WO2010052871A1 - 電子装置の製造方法および電子装置 - Google Patents
電子装置の製造方法および電子装置 Download PDFInfo
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- WO2010052871A1 WO2010052871A1 PCT/JP2009/005770 JP2009005770W WO2010052871A1 WO 2010052871 A1 WO2010052871 A1 WO 2010052871A1 JP 2009005770 W JP2009005770 W JP 2009005770W WO 2010052871 A1 WO2010052871 A1 WO 2010052871A1
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- resin layer
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- resin
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- H—ELECTRICITY
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- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/303—Surface mounted components, e.g. affixing before soldering, aligning means, spacing means
- H05K3/305—Affixing by adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
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Definitions
- the present invention relates to an electronic device manufacturing method and an electronic device.
- a semiconductor device includes a terminal of a support and a terminal of an adherend, for example, a terminal of a semiconductor element and a terminal of another semiconductor element, a terminal of a semiconductor element and a terminal of a substrate, or a terminal of a substrate and a terminal of another substrate.
- adherend for example, a terminal of a semiconductor element and a terminal of another semiconductor element, a terminal of a semiconductor element and a terminal of a substrate, or a terminal of a substrate and a terminal of another substrate.
- a resin layer containing a flux is disposed between the support and the adherend.
- soldering is performed by heating at a temperature equal to or higher than the melting point of the solder. Further, by curing the resin layer, the gap between the solder bonding step and the support and the adherend is filled.
- Patent Document 1 discloses a solder paste containing an epoxy resin as a main component and containing an organic acid or an organic acid salt and solder particles.
- Patent Document 2 discloses at least one thermosetting resin selected from an epoxy resin, a phenol resin, a diallyl phthalate resin, and a benzocyclobutene resin, and a flux component.
- a thermosetting resin sheet characterized by molding a composition containing the above into a sheet shape is disclosed.
- Patent Documents 1 and 2 when the conventional techniques as shown in Patent Documents 1 and 2 are used, there is a problem that voids are generated in the cured product of the cured resin layer.
- the first terminal of the first electronic component and the second terminal of the second electronic component are joined using solder, and the first electronic component and the second electronic component are joined together.
- a method of manufacturing an electronic device to be electrically connected Disposing a resin layer having a flux action between the first terminal and the second terminal to obtain a laminate including the first electronic component, the second electronic component, and the resin layer
- a solder bonding step of soldering the first terminal and the second terminal A pressure curing step of curing the resin layer while pressing the laminate with a pressurized fluid;
- An electronic device manufacturing method is provided.
- a press-hardening process may be implemented, and a press-hardening process may be implemented before a solder joint process. Furthermore, the solder bonding step and the pressure curing step may be performed simultaneously.
- the laminate including the first electronic component, the second electronic component, and the resin layer is pressurized by the pressurized fluid, it is difficult to generate voids in the cured resin layer, and the connection reliability It is possible to provide a method for manufacturing a highly electronic device.
- the pressure curing process is performed.
- the support 1 has a first terminal 3 and solder 5, and the solder 5 is plated on the first terminal 3.
- the adherend 2 has a second terminal 4. Then, in the subsequent process, the first terminal 3 and the second terminal 4 are joined using the solder 5, whereby the support 1 and the adherend 2 are electrically connected.
- the distance between the first terminal 3 and the second terminal 4 is increased while melting the solder 5.
- the soldering is performed by shortening the length and forming a joint between the first terminal 3 and the second terminal 4 (FIG. 4).
- the first terminal 3 and the second terminal 4 are joined by the solder 5 (solder joining step).
- the support 1, the adherend 2, and the resin layer 6 are placed in a heating oven (container) 8, and a pressurized fluid 10 is introduced from a pressurized fluid inlet 9.
- the resin layer 6 is cured while the inside of the heating oven 8 is pressurized with the pressurized fluid 10, that is, while the laminate composed of the support 1, the adherend 2 and the resin layer 6 is pressurized with the pressurized fluid 10.
- the resin layer 6 is cured by heating at a temperature equal to or higher than the temperature (pressure curing step). Accordingly, as shown in FIG.
- the resin layer becomes a cured product of the resin layer 6
- the first terminal 3 and the second terminal 4 are joined using the solder 5, and the support body A material in which the space between 1 and the adherend 2 is filled with the cured product of the resin layer 6 is obtained.
- the said laminated body will be heated with the heater arrange
- the first terminal 3 of the support 1 and the second terminal 4 of the adherend 2 in the method for manufacturing the electronic device are soldered.
- a resin layer arranging step, an alignment step, a solder joining step, and a pressure curing step are sequentially performed. It is a manufacturing method of an electronic device.
- Examples of the substrate used as the support 1 or the adherend 2 include a flexible substrate, a rigid substrate, and a ceramic substrate.
- the support 1 according to the method for manufacturing an electronic device of the first embodiment of the present invention has the first terminal 3, but the shape of the first terminal 3 is not particularly limited, and solder bonding is performed by a solder bonding process. For example, a convex shape or a concave shape may be used.
- the material of the first terminal 3 is not particularly limited, and examples thereof include gold, copper, nickel, palladium, and aluminum.
- the adherend 2 according to the method for manufacturing the electronic device of the first embodiment of the present invention has the second terminal 4, but the shape of the second terminal 4 is not particularly limited, Any shape that can be joined may be used, and examples thereof include a convex shape and a concave shape.
- the material of the second terminal is not particularly limited, and examples thereof include gold, copper, nickel, palladium, and aluminum.
- the solder 5 used for joining the first terminal 3 and the second terminal 4 is not particularly limited, and may be tin, silver, lead, zinc, Examples include alloys containing at least two selected from the group consisting of bismuth, indium and copper. Among these, an alloy containing at least two selected from the group consisting of tin, silver, lead, zinc and copper is preferable.
- the melting point of the solder according to the method for manufacturing the electronic device of the first embodiment of the present invention is 110 to 250 ° C., preferably 170 to 230 ° C.
- solder 5 is solder plating plated on the terminals.
- the solder 5 is: Solder bumps formed by using solder balls or solder paste may be used.
- solder 5 may be provided on the second terminal 4.
- the solder 5 may be provided on each of the first terminal 3 and the second terminal 4.
- the number of the one terminal 3 and the second terminal 4 is not particularly limited.
- the resin layer disposing step according to the method for manufacturing the electronic device of the first embodiment of the present invention includes a resin having a flux action between the first terminal 3 and the second terminal 4 which are joined using the solder 5. This is a step of disposing the layer 6.
- the resin layer 6 having a flux action according to the resin layer arranging step is not particularly limited, and is a thermosetting resin composition used for filling a gap between the support 1 and the adherend 2 in the manufacture of a semiconductor device. It is formed by.
- the minimum melt viscosity at 100 to 200 ° C. of the resin layer 6 having a flux action in the resin layer arranging step is preferably 1 to 10000 Pa ⁇ s, particularly preferably 1 to 1000 Pa ⁇ s, and still more preferably 1 to 500 Pa ⁇ s. It is. Since the minimum melt viscosity at 100 to 200 ° C. of the resin layer 6 having a flux action is 1 Pa ⁇ s or more, generation of voids in the resin layer 6 can be suppressed. On the other hand, when the minimum melt viscosity at 100 to 200 ° C. of the resin layer 6 having a flux action is 10000 Pa ⁇ s or less, the resin composition constituting the resin layer 6 flows and voids generated in the resin layer 6 are generated.
- the minimum melt viscosity is measured, for example, using a rheometer, which is a viscoelasticity measuring device, by applying shear shear with a frequency of 1 Hz to a sample in a film state at a heating rate of 10 ° C./min.
- the resin layer 6 having a flux function related to the resin layer arranging step is a resin layer having a function of removing an oxide film on the surface of the solder 5 at the time of solder joining. Since the resin layer 6 has a flux action, the oxide film covering the surface of the solder 5 is removed in the solder bonding step, so that the solder bonding can be performed. In order for the resin layer 6 to have a flux action, the resin layer 6 needs to contain a compound having a flux action.
- the compound having a flux action contained in the resin layer 6 is not particularly limited as long as it is used for solder joining, but either a carboxyl group or a phenolic hydroxyl group, or both a carboxyl group and a phenolic hydroxyl group.
- the compounding amount of the compound having a flux action in the resin layer 6 is preferably 1 to 30% by weight, and particularly preferably 3 to 20% by weight.
- the flux activity of the resin layer 6 can be improved, and the resin layer 6 is not reacted with the thermosetting resin. It is possible to prevent the compound having the flux action from remaining. In addition, if a compound having an unreacted flux action remains, migration occurs.
- thermosetting resins there are compounds that also have a flux action (hereinafter, such compounds are also referred to as flux active curing agents).
- flux active curing agents phenol novolak resins, cresol novolak resins, aliphatic dicarboxylic acids, aromatic dicarboxylic acids and the like that act as a curing agent for epoxy resins also have a flux action.
- the resin layer 6 containing such a flux active curing agent that acts also as a flux and also acts as a curing agent for the thermosetting resin as a curing agent for the thermosetting resin has a flux function. It is the resin layer which has.
- a compound having a carboxyl group and having a flux action refers to a compound having one or more carboxyl groups in the molecule, and may be liquid or solid.
- the compound having a phenolic hydroxyl group and having a flux action means a compound having one or more phenolic hydroxyl groups in the molecule, and may be liquid or solid.
- the compound having a flux action comprising a carboxyl group and a phenolic hydroxyl group refers to a compound in which one or more carboxyl groups and phenolic hydroxyl groups are present in the molecule, and may be liquid or solid.
- examples of the compound having a carboxyl group-containing flux function include aliphatic acid anhydrides, alicyclic acid anhydrides, aromatic acid anhydrides, aliphatic carboxylic acids, and aromatic carboxylic acids.
- Examples of the aliphatic acid anhydride related to the compound having a flux function having a carboxyl group include succinic anhydride, polyadipic acid anhydride, polyazeline acid anhydride and polysebacic acid anhydride.
- Examples of alicyclic acid anhydrides related to a compound having a carboxyl group and having a flux action include methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, methylhymic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, Examples include alkyltetrahydrophthalic anhydride and methylcyclohexene dicarboxylic acid anhydride.
- Aromatic acid anhydrides relating to compounds having a carboxyl group-containing flux function include phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol bistrimellitate, glycerol tristrimellitic acid. Tate etc. are mentioned.
- Examples of the aliphatic carboxylic acid related to the compound having a flux group having a carboxyl group include a compound represented by the following general formula (1), formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid pivalate, caprylic acid, Examples thereof include lauric acid, myristic acid, palmitic acid, stearic acid, acrylic acid, methacrylic acid, crotonic acid, oleic acid, fumaric acid, maleic acid, oxalic acid, malonic acid, and succinic acid.
- HOOC- (CH 2 ) n —COOH (1) In formula (1), n represents an integer of 0 or more and 20 or less.
- Aromatic carboxylic acids related to the compound having a carboxyl group-containing flux function include benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, hemimellitic acid, trimellitic acid, trimesic acid, merophanic acid, planitic acid, pyromellitic acid , Meritic acid, triylic acid, xylic acid, hemelic acid, mesitylene acid, prenylic acid, toluic acid, cinnamic acid, salicylic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, gentisic acid (2,5 -Dihydroxybenzoic acid), 2,6-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, gallic acid (3,4,5-trihydroxybenzoic acid), 1,4-dihydroxy-2-naphthoic acid, 3 , Naphthoic acid derivatives such as 5-dihydroxy-2-naphtho
- the compound represented by the general formula (1) is preferable.
- the compound in which n in the formula (1) is 3 to 10 can suppress an increase in elastic modulus in the cured resin layer. It is particularly preferable in that the adhesion between the support 1 and the adherend 2 can be improved.
- Examples of the compound having a phenolic hydroxyl group and having a flux action include phenols. Specifically, for example, phenol, o-cresol, 2,6-xylenol, p-cresol, m-cresol, o-ethylphenol.
- the compound having either a carboxyl group or a phenolic hydroxyl group as described above, or both a carboxyl group and a phenolic hydroxyl group is taken in three-dimensionally by reaction with a thermosetting resin such as an epoxy resin.
- the compound having a flux action is a compound having a flux action and acting as a curing agent for the epoxy resin, that is, flux.
- An active curing agent is preferred.
- the flux active curing agent include, in one molecule, two or more phenolic hydroxyl groups that can be added to an epoxy resin, and one or more carboxyls directly bonded to an aromatic group that exhibits a flux action (reduction action). And a compound having a group.
- flux active curing agents examples include 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, gentisic acid (2,5-dihydroxybenzoic acid), 2,6-dihydroxybenzoic acid, 3,4- Benzoic acid derivatives such as dihydroxybenzoic acid and gallic acid (3,4,5-trihydroxybenzoic acid); 1,4-dihydroxy-2-naphthoic acid, 3,5-dihydroxy-2-naphthoic acid, 3,7- Examples thereof include naphthoic acid derivatives such as dihydroxy-2-naphthoic acid; phenolphthaline; and diphenolic acid. These may be used alone or in combination of two or more. Of these, phenolphthaline is preferable from the viewpoint of connection reliability and film formability when the resin layer 6 is formed into a film.
- the blending amount of the flux active curing agent is preferably 1 to 30% by weight, particularly preferably 3 to 20% by weight.
- the flux activity of the resin layer 6 can be improved, and the thermosetting resin and the unreacted flux activity in the resin layer 6 can be improved.
