WO2021038785A1 - 支持片の製造方法、半導体装置の製造方法、及び支持片形成用積層フィルム - Google Patents
支持片の製造方法、半導体装置の製造方法、及び支持片形成用積層フィルム Download PDFInfo
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- 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 disclosure is supported and first by a substrate, a first chip arranged on the substrate, a plurality of support pieces arranged on the substrate and around the first chip, and a plurality of support pieces.
- the present invention relates to a method for manufacturing a support piece used in a manufacturing process of a semiconductor device having a dolmen structure including a second chip arranged so as to cover the chip.
- the present disclosure also relates to a method for manufacturing a semiconductor device having a dolmen structure and a laminated film for forming a support piece.
- a dolmen (dolmen) is a kind of stone tomb, and has a plurality of pillar stones and a plate-shaped rock placed on the pillar stone.
- a support piece corresponds to a "dolmen"
- a second chip corresponds to a "plate-shaped rock”.
- Patent Document 1 discloses a semiconductor die assembly including a controller die and a memory die supported by a support member on the controller die. It can be said that the semiconductor assembly 100 illustrated in FIG. 1A of Patent Document 1 has a dolmen structure.
- the semiconductor assembly 100 includes the package substrate 102, the controller dies 103 arranged on the surface of the package substrate 102, the memory dies 106a and 106b arranged above the controller dies 103, and the support members 130a and 130b for supporting the memory dies 106a. To be equipped.
- Patent Document 1 discloses that a semiconductor material such as silicon can be used as a support member (support piece), and more specifically, a fragment of the semiconductor material obtained by dicing a semiconductor wafer can be used (Patent Document 1). 1 [0012], [0014] and FIG. 2).
- a support piece for a dolmen structure using a semiconductor chip for example, the following steps are required as in the case of manufacturing a normal semiconductor chip. (1) A process of attaching a back grind tape to a semiconductor wafer (2) A process of back grinding a semiconductor wafer (3) An adhesive layer and an adhesive layer are applied to a dicing ring and a semiconductor wafer after back grinding arranged therein.
- the process of manufacturing a support piece in the manufacturing process of a semiconductor device having a dolmen structure can be simplified by using a material other than the semiconductor chip (for example, a resin material). ..
- a material other than the semiconductor chip for example, a resin material.
- the present disclosure provides a method for manufacturing a support piece that efficiently manufactures a support piece having excellent visibility by a camera.
- the present disclosure also provides a method for manufacturing a semiconductor device having a dolmen structure, and a laminated film for forming a support piece.
- One aspect of the present disclosure relates to a method of manufacturing a support piece used in a manufacturing process of a semiconductor device having a dolmen structure.
- the method for manufacturing the support piece includes the following steps.
- B) Individual pieces of the support piece forming film A step of forming a plurality of support pieces on the surface of the adhesive layer
- C a step of picking up the support pieces from the adhesive layer.
- the support piece forming film can be made into individual pieces to obtain a support piece.
- the step of manufacturing the support piece can be simplified as compared with the conventional manufacturing method in which a fragment of the semiconductor material obtained by dicing a semiconductor wafer is used as the support piece. That is, while the above-mentioned steps (1) to (6) have been conventionally required, since the support piece forming film does not include the semiconductor wafer, the back grind of the semiconductor wafer (1), (2) and The step (4) can be omitted. In addition, since a semiconductor wafer, which is more expensive than a resin material, is not used, the cost can be reduced.
- the method for manufacturing a support piece it is possible to efficiently manufacture a support piece having excellent visibility by a camera.
- the reason why the visibility by the camera is improved is that, for example, the support piece forming film has a color difference from the base film and the adhesive layer, so that when the support piece forming film is individualized, it is used for forming the support piece. This is considered to be because the optical contrast between the film and the base film and the adhesive layer becomes higher.
- the support piece forming film may be a film composed of a thermosetting resin layer containing a colorant, or may be a multilayer film having a thermosetting resin layer and a resin layer containing a colorant.
- the method for manufacturing a support piece according to the present disclosure may include a step of recognizing the position of the support piece with a camera between the steps (B) and (C).
- the adhesive layer of the laminated film prepared in the step (A) may be a pressure-sensitive type or an ultraviolet curable type. That is, the adhesive layer may or may not be cured by ultraviolet irradiation, in other words, it may or may not contain a resin having a carbon-carbon double bond having photoreactivity. It does not have to be.
- the pressure-sensitive adhesive layer may contain a resin having a carbon-carbon double bond having photoreactivity.
- the adhesive layer may be one in which the adhesiveness of the predetermined region is lowered by irradiating the predetermined region with ultraviolet rays, and for example, a resin having a carbon-carbon double bond having photoreactivity may be used. It may remain.
- the adhesive layer is an ultraviolet curable type, the adhesiveness of the adhesive layer can be reduced by carrying out a step of irradiating the adhesive layer with ultraviolet rays between the steps (B) and (C).
- One aspect of the present disclosure is supported by a substrate, a first chip arranged on the substrate, a plurality of support pieces arranged on the substrate and around the first chip, and a plurality of support pieces.
- the present invention relates to a method for manufacturing a semiconductor device having a dolmen structure including a second chip arranged so as to cover the first chip.
- the method for manufacturing a semiconductor device includes the following steps.
- the step of heating the support piece forming film or the support piece to cure the thermosetting resin layer or the adhesive piece may be carried out at an appropriate timing, for example, may be carried out before the step (G).
- the thermosetting resin layer is already cured to prevent the support pieces from being deformed with the arrangement of the chips with adhesive pieces. it can. Since the thermosetting resin layer has adhesiveness to other members (for example, a substrate), it is not necessary to separately provide an adhesive layer or the like on the support piece.
- the present disclosure is supported by a substrate, a first chip arranged on the substrate, a plurality of support pieces arranged on the substrate and around the first chip, and a plurality of support pieces.
- the present invention relates to a laminated film for forming a support piece used in a manufacturing process of a semiconductor device having a dolmen structure including a second chip arranged so as to cover the first chip.
- the support piece forming laminated film includes a base film, an adhesive layer, and a support piece forming film having a color difference from the base film and the adhesive layer in this order.
- the thickness of the support piece forming film may be, for example, 5 to 180 ⁇ m or 20 to 120 ⁇ m.
