a resin sealing molding. It has a substrate outer peripheral portion 8 that is not mounted and a non-mounting surface 9 on which the chip 2 is not mounted.
- the sealing molding portion 7 on one surface is connected to the sealing molding portion 59 on the other surface through the through hole 58 as shown in FIG. Even resin flows out. After the sealing with the resin, the cured resin 10 is formed on one surface, and the substrate 11 after sealing with the cured resin 62 formed on the other surface is obtained.
- the upper mold 13 of the third embodiment further includes an upper cavity 60 that is provided on the air-permeable member 34 and accommodates the wire 3 that also extends on the other surface of the substrate 1. This is the point that the mold 12 of the present embodiment is different from the mold 12 of the first and second embodiments. As shown in FIG. 18, a cavity forming member 61 having a concave portion corresponding to the position, size, and shape of the wire 3 is inserted into the upper die cavity 60.
- the cavity forming member 61 may not be provided, and the air-permeable member 34 may be formed with a recess for accommodating the wire 3.
- the upper mold surface 60 may be provided with the upper mold cavity 60 without the air-permeable member 34.
- the release film 57 described in the above-described second embodiment is attached to the non-mounting surface 9 of the substrate 1 so that the molten resin 6 does not flow between the upper mold cavity 60 and the non-mounting surface 9 of the substrate 1. And between the upper mold surface 18.
- the resin sealing method for an electronic component first, as shown in FIG. 18, substrate 1 is supplied between upper mold 13 and intermediate mold 15. Next, as shown in FIG. 19, the molten resin 6 is supplied to the cavity space 20. Thereafter, the lower mold 14 and the intermediate mold 15 move toward the upper mold 13 until the outer peripheral portion 8 of the substrate comes into contact with the contact portion 53 of the cavity member 52. As a result, the molten resin 6 flows from the sealing molding portion 7 on one surface to the sealing molding portion 59 on the other surface via the through hole 58. In this case, the cavity forming member 61 A projection (not shown) may be provided on the surface of the cavity forming member 61 so that the molten resin 6 does not go around.
- the resin sealing method of the present embodiment also improves the releasability between the substrate 11 and the cavity 16 after sealing, so that the cured resin 10 is chipped and cracked. Is prevented.
- the resin sealing method of the electronic component according to each of the above-described embodiments is used for resin sealing the wire-bonded chip 2. It can be applied to a flip chip substrate on which is mounted, or a resin sealing method of a resin sealing method for an wafer level package. In this case, the molten resin may be generated using the tablet-shaped resin material 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/562,356 US7618573B2 (en) | 2004-02-13 | 2004-12-22 | Resin sealing method for electronic part and mold used for the method |
DE112004002705T DE112004002705T5 (de) | 2004-02-13 | 2004-12-22 | Harzvergießverfahren für eine elektronische Komponente sowie bei diesem Verfahren verwendetes Formwerkzeug |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-037179 | 2004-02-13 | ||
JP2004037179A JP4373237B2 (ja) | 2004-02-13 | 2004-02-13 | 半導体チップの樹脂封止成形方法および樹脂封止成形用金型 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005077633A1 true WO2005077633A1 (ja) | 2005-08-25 |
Family
ID=34857747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/019164 WO2005077633A1 (ja) | 2004-02-13 | 2004-12-22 | 電子部品の樹脂封止方法およびそれに用いられる金型 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7618573B2 (ja) |
JP (1) | JP4373237B2 (ja) |
KR (2) | KR20070087218A (ja) |
CN (1) | CN100469550C (ja) |
DE (1) | DE112004002705T5 (ja) |
TW (1) | TWI250593B (ja) |
WO (1) | WO2005077633A1 (ja) |
Cited By (1)
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KR101107843B1 (ko) * | 2007-03-13 | 2012-02-09 | 토와 가부시기가이샤 | 전자 부품의 압축 성형 방법 및 그것에 사용되는 장치 |
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Also Published As
Publication number | Publication date |
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KR20070087218A (ko) | 2007-08-27 |
JP2005225133A (ja) | 2005-08-25 |
TW200527555A (en) | 2005-08-16 |
DE112004002705T5 (de) | 2007-09-13 |
US7618573B2 (en) | 2009-11-17 |
KR100844668B1 (ko) | 2008-07-07 |
CN1832839A (zh) | 2006-09-13 |
CN100469550C (zh) | 2009-03-18 |
JP4373237B2 (ja) | 2009-11-25 |
TWI250593B (en) | 2006-03-01 |
US20060186576A1 (en) | 2006-08-24 |
KR20060052812A (ko) | 2006-05-19 |
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