- the curing agent is prevented from remaining. If unreacted flux active curing agent remains, migration may occur.
- the thickness of the resin layer 6 having a flux action is appropriately selected depending on the distance between the support 1 and the adherend 2 after the solder bonding step.
- the resin layer 6 is disposed between the first terminal 3 and the second terminal 4 by covering the surface of the support 1 with the resin layer 6.
- the resin layer 6 covers the surface of the adherend 2, thereby providing a resin between the first terminal 3 and the second terminal 4.
- Layer 6 may be disposed.
- the resin layer arranging step as a method of arranging the resin layer 6 having a flux action between the first terminal 3 and the second terminal 4, for example, 1.
- a resin varnish in which a resin composition containing a compound having a flux action is dissolved or dispersed in a solvent is prepared, and this resin varnish is applied to the surface of the support 1 or the adherend 2 and then in the resin varnish.
- the liquid resin composition which concerns on the method 2 does not contain a solvent.
- the alignment step according to the method for manufacturing the electronic device of the first embodiment of the present invention is performed in the planar direction of the first terminal 3 and the second terminal 4 joined using the solder 5 (in FIG. And the front and back direction of the paper surface).
- the second terminal 4 is embedded in the resin layer 6, Although it has been shown that the distance between the support 1 and the adherend 2 is adjusted so that the tip of the second terminal 4 is in contact with the solder 5, the manufacture of the electronic device according to the first embodiment of the present invention is described.
- the alignment step according to the method since the positional relationship in the planar direction between the first terminal and the second terminal to be joined may be aligned, the first terminal and the second terminal are not necessarily in contact with each other. There is no need, and the first terminal and the second terminal may be separated.
- the second terminal 4 is embedded in the resin layer 6. While the body 2 and the resin layer 6 are heated at 50 to 150 ° C., the second terminal 4 can be embedded in the resin layer 6.
- the solder bonding step according to the method for manufacturing the electronic device of the first embodiment of the present invention includes: (1-I)
- the support 1, the adherend 2 and the resin layer 6 can be soldered to the first terminal 3 and the second terminal 4 in a state where the second terminal 4 is not in contact with the solder 5.
- Heat at a temperature equal to or higher than Then, the step of soldering the first terminal 3 and the second terminal 4 using the solder 5 by shortening the distance between the first terminal 3 and the second terminal 4 or (1-II) in advance
- the first terminal 3 and the second terminal 4 are brought into contact with each other through the solder 5, and the support 1, the adherend 2 and the resin layer 6 are connected to each other between the first terminal 3 and the second terminal 4.
- the first terminal 3 and the second terminal 4 are solder-bonded using the solder 5 by heating at a temperature equal to or higher than the temperature at which solder-bonding is possible.
- a press plate or the like is used so that the distance between the first terminal 3 and the second terminal 4 is further shortened from the state in which the first terminal 3 and the second terminal 4 are in contact with each other.
- the support 1, the adherend 2 and the resin layer 6 may be pressurized.
- the heating temperature of the support 1, the adherend 2 and the resin layer 6 may be a temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered, although it is appropriately selected depending on the metal constituting the solder 5 and the terminals 3 and 4, it is usually 110 to 250 ° C, preferably 170 to 230 ° C.
- the heating time of the laminate including the support 1, the adherend 2 and the resin layer 6 is appropriately selected depending on the type of the solder 5, but is usually 1 to 120 seconds, preferably 1 to 30. Seconds.
- the support 1, the adherend 2 and the resin layer 6 in order to perform solder bonding, the support 1, the adherend 2 and the resin layer 6 must be heated to a temperature equal to or higher than the melting point of the solder. Therefore, in the case of (a), the temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered refers to a temperature equal to or higher than the melting point of the solder. (B) The solder 5 is provided only on one of the first terminal 3 and the second terminal 4, and the solder 5 is not provided on the other, and the solder If the temperature is not equal to or higher than the melting point, the metal constituting the terminal on which the solder 5 is not provided does not form an alloy with the solder.
- the temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered refers to a temperature equal to or higher than the melting point of the solder 5.
- a copper first terminal plated with tin 96.5 / silver 3.5 solder (melting point 221 ° C.) as a solder, and a copper first terminal not plated with solder.
- tin 96.5 / silver 3.5 solder and copper must be at a temperature not lower than the melting point of tin 96.5 / silver 3.5 solder.
- the temperature equal to or higher than the melting point of tin 96.5 / silver 3.5 solder is equal to or higher than the temperature at which solder bonding between the first terminal 3 and the second terminal 4 is possible. It is. (C) When the solder 5 is provided only on one of the first terminal 3 and the second terminal 4 and the solder 5 is not provided on the other, the melting point of the solder 5 When the metal constituting the terminal on which the solder 5 is not provided diffuses to the solder to form an alloy with the solder at a lower temperature, the heating temperature of the support 1, the adherend 2 and the resin layer 6 is increased. Even at a temperature lower than the melting point of the solder 5, solder bonding is possible.
- the temperature above the temperature at which the first terminal 3 and the second terminal 4 can be soldered is the metal constituting the terminal on which the solder 5 is not provided, It refers to the temperature above the temperature at which it diffuses into the solder and forms an alloy with the solder.
- the heating temperature of the support 1, the adherend 2 and the resin layer 6 at the time of solder bonding Is preferably 110 to 250 ° C.
- the solder joining step when the combination of the metal constituting the solder 5 and the terminals 3 and 4 is (a) or (b), (1-I) the support 1, the adherend 2 and the resin layer 6 are The distance between the first terminal 3 and the second terminal 4 is increased while heating at a temperature equal to or higher than the temperature at which the solder bonding between the first terminal 3 and the second terminal 4 is possible, that is, at a temperature higher than the melting point of the solder. shorten. In this case, the distance between the first terminal 3 and the second terminal 4 is shortened by shortening the distance between the support 1 and the adherend 2, but between the support 1 and the adherend 2.
- the compression pressure when compressing the resin layer 6 at this time is 0.01 to 10 MPa, preferably 0.05 to 5 MPa.
- the compression pressure at the time of compressing the resin layer 6 is a load per unit area of the resin layer 6 of the part to be compressed.
- solder joining step when the combination of the solder and the metal constituting the terminal is (c), the first terminal 3 and the second terminal 4 are brought into contact with each other via the solder 5 in the alignment step.
- (1-II) the support 1, the adherend 2 and the resin layer 6 are heated at a temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered. Since the metal constituting the terminal having no solder diffuses into the solder to form an alloy, solder connection is possible without shortening the distance between the first terminal 3 and the second terminal 4 It becomes.
- soldering can be performed by heating with a solder reflow apparatus that does not compress the resin layer 6.
- solder bonding step when the combination of the solder and the metal constituting the terminal is (c), (1-I) the support 1, the adherend 2 and the resin layer 6 are made to have a melting point higher than that of the solder 5. Soldering can also be performed by shortening the distance between the first terminal 3 and the second terminal 4 while heating at a temperature.
- the support can be hardly distorted by performing the solder bonding by the method (1-II) in the solder bonding step. It is difficult for voids to be generated in the object, and solder bonding can be performed more reliably by performing solder bonding by the method (1-I). Therefore, when the combination of the solder and the metal constituting the terminal is the above (c), the solder joining method can be appropriately selected in the solder joining step.
- the heating temperature in the solder bonding process is higher than the curing temperature of the resin layer 6, a part of the resin layer 6 is cured in the solder bonding process.
- the support 1 while pressurizing the laminate including the support 1, the adherend 2 and the resin layer 6 with a pressurized fluid,
- the laminate including the adherend 2 and the resin layer 6 is heated at a temperature equal to or higher than the curing temperature of the resin layer 6 to cure the resin layer 6.
- the support 1, the adherend 2 and the resin layer 6 are included.
- the laminate is directly and evenly pressurized by the pressurized fluid at least from the upper surface side and both side surfaces of the laminate.
- the pressurized fluid related to the pressure curing step means a fluid used to pressurize the laminate, and is not particularly limited.
- a gas such as nitrogen gas, argon gas, or air is preferable and inexpensive.
- air is particularly preferable.
- a liquid can also be used as the pressurized fluid in the pressure curing process.
- the pressure applied when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid, that is, the pressure in the heating oven shown in FIG. -10 MPa, preferably 0.5-5 MPa.
- a void is formed in the resin layer 6 by applying a pressure of 0.1 MPa or more when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid. Even if it occurs, the void can be crushed by pressurization and filled with the resin layer 6, and voids (voids) are hardly generated in the cured product of the resin layer 6. In addition, the occurrence of voids in the resin layer 6 itself can be suppressed.
- an apparatus for pressurizing the laminated body for example, an increase in the size of the heating oven shown in FIG. Can prevent complications.
- pressurizing with a pressurized fluid refers to increasing the pressure of the atmosphere of the laminate including the support 1, the adherend 2 and the resin layer 6 by an applied pressure from atmospheric pressure. . That is, the applied pressure of 10 MPa indicates that the pressure applied to the laminate is 10 MPa greater than the atmospheric pressure.
- the heating temperature of the laminate including the support 1, the adherend 2 and the resin layer 6 may be any temperature as long as it is equal to or higher than the curing temperature of the resin layer 6. 250 ° C., preferably 150 to 200 ° C.
- the heating time of the laminate including the support 1, the adherend 2 and the resin layer 6 is appropriately selected depending on the type of the resin layer 6, but usually 0.5 to 3 hours, preferably Is 1-2 hours.
- the pressure curing step as a method of curing the resin layer 6 while being pressurized with a pressurized fluid, for example, a processing object to be heated in the pressure vessel (the support 1 and the adherend in the pressure curing step). 2 and the resin layer 6), and then, a pressurized fluid is introduced into the pressure vessel (container) so that the internal pressure in the pressure vessel is higher than the atmospheric pressure.
- a pressurized fluid is introduced into the pressure vessel (container) so that the internal pressure in the pressure vessel is higher than the atmospheric pressure.
- the method of heating the object to be processed while pressurizing with pressure more specifically, the object to be processed is placed in a heating oven, and a gas for pressurization is introduced into the heating oven to increase the internal pressure in the heating oven. And a method of heating the object to be processed in a heating oven while pressurizing the laminate with gas.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is preferably 80% or more, particularly preferably 90 to 100%.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is adjusted by appropriately selecting the heating temperature and the heating time in the solder bonding step and the pressure curing step.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is obtained by the following procedure.
- An electronic device manufacturing method for electrically connecting a body 1 and the adherend 2 A resin layer disposing step of disposing a resin layer 6 having a flux action between the first terminal 3 and the second terminal 4 to be joined; An alignment step of aligning the first terminal 3 and the second terminal 4 to be joined; A pressure curing step of curing the resin layer 6 while being pressurized with a pressurized fluid; A solder joining step for solder joining the first terminal 3 and the second terminal 4; This is a method of manufacturing an electronic device in order.
- the process and the alignment process have a support body 1, a first terminal 3, an adherend 2, a second terminal 4, a solder 5, and a flux function according to the manufacturing method of the electronic device of the first embodiment of the present invention. Since it is the same as the resin layer 6, the resin layer arrangement step and the alignment step, the description thereof will be omitted.
- the pressure curing step and the solder bonding step according to the method for manufacturing the electronic device of the second embodiment of the present invention will be described. This will be described with reference to FIGS. 7 to 9 are schematic cross-sectional views showing examples of the pressure curing step and the solder bonding step according to the method for manufacturing an electronic device of the second embodiment of the present invention.
- the support 1, the adherend 2, and the resin layer 6 after the resin layer placement step and the alignment step are installed in a heating oven 8, and are introduced from a pressurized fluid inlet 9. Then, the pressurized fluid 10 is introduced, the inside of the heating oven 8 is pressurized with the pressurized fluid 10, and the support 1, the adherend 2 and the resin layer 6 are heated at a temperature equal to or higher than the curing temperature of the resin layer 6. Thus, the resin layer 6 is cured (pressure curing step). By this, the resin layer 6 hardens
- the cured product of the support 1, the adherend 2, and the resin layer 6 is heated at a temperature equal to or higher than the melting point of the solder 5, while the first terminal 3 and the second terminal 4.
- the distance is shortened, and a joining portion is formed between the first terminal 3 and the second terminal 4 to perform solder joining.
- the first terminal 3 and the second terminal 4 are joined by solder (solder joining step).
- solder bonding step the cured product of the resin layer 6 is heated at a temperature equal to or higher than the melting point of the solder 5 and is further cured depending on the curing rate or the heating temperature.
- the first terminal 3 of the support 1 and the second terminal 4 of the adherend 2 in the method for manufacturing an electronic device are soldered.
- a step of joining the support body 1 and the adherend 2 using a bonding member 5 a resin layer arranging step, an alignment step, a pressure curing step, and a solder joining step are sequentially performed. It is a manufacturing method of an electronic device.
- the support 1, the adherend 2 and the resin layer 6 are brought to a temperature equal to or higher than the curing temperature of the resin layer 6 while being pressurized with a pressurized fluid.
- the resin layer 6 is cured by heating at a temperature of 4 to cure all or part of the resin layer 6.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is determined by whether the non-pressure curing step described later is performed according to the heating temperature and the heating time in the solder bonding step or after the solder bonding step. As appropriate, it is selected.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is preferably 1 to 90%, particularly preferably 5 to 60%. More preferably, it is 10 to 50%.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is preferably 80% or more, particularly preferably 90 to 100%.