- a dolmen structure having an appropriate height with respect to the first chip (for example, a controller chip) can be constructed.
- the support piece forming film may be a film composed of a thermosetting resin layer containing a colorant, or may be a multilayer film having a thermosetting resin layer and a resin layer containing a colorant.
- the support piece forming film may include a thermosetting resin layer.
- the thermosetting resin layer preferably contains, for example, an epoxy resin.
- the method for producing a laminated film for forming a support piece includes a step of preparing an adhesive film having a base film and an adhesive layer formed on one surface of the base film, and a base film and adhesive on the surface of the adhesive layer. It includes a step of laminating a support piece forming film having a color difference from the layer.
- a method for manufacturing a support piece that efficiently manufactures a support piece having excellent visibility by a camera. Further, according to the present disclosure, a method for manufacturing a semiconductor device having a dolmen structure and a laminated film for forming a support piece are provided.
- FIG. 1 is a cross-sectional view schematically showing a first embodiment of a semiconductor device.
- 2 (a), 2 (b), and 2 (c) are plan views schematically showing an example of the positional relationship between the first chip and the plurality of support pieces.
- FIG. 3A is a plan view schematically showing an embodiment of a laminated film for forming a support piece
- FIG. 3B is a cross-sectional view taken along the line bb of FIG. 3A.
- FIG. 4 is a cross-sectional view schematically showing a step of bonding the adhesive layer and the support piece forming film.
- 5 (a), 5 (b), 5 (c), and 5 (d) are cross-sectional views schematically showing an embodiment of a method for manufacturing a support piece.
- FIG. 1 is a cross-sectional view schematically showing a first embodiment of a semiconductor device.
- 2 (a), 2 (b), and 2 (c) are plan views schematically showing an example of the positional relationship between the first chip and the
- FIG. 6A is a plan view schematically showing an embodiment of a support piece forming film after individualization
- FIG. 6B is an enlarged view of a portion E of FIG. 6A. is there.
- FIG. 7 is a cross-sectional view schematically showing a state in which a plurality of support pieces are arranged on the substrate and around the first chip.
- FIG. 8 is a cross-sectional view schematically showing an example of a chip with an adhesive piece.
- FIG. 9 is a cross-sectional view schematically showing a dolmen structure formed on the substrate.
- FIG. 10 is a cross-sectional view schematically showing a second embodiment of the semiconductor device.
- 11 (a) and 11 (b) are cross-sectional views schematically showing other embodiments of a laminated film for forming a support piece.
- (meth) acrylic acid means acrylic acid or methacrylic acid
- (meth) acrylate means acrylate or the corresponding methacrylate
- a or B may include either A or B, or both.
- the term “layer” includes not only a structure having a shape formed on the entire surface but also a structure having a shape partially formed when observed as a plan view.
- the term “process” is used not only as an independent process but also as a term as long as the desired action of the process is achieved even when it cannot be clearly distinguished from other processes. included.
- the numerical range indicated by using "-” indicates a range including the numerical values before and after "-" as the minimum value and the maximum value, respectively.
- the content of each component in the composition is the total amount of the plurality of substances present in the composition unless otherwise specified, when a plurality of substances corresponding to each component are present in the composition. means.
- the exemplary materials may be used alone or in combination of two or more unless otherwise specified.
- the upper limit value or the lower limit value of the numerical range of one step may be replaced with the upper limit value or the lower limit value of the numerical range of another step.
- FIG. 1 is a cross-sectional view schematically showing a first embodiment of a semiconductor device.
- the semiconductor device 100 shown in FIG. 1 includes a substrate 10, a chip T1 (first chip) arranged on the surface of the substrate 10, and a plurality of chips T1 (first chip) arranged on the surface of the substrate 10 and around the chip T1.
- the support piece Dc, the chip T2 (second chip) arranged above the chip T1, the adhesive piece Tc sandwiched between the chip T2 and the plurality of support pieces Dc, and the chip T2 are laminated.
- a stopper 50 is provided.
- a dolmen structure is formed on the substrate 10 by a plurality of support pieces Dc, a chip T2, and an adhesive piece Tc located between the support piece Dc and the chip T2.
- the chip T1 is separated from the adhesive piece Tc.
- the substrate 10 may be an organic substrate or a metal substrate such as a lead frame. From the viewpoint of suppressing the warp of the semiconductor device 100, the thickness of the substrate 10 is, for example, 90 to 300 ⁇ m, and may be 90 to 210 ⁇ m.
- the chip T1 is, for example, a controller chip, which is adhered to the substrate 10 by an adhesive piece Tc and electrically connected to the substrate 10 by a wire w.
- the shape of the chip T1 in a plan view is, for example, a rectangle (square or rectangle).
- the length of one side of the chip T1 is, for example, 5 mm or less, and may be 2 to 5 mm or 1 to 5 mm.
- the thickness of the chip T1 is, for example, 10 to 150 ⁇ m, and may be 20 to 100 ⁇ m.
- the chip T2 is, for example, a memory chip, and is adhered onto the support piece Dc via the adhesive piece Tc. In plan view, the chip T2 has a larger size than the chip T1.
- the shape of the chip T2 in a plan view is, for example, a rectangle (square or rectangle).
- the length of one side of the chip T2 is, for example, 20 mm or less, and may be 4 to 20 mm or 4 to 12 mm.
- the thickness of the chip T2 is, for example, 10 to 170 ⁇ m, and may be 20 to 120 ⁇ m.
- the chips T3 and T4 are also memory chips, for example, and are adhered onto the chip T2 via an adhesive piece Tc.
- the length of one side of the chips T3 and T4 may be the same as that of the chip T2, and the thickness of the chips T3 and T4 may be the same as that of the chip T2.
- the support piece Dc acts as a spacer that forms a space around the chip T1.
- the support piece Dc includes a cured product (cured product of a thermosetting resin composition) of a support piece forming film having a color difference from the base film and the adhesive layer.
- the support piece Dc preferably does not contain a metal layer made of a metal material (for example, copper, nickel, titanium, stainless steel, aluminum, etc.).
- a metal layer made of a metal material (for example, copper, nickel, titanium, stainless steel, aluminum, etc.).