- the cured product of the resin layer 6 obtained by performing the pressure curing step by appropriately selecting the heating temperature and heating time of the support 1, the adherend 2 and the resin layer 6 is cured. The rate can be adjusted.
- the curing rate of the cured product of the resin layer 6 obtained by performing the pressure curing step is obtained by the following procedure.
- a resin layer 6 that has not been subjected to heat treatment (that is, the resin layer 6 disposed between the first terminal 3 and the second terminal 4 in the resin layer disposing step) is replaced with a differential scanning calorimeter ( DSC) is used to heat at a measurement temperature range of 25 to 300 ° C. under a temperature rise rate of 10 ° C./min, and the calorific value A2 is measured.
- DSC differential scanning calorimeter
- a resin layer 6 to which the same heat history (heating temperature, heating time) as that in the pressure curing step is added is prepared, heated by the same measuring method, and the heat generation amount B2 at that time is measured.
- the curing rate C2 (%) is calculated by the following formula (3).
- C2 (%) ⁇ (A2-B2) / A2 ⁇ ⁇ 100 (3)
- the heating temperature and heating time of the support 1, the adherend 2 and the resin layer 6 are appropriately selected depending on the degree of cure of the cured product of the resin layer 6 as described above.
- the heating temperature may be a temperature equal to or higher than the curing temperature of the resin layer 6 and is usually 100 to 250 ° C., preferably 150 to 200 ° C.
- the heating time is usually 0.5 to 180 minutes. It is preferably 0.5 to 60 minutes, particularly preferably 1 to 30 minutes.
- the pressurized fluid related to the pressure curing step is the same as the pressurized fluid related to the pressure curing step of the first embodiment.
- the pressure applied when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid is 0.1 to 10 MPa, preferably 0.5 to 5 MPa. .
- voids are formed in the resin layer 6 by applying a pressure of 0.1 MPa or more when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid. Even if it occurs, the void can be crushed by pressurization and filled with the resin layer 6, and voids (voids) are hardly generated in the cured product of the resin layer 6. In addition, the occurrence of voids in the resin layer 6 itself can be suppressed.
- the oven can be prevented from becoming large and complicated.
- the method of curing the resin layer 6 while being pressurized with a pressurized fluid in the pressure curing step is a method of curing the resin layer 6 while being pressurized with a pressurized fluid in the pressure curing step of the first embodiment. It is the same.
- the solder bonding step according to the method for manufacturing the electronic device of the second embodiment of the present invention includes: (2-I) A laminate including the support 1, the adherend 2, and the cured product of the resin layer 6 cured in the pressure curing process in a state where the second terminal 4 is not in contact with the solder 5,
- the first terminal 3 and the second terminal 4 are shortened by using the solder 5 while heating at a temperature equal to or higher than the temperature at which the solder bonding between the terminal 3 and the second terminal 4 is possible. This is a step of soldering the one terminal 3 and the second terminal 4 together.
- the first terminal 3 and the second terminal 4 are brought into contact with each other through the solder 5, and the support 1, the adherend 2, and the resin layer 6 cured in the pressure curing process are cured.
- the laminated body including the object is heated at a temperature equal to or higher than the temperature at which the solder bonding between the first terminal 3 and the second terminal 4 is possible. This is a step of soldering the terminals 4 together.
- a press plate or the like is used so that the distance between the first terminal 3 and the second terminal 4 is further shortened from the state in which the first terminal 3 and the second terminal 4 are in contact with each other.
- the support 1, the adherend 2 and the resin layer 6 may be pressurized.
- solder bonding step the combination of the metal constituting the solder 5 and the terminals (a), (a) above the temperature at which the first terminal 3 and the second terminal 4 can be soldered together. b) and (c) are the same as the description of the solder bonding step of the first embodiment.
- the heating temperature of the support 1, the adherend 2 and the cured product of the resin layer 6 cured by the pressure curing process can be soldered between the first terminal 3 and the second terminal 4.
- the temperature is not lower than the above temperature, and the curing rate of the cured product of the resin layer 6 after the solder bonding step is appropriately selected, but is usually 110 to 250 ° C., preferably 170. ⁇ 230 ° C.
- the heating time of the support 1, the adherend 2 and the cured product of the resin layer 6 cured by the pressure curing process depends on the type of the solder 5 and the curing of the resin layer 6 obtained by performing the solder joining process.
- the curing rate of the product is appropriately selected as long as it exceeds the target value, but it is usually 1 second to 20 minutes, preferably 60 seconds to 15 minutes.
- the solder bonding step when the combination of the solder 5 and the metal constituting the terminal is (a) or (b), (2-I) the support 1, the adherend 2, and the resin cured in the pressure curing step while heating the cured product of the layer 6 at a temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered, that is, at a temperature equal to or higher than the melting point of the solder, The distance of the second terminal 4 is shortened. In this case, the distance between the first terminal 3 and the second terminal 4 is shortened by shortening the distance between the support 1 and the adherend 2, but between the support 1 and the adherend 2.
- the compression pressure when compressing the cured product of the resin layer 6 cured by the pressure curing step at this time is 0.01 to 10 MPa, preferably 0.05 to 5 MPa.
- the compression pressure at the time of compressing the resin layer 6 is a load per unit area of the resin layer 6 of the part to compress.
- solder joining process when the combination of the solder 5 and the metal constituting the terminal is (c), the first terminal 3 and the second terminal 4 are brought into contact with each other via the solder 5 in the positioning process.
- (2-II) the cured product of the support 1, the adherend 2 and the resin layer 6 cured in the pressure curing process is used to solder the first terminal 3 and the second terminal 4. Since the metal constituting the terminal having no solder 5 diffuses into the solder 5 to form an alloy by heating at a temperature higher than the possible temperature, the first terminal 3 and the second terminal Solder connection is possible without shortening the distance 4.
- solder joining can be performed by heating with a solder reflow apparatus that does not compress the cured product of the resin layer 6.
- solder bonding when the combination of the solder 5 and the metal constituting the terminal is (c), (2-I) the support 1, the adherend 2, and the resin layer cured in the pressure curing process. Soldering can also be performed by shortening the distance between the first terminal 3 and the second terminal 4 while heating the cured product 6 at a temperature equal to or higher than the melting point of the solder 5.
- the support 1 is less likely to be distorted by soldering in the method (2-II) in the soldering step.
- voids are less likely to occur in the cured product, and solder bonding can be performed more reliably by performing solder bonding by the method (2-I). Therefore, when the combination of the solder 5 and the metal constituting the terminal is (c), a solder bonding method can be selected as appropriate in the solder bonding step.
- the curing rate of the cured product of the resin layer 6 obtained by performing the soldering step is preferably 30% or more, particularly preferably 60% or more.
- the curing rate of the cured product of the resin layer 6 obtained by performing the soldering step is obtained by the following procedure.
- Resin layer 6 not subjected to heat treatment that is, resin layer 6 disposed on first terminal 3 and second terminal 4 in the resin layer disposing step
- differential scanning calorimeter (DSC) The sample is heated at a measurement temperature range of 25 to 300 ° C. under a temperature increase rate of 10 ° C./min, and the calorific value A3 at that time is measured.
- an uncured portion in a cured product of the resin layer 6 obtained by performing the solder bonding step after the solder bonding step is removed under an atmospheric pressure atmosphere or the like.
- the first terminal 3 of the support 1 and the second terminal 4 of the adherend 2 are joined using solder 5, and the support is supported.
- An electronic device manufacturing method for electrically connecting a body 1 and the adherend 2 A resin layer disposing step of disposing a resin layer 6 having a flux action between the first terminal 3 and the second terminal 4 to be joined; An alignment step of aligning the first terminal 3 and the second terminal 4 to be joined; A first pressure curing step of curing the resin layer 6 while being pressurized with a pressurized fluid; a solder bonding step of soldering the first terminal 3 and the second terminal 4; A second pressure curing step of further curing the resin layer 6 cured in the first pressure curing step while being pressurized with a pressurized fluid; This is a method of manufacturing an electronic device in order.
- the process and the alignment process have a support body 1, a first terminal 3, an adherend 2, a second terminal 4, a solder 5, and a flux function according to the manufacturing method of the electronic device of the first embodiment of the present invention. Since it is the same as the resin layer 6, the resin layer arranging step and the alignment step, the description thereof will be omitted.
- the first pressure curing step, the solder bonding step and the electronic device manufacturing method according to the third embodiment of the invention will be described.
- the second pressure curing step will be described.
- the electronic device manufacturing method uses a solder 5 to connect the first terminal 3 of the support 1 and the second terminal 4 of the adherend 2 in the electronic device manufacturing method.
- a resin layer arranging process, an alignment process, a first pressure curing process, a solder bonding process, and a second pressure application It is the manufacturing method of the electronic device which performs a hardening process in order. That is, in the method of manufacturing the electronic device according to the third embodiment of the present invention, when the resin layer 6 is pressure-cured prior to the solder joint, the cured rate of the obtained resin layer 6 is low.
- the soldering step of the resin layer 6 When the soldering rate of the resin layer 6 becomes lower than the target curing rate even when the soldering is performed, or when it is desired to further increase the curing rate of the cured product of the resin layer 6, the soldering step Thereafter, the resin layer 6 is cured under pressure to a target curing rate by further performing a step of curing the resin layer 6 while being pressurized with a pressurized fluid.
- produces in the hardened
- the support 1, the adherend 2 and the resin layer 6 are cured with the resin layer 6 while being pressurized with a pressurized fluid.
- the resin layer 6 is cured by heating at a temperature equal to or higher than the temperature to cure a part of the resin layer 6.
- the curing rate of the cured product of the resin layer 6 obtained by performing the first pressure curing step is appropriately selected, but is preferably 1 to 90%, preferably Is 5 to 60%, more preferably 10 to 50%.
- the resin layer 6 obtained by performing the first pressure curing step by appropriately selecting the heating temperature and the heating time of the support 1, the adherend 2 and the resin layer 6.
- the curing rate of the cured product can be adjusted.
- cured material of the resin layer 6 obtained by performing a 1st pressure hardening process is manufacture of the electronic device of 2nd embodiment of this invention. In a method, it calculates
- the heating temperature and heating time of the support 1, the adherend 2 and the resin layer 6 depend on how much the curing rate of the cured product of the resin layer 6 is as described above.
- the heating temperature may be any temperature as long as it is not lower than the curing temperature of the resin layer 6 and is usually 100 to 250 ° C., preferably 150 to 200 ° C.
- the heating time is usually 0.5 to 60 minutes, preferably 1 to 30 minutes.
- the pressurized fluid related to the first pressure curing step is the same as the pressurized fluid related to the pressure curing step of the first embodiment.
- the pressure applied when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid is 0.1 to 10 MPa, preferably 0.5 to 5 MPa. It is.
- the pressure applied when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid is 0.1 MPa or more, so Even if voids are generated, the voids can be crushed by pressurization and filled with the resin layer 6, and voids (voids) are hardly generated in the cured product of the resin layer 6. In addition, the occurrence of voids in the resin layer 6 itself can be suppressed.
- the oven can be prevented from becoming large and complicated.
- the resin layer 6 is cured while being pressurized with a pressurized fluid.
- the solder bonding step according to the method for manufacturing the electronic device of the third embodiment of the present invention includes: (3-I) A laminate including the support 1, the adherend 2, and the cured product of the resin layer 6 cured in the first pressure curing step in a state where the second terminal 4 is not in contact with the solder 5. While heating at a temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered together, the distance between the first terminal 3 and the second terminal 4 is shortened. This is a step of soldering the first terminal 3 and the second terminal 4 using.
- the first terminal 3 and the second terminal 4 are brought into contact with each other through the solder 5, and the support 1, the adherend 2, and the resin layer 6 cured in the first pressure curing step.
- the laminated body containing the cured product is heated at a temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered together, so that the first terminal 3 and the second This is a step of soldering the second terminal 4 together.
- a press plate or the like is used so that the distance between the first terminal 3 and the second terminal 4 is further shortened from the state in which the first terminal 3 and the second terminal 4 are in contact with each other.
- the support 1, the adherend 2 and the resin layer 6 may be pressurized.
- (C) is the same as that of the solder joint process of the first embodiment.
- the heating temperature of the cured product of the resin layer 6 obtained by performing the support 1, the adherend 2 and the first pressure curing step is the soldering temperature between the first terminal 3 and the second terminal 4.
- the temperature may be any temperature as long as it is higher than the temperature at which bonding can be performed, and is appropriately selected.
- the heating time of the cured product of the resin layer 6 obtained by performing the support 1, the adherend 2 and the first pressure curing step is appropriately selected depending on the type of solder. Second to 20 minutes, preferably 60 seconds to 15 minutes.
- the solder bonding step when the combination of the solder 5 and the metal constituting the terminal is the above (a) or (b), (3-I) the support 1, the adherend 2 and the first pressure curing step are cured. While heating the cured product of the resin layer 6 at a temperature higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered, that is, at a temperature higher than the melting point of the solder 5, The distance between the terminal 3 and the second terminal 4 is shortened. In this case, the distance between the first terminal 3 and the second terminal 4 is shortened by shortening the distance between the support 1 and the adherend 2, but between the support 1 and the adherend 2.
- the support is obtained by compressing the cured product of the resin layer 6 obtained by performing the first pressure curing step from above and below.
- the distance between 1 and the adherend 2 is shortened, and the distance between the first terminal 3 and the second terminal 4 is shortened.
- the compression pressure when compressing the resin layer 6 at this time is 0.01 to 10 MPa, preferably 0.1 to 1 MPa.
- the compression pressure at the time of compressing the resin layer 6 is a load per unit area of the resin layer 6 of the part to compress.
- the first terminal 3 and the second terminal 4 are brought into contact with each other via the solder 5 in the positioning process.
- (3-II) the support 1, the adherend 2, and the cured product of the resin layer 6 cured in the first pressure curing step are used as the solder between the first terminal 3 and the second terminal 4.
- soldering can be performed by heating with a solder 5 reflow device that does not compress the cured product of the resin layer 6.
- solder bonding process when the combination of the solder 5 and the metal constituting the terminal is the above (c), (3-I) the support 1, the adherend 2, and the first pressure curing process were cured.
- Solder joining can also be performed by shortening the distance between the first terminal 3 and the second terminal 4 while heating the cured product of the resin layer 6 at a temperature equal to or higher than the melting point of the solder 5.
- the support 1 is hardly distorted by performing the solder bonding by the method (3-II) in the solder bonding step.
- solder bonding can be performed more reliably by performing solder bonding by the method (3-I). Therefore, when the combination of the solder 5 and the metal constituting the terminal is (c), a solder bonding method can be selected as appropriate in the solder bonding step.
- the second pressure curing step according to the method of manufacturing the electronic device of the third embodiment of the present invention can be performed by performing the support 1, the adherend 2, and the first pressure curing step while being pressurized with a pressurized fluid.
- the cured product of the resin layer 6 is heated at a temperature equal to or higher than the curing temperature of the resin layer 6 to further cure the resin layer 6 cured by the first pressure curing.
- the heating temperature of the cured product of the resin layer 6 obtained by performing the support 1, the adherend 2 and the first pressure curing step may be a temperature equal to or higher than the curing temperature of the resin layer 6.
- the temperature may be appropriately selected, but is usually 100 to 250 ° C., preferably 150 to 200 ° C.
- the heating time of the support 1, the adherend 2 and the cured product of the resin layer 6 obtained by performing the first pressure curing step is appropriately selected depending on the type of the resin layer 6. However, it is usually 0.5 to 3 hours, preferably 1 to 2 hours.
- the pressurized fluid according to the second pressure curing step is the same as the pressurized fluid according to the pressure curing step of the first embodiment.
- the pressure applied when the cured product of the resin layer 6 obtained by performing the support 1, the adherend 2 and the first pressure curing step with a pressurized fluid is 0.1. -10 MPa, preferably 0.5-5 MPa.
- the pressure applied when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid is set to 0.1 MPa or more, so that Even if voids are generated, the voids can be crushed by pressurization and filled with the resin layer 6, and voids (voids) are hardly generated in the cured product of the resin layer 6. In addition, the occurrence of voids in the resin layer 6 itself can be suppressed.
- the oven can be prevented from becoming large and complicated.
- the method of curing the cured product of the resin layer 6 obtained by performing the first pressure curing step while being pressurized with a pressurized fluid is the pressure curing step of the first embodiment. This is the same as the method of curing the resin layer 6 while being pressurized with a pressurized fluid.
- the curing rate of the cured product of the resin layer 6 obtained by performing the second pressure curing step is preferably 80% or more, particularly preferably 90 to 100%.
- the curing rate of the cured product of the resin layer 6 obtained by performing the second pressure curing step is obtained by the following procedure.
- Resin layer 6 not subjected to heat treatment that is, resin layer 6 disposed on first terminal 3 and second terminal 4 in the resin layer disposing step
- differential scanning calorimeter DSC
- the sample is heated at a measurement temperature range of 25 to 300 ° C. under a temperature increase rate of 10 ° C./min, and the calorific value A4 at that time is measured.
- the first terminal 3 of the support 1 and the second terminal 4 of the adherend 2 are joined using solder 5, and the support is supported.
- An electronic device manufacturing method for electrically connecting a body 1 and the adherend 2 A resin layer disposing step of disposing a resin layer 6 having a flux action between the first terminal 3 and the second terminal 4 to be joined; An alignment step of aligning the first terminal 3 and the second terminal 4 to be joined; While pressurizing the laminated body including the support 1, the adherend 2, and the resin layer 6 with a pressurized fluid, the solder connection between the first terminal 3 and the second terminal 4, and the resin layer 6 Solder joint and pressure curing process that performs curing simultaneously; This is a method of manufacturing an electronic device in order.
- the process and the alignment process have a support body 1, a first terminal 3, an adherend 2, a second terminal 4, a solder 5, and a flux function according to the manufacturing method of the electronic device of the first embodiment of the present invention. Since it is the same as the resin layer 6, the resin layer arrangement step, and the alignment step, the description thereof will be omitted.
- the solder bonding and pressure curing step according to the method for manufacturing the electronic device of the fourth embodiment of the present invention will be described.
- the manufacturing method of the electronic device uses the solder 5 to connect the first terminal 3 of the support 1 and the second terminal 4 of the adherend 2 in the manufacturing method of the electronic device.
- Manufacture of an electronic device in which a resin layer arranging step, a positioning step, and a solder bonding and pressure curing step are sequentially performed as a step of bonding and electrically connecting the support 1 and the adherend 2 Is the method.
- the solder bonding and pressure curing step according to the method for manufacturing the electronic device of the fourth embodiment of the present invention is as follows. (4-III) While pressing the laminated body including the support 1, the adherend 2, and the resin layer 6 with a pressurized fluid while the second terminal 4 is not in contact with the solder 5, the support 1, the adherend The body 2 and the resin layer 6 are heated at a temperature equal to or higher than the curing temperature of the resin layer 6 to cure the resin layer 6. During the curing process, the support 1, the adherend 2, and the resin layer 6 are joined to the first terminal 3 and the second terminal 4 in a pressurized atmosphere for curing the resin layer 6. The laminated body is compressed while being heated at a temperature equal to or higher than the temperature at which it is possible.
- the support 1, the adherend 2, and the resin layer 6 are brought into contact with the first terminal 3 and the second terminal 4 through the solder 5 while being pressurized with a pressurized fluid. Heating is performed at a temperature equal to or higher than a temperature at which the resin layer 6 can be pressure-cured and the first terminal 3 and the second terminal 4 can be soldered together.
- This is a step of simultaneously performing solder bonding between the first terminal 3 and the second terminal 4 and pressure curing of the resin layer 6.
- the distance between the first terminal 3 and the second terminal 4 is further shortened from the state in which the first terminal 3 and the second terminal 4 are in contact with each other.
- the support 1, the adherend 2 and the resin layer 6 may be pressurized using a press plate or the like. Note that, in the solder bonding and pressure curing process, a temperature equal to or higher than a temperature at which the first terminal 3 and the second terminal 4 can be soldered, and a combination of the solder 5 and the metal constituting the terminal (a), (B) and (c) are the same as the description of the solder bonding step of the first embodiment.
- the pressurized fluid related to the solder bonding and pressure curing step is the same as the pressurized fluid related to the pressure curing step of the first embodiment. Also, in the solder bonding and pressure curing process, the method of soldering and curing the resin layer 6 while pressing with a pressurized fluid is performed while pressing with a pressurized fluid in the pressure curing process of the first embodiment. This is the same as the method of curing the resin layer 6.
- the pressure applied when the laminate including the support 1, the adherend 2 and the resin layer 6 is pressurized with a pressurized fluid is 0.1 to 10 MPa, preferably 0.5 to 5 MPa.
- Voids are generated in the resin layer 6 when the pressure applied to the support 1, the adherend 2 and the resin layer 6 with a pressurized fluid is set to 0.1 MPa or more in the solder bonding and pressure curing process. Even if it presses, a void can be crushed and it can fill with the resin layer 6, and it becomes difficult to generate
- the occurrence of voids in the resin layer 6 itself can be suppressed.
- an apparatus for pressurizing the laminate by applying a pressure of 10 MPa or less when pressurizing the support 1, the adherend 2 and the resin layer 6 with a pressurized fluid For example, an increase in size and complexity of the heating oven shown in FIG. 5 can be prevented.
- the support 1 is attached while being pressurized with a pressurized fluid.
- the body 2 and the resin layer 6 are heated at a temperature equal to or higher than the curing temperature of the resin layer 6 to cure the resin layer 6 and in a pressurized atmosphere for curing the resin layer 6 during the curing process.
- the support 1, the adherend 2 and the resin layer 6 are heated at a temperature not lower than the temperature at which the first terminal 3 and the second terminal 4 can be soldered, that is, not lower than the melting point of the solder 5.
- the heating time is appropriately selected depending on the type of the resin layer 6, but usually It is 3 seconds to 120 minutes, preferably 10 seconds to 90 minutes.
- the support 1, the adherend 2 and the resin layer 6 are compressed while being heated at a temperature equal to or higher than the melting point of the solder 5 in a pressurized atmosphere for curing the resin layer 6.
- the operation of shortening the distance between the first terminal 3 and the second terminal 4 by shortening the distance between the support 1 and the adherend 2 is performed. Since there is a resin layer 6 between them, the distance between the support 1 and the adherend 2 is shortened while compressing the resin layer 6 from above and below, so that the first terminal 3 and the second terminal 4 The distance will be shortened.
- the compression pressure when compressing the resin layer 6 at this time is 0.01 to 10 MPa, preferably 0.1 to 1 MPa.
- the compression pressure at the time of compressing the resin layer 6 is a load per unit area of the resin layer 6 of the part to be compressed.
- the solder bonding and pressure curing process when the combination of the solder 5 and the metal constituting the terminal is the above (c), the first terminal 3 and the second terminal 4 are bonded to the solder 5 in the alignment process. (4-IV) while pressurizing with a pressurized fluid, the support 1, the adherend 2 and the resin layer 6 are cured with the resin layer 6 and the first terminal 3 and the second terminal.
- the metal constituting the terminal not having the solder 5 diffuses into the solder 5 to form an alloy. Even if the distance between the terminal 3 and the second terminal 4 is not shortened, the solder 5 can be connected and the resin layer 6 can be pressure-cured.
- the support 1, the adherend 2 and the resin layer 6 can be cured by the resin layer 6 and soldered between the first terminal 3 and the second terminal 4 while being pressurized with a pressurized fluid.
- the heating temperature when heating at a temperature equal to or higher than the temperature may be equal to or higher than the curing temperature of the resin layer 6 and higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered, Usually, the temperature is 110 to 250 ° C., preferably 170 to 230 ° C.
- the heating time is appropriately selected depending on the type of the resin layer 6, but is usually 3 seconds to 120 minutes, preferably 10 seconds to 90 minutes. is there.
- the support 1, the adherend 2 and the resin layer 6 in which the first terminal 3 and the second terminal 4 are brought into contact with each other are placed in the heating oven.
- the resin layer 6 is heated and heated at a temperature equal to or higher than the temperature at which the first terminal 3 and the second terminal 4 can be soldered, whereby the solder joint and the resin layer 6 are heated.
- the second terminal 4 may be embedded in the resin layer 6 while heating the support 1, the adherend 2, and the resin layer 6 before being placed in the heating oven. It is preferable to adjust the distance between the support 1 and the adherend 2 so that the second terminal 4 contacts the solder 5.
- the solder can be reliably joined in the solder joining and resin pressure curing step.
- the second terminal 4 is embedded in the resin layer 6 after alignment, the second terminal 4 is moved to the resin layer while heating the support 1, the adherend 2 and the resin layer 6. 6 can also be embedded.
- the heating temperature is not particularly limited, but is preferably 40 to 250 ° C, particularly preferably 60 to 180 ° C. By setting the heating temperature within the above range, the fluidity of the resin layer can be ensured in the solder bonding and resin pressure curing step, which will be described later, so that the oxide film on the solder surface can be efficiently removed. .
- the second terminal 4 When the second terminal 4 is embedded in the resin layer 6 after alignment, the second terminal 4 is moved to the resin layer while compressing the support 1, the adherend 2 and the resin layer 6. 6 can also be embedded.
- the pressure to be compressed is not particularly limited, but is preferably 0.001 to 10 MPa, and particularly preferably 0.01 to 1 MPa.
- the compression pressure is not particularly limited, but is preferably 0.001 to 10 MPa, and particularly preferably 0.01 to 1 MPa.
- the support 1 and the adherend while being pressurized with a pressurized fluid. 2 and the resin layer 6 are heated at a temperature equal to or higher than the curing temperature of the resin layer 6 to cure the resin layer 6, and in a pressurized atmosphere for curing the resin layer 6 during the curing process.
- the support 1, the adherend 2 and the resin layer 6 are compressed while being heated at a temperature equal to or higher than the melting point of the solder 5 to shorten the distance between the first terminal 3 and the second terminal 4. Bonding and pressure curing of the resin can also be performed.
- the strain of the support 1 is reduced by performing the solder bonding by the method (4-IV) in the solder bonding and pressure curing step. Since it does not easily occur, voids are less likely to occur in the cured product, and solder bonding can be more reliably performed by performing solder bonding by the method (4-III). Therefore, when the combination of the solder 5 and the metal constituting the terminal is (c), the method (III) or (IV) can be appropriately selected in the solder bonding and pressure curing step.
- the adherend 2 is used in a press machine installed in the heating oven 8.