- two support pieces Dc shape: rectangle
- One support piece Dc shape: square, 4 in total
- One support piece Dc (shape: rectangle, total of 4 pieces) may be arranged in each.
- the length of one side of the support piece Dc in a plan view is, for example, 20 mm or less, and may be 1 to 20 mm or 1 to 12 mm.
- the thickness (height) of the support piece Dc is, for example, 10 to 180 ⁇ m, and may be 20 to 120 ⁇ m.
- the manufacturing method according to the present embodiment includes the following steps (A) to (C).
- a support piece forming laminated film 20 (hereinafter, depending on the case) including a base film 1, an adhesive layer 2, and a support piece forming film D having a color difference from the base film 1 and the adhesive layer 2 in this order. Step of preparing "laminated film 20" (see FIGS. 3 and 4)
- C A step of picking up the support piece Da from the adhesive layer 2 (see FIG. 5D).
- the support piece Dc shown in FIG. 1 is after the adhesive piece (thermosetting tree composition) contained therein has been cured.
- the support piece Da is in a state before the adhesive piece (thermosetting tree composition) contained therein is completely cured (see, for example, FIG. 5B).
- steps (A) to (C) are processes for manufacturing a plurality of support pieces Da.
- steps (A) to (C) will be described with reference to FIGS. 3 to 5.
- the step (A) is a step of preparing the laminated film 20.
- the laminated film 20 includes a base film 1, an adhesive layer 2, and a support piece forming film D having a color difference from the base film 1 and the adhesive layer 2.
- the base film 1 is, for example, a polyethylene terephthalate film (PET film).
- the adhesive layer 2 is formed in a circular shape by punching or the like (see FIG. 3A).
- the pressure-sensitive adhesive layer 2 may be made of a pressure-sensitive pressure-sensitive adhesive or an ultraviolet-curable pressure-sensitive adhesive. When the adhesive layer 2 is made of an ultraviolet curable adhesive, the adhesive layer 2 has a property that the adhesiveness is lowered by being irradiated with ultraviolet rays.
- the support piece forming film D is formed in a circular shape by punching or the like, and has a diameter smaller than that of the adhesive layer 2 (see FIG. 3A).
- the support piece forming film D may be made of a thermosetting resin composition.
- thermosetting resin composition constituting the support piece forming film D can be in a semi-cured (B stage) state and then in a completely cured product (C stage) state by a subsequent curing treatment.
- the thermosetting resin composition contains an epoxy resin, a curing agent, and an elastoma (for example, an acrylic resin) from the viewpoint that the shear viscosity can be easily adjusted within a predetermined range and a color difference between the base film and the adhesive layer is exhibited. , A colorant, and if necessary, an inorganic filler, a curing accelerator, and the like may be further contained. Details of the thermosetting resin composition constituting the support piece forming film D will be described later.
- the thickness of the support piece forming film D may be, for example, 5 to 180 ⁇ m or 20 to 120 ⁇ m.
- a dolmen structure having an appropriate height with respect to the first chip (for example, a controller chip) can be constructed.
- the laminated film 20 is, for example, a second laminated film having a base film 1 and an adhesive layer 2 on the surface thereof, and a cover film 3 and a support piece forming film D on the surface thereof. It can be produced by laminating with a film (see FIG. 4).
- the first laminated film is obtained through a step of forming an adhesive layer on the surface of the base film 1 by coating and a step of processing the adhesive layer into a predetermined shape (for example, circular shape) by punching or the like.
- the second laminated film has a step of forming a support piece forming film on the surface of the cover film 3 (for example, PET film or polyethylene film) by coating, and a predetermined shape (for example, by punching the support piece forming film). For example, it is obtained through a process of processing into a circular shape.
- the cover film 3 is peeled off at an appropriate timing.
- the step (B) is a step of forming a plurality of support pieces Da on the surface of the adhesive layer 2 by individualizing the support piece forming film D.
- the dicing ring DR is attached to the laminated film 20. That is, the dicing ring DR is attached to the adhesive layer 2 of the laminated film 20, and the support piece forming film D is arranged inside the dicing ring DR.
- the support piece forming film D is individualized by dicing (see FIG. 5B). As a result, a large number of support pieces Da can be obtained from the support piece forming film D.
- the step (C) is a step of picking up the support piece Da from the adhesive layer 2. As shown in FIG. 5C, the support pieces Da are separated from each other by expanding the base film 1. Next, as shown in FIG. 5D, the support piece Da is peeled off from the adhesive layer 2 by pushing up the support piece Da with the push-up jig 42, and the support piece Da is picked up by suction with the suction collet 44. ..
- FIG. 6A is a plan view schematically showing an embodiment of a film for forming a support piece after individualization
- FIG. 6B is an enlarged view of a portion E of FIG. 6A. is there.
- "visibility by a camera” refers to when the film for forming a support piece after individualization is observed by a camera attached to an apparatus (for example, a die bonder) used for manufacturing a normal semiconductor chip.
- the color of the support piece Da is not particularly limited as long as it can exhibit an optical contrast with these.
- the color of the support piece Da is preferably black because the optical contrast becomes clearer.
- the color of the support piece Da can be adjusted to a desired color by adjusting the components (particularly, the colorant) contained in the thermosetting resin composition described later.
- the method for manufacturing a support piece according to the present embodiment may include a step of recognizing the position of the support piece with a camera between the steps (B) and (C).
- the laminated film 20 includes a base film 1, an adhesive layer 2, and a support piece forming film D having a color difference from the base film 1 and the adhesive layer 2. Therefore, due to the color difference between the support piece forming film and the base film and the adhesive layer, the optical contrast becomes higher, the visibility of the support piece Da by the camera is improved, and the support piece Da is picked up more efficiently. It becomes possible.
- the manufacturing method according to this embodiment includes the following steps (D) to (H).
- G A step of constructing a dolmen structure by arranging a chip T2a with an adhesive piece on the surface of a plurality of support pieces Dc (see FIG. 9).
- steps (D) to (H) are processes in which a dolmen structure is constructed on the substrate 10 by using a plurality of support pieces Da.
- steps (D) to (H) will be described with reference to FIGS. 7 to 9.
- the step (D) is a step of arranging the first chip T1 on the substrate 10. For example, first, the chip T1 is arranged at a predetermined position on the substrate 10 via the adhesive layer T1c. After that, the chip T1 is electrically connected to the substrate 10 by the wire w.
- the step (E) is a step of arranging a plurality of support pieces Da on the substrate 10 around the first chip T1.
- the structure 30 includes a substrate 10, a chip T1 arranged on the surface thereof, and a plurality of support pieces Da.
- the support piece Da may be arranged by crimping. The crimping treatment is preferably carried out, for example, under the conditions of 80 to 180 ° C. and 0.01 to 0.50 MPa for 0.5 to 3.0 seconds.
- the support piece Da may be a support piece Dc in which the adhesive piece 5p contained therein is completely cured at the time of the step (E), and may not be completely cured at this time. It is preferable that the adhesive piece 5p contained in the support piece Da is completely cured before the start of the step (G) to become the adhesive piece 5c.
- the step (F) is a step of preparing the adhesive chip T2a shown in FIG.
- the adhesive piece T2a includes a chip T2 and an adhesive piece Ta provided on the surface of one of the chips T2.
- the chip T2a with an adhesive piece can be obtained through a dicing step and a pick-up step using, for example, a semiconductor wafer and a dicing / die bonding integrated film.
- the step (G) is a step of arranging the chip T2a with the adhesive piece above the chip T1 so that the adhesive piece Ta is in contact with the upper surface of the plurality of support pieces Dc.
- the chip T2 is crimped to the upper surface of the support piece Dc via the adhesive piece Ta.
- This crimping treatment is preferably carried out for 0.5 to 3.0 seconds under the conditions of, for example, 80 to 180 ° C. and 0.01 to 0.50 MPa.
- the adhesive piece Ta is cured by heating. This curing treatment is preferably carried out for 5 minutes or more under the conditions of, for example, 60 to 175 ° C. and 0.01 to 1.0 MPa. As a result, the adhesive piece Ta is cured to become the adhesive piece Tc.
- a dolmen structure is constructed on the substrate 10 (see FIG. 9).
- the chip T3 is placed on the chip T2 via the adhesive piece, and further, the chip T4 is placed on the chip T3 via the adhesive piece.
- the adhesive piece may be any thermosetting resin composition similar to the above-mentioned adhesive piece Ta, and becomes an adhesive piece Tc by heat curing (see FIG. 1).
- the chips T2, T3 and T4 and the substrate 10 are electrically connected by wires w.
- the number of chips stacked above the chip T1 is not limited to the three in this embodiment, and may be appropriately set.
- Step (H) The step (H) is a step of sealing the gap between the chip T1 and the chip T2 with the sealing material 50. Through this step, the semiconductor device 100 shown in FIG. 1 is completed.
- thermosetting resin composition As described above, the thermosetting resin composition constituting the support piece forming film D contains an epoxy resin, a curing agent, an elastomer, and a coloring agent, and if necessary, an inorganic filler, a curing accelerator, or the like. Further includes. -Characteristic 1: When the support piece Da is thermocompression-bonded to a predetermined position on the substrate 10, misalignment is unlikely to occur (the melt viscosity (shear viscosity) of the adhesive piece 5p at 120 ° C.
- -Characteristic 2 The adhesive piece 5c exhibits stress relaxation property in the semiconductor device 100 (the thermosetting resin composition contains an elastomer (rubber component)).
- -Characteristic 3 Die-share strength of a chip with an adhesive piece having a sufficiently high adhesive strength with the adhesive piece Tc (adhesive piece 5c with respect to the adhesive piece Tc (that is, a cured product of a film made of a thermosetting resin layer)). (Share strength) is, for example, 2.0 to 7.0 Mpa or 3.0 to 6.0 Mpa)
- -Characteristic 4 The shrinkage rate due to curing is sufficiently small.
- -Characteristic 5 The adhesive piece 5c has sufficient mechanical strength.
- Epoxy resin The epoxy resin is not particularly limited as long as it is cured and has an adhesive action.
- Bifunctional epoxy resins such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, and bisphenol S type epoxy resin, novolak type epoxy resins such as phenol novolac type epoxy resin and cresol novolac type epoxy resin can be used.
- novolak type epoxy resins such as phenol novolac type epoxy resin and cresol novolac type epoxy resin
- generally known ones such as a polyfunctional epoxy resin, a glycidylamine type epoxy resin, a heterocyclic epoxy resin, and an alicyclic epoxy resin can be applied. These may be used alone or in combination of two or more.
- Examples of the curing agent include phenol resins, ester compounds, aromatic amines, aliphatic amines, acid anhydrides and the like. Of these, phenolic resins are preferable from the viewpoint of achieving high die shear strength (share strength).
- Examples of commercially available phenolic resins include LF-4871 (trade name, BPA novolac type phenol resin) manufactured by DIC Co., Ltd. and HE-100C-30 (trade name, phenylarakil type phenol) manufactured by Air Water Co., Ltd. Resin), Phenolite KA and TD series manufactured by DIC Co., Ltd., Millex XLC-series and XL series manufactured by Mitsui Chemicals Co., Ltd.
- the blending amount of the epoxy resin and the phenol resin is preferably such that the equivalent ratio of the epoxy equivalent and the hydroxyl group equivalent is 0.6 to 1.5, and 0.7 to 0.7, respectively, from the viewpoint of achieving high die shear strength (share strength). It is more preferably 1.4, and even more preferably 0.8 to 1.3. When the compounding ratio is within the above range, it is easy to achieve both curability and fluidity at a sufficiently high level.
- Examples of the elastoma include acrylic resin, polyester resin, polyamide resin, polyimide resin, silicone resin, polybutadiene, acrylonitrile, epoxy-modified polybutadiene, maleic anhydride-modified polybutadiene, phenol-modified polybutadiene, and carboxy-modified acrylonitrile.
- an acrylic resin is preferable as the elastoma, and a functional monomer having an epoxy group such as glycidyl acrylate or glycidyl methacrylate or a glycidyl group as a crosslinkable functional group is polymerized.
- An acrylic resin such as an epoxy group-containing (meth) acrylic copolymer is more preferable.
- an epoxy group-containing (meth) acrylic acid ester copolymer and an epoxy group-containing acrylic rubber are preferable, and an epoxy group-containing acrylic rubber is more preferable.