- the method of applying a load from above is mentioned. Specifically, a press machine is installed in the heating oven 8, and the support 1, the adherend 2 and the resin layer 6 are attached to the press machine. Next, the pressurized fluid 10 is introduced to pressurize the heating oven 8.
- the temperature in the heating oven 8 is heated to a temperature equal to or higher than the curing temperature of the resin layer 6, for example, 180 ° C., for example, for 60 minutes to cure the resin layer 6.
- the press surface temperature of the solder 5 is set in a press machine installed in the heating oven 8 in the 180 ° C. pressurized atmosphere.
- a method of connecting the solder 5 by applying a load from above the adherend 2 for 15 seconds at a temperature equal to or higher than the melting point, for example, 230 ° C. can be used.
- the resin layer 6 is cured at the same time as the solder bonding while being pressurized with a pressurized fluid.
- solder bonding may be performed in a pressurized atmosphere. Examples include the following (d) to (f).
- the pressurized fluid those similar to those in the above-described embodiments can be used.
- gases such as nitrogen gas, argon gas, and air are preferable and inexpensive, and the support 1 and the adherend 2 are oxidized.
- the curing rate of the cured product of the resin layer 6 obtained by performing the soldering and pressure curing process is preferably 80% or more, particularly preferably 90 to 100%.
- the curing rate of the cured product of the resin layer 6 obtained by performing the solder bonding and pressure curing step is obtained by the following procedure.
- the resin layer 6 is cured while being pressurized with a pressurized fluid, whereby voids in the resin layer 6 are pressed. Since the resin is cured as it is crushed, voids are hardly generated in the cured product. Since generation
- the pressure fluid is uniformly applied to the laminate including the support 1, the adherend 2 and the resin layer 6 from all directions, so that the melt of the resin layer 6 is It is possible to prevent bleeding from the gap between the support 1 and the adherend 2 to the surroundings.
- the first terminal 3 and the second terminal 4 are solder-bonded before the resin layer 6 is cured, the wetting and spreading of the solder 5 to the second terminal 4 is cured. It is prevented that the resin layer 6 is suppressed.
- the method for manufacturing the electronic device according to the second embodiment of the present invention Since the resin layer 6 is cured while being pressurized with a pressurized fluid, the voids in the resin layer 6 are crushed so that the resin cures. ), And the pressurized fluid uniformly applies pressure to the support 1, the adherend 2 and the resin layer 6 from all directions. And bleeding from the gap between the adherend 2 and the adherend 2 can be prevented.
- the resin layer 6 is cured, and the first terminal 3 and the second terminal 4 are soldered together.
- the solder bonding is performed by curing the resin layer 6 before the solder bonding, it is possible to prevent foaming from occurring in the resin layer 6 and the generation of voids.
- the resin layer 6 is cured to some extent while being pressurized, solder bonding is performed, and the resin layer 6 is cured while being pressurized again, so that wetting and spreading of the solder 5 to the second terminal 4 is prevented. While ensuring, generation
- the pressure applied to the first terminal 3 and the second terminal 4 while pressurizing and heating the resin layer 6 also applies the solder to the second terminal 4.
- the generation of voids can be suppressed while ensuring the wetting and spreading of 5.
- Manufacturing time can be shortened by performing hardening of the resin layer 6 and joining with the 1st terminal 3 and the 2nd terminal 4 simultaneously like 4th embodiment.
- the laminated body is pressurized. By increasing the density of the resin layer 6 by applying pressure and reducing the volume, it is possible to apply a force in the direction in which the first terminal 3 and the second terminal 4 are pressure-bonded.
- the laminate 4 is pressurized with a fluid when the resin layer 6 is cured.
- the laminate is pressed with a press plate or the like, the generation of voids in the resin layer 6 cannot be suppressed, but by pressing the laminate with a fluid, pressure is applied from the top, bottom, left, and right of the resin layer 6, resulting in voids. Is suppressed.
- each component may be a single compound or a combination of a plurality of compounds.
- the resin composition forming the resin layer 6 having a flux action contains a compound having a flux action and a thermosetting resin.
- the resin composition which concerns on this invention can also contain the flux active hardening
- the resin composition according to the present invention may be a solid resin composition or a liquid resin composition.
- thermosetting resin contained in the resin composition according to the present invention is not particularly limited.
- epoxy resin, oxetane resin, phenol resin, (meth) acrylate resin, unsaturated polyester resin, diallyl phthalate resin, maleimide Resins etc. are mentioned, and among these, epoxy resins are preferred.
- Epoxy resins are preferably used because they are excellent in curability and storage stability, heat resistance of cured products, moisture resistance, chemical resistance, and the like.
- the epoxy resin contained in the resin composition according to the present invention may be either an epoxy resin that is solid at room temperature or an epoxy resin that is liquid at room temperature, or both of them.
- the resin composition according to the present invention contains an epoxy resin, the degree of freedom in designing the melting behavior of the resin layer 6 can be further increased.
- the epoxy resin that is solid at room temperature is not particularly limited.
- bisphenol A type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin examples include cresol novolac type epoxy resins, glycidyl amine type epoxy resins, glycidyl ester type epoxy resins, trifunctional epoxy resins, and tetrafunctional epoxy resins. More specifically, those containing both a solid trifunctional epoxy resin and a cresol novolac type epoxy resin may be mentioned, and these may be used alone or in combination of two or more.
- the epoxy resin that is liquid at room temperature is not particularly limited, and examples thereof include bisphenol A type epoxy resins and bisphenol F type epoxy resins. It may be used alone or in combination of two or more.
- the epoxy equivalent of the epoxy resin that is liquid at room temperature is preferably 150 to 300, more preferably 160 to 250, and still more preferably 170 to 220.
- the blending amount of the thermosetting resin is preferably 25 to 75% by weight, particularly preferably 45 to 70% by weight of the constituent material of the resin composition.
- the amount of the thermosetting resin in the resin composition is within the above range, when the thermosetting resin is cured, good curability is obtained, and the design of the good melting behavior of the resin layer 6 is achieved. It becomes possible.
- the resin composition according to the present invention contains a curing agent other than the compound having a flux action.
- hardenability of a thermosetting resin can be improved more.
- the curing agent contained in the resin composition according to the present invention is not particularly limited, and examples thereof include phenols, amines, and thiols.
- the curing agent is preferably a phenol.
- the resin composition according to the present invention contains an epoxy resin as a thermosetting resin, it is possible to obtain good reactivity with the epoxy resin in the resin layer 6 because the curing agent is phenols. Furthermore, the low dimensional change at the time of hardening of the epoxy resin contained in this resin layer 6 and appropriate physical properties (for example, heat resistance, moisture resistance, etc.) after hardening can be obtained.
- the resin composition according to the present invention contains an epoxy resin as a thermosetting resin
- the phenols contained as a curing agent are not particularly limited, but have two or more functional groups capable of reacting with the epoxy resin. Is preferred. Thereby, the characteristic (for example, heat resistance, moisture resistance etc.) of the hardened
- phenols having two or more functional groups capable of reacting with such epoxy resins include, for example, bisphenol A, tetramethylbisphenol A, diallyl bisphenol A, biphenol, bisphenol F, diallyl bisphenol F, and trisphenol. , Tetrakisphenol, phenol novolacs, cresol novolacs, etc., among which phenol novolacs and cresol novolacs are preferred.
- the melt viscosity of the resin layer 6 can be made suitable, and the reactivity with an epoxy resin can be improved.
- the characteristics (for example, heat resistance, moisture resistance, etc.) of the cured epoxy resin in the resin layer 6 can be further improved.
- the amount of the curing agent in the resin composition according to the present invention is 5 to 30% by weight of the constituent material of the resin composition. 10 to 25% by weight is particularly preferable.
- the thermosetting resin can be reliably cured in the resin layer 6 and unreacted with the thermosetting resin in the resin layer 6. It is possible to prevent the occurrence of migration due to the presence of this residual material.
- the blending amount of the phenol novolac resin may be defined by an equivalent ratio with respect to the epoxy resin.
- the equivalent ratio of phenol novolacs to epoxy resin is preferably 0.5 to 1.2, particularly preferably 0.6 to 1.1, and 0.7 to 0.98. More preferably.
- the resin composition according to the present invention can further contain, for example, an imidazole compound having a melting point of 150 ° C. or more as a curing accelerator in addition to the above-described curing agent.
- an imidazole compound having a melting point of 150 ° C. or higher include 2-phenylhydroxyimidazole and 2-phenyl-4-methylhydroxyimidazole.
- fusing point of an imidazole compound For example, it sets suitably according to the heating temperature at the time of hardening of the resin layer 6.
- the blending amount of the curing agent in the resin composition is 0.005 to 10% by weight of the constituent material of the resin composition. Is preferable, and 0.01 to 5% by weight is particularly preferable.
- the blending amount of the curing agent in the resin composition is in the above range, the function of the thermosetting resin as a curing accelerator is more effectively exhibited, and the resin layer 6 has a curability of the thermosetting resin.
- the melt viscosity of the resin layer 6 does not become too high at the temperature at which the solder 5 melts in the resin layer 6, and a good solder joint can be obtained.
- the curing accelerator as described above may be used alone or in combination of two or more.
- the resin composition according to the present invention includes a flux activator for enhancing the activity of a coupling agent, a compound having a flux action, and a resin compatibility, in addition to the compound having a flux action and the thermosetting resin.
- a flux activator for enhancing the activity of a coupling agent for enhancing the activity of a coupling agent
- a compound having a flux action for enhancing the activity of a coupling agent
- a resin compatibility in addition to the compound having a flux action and the thermosetting resin.
- Various additives for improving various properties such as stability and workability may be appropriately contained.
- the adhesion of the resin layer 6 to the support 1 and the adherend 2 can be further enhanced.
- the coupling agent examples include silane coupling agents such as epoxy silane coupling agents and aromatic-containing aminosilane coupling agents, and these may be used alone or in combination of two or more.
- the amount of the silane coupling agent is preferably 0.01 to 5% by weight of the constituent material of the resin composition.
- the resin composition according to the present invention When the resin composition according to the present invention is liquid, the resin composition according to the present invention can be applied to the support 1 or the adherend 2 as it is. When the resin composition according to the present invention is solid, the resin composition according to the present invention is dissolved or dispersed in a solvent to form a resin varnish, and the resin varnish is used as the support 1 or the adherend. 2 can be applied.
- the solvent is not particularly limited, but is preferably inert to the constituent materials of the resin composition as described above.
- acetone methyl ethyl ketone
- Ketones such as methyl isobutyl ketone, DIBK (diisobutyl ketone), cyclohexanone, DAA (diacetone alcohol), aromatic hydrocarbons such as benzene, xylene, toluene, methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butyl alcohol Alcohols such as methyl cellosolve, ethyl cellosolve, butyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, cellosolve such as BCSA (butyrocellosolve acetate), NMP (N-methyl-2-pyrrolidone), THF Tetrahydrofuran), DMF (d
- the resin composition according to the present invention is formed into a film shape to form a film-shaped resin layer 6, and the resin layer 6 is disposed by laminating the film-shaped resin layer 6 on the support 1 or the adherend 2. Can also be done.
- the resin composition according to the present invention further contains a film-forming resin in addition to the compound having a flux action and the thermosetting resin. Is preferred.
- the resin composition according to the present invention contains a film-forming resin, the film-like resin layer 6 can be reliably made into a film-like one.
- film-forming resins examples include (meth) acrylic resins, phenoxy resins, polyester resins, polyurethane resins, polyimide resins, siloxane-modified polyimide resins, polybutadiene, polypropylene, styrene-butadiene-styrene copolymers, and styrene.
- the film forming resin may be a single type or a combination of two or more types.
- the (meth) acrylic resin is a polymer of (meth) acrylic acid and derivatives thereof, or a copolymer of (meth) acrylic acid and derivatives thereof with other monomers. means.
- (meth) acrylic acid etc. it means acrylic acid or methacrylic acid.
- acrylic resin used as the film-forming resin examples include polyacrylic acid, polymethacrylic acid, polymethyl acrylate, polyethyl acrylate, polybutyl acrylate, and poly-2-ethylhexyl acrylate.
- Polyacrylic acid ester polymethyl methacrylate, polyethyl methacrylate, polymethacrylic acid ester such as polybutyl methacrylate, polyacrylonitrile, polymethacrylonitrile, polyacrylamide, butyl acrylate-ethyl acrylate-acrylonitrile copolymer, Acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-acrylic acid copolymer, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, methyl methacrylate-styrene copolymer , Methyl methacrylate-acrylonitrile copolymer, methyl methacrylate- ⁇ -methylstyrene copolymer, butyl acrylate-ethyl acrylate-acrylonitrile-2-hydroxyethyl methacrylate-methacrylic acid copolymer, buty
- an acrylic resin used as a film-forming resin by using a (meth) acrylic resin obtained by copolymerizing a monomer having a functional group such as a nitrile group, an epoxy group, a hydroxyl group, or a carboxyl group, The adhesion of the film-like resin layer 6 to the support 1 and the adherend 2 and the compatibility with the thermosetting resin can be improved.
- the amount of the monomer having the functional group is not particularly limited, but is about 0.1 to 50 mol% with respect to the total weight of the (meth) acrylic resin. It is preferably about 0.5 to 45 mol%, more preferably about 1 to 40 mol%.
- the weight average molecular weight of the acrylic resin is, for example, 1,000 or more and 1,000,000 or less, and preferably 3000 or more and 900,000 or less.
- the film-forming property of the resin composition can be further improved and the fluidity at the time of curing can be ensured.
- a phenoxy resin when used as the film-forming resin, a phenoxy resin having a number average molecular weight of 5000 to 15000 is preferable. By using such a phenoxy resin having a number average molecular weight, the fluidity of the film-like resin layer 6 can be suppressed, and the thickness of the film-like resin layer 6 can be made uniform.
- the skeleton of the phenoxy resin is not particularly limited, and examples thereof include bisphenol A type, bisphenol F type, and biphenyl skeleton type. Among these, a phenoxy resin having a saturated water absorption of 1% or less is preferable. Thereby, generation
- the saturated water absorption rate is obtained by processing a phenoxy resin into a film having a thickness of 25 ⁇ m, drying it in a 100 ° C. atmosphere for 1 hour (an absolutely dry state), and further converting the film into a constant temperature and high humidity layer at 40 ° C. and 90% RH
- the weight change is measured every 24 hours, and the weight at the time when the weight change is saturated can be calculated by the following formula (7).
- Saturated water absorption (%) ⁇ (weight at the time of saturation ⁇ weight at the time of absolute drying) / weight at the time of absolute drying ⁇ ⁇ 100 (7)
- examples of the polyimide resin include those having an imide bond in the repeating unit.
- examples of such a polyimide resin include those obtained by reacting diamine and acid dianhydride and heating and dehydrating and ring-closing the resulting polyamic acid.
- examples of the diamine include aromatic diamines such as 3,3′-dimethyl-4,4′diaminodiphenyl, 4,6-dimethyl-m-phenylenediamine, 2,5-dimethyl-p-phenylenediamine, and siloxane diamine.
- 1,3-bis (3-aminopropyl) -1,1,3,3-tetramethyldisiloxane and the like may be used alone or in combination of two or more.
- the acid dianhydride include 3,3,4,4'-biphenyltetracarboxylic acid, pyromellitic dianhydride, 4,4'-oxydiphthalic dianhydride, and the like.
- Such a polyimide resin may be soluble or insoluble in the solvent described later, but is preferably soluble in the solvent. Since the polyimide resin is soluble in the solvent, the phase solubility with the constituent material contained in the solution material is improved, so that the handling is excellent.
- the siloxane-modified polyimide resin is preferably used because it can be dissolved in various solvents.
- the film-forming resin may be a commercial product.
- the resin composition according to the present invention when used after being formed into a film, the resin composition according to the present invention can be used in various plasticizers, stabilizers, inorganic fillers, antistatic agents and pigments as long as the effects are not impaired. Additives such as can be included.
- the amount of the film-forming resin in the resin composition according to the present invention is preferably 5 to 45% by weight of the constituent material of the resin composition.
- the blending amount of the film-forming resin in the resin composition according to the present invention is within the above range, the film-like resin layer 6 in the cured film-like resin layer 6 is suppressed while suppressing a decrease in film-formability. An increase in elastic modulus can be suppressed. As a result, the adhesiveness between the film-like resin layer 6, the support 1 and the adherend 2 can be further improved. Furthermore, an increase in the melt viscosity of the film-like resin layer 6 can be suppressed.
- the resin composition according to the present invention contains a thermosetting resin, and such a thermosetting resin is not particularly limited. Although it is not, it is preferable to contain an epoxy resin.
- the epoxy resin refers to any of a monomer, an oligomer and a polymer having an epoxy group.
- the epoxy resin include, for example, novolak type epoxy resins such as phenol novolak type epoxy resin and cresol novolak type epoxy resin; bisphenol type epoxy resins such as bisphenol A type epoxy resin and bisphenol F type epoxy resin; hydroquinone type epoxy resin Biphenyl type epoxy resin; stilbene type epoxy resin; triphenolmethane type epoxy resin; triazine nucleus-containing epoxy resin; dicyclopentadiene modified phenol type epoxy resin; naphthol type epoxy resin and phenol aralkyl type having phenylene and / or biphenylene skeleton Epoxy resins, aralkyl type epoxy resins such as naphthol aralkyl type epoxy resins having a phenylene and / or biphenylene skeleton, and others Or higher functional epoxy resins.
- novolak type epoxy resins such as phenol novolak type epoxy resin and cresol novolak type epoxy resin
- bisphenol type epoxy resins such as bisphenol A type epoxy resin and bisphenol F type epoxy resin
- the content of the epoxy resin contained in the resin composition according to the present invention is although not particularly limited, it is preferably 10 to 90% by weight, particularly preferably 20 to 80% by weight.
- the content of the epoxy resin contained in the resin composition is in the above range, a low linear expansion coefficient and toughness after curing of the film-like resin layer 6 can be compatible.
- the softening point of the epoxy resin contained in the resin composition according to the present invention is As long as it has compatibility with the film-forming resin, it is not particularly limited, but is preferably 40 to 100 ° C., particularly preferably 50 to 90 ° C.
- the tack property of the film-form resin layer 6 can be reduced, Therefore The workability
- the raise of the melt viscosity of the film-form resin layer 6 can be suppressed by setting it as the said upper limit or less.
- the resin composition according to the present invention is not particularly limited. It is preferable to contain a curing agent.
- curing agent should just act as a hardening
- polyamines including aliphatic polyamines such as diethylenetriamine, triethylenetetramine, metaxylylenediamine, aromatic polyamines such as diaminodiphenylmethane, m-phenylenediamine, and diaminodiphenylsulfone, dicyandiamide, and organic acid dihydrazide.
- Amine-based curing agents such as compounds, aliphatic acid anhydrides such as hexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, aromatic acid anhydrides such as tritometic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic acid, etc.
- Acid anhydride curing agent phenol novolac resin, cresol novolac resin, phenol aralkyl (including phenylene and biphenylene skeleton) resin, naphthol aralkyl (including phenylene and biphenylene skeleton) resin
- Triphenol methane resin dicyclopentadiene type phenol resin, bis (mono- or di-t-butylphenol) propane, methylene bis (2-propenyl) phenol, propylene bis (2-propenyl) phenol, bis [(2-propenyloxy) phenyl] Methane, bis [(2-propenyloxy) phenyl] propane, 4,4 ′-(1-methylethylidene) bis [2- (2-propenyl) phenol], 4,4 ′-(1-methylethylidene) bis [ 2- (1-phenylethyl) phenol], 4,4 ′-(1-methylethylidene) bis [2-methyl-6-hydroxy
- the content of the curing agent in the resin composition according to the present invention is epoxy It is obtained by calculating the equivalent ratio of the epoxy equivalent of the resin and the curing agent.
- the equivalent ratio of the epoxy equivalent of the epoxy resin to the functional group of the curing agent is preferably 0.5 to 1.5, particularly preferably 0.7 to 1.3.
- the resin composition according to the present invention may contain a curing accelerator.
- a curing accelerator may be selected as long as it accelerates the curing reaction between the epoxy resin and the curing agent.
- Specific examples include amine compounds such as imidazoles and 1,8-diazabicyclo (5,4,0) undecene, and phosphorus compounds such as salts of triphenylphosphine and tetra-substituted phosphonium with polyfunctional phenol compounds.
- imidazoles and phosphorus compounds that achieve both the fast curing property of the film-like resin layer 6, the storage stability, and the corrosiveness of the aluminum pad on the semiconductor element are preferable.
- the content of the curing accelerator in the resin composition of the present invention is 0. 0.001 to 10% by weight is preferable, and 0.01 to 5% by weight is particularly preferable. By setting it as the said range, it becomes possible to maintain the balance of the quick-hardening property and preservability of the film-like resin layer 6, and the property after hardening.
- an imidazole compound having a melting point of 150 ° C. or higher is preferable, and examples thereof include 2-phenylhydroxyimidazole, 2-phenyl-4-methylhydroxyimidazole, 2-phenyl-4-methylimidazole and the like. .
- phosphorus compounds as curing accelerators, tetra-substituted phosphonium and many more excellent in the fast curing property of the film-like resin layer 6, the corrosiveness to the aluminum pad of the semiconductor element, and the storability of the film-like resin layer 6.
- Particularly preferred are salts with functional phenol compounds.
- the salt of tetra-substituted phosphonium and a polyfunctional phenol compound is not a simple mixture but a compound having a structure such as a salt structure or a supramolecular structure.
- the tetra-substituted phosphonium salt of the tetra-substituted phosphonium and the polyfunctional phenol compound is preferably a compound in which four alkyl groups or aromatic compounds are coordinated to the phosphorus atom from the balance between curability and storage stability of the film.
- the substituents of the tetra-substituted phosphonium are not particularly limited, and may be the same or different from each other, and a tetra-substituted phosphonium ion having a substituted or unsubstituted aryl group or alkyl group as a substituent is heated. It is stable and preferred for hydrolysis.
- tetra-substituted phosphonium examples include tetraphenylphosphonium, tetratolylphosphonium, tetraethylphenylphosphonium, tetramethoxyphenylphosphonium, tetranaphthylphosphonium, tetrabenzylphosphonium, ethyltriphenylphosphonium, n-butyltriphenylphosphonium, 2-hydroxyethyl.
- examples thereof include triphenylphosphonium, trimethylphenylphosphonium, methyldiethylphenylphosphonium, methyldiallylphenylphosphonium, tetra-n-butylphosphonium and the like.
- tetraphenylphosphonium is preferable from the balance of fast curing properties and storage stability.
- the polyfunctional phenol compound of the molecular compound of the tetra-substituted phosphonium and the polyfunctional phenol compound is a compound having a phenolic hydroxyl group, and at least one of the hydroxyl groups is removed to form a phenoxide type compound.
- Specific examples include a hydroxybenzene compound, a biphenol compound, a bisphenol compound, a hydroxynaphthalene compound, a phenol novolac resin, and a phenol aralkyl resin.
- polyfunctional phenol compound examples include bis (4-hydroxy-3,5-dimethylphenyl) methane (common name: tetramethylbisphenol F), 4,4′-sulfonyldiphenol, and 4,4′-isopropylidenediphenol.
- bisphenol A bis (4-hydroxyphenyl) methane, bis (2-hydroxyphenyl) methane, (2-hydroxyphenyl) (4-hydroxyphenyl) methane and bis (4-hydroxyphenyl) methane
- Bisphenols such as bis (2-hydroxyphenyl) methane and (2-hydroxyphenyl) (4-hydroxyphenyl) methane as a mixture of three kinds (for example, bisphenol FD manufactured by Honshu Chemical Industry Co., Ltd.), 1 , 2-benzenediol, 1,3-benzenediol, 1, -Dihydroxybenzenes such as benzenediol, trihydroxybenzenes such as 1,2,4-benzenetriol, various isomers of dihydroxynaphthalene such as 1,6-dihydroxynaphthalene, 2,2'-biphenol, 4,4 Examples of the compound include various isomers of biphenols such as' -biphenol, and 1,2-dihydroxynaphthalene and 4,4'-sul
- such a film-like resin layer 6 includes, for example, a compound having a flux action and a thermosetting resin, and if necessary, a film-forming property.
- a resin and other components are dissolved in a solvent to prepare a film-like resin layer 6 forming material (liquid material), and then the film-like resin layer 6 forming material is peeled off from a polyester sheet or the like. It is obtained by applying onto a treated substrate, removing the solvent at a predetermined temperature, and drying.
- a solvent used for preparation of the film-form resin layer 6 formation material for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, DIBK (diisobutyl ketone) , Ketones such as cyclohexanone and DAA (diacetone alcohol), aromatic hydrocarbons such as benzene, xylene and toluene, alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol and n-butyl alcohol, methyl cellosolve, ethyl cellosolve Cellosolve such as butyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, BCSA (butyrocellosolve acetate), NMP (N-methyl-2-pyrrolidone), THF (tetrahydrofuran), DMF (dimethylformamide), DBE (dibasic acid) Ester), EEP
- the thickness (average) of the film-like resin layer 6 is not particularly limited, but is preferably about 3 to 100 ⁇ m, and more preferably about 5 to 50 ⁇ m.
- the present invention is based on the following invention.
- a method A resin layer arranging step of arranging a resin layer having a flux action between the first terminal and the second terminal to be joined; An alignment step for aligning the first terminal and the second terminal to be joined; A solder bonding step of soldering the first terminal and the second terminal; A pressure curing step of curing the resin layer while being pressurized with a pressurized fluid; A method of manufacturing an electronic component, wherein the steps are performed in order.
- [4] Manufacture of an electronic component in which the first terminal of the support and the second terminal of the adherend are joined using solder to electrically connect the support and the adherend.
- a method A resin layer arranging step of arranging a resin layer having a flux action between the first terminal and the second terminal to be joined; An alignment step for aligning the first terminal and the second terminal to be joined; Solder bonding and pressure curing step of simultaneously performing solder bonding between the first terminal and the second terminal and curing of the resin layer while being pressurized with a pressurized fluid; A method of manufacturing an electronic component, wherein the steps are performed in order.
- the pressure curing step and the first pressure curing are performed by placing the treatment object in a pressure vessel and heating the treatment object while pressurizing the pressure vessel with the pressurized fluid.
- the pressure of the pressurized fluid is 0.1 to 10 MPa.
- a circuit board on which a circuit pattern is formed (as a core material, manufactured by Sumitomo Bakelite Co., Ltd., product number ELC-4785GS, coefficient of thermal expansion (Tg or less) XY direction: 11 ppm, Z direction: 16 ppm) is used.
- the circuit board used was one in which solder 5 bumps (Sn96.5Ag3.5) were formed on the first terminal.