- the epoxy group-containing acrylic rubber is a rubber having an epoxy group, which is mainly composed of an acrylic acid ester as a main component, a copolymer such as butyl acrylate and acrylonitrile, and a copolymer such as ethyl acrylate and acrylonitrile.
- the acrylic resin may have not only an epoxy group but also a crosslinkable functional group such as an alcoholic or phenolic hydroxyl group or a carboxyl group.
- acrylic resin products examples include SG-70L, SG-708-6, WS-023 EK30, SG-280 EK23, and SG-P3 solvent-modified products manufactured by Nagase Chemtech Co., Ltd. (trade name, acrylic rubber, Weight average molecular weight: 800,000, Tg: 12 ° C., solvent is cyclohexanone) and the like.
- the glass transition temperature (Tg) of the acrylic resin is preferably ⁇ 50 to 50 ° C., more preferably ⁇ 30 to 30 ° C. from the viewpoint of achieving high die shear strength (share strength).
- the weight average molecular weight (Mw) of the acrylic resin is preferably 100,000 to 3 million, more preferably 500,000 to 2 million, from the viewpoint of achieving high die share strength (share strength).
- Mw means a value measured by gel permeation chromatography (GPC) and converted using a calibration curve using standard polystyrene.
- the amount of elastomer contained in the thermosetting resin composition shall be 10 to 200 parts by mass with respect to 100 parts by mass of the total of the epoxy resin and the epoxy resin curing agent from the viewpoint of achieving high die shear strength (share strength). Is preferable, and it is more preferably 20 to 100 parts by mass.
- the colorant is not particularly limited as long as it can exhibit a color difference between the base film and the adhesive layer, and known pigments, dyes and the like can be used. Since the base film is usually white and the adhesive layer is a transparent color, the colorant can be used without particular limitation as long as it is a colorant having a color capable of exhibiting an optical contrast with these.
- the color of the colorant is preferably black, as the optical contrast becomes clearer. Examples of the black colorant include carbon black and the like.
- the amount of the colorant contained in the thermosetting resin composition is 0.1 to 10% by mass with respect to 100 parts by mass of the resin component of the thermosetting resin composition from the viewpoint of expressing a higher color difference from the adhesive layer. It is preferably parts, and more preferably 0.1 to 5 parts by mass.
- inorganic filler examples include aluminum hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, calcium silicate, magnesium silicate, calcium oxide, magnesium oxide, aluminum oxide, aluminum nitride, aluminum borate whisker, boron nitride, and crystals. Examples thereof include sex silica and amorphous silica. These may be used alone or in combination of two or more.
- the average particle size of the inorganic filler is preferably 0.005 ⁇ m to 1.0 ⁇ m, more preferably 0.05 to 0.5 ⁇ m, from the viewpoint of achieving high die shear strength (share strength).
- the surface of the inorganic filler is preferably chemically modified from the viewpoint of achieving high die shear strength (share strength).
- Examples of the material that chemically modifies the surface include a silane coupling agent and the like.
- the functional group of the silane coupling agent include a vinyl group, an acryloyl group, an epoxy group, a mercapto group, an amino group, a diamino group, an alkoxy group, an ethoxy group and the like.
- the content of the inorganic filler is preferably 20 to 200 parts by mass, preferably 30 to 100 parts by mass, based on 100 parts by mass of the resin component of the thermosetting resin composition. It is more preferable that it is a part.
- curing accelerator examples include imidazoles and derivatives thereof, organophosphorus compounds, secondary amines, tertiary amines, quaternary ammonium salts and the like. From the viewpoint of achieving high die shear strength (share strength), imidazole-based compounds are preferable.
- imidazoles include 2-methylimidazole, 1-benzyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole and the like. These may be used alone or in combination of two or more.
- the content of the curing accelerator in the thermosetting resin composition is 0.04 to 3 parts by mass with respect to 100 parts by mass of the total of the epoxy resin and the epoxy resin curing agent from the viewpoint of achieving high die shear strength (share strength). Is preferable, and 0.04 to 0.2 parts by mass is more preferable.
- FIG. 10 is a cross-sectional view schematically showing a second embodiment of the semiconductor device.
- the chip T1 is separated from the adhesive piece Tc, whereas in the semiconductor device 200 according to the present embodiment, the chip T1 is in contact with the adhesive piece Tc. That is, the adhesive piece Tc is in contact with the upper surface of the chip T1 and the upper surface of the support piece Dc.
- the thickness of the support piece forming film D the position of the upper surface of the chip T1 and the position of the upper surface of the support piece Dc can be matched.
- the chip T1 is connected to the substrate 10 by a flip chip instead of wire bonding. If the chip T2 is embedded in the adhesive piece Ta constituting the adhesive piece T2a together with the chip T2, the chip T1 is in contact with the adhesive piece Tc even in the mode in which the chip T1 is wire-bonded to the substrate 10. Can be in the state of
- a support piece forming laminated film 20 including a support piece forming film D made of a thermosetting resin layer containing a colorant has been exemplified.
- the piece-forming laminated film may include a multilayer film having a thermosetting resin layer and a resin layer containing a colorant (a resin layer made of a resin containing a colorant).
- 11 (a) and 11 (b) are cross-sectional views schematically showing other embodiments of a laminated film for forming a support piece.
- thermosetting resin layer 5 has a two-layer film D2 (support piece forming film) having a thermosetting resin layer 5 and a resin layer 6 containing a colorant. That is, in the support piece forming laminated film 20A, the thermosetting resin layer 5 is arranged between the adhesive layer 2 and the resin layer 6 containing the colorant on the outermost surface.
- the thermosetting resin layer 5 may consist of the thermosetting resin composition constituting the support piece forming film D according to the first embodiment, but the thermosetting resin composition contains a colorant. It does not have to be included.
- the thickness of the thermosetting resin layer 5 may be the same as the thickness of the support piece forming film D.
- the thickness of the resin layer 6 containing the colorant is, for example, 5 to 100 ⁇ m, and may be 10 to 90 ⁇ m or 20 to 80 ⁇ m.
- the colorant is not particularly limited as long as it is a colorant having a color capable of exhibiting an optical contrast with these.
- the color of the colorant is preferably black, as the contrast is more pronounced.
- the black colorant the same black colorant as those exemplified above can be exemplified.
- the resin containing a colorant is made of a resin containing a colorant, and can be formed by using a commercially available resin containing a colorant.
- the resin layer containing a black colorant is made of a resin containing a black colorant, and can be formed by using a commercially available resin containing a black colorant.
- the resin containing the black colorant may be, for example, black polyimide because it has sufficient mechanical strength.
- the laminated film 20B for forming a support piece shown in FIG. 11B is a three-layer film D3 having a resin layer 6 containing a colorant and a two-layer thermosetting resin layer 5 sandwiching the resin layer 6 containing a colorant. (Film for forming support pieces).
- the three-layer film D3 is arranged on the surface of the adhesive layer 2.
- the laminated film 20A for forming the support piece contains the resin layer 6 containing the colorant, so that the optical contrast between the film for forming the support piece and the adhesive layer becomes higher, so that the support piece is more visible to the camera. Can be efficiently manufactured.
- the laminated film 20A for forming a support piece can be manufactured, for example, through the following steps. -A step of preparing a laminated film including a base film 1, an adhesive layer 2, and a thermosetting resin layer 5 in this order.-A step of laminating a resin layer 6 containing a colorant on the surface of the laminated film.
- the support piece forming laminated film 20B can be manufactured, for example, by further including a step of providing a thermosetting resin layer 5 on a resin layer 6 containing a colorant in a method for manufacturing the support piece forming laminated film 20A. it can.
- a method for manufacturing a support piece that efficiently manufactures a support piece having excellent visibility by a camera. Further, according to the present disclosure, a method for manufacturing a semiconductor device having a dolmen structure and a laminated film for forming a support piece are provided.
Abstract
Description
(1)半導体ウェハにバックグラインドテープを貼り付ける工程
(2)半導体ウェハをバックグラインドする工程
(3)ダイシングリングとその中に配置されたバックグラインド後の半導体ウェハに対し、粘着層と接着剤層とを有するフィルム(ダイシング・ダイボンディング一体型フィルム)を貼り付ける工程
(4)半導体ウェハからバックグラインドテープを剥がす工程
(5)半導体ウェハを個片化する工程
(6)半導体チップと接着剤片の積層体からなる支持片を粘着層からピックアップする工程
(A)基材フィルムと、粘着層と、基材フィルム及び粘着層と色差を有する支持片形成用フィルムとをこの順序で備える積層フィルムを準備する工程
(B)支持片形成用フィルムを個片化することによって、粘着層の表面上に複数の支持片を形成する工程
(C)粘着層から支持片をピックアップする工程
(D)基板上に第一のチップを配置する工程
(E)基板上であって第一のチップの周囲に上記の製造方法によって得られる複数の支持片を配置する工程
(F)第二のチップと、第二のチップの一方の面上に設けられた接着剤片とを備える接着剤片付きチップを準備する工程
(G)複数の支持片の表面上に接着剤片付きチップを配置することによってドルメン構造を構築する工程
(半導体装置)
図1は、半導体装置の第一実施形態を模式的に示す断面図である。図1に示す半導体装置100は、基板10と、基板10の表面上に配置されたチップT1(第一のチップ)と、基板10の表面上であってチップT1の周囲に配置された複数の支持片Dcと、チップT1の上方に配置されたチップT2(第二のチップ)と、チップT2と複数の支持片Dcとによって挟まれている接着剤片Tcと、チップT2上に積層されたチップT3,T4と、基板10の表面上の電極(不図示)とチップT1~T4とをそれぞれ電気的に接続する複数のワイヤwと、チップT1とチップT2との隙間等に充填された封止材50とを備える。
支持片の製造方法の一例について説明する。本実施形態に係る製造方法は、以下の(A)~(C)の工程を含む。
(A)基材フィルム1と、粘着層2と、基材フィルム1及び粘着層2と色差を有する支持片形成用フィルムDとをこの順序で備える支持片形成用積層フィルム20(以下、場合により「積層フィルム20」という。)を準備する工程(図3、図4参照)
(B)支持片形成用フィルムDを個片化することによって、粘着層2の表面上に複数の支持片Daを形成する工程(図5(b)参照)
(C)粘着層2から支持片Daをピックアップする工程(図5(d)参照)
(A)工程は、積層フィルム20を準備する工程である。積層フィルム20は、基材フィルム1と、粘着層2と、基材フィルム1及び粘着層2と色差を有する支持片形成用フィルムDとを備える。基材フィルム1は、例えば、ポリエチレンテレフタレートフィルム(PETフィルム)である。粘着層2は、パンチング等によって円形に形成されている(図3(a)参照)。粘着層2は、感圧型の粘着剤からなるものであっても、紫外線硬化型の粘着剤からなるものであってもよい。粘着層2が紫外線硬化型の粘着剤からなるものである場合、粘着層2は紫外線が照射されることによって粘着性が低下する性質を有する。支持片形成用フィルムDは、パンチング等によって円形に形成されており、粘着層2よりも小さい直径を有する(図3(a)参照)。支持片形成用フィルムDは、熱硬化性樹脂組成物からなるものであってよい。