- the number of the first terminal of the support and the second terminal of the adherend was 100 pairs.
- Example 1 Production of film-like resin layer 45 parts by weight of cresol novolac type epoxy resin EOCN-102070 (manufactured by Nippon Kayaku Co., Ltd.) as an epoxy resin, 10 parts by weight of PR-53467 (manufactured by Sumitomo Bakelite Co., Ltd.) as a phenol novolac resin, and acrylic rubber SG-708-6 (manufactured by Nagase ChemteX Corporation) 20 parts by weight, acrylic polymer UC-3900 (manufactured by Toagosei Co., Ltd.) 10 parts by weight, and phenolphthaline (as a compound having a flux action) 15 parts by weight of Tokyo Kasei Co., Ltd.), 0.5 parts by weight of KBM-303 (Shin-Etsu Silicone Co., Ltd.) as a silane coupling agent, and 2P4MZ (manufactured by Shikoku Kasei Co., Ltd.) as an imid
- the varnish-like resin composition obtained above is applied to a polyester sheet (base material) using a comma coater, dried at a temperature of 100 ° C. for 3 minutes at which the acetone volatilizes, and formed on the base material.
- a 35 ⁇ m film-shaped resin layer (a) was obtained.
- the film-like resin layer (a) formed on the substrate is laminated on the surface of the circuit board on which the solder 5 bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. Subsequently, the base material was peeled off (resin layer arranging step). Next, alignment is performed so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, and at 80 ° C. and 0.05 MPa using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.). Then, heat compression was performed for 7 seconds to obtain a laminate (positioning step). Next, the laminate was heated and compressed at 230 ° C.
- Example 1 The electronic device obtained in Example 1 was evaluated as follows. The evaluation items are shown together with the contents, and the obtained results are shown in Table 1. 1. Measurement of Conductive Connection For the obtained electronic device, the connection resistance of two arbitrarily selected solder joints was measured with a digital multimeter. Next, 9 other points and two adjacent solder joints were arbitrarily selected. Similarly, the connection resistance was measured, and a total of 10 conductive connections were measured. Each code is as follows. ⁇ : When conduction is obtained at all 10 points ⁇ : When conduction failure is found even at 1 point Presence or absence of microvoids in the cured product between the support and the adherend The obtained electronic device was cut and the cross section of the cured product was polished.
- Example 2 (Production and evaluation of electronic devices) An electronic device was produced and evaluated in the same manner as in Example 1 except that the heat compression time in the solder bonding process was changed from 5 seconds to 15 seconds.
- Example 3 (Production and evaluation of electronic devices) An electronic device was fabricated and evaluated in the same manner as in Example 1 except that the heat compression time in the solder bonding process was changed from 5 seconds to 115 seconds.
- Example 4 (Production of film-like resin layer) 45 parts by weight of bisphenol A type epoxy resin EPICLON-840S (manufactured by Dainippon Ink and Chemicals) as an epoxy resin, 15 parts by weight of PR-53467 (manufactured by Sumitomo Bakelite Co., Ltd.) as a phenol novolac resin, and phenoxy resin 25 parts by weight of YP-50 (manufactured by Toto Kasei Co., Ltd.), 15 parts by weight of phenolphthaline (manufactured by Tokyo Chemical Industry Co., Ltd.) as a compound having a flux action, and KBM-303 (as a silane coupling agent) 0.5 parts by weight of Shin-Etsu Silicone Co., Ltd.) and 0.01 parts by weight of 2P4MZ (manufactured by Shikoku Kasei Co., Ltd.) as an imidazole compound were dissolved in acetone to prepare a varnish-like resin composition.
- the varnish-like resin composition obtained above is applied to a polyester sheet (base material) using a comma coater, dried at a temperature of 100 ° C. for 3 minutes at which the acetone volatilizes, and formed on the base material.
- a 35 ⁇ m film-like resin layer (b) was obtained.
- an electronic device was produced and evaluated in the same manner as in Example 2 except that the film resin layer (b) was used instead of the film resin layer (a).
- Example 5 (Production of film-like resin layer) A film-like resin layer (b) was obtained in the same manner as in Example 4. (Production and evaluation of electronic devices) The film-like resin layer (b) formed on the substrate is laminated on the surface of the circuit board on which the solder 5 bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off (resin layer arranging step). Alignment so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.) at 80 ° C. and 0.05 MPa for 7 seconds.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- Heat compression was performed to obtain a laminate (positioning step).
- the inside of the oven was pressurized with air at a pressure of 0.5 MPa (the laminate was pressurized at 0.5 MPa) and heated at 180 ° C. for 60 minutes (pressure curing). Process).
- the laminate was heated and compressed for 15 seconds at 230 ° C. and 0.2 MPa using a flat plate press (MSA-2, manufactured by System Development Co., Ltd.), and soldered (solder joining process) to produce an electronic device. . Subsequently, evaluation similar to Example 1 was implemented.
- Example 6 (Production of film-like resin layer) A film-like resin layer (b) was obtained in the same manner as in Example 4. (Production and evaluation of electronic devices) The film-like resin layer (b) formed on the substrate is laminated on the surface of the circuit board on which the solder 5 bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off. Alignment so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.) at 80 ° C. and 0.05 MPa for 7 seconds.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- the inside of the oven was pressurized with air at a pressure of 0.5 MPa (the laminate was pressurized at 0.5 MPa) and heated at 120 ° C. for 5 minutes (first pressure). Pressure curing step).
- the laminate was heated and compressed at 230 ° C. and 0.2 MPa for 15 seconds using a flat plate press (MSA-2 manufactured by System Development Co., Ltd.) to perform solder bonding (solder bonding step).
- the inside of the oven is pressurized with air at a pressure of 0.5 MPa (while the laminate is pressurized at 0.5 MPa), 180 ° C., Heated for 60 minutes (second pressure curing step) to produce an electronic device. Subsequently, evaluation similar to Example 1 was implemented.
- Example 7 (Production of film-like resin layer) A film-like resin layer (b) was obtained in the same manner as in Example 4. (Production and evaluation of electronic devices) The film-like resin layer (b) formed on the substrate is laminated on the surface of the circuit board on which the solder 5 bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off. Alignment so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.) at 80 ° C. and 0.05 MPa for 7 seconds.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- Heat compression was performed to obtain a laminate (positioning step).
- a flat plate press is installed in a commercially available press-type oven, the laminate is attached to the flat plate press, and the inside of the oven is pressurized to 0.5 MPa with air (the laminate is zero). Heating was started at 180 ° C. while pressurizing at 5 MPa. Then, after 5 minutes have passed since the start of heating at 180 ° C., the temperature of the press surface was set with a flat plate press machine installed in a pressurization type oven in a pressurized atmosphere of 180 ° C. and a pressure of 0.5 MPa. The temperature was set to 230 ° C., and heat compression was performed at 0.2 MPa for 15 seconds.
- Example 1 After that, heating is continued in a pressurized atmosphere at 180 ° C. and a pressurizing force of 0.5 MPa, and heating is performed for 60 minutes from the start of heating at 180 ° C. (solder bonding and pressure curing process) to produce an electronic device. did. Subsequently, evaluation similar to Example 1 was implemented. In Table 1, it is described that the solder bonding is performed at 230 ° C., 0.2 MPa, and 15 seconds, but the resin layer is hardened also during the solder bonding process.
- Example 8 (Production of liquid resin composition) 70 parts by weight of bisphenol F type epoxy resin EXA-830LVP (manufactured by Dainippon Ink and Chemicals) as an epoxy resin, 20 parts by weight of PR-53467 (manufactured by Sumitomo Bakelite Co., Ltd.) as a phenol novolak resin, and flux action 10 parts by weight of phenolphthalin (manufactured by Tokyo Chemical Industry Co., Ltd.) as a compound having an amount of 0.5 and 2 parts by weight of 2P4MZ (manufactured by Shikoku Kasei Co., Ltd.) as an imidazole compound are mixed with three rolls to form a liquid. A resin composition (c) was produced.
- EXA-830LVP manufactured by Dainippon Ink and Chemicals
- PR-53467 manufactured by Sumitomo Bakelite Co., Ltd.
- flux action 10 parts by weight of phenolphthalin manufactured by Tokyo Chemical Industry Co., Ltd.
- 2P4MZ
- the liquid resin composition (c) is applied to the surface of the circuit board on which the solder 5 bumps are formed.
- An electronic device was fabricated and evaluated in the same manner as in Example 2 except that the coating was applied to a thickness of 35 ⁇ m to form a resin layer.
- Example 9 (Production of resin varnish) 50 parts by weight of cresol novolac type epoxy resin EOCN-1020-70 (manufactured by Nippon Kayaku Co., Ltd.) as an epoxy resin, 25 parts by weight of PR-53467 (manufactured by Sumitomo Bakelite Co., Ltd.) as a phenol novolac resin, flux 25 parts by weight of phenolphthalin (manufactured by Tokyo Chemical Industry Co., Ltd.) as an active compound and 0.2 part by weight of 2P4MZ (manufactured by Shikoku Kasei Co., Ltd.) as an imidazole compound are dissolved in ethylene glycol monobutyl ether acetate.
- a varnish with a solid content of 80% was prepared, and the resulting varnish was mixed with three rolls to prepare a resin varnish (d) layer.
- the resin varnish (d) is 35 ⁇ m thick on the surface of the circuit board on which the solder 5 bumps are formed.
- An electronic device was prepared and evaluated in the same manner as in Example 2 except that the resin layer was formed by further drying at 100 ° C. for 10 minutes to evaporate the solvent and forming a resin layer.
- Example 10 (Production of film-like resin layer) A film-like resin layer (a) was obtained in the same manner as in Example 1. (Production and evaluation of electronic devices) The film-like resin layer (a) formed on the substrate is laminated on the surface of the circuit board on which the solder 5 bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off (resin layer arranging step). Alignment so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.) at 80 ° C. and 0.05 MPa for 7 seconds.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- Heat compression was performed to obtain a laminate (positioning step).
- the inside of the oven was pressurized with air at a pressure of 0.5 MPa (the laminate was pressurized at 0.5 MPa) and heated at 180 ° C. for 60 minutes (pressure curing). Process).
- heating was performed using a reflow apparatus (NRY325-5Z manufactured by Daiwa Seisakusho Co., Ltd.) to perform solder bonding (solder bonding step), and an electronic device was manufactured. That is, soldering was performed by heating without compression. At this time, the heating conditions were 150 to 180 ° C. for 90 seconds, and then 220 ° C. for 45 seconds. Subsequently, evaluation similar to Example 1 was implemented.
- Example 11 (Production of film-like resin layer) A film-like resin layer (a) was obtained in the same manner as in Example 1. (Production and evaluation of electronic devices) The film-like resin layer (a) formed on the substrate is laminated on the surface of the circuit board on which the solder bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off (resin layer arranging step). Next, alignment is performed so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, and at 80 ° C. and 0.05 MPa using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.).
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- Example 12 (Production of film-like resin layer) A film-like resin layer (a) was obtained in the same manner as in Example 1. (Production and evaluation of electronic devices) The film-like resin layer (a) formed on the substrate is laminated on the surface of the circuit board on which the solder bumps are formed using a roll laminator at a temperature of 120 ° C.
- the substrate was peeled off (resin layer arranging step).
- alignment is performed so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, and at 80 ° C. and 0.05 MPa using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.).
- heat compression was performed for 7 seconds to obtain a laminate (positioning step).
- the inside of the oven is pressurized with air at a pressure of 0.5 MPa (pressing the laminate at 0.5 MPa), and heated at 230 ° C. for 0.5 minutes, Then, while applying a pressure of 0.5 MPa (pressing the laminated body at 0.5 MPa), heating was performed at 180 ° C. for 60 minutes (solder bonding and resin pressure curing step) to produce an electronic device.
- Example 1 (Production of film-like resin layer) A film-like resin layer (a) was obtained in the same manner as in Example 1. (Production and evaluation of electronic devices) The film-like resin layer (a) formed on the substrate is laminated on the surface of the circuit board on which the solder bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off. Next, alignment is performed so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, and at 80 ° C. and 0.05 MPa using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.). For 7 seconds.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- Example 1 it was heated and compressed at 230 ° C. and 0.2 MPa for 5 seconds with a flat plate press (MSA-2 manufactured by System Development Co., Ltd.) to join the solder bumps on the circuit board and the Au bumps on the semiconductor chip (solder bonding). ).
- MSA-2 manufactured by System Development Co., Ltd.
- an electronic device was manufactured in a commercially available oven by heating at 180 ° C. for 60 minutes under atmospheric pressure (non-pressurization curing, no pressurization with a pressurized fluid, pressure: 0 MPa). Subsequently, evaluation similar to Example 1 was implemented.
- Comparative Example 2 (Production and evaluation of electronic devices) An electronic device was fabricated and evaluated in the same manner as in Comparative Example 1 except that the heat compression time in solder bonding was changed from 5 seconds to 15 seconds.
- Comparative Example 3 (Production and evaluation of electronic devices) An electronic device was fabricated and evaluated in the same manner as in Comparative Example 1 except that the heat compression time in solder bonding was changed from 5 seconds to 115 seconds.