(B)工程は、支持片形成用フィルムDを個片化することによって、粘着層2の表面上に複数の支持片Daを形成する工程である。図5(a)に示されるように、積層フィルム20にダイシングリングDRを貼り付ける。すなわち、積層フィルム20の粘着層2にダイシングリングDRを貼り付け、ダイシングリングDRの内側に支持片形成用フィルムDが配置された状態にする。支持片形成用フィルムDをダイシングによって個片化する(図5(b)参照)。これによって、支持片形成用フィルムDから多数の支持片Daが得られる。
(C)工程は、粘着層2から支持片Daをピックアップする工程である。図5(c)に示されるように、基材フィルム1をエキスパンドすることで、支持片Daを互いに離間させる。次いで、図5(d)に示されるように、支持片Daを突き上げ治具42で突き上げることによって粘着層2から支持片Daを剥離させるとともに、吸引コレット44で吸引して支持片Daをピックアップする。
半導体装置100の製造方法について説明する。本実施形態に係る製造方法は、以下の(D)~(H)の工程を含む。
(D)基板10上に第一のチップT1を配置する工程
(E)基板10上であって第一のチップT1の周囲に上記の製造方法によって得られる複数の支持片Daを配置する工程(図7参照)
(F)第二のチップT2と、第二のチップT2の一方の面上に設けられた接着剤片Taとを備える接着剤片付きチップT2aを準備する工程(図8参照)
(G)複数の支持片Dcの表面上に接着剤片付きチップT2aを配置することによってドルメン構造を構築する工程(図9参照)
(H)チップT1とチップT2との隙間等を封止材50で封止する工程(図1参照)
(D)工程は、基板10上に第一のチップT1を配置する工程である。例えば、まず、基板10上の所定の位置に接着剤層T1cを介してチップT1を配置する。その後、チップT1はワイヤwで基板10と電気的に接続される。
(E)工程は、基板10上であって第一のチップT1の周囲に複数の支持片Daを配置する工程である。この工程を経て、図7に示す構造体30が作製される。構造体30は、基板10と、その表面上に配置されたチップT1と、複数の支持片Daとを備える。支持片Daの配置は圧着処理によって行えばよい。圧着処理は、例えば、80~180℃、0.01~0.50MPaの条件で、0.5~3.0秒間にわたって実施することが好ましい。なお、支持片Daは、これに含まれる接着剤片5pが(E)工程の時点で完全に硬化して支持片Dcとなっていてもよく、この時点では完全硬化していなくてもよい。支持片Daに含まれる接着剤片5pは(G)工程の開始前の時点で完全硬化して接着剤片5cとなっていることが好ましい。
(F)工程は、図8に示す接着剤片付きチップT2aを準備する工程である。接着剤片付きチップT2aは、チップT2と、その一方の表面に設けられた接着剤片Taとを備える。接着剤片付きチップT2aは、例えば、半導体ウェハ及びダイシング・ダイボンディング一体型フィルムを使用し、ダイシング工程及びピックアップ工程を経て得ることができる。
(G)工程は、複数の支持片Dcの上面に接着剤片Taが接するように、チップT1の上方に接着剤片付きチップT2aを配置する工程である。具体的には、支持片Dcの上面に接着剤片Taを介してチップT2を圧着する。この圧着処理は、例えば、80~180℃、0.01~0.50MPaの条件で、0.5~3.0秒間にわたって実施することが好ましい。次に、加熱によって接着剤片Taを硬化させる。この硬化処理は、例えば、60~175℃、0.01~1.0MPaの条件で、5分間以上にわたって実施することが好ましい。これによって、接着剤片Taが硬化して接着剤片Tcとなる。この工程を経て、基板10上にドルメン構造が構築される(図9参照)。
(H)工程は、チップT1とチップT2との隙間等を封止材50で封止する工程である。この工程を経て図1に示す半導体装置100が完成する。
支持片形成用フィルムDを構成する熱硬化性樹脂組成物は、上述のとおり、エポキシ樹脂と、硬化剤と、エラストマと、着色料とを含み、必要に応じて、無機フィラー及び硬化促進剤等を更に含む。
・特性1:基板10の所定の位置に支持片Daを熱圧着したとき位置ずれが生じにくいこと(120℃における接着剤片5pの溶融粘度(ずり粘度)が、例えば、4300~50000Pa・s又は5000~40000Pa・sであること)
・特性2:半導体装置100内において接着剤片5cが応力緩和性を発揮すること(熱硬化性樹脂組成物がエラストマ(ゴム成分)を含むこと)
・特性3:接着剤片付きチップの接着剤片Tcとの接着強度が充分に高いこと(接着剤片Tcに対する接着剤片5c(すなわち、熱硬化性樹脂層からなるフィルムの硬化物)のダイシェア強度(シェア強度)が、例えば、2.0~7.0Mpa又は3.0~6.0Mpaであること)
・特性4:硬化に伴う収縮率が充分に小さいこと
・特性5:接着剤片5cが充分な機械的強度を有すること
エポキシ樹脂は、硬化して接着作用を有するものであれば特に限定されない。ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、ビスフェノールS型エポキシ樹脂等の二官能エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂等のノボラック型エポキシ樹脂などを使用することができる。また、多官能エポキシ樹脂、グリシジルアミン型エポキシ樹脂、複素環含有エポキシ樹脂、脂環式エポキシ樹脂等、一般に知られているものを適用することができる。これらは一種を単独で使用してもよいし、二種以上を併用してもよい。
硬化剤としては、例えば、フェノール樹脂、エステル化合物、芳香族アミン、脂肪族アミン、酸無水物等が挙げられる。これらのうち、高いダイシェア強度(シェア強度)を達成する観点から、フェノール樹脂が好ましい。フェノール樹脂の市販品としては、例えば、DIC株式会社製のLF-4871(商品名、BPAノボラック型フェノール樹脂)、エア・ウォーター株式会社製のHE-100C-30(商品名、フェニルアラキル型フェノール樹脂)、DIC株式会社製のフェノライトKA及びTDシリーズ、三井化学株式会社製のミレックスXLC-シリーズとXLシリーズ(例えば、ミレックスXLC-LL)、エア・ウォーター株式会社製のHEシリーズ(例えば、HE100C-30)、明和化成株式会社製のMEHC-7800シリーズ(例えばMEHC-7800-4S)、JEFケミカル株式会社製のJDPPシリーズ、群栄化学工業株式会社製のPSMシリーズ(例えば、PSM-4326)等が挙げられる。これらは一種を単独で使用してもよいし、二種以上を併用してもよい。
エラストマとしては、例えば、アクリル樹脂、ポリエステル樹脂、ポリアミド樹脂、ポリイミド樹脂、シリコーン樹脂、ポリブタジエン、アクリロニトリル、エポキシ変性ポリブタジエン、無水マレイン酸変性ポリブタジエン、フェノール変性ポリブタジエン、カルボキシ変性アクリロニトリルが挙げられる。
無機フィラーとしては、例えば、水酸化アルミニウム、水酸化マグネシウム、炭酸カルシウム、炭酸マグネシウム、ケイ酸カルシウム、ケイ酸マグネシウム、酸化カルシウム、酸化マグネシウム、酸化アルミニウム、窒化アルミニウム、ホウ酸アルミウィスカ、窒化ホウ素、結晶性シリカ、非晶性シリカ等が挙げられる。これらは一種を単独で使用してもよいし、二種以上を併用してもよい。
硬化促進剤としては、例えば、イミダゾール類及びその誘導体、有機リン系化合物、第二級アミン類、第三級アミン類、第四級アンモニウム塩等が挙げられる。高いダイシェア強度(シェア強度)を達成する観点から、イミダゾール系の化合物が好ましい。イミダゾール類としては、例えば、2-メチルイミダゾール、1-ベンジル-2-メチルイミダゾール、1-シアノエチル-2-フェニルイミダゾール、1-シアノエチル-2-メチルイミダゾール等が挙げられる。これらは一種を単独で使用してもよいし、二種以上を併用してもよい。
図10は、半導体装置の第二実施形態を模式的に示す断面図である。第一実施形態に係る半導体装置100はチップT1が接着剤片Tcと離間している態様であるのに対し、本実施形態に係る半導体装置200はチップT1が接着剤片Tcと接している。つまり、接着剤片Tcは、チップT1の上面及び支持片Dcの上面に接している。例えば、支持片形成用フィルムDの厚さを適宜設定することで、チップT1の上面の位置と支持片Dcの上面の位置を一致させることができる。
・基材フィルム1と、粘着層2と、熱硬化性樹脂層5とをこの順序で備える積層フィルムを準備する工程
・上記積層フィルムの表面に着色料を含む樹脂層6を貼り合わせる工程
Claims (9)
- 基板と、前記基板上に配置された第一のチップと、前記基板上であって前記第一のチップの周囲に配置された複数の支持片と、前記複数の支持片によって支持され且つ前記第一のチップを覆うように配置された第二のチップとを含むドルメン構造を有する半導体装置の製造プロセスにおいて使用される支持片の製造方法であって、
(A)基材フィルムと、粘着層と、前記基材フィルム及び前記粘着層と色差を有する支持片形成用フィルムとをこの順序で備える積層フィルムを準備する工程と、
(B)前記支持片形成用フィルムを個片化することによって、前記粘着層の表面上に複数の支持片を形成する工程と、
(C)前記粘着層から前記支持片をピックアップする工程と、
を含む、支持片の製造方法。 - 前記支持片形成用フィルムが着色料を含む熱硬化性樹脂層からなるフィルムである、請求項1に記載の支持片の製造方法。
- 前記支持片形成用フィルムが熱硬化性樹脂層と着色料を含む樹脂層とを有する多層フィルムである、請求項1に記載の支持片の製造方法。
- (B)工程と(C)工程の間に、前記支持片の位置をカメラで認識する工程を含む、請求項1~3のいずれか一項に記載の支持片の製造方法。
- 基板と、前記基板上に配置された第一のチップと、前記基板上であって前記第一のチップの周囲に配置された複数の支持片と、前記複数の支持片によって支持され且つ前記第一のチップを覆うように配置された第二のチップとを含むドルメン構造を有する半導体装置の製造方法であって、
(D)基板上に第一のチップを配置する工程と、
(E)前記基板上であって前記第一のチップの周囲に請求項1~4のいずれか一項に記載の製造方法によって得られる複数の支持片を配置する工程と、
(F)第二のチップと、前記第二のチップの一方の面上に設けられた接着剤片とを備える接着剤片付きチップを準備する工程と、
(G)複数の前記支持片の表面上に前記接着剤片付きチップを配置することによってドルメン構造を構築する工程と、
を含む、半導体装置の製造方法。 - (G)工程よりも前に、前記支持片形成用フィルム又は前記支持片を加熱する工程を含む、請求項5に記載の半導体装置の製造方法。
- 基板と、前記基板上に配置された第一のチップと、前記基板上であって前記第一のチップの周囲に配置された複数の支持片と、前記複数の支持片によって支持され且つ前記第一のチップを覆うように配置された第二のチップとを含むドルメン構造を有する半導体装置の製造プロセスにおいて使用される支持片形成用積層フィルムであって、
基材フィルムと、
粘着層と、
前記基材フィルム及び前記粘着層と色差を有する支持片形成用フィルムと、
をこの順序で備える、支持片形成用積層フィルム。 - 前記支持片形成用フィルムが着色料を含む熱硬化性樹脂層からなるフィルムである、請求項7に記載の支持片形成用積層フィルム。
- 前記支持片形成用フィルムが熱硬化性樹脂層と着色料を含む樹脂層とを有する多層フィルムである、請求項7に記載の支持片形成用積層フィルム。
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JP2021541894A JP7452545B2 (ja) | 2019-08-29 | 2019-08-29 | 支持片の製造方法、半導体装置の製造方法、及び支持片形成用積層フィルム |
KR1020227001967A KR20220042118A (ko) | 2019-08-29 | 2019-08-29 | 지지편의 제조 방법, 반도체 장치의 제조 방법, 및 지지편 형성용 적층 필름 |
PCT/JP2019/033884 WO2021038785A1 (ja) | 2019-08-29 | 2019-08-29 | 支持片の製造方法、半導体装置の製造方法、及び支持片形成用積層フィルム |
TW109129467A TWI833985B (zh) | 2019-08-29 | 2020-08-28 | 支撐片的製造方法、半導體裝置的製造方法及支撐片形成用積層膜 |
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JPH0697215A (ja) * | 1992-09-11 | 1994-04-08 | Hitachi Ltd | 小物品群付貼着シートおよびそれが使用される小物品のピックアップ方法 |
JP2006005333A (ja) * | 2004-05-20 | 2006-01-05 | Toshiba Corp | 積層型電子部品とその製造方法 |
US7859119B1 (en) * | 2003-11-10 | 2010-12-28 | Amkor Technology, Inc. | Stacked flip chip die assembly |
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US9418974B2 (en) | 2014-04-29 | 2016-08-16 | Micron Technology, Inc. | Stacked semiconductor die assemblies with support members and associated systems and methods |
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JPH0697215A (ja) * | 1992-09-11 | 1994-04-08 | Hitachi Ltd | 小物品群付貼着シートおよびそれが使用される小物品のピックアップ方法 |
US7859119B1 (en) * | 2003-11-10 | 2010-12-28 | Amkor Technology, Inc. | Stacked flip chip die assembly |
JP2006005333A (ja) * | 2004-05-20 | 2006-01-05 | Toshiba Corp | 積層型電子部品とその製造方法 |
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CN114270481A (zh) | 2022-04-01 |
KR20220042118A (ko) | 2022-04-04 |
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