- Example 4 (Production of film-like resin layer) A film-like resin layer (b) was obtained in the same manner as in Example 4. (Production and evaluation of electronic devices) The film-like resin layer (b) formed on the substrate is laminated on the surface of the circuit board on which the solder bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off. Alignment so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.) at 80 ° C. and 0.05 MPa for 7 seconds. Heat compression was performed.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- Example 1 In a commercially available oven, heating was performed at 180 ° C. for 60 minutes under atmospheric pressure (non-pressurization curing, no pressurization with a pressurized fluid, pressurization pressure: 0 MPa). Next, it was pressed and compressed at 230 ° C. and 0.2 MPa for 15 seconds using a flat plate press (MSA-2, manufactured by System Development Co., Ltd.), and soldered to produce an electronic device. Subsequently, evaluation similar to Example 1 was implemented.
- MSA-2 manufactured by System Development Co., Ltd.
- Example 5 (Production of film-like resin layer) A film-like resin layer (a) was obtained in the same manner as in Example 1. (Production and evaluation of electronic devices) The film-like resin layer (a) formed on the substrate is laminated on the surface of the circuit board on which the solder bumps are formed using a roll laminator at a temperature of 120 ° C. and a speed of 50 cm / min. The substrate was peeled off. Alignment so that the first terminal of the circuit board and the second terminal of the semiconductor chip face each other, using a flip chip bonder (DP-200 manufactured by Kasuya Kogyo Co., Ltd.) at 80 ° C. and 0.05 MPa for 7 seconds. Heat compression was performed.
- DP-200 manufactured by Kasuya Kogyo Co., Ltd.
- heating was performed at 180 ° C. for 60 minutes under atmospheric pressure (non-pressurization curing, no pressurization with a pressurized fluid, pressurization pressure: 0 MPa).
- heating was performed using a reflow apparatus (NRY325-5Z manufactured by Yamato Seisakusho Co., Ltd.) to perform solder bonding, and an electronic device was manufactured. That is, soldering was performed by heating without compression.
- the heating conditions were 150 to 180 ° C. for 90 seconds, and then 220 ° C. for 45 seconds. Subsequently, evaluation similar to Example 1 was implemented.
- Example 11 is the same as Example 11 except that the solder bonding and resin curing steps were performed without applying pressure to the laminate.
- Example 12 is the same as Example 12 except that the solder bonding and resin curing steps were performed without pressing the laminate.
- Heating condition 1 150 to 180 ° C. for 90 seconds, then 220 ° C. for 45 seconds
- Heating condition 1 150 to 180 ° C. for 90 seconds, then 220 ° C. for 45 seconds
- Example 4 the microvoids confirmed in Example 4 were smaller than those confirmed in Comparative Examples 1 to 7, and the size was not a problem in practical use. In addition, the number of microvoids confirmed in Example 4 is smaller than those in Comparative Examples 1 to 7, which is not a problem in practical use.
- the pressure applied to the resin layer when the resin layer was cured was set to 0.5 MPa, but similar effects were obtained even when the pressure was set to 10 MPa.
- the resin layer having a flux action contains an epoxy resin, but when the resin layer contains another thermosetting resin (such as an oxetane resin) instead of the epoxy resin. In addition, it was confirmed that the generation of voids can be suppressed as in Examples 1-12.
- the minimum melt viscosity at 100 ° C. to 200 ° C. of the resin layers used in Examples 1 to 12 was 2 Pa ⁇ s.
- the minimum melt viscosity was measured using a rheometer, which is a viscoelasticity measuring device, by applying shear shear at a frequency of 1 Hz to a film-like sample at a heating rate of 10 ° C./min.
- the resin layer was a liquid resin composition, the solvent was dried to form a film, and measurement was performed.
- Example 13 (Production of film-like resin layer) 45 parts by weight of cresol novolac type epoxy resin EOCN-102070 (manufactured by Nippon Kayaku Co., Ltd.) as an epoxy resin, 15 parts by weight of PR-53467 (manufactured by Sumitomo Bakelite Co., Ltd.) as a phenol novolac resin, and phenoxy resin YP-50 (manufactured by Tohto Kasei Co., Ltd.), 15 parts by weight of phenolphthaline (manufactured by Tokyo Kasei Co., Ltd.) as a compound having a flux action, and KBM-303 as a silane coupling agent 1.0 part by weight (manufactured by Shin-Etsu Silicone Co., Ltd.) and 0.05 part by weight of 2P4MZ (manufactured by Shikoku Kasei Co., Ltd.) as an imidazole compound are dissolved in acetone, and further, a filler (man
- the varnish-like resin composition obtained above is applied to a polyester sheet (base material) using a comma coater, dried at a temperature of 100 ° C. for 3 minutes at which the acetone volatilizes, and formed on the base material.
- a film-like resin layer having a thickness of 35 ⁇ m was obtained.
- An electronic device was produced in the same manner as in Example 1 using the film-like resin layer formed on the substrate.
- Example 1 Evaluation of electronic equipment The electronic device obtained in Example 1 was evaluated in the same manner as in Example 1.
- Example 14 (Production of film-like resin layer)
- Example 13 is the same as Example 13 except that a filler (manufactured by Admatechs, SE6050, average particle size 2 ⁇ m) is added to the resin layer of Example 13 to add 30 parts by weight of the varnish-like resin composition. A similar resin layer was produced. Thereafter, an electronic device was produced in the same manner as in Example 13, and the same evaluation as in Example 1 was performed.
- a filler manufactured by Admatechs, SE6050, average particle size 2 ⁇ m
- Example 15 (Production of film-like resin layer)
- Example 13 is the same as Example 13 except that a filler (manufactured by Admatechs, SE6050, average particle size 2 ⁇ m) was added to the resin layer of Example 13 to add 60 parts by weight of the varnish-like resin composition. A similar resin layer was produced. Thereafter, an electronic device was produced in the same manner as in Example 13, and the same evaluation as in Example 1 was performed.
- a filler manufactured by Admatechs, SE6050, average particle size 2 ⁇ m
- Table 6 shows the compositions of the resin layers used in Examples 13 to 15.
- the minimum melt viscosity at 100 ° C. to 200 ° C. of the resin layer used in Example 13 was 5 Pa ⁇ s.
- the minimum melt viscosity at 100 ° C. to 200 ° C. of the resin layer used in Example 14 was 100 Pa ⁇ s.
- the minimum melt viscosity at 100 ° C. to 200 ° C. of the resin layer used in Example 15 was 3300 Pa ⁇ s.
- the minimum melt viscosity was measured using a rheometer, which is a viscoelasticity measuring device, by applying shear shear at a frequency of 1 Hz to a film-like sample at a heating rate of 10 ° C./min. In Examples 13 to 15, none of the microvoids and poor conduction occurred. It was also confirmed that the use of a resin layer having a higher minimum melt viscosity than Example 1 as in Examples 13 to 15 can more reliably suppress the generation of microvoids.
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Abstract
Description
まず、半田を用いて接合する前に、支持体と被着体との間に、フラックスを含有する樹脂層を配置する。次いで、半田の融点以上の温度で加熱して、半田接合を行う。さらに、樹脂層の硬化を行うことにより、半田接合工程と、支持体と被着体との隙間を埋める。
該第一の端子と該第二の端子との間に、フラックス作用を有する樹脂層を配置して、前記第一電子部品、前記第二電子部品、前記樹脂層とを含む積層体を得る工程と、
該第一の端子と該第二の端子とを、半田接合させる半田接合工程と、
加圧流体により前記積層体を加圧しながら、該樹脂層を硬化させる加圧硬化工程と、
を行う電子装置の製造方法が提供される。
ここで、本発明では、半田接合工程を実施した後、加圧硬化工程を実施してもよく、また、半田接合工程の前に加圧硬化工程を実施してもよい。さらには、半田接合工程と、加圧硬化工程とを同時に実施してもよい。
(第一実施形態)
本発明の電子装置の製造方法の概要について説明する。
本実施形態の電子装置の製造方法は、支持体1(第一電子部品)の第一の端子3と、被着体(第二電子部品)2の第二の端子4とを、半田5を用いて接合して、該支持体1と該被着体2とを電気的に接続する電子部品の製造方法であって、
該第一の端子3と該第二の端子4との間に、フラックス作用を有する樹脂層6を配置して、前記支持体1、前記被着体2、前記樹脂層6とを含む積層体を得る工程と、
該第一の端子3と該第二の端子4とを、半田接合させる半田接合工程と、
加圧流体により前記積層体を加圧しながら、該樹脂層6を硬化させる加圧硬化工程と、
を含む。
本実施形態では、半田接合工程を実施した後、加圧硬化工程を実施する。
図1中、支持体1は、第一の端子3と、半田5を有しており、第一の端子3上には、半田5がメッキされている。また、被着体2は、第二の端子4を有している。そして、後の工程で、第一の端子3と、第二の端子4とが、半田5を用いて接合されることにより、支持体1と被着体2とが電気的に接続される。
なお、前記積層体は、加熱オーブン8内に配置されたヒータにより加熱されることとなる。
一方で、フラックス作用を有する樹脂層6の100~200℃における最低溶融粘度が10000Pa・s以下であることで、樹脂層6を構成する樹脂組成物が流動し、樹脂層6中で発生したボイドを埋めることができる。これにより、樹脂層6の硬化物中でのボイドの発生を抑制できる。
最低溶融粘度は、例えば、粘弾性測定装置であるレオメーターを用いて、フィルム状態のサンプルに10℃/分の昇温速度で、周波数1Hzのずり剪断を与えて測定される。
HOOC-(CH2)n-COOH (1)
(式(1)中、nは、0以上20以下の整数を表す。)
なかでも、接続信頼性および樹脂層6を膜状に成形する際の膜成形性の観点から、フェノールフタリンが好ましい。
1.フラックス作用を有する化合物を含有する樹脂組成物をフィルム状に成形した樹脂フィルムを用意し、この樹脂フィルムを、支持体1又は被着体2にラミネートする方法、
2.フラックス作用を有する化合物を含有する液状の樹脂組成物を用意し、この液状の樹脂組成物を、支持体1又は被着体2の表面に塗布する方法、
3.フラックス作用を有する化合物を含有する樹脂組成物が溶剤に溶解又は分散されている樹脂ワニスを用意し、この樹脂ワニスを、支持体1又は被着体2の表面に塗布し、次いで、樹脂ワニス中の溶剤を揮発させる方法、
が挙げられる。なお、方法2に係る液状の樹脂組成物は、溶剤を含有しない。
(1-I)第二の端子4が半田5に接触しない状態で、支持体1、被着体2及び樹脂層6を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱する。そして、第一の端子3と第二の端子4の距離を短くすることにより、半田5を用いて第一の端子3と第二の端子4とを半田接合する工程
又は
(1-II)あらかじめ、第一の端子3と第二の端子4とを半田5を介して接触させて、支持体1、被着体2及び樹脂層6を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱することにより、半田5を用いて第一の端子3と第二の端子4とを半田接合する工程
である。
(1-II)では、第一の端子3と第二の端子4とが接触した状態から、第一の端子3と第二の端子4と間の距離がさらに短くなるようにプレス板等で支持体1、被着体2及び樹脂層6を加圧してもよい。
(a)第一の端子3及び第二の端子4のそれぞれ上に半田5が設けられている場合、半田5が溶融することにより、半田接合されるので、半田5及び端子3,4を構成する金属の種類に関わらず、半田接合を行うためには、支持体1、被着体2及び樹脂層6を半田の融点以上の温度に加熱しなければならない。そのため、(a)の場合、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度とは、半田の融点以上の温度を指す。
(b)第一の端子3及び第二の端子4のうち、いずれか一方上にのみ半田5が設けられており、他方上には半田5が設けられていない場合であって、且つ、半田の融点以上の温度でないと、半田5が設けられていない方の端子を構成する金属が、半田と合金を形成しない場合、半田接合するためには、支持体1、被着体2及び樹脂層6を半田5の融点以上の温度に加熱しなければならない。そのため、(b)の場合、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度とは、半田5の融点以上の温度を指す。(b)の場合の具体例としては、半田として錫96.5/銀3.5半田(融点221℃)がメッキされている銅製の第一の端子と、半田がメッキされていない銅製の第二の端子とを接合する場合、錫96.5/銀3.5半田と銅は、錫96.5/銀3.5半田の融点以上の温度でないと、錫96.5/銀3.5半田と銅の合金を形成しないので、錫96.5/銀3.5半田の融点以上の温度が、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度である。
(c)第一の端子3及び第二の端子4のうちいずれか一方上にのみ半田5が設けられており、他方上には半田5が設けられていない場合であって、半田5の融点より低い温度で、半田5が設けられていない方の端子を構成する金属が、半田に拡散して半田と合金を形成する場合、支持体1、被着体2及び樹脂層6の加熱温度が、半田5の融点より低い温度であっても、半田接合が可能になる。そのため、(c)の場合、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度とは、半田5が設けられていない側の端子を構成する金属が、半田に拡散して、半田と合金を形成する温度以上の温度を指す。(c)の場合の具体例としては、半田として錫96.5/銀3.5半田(融点221℃)がメッキされている銅製の第一の端子と、半田がメッキされていない金製の第二の端子とを接合する場合、金は、錫96.5/銀3.5の融点より低い温度でも、錫96.5/銀3.5半田中に拡散して、金と錫96.5/銀3.5半田の合金を形成するので、金が錫96.5/銀3.5半田に拡散して金と錫96.5/銀3.5半田の合金の形成が起こる温度以上の温度が、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度である。そして、半田として錫96.5/銀3.5半田がメッキされている銅製の第一の端子3と、半田がメッキされていない金製の第二の端子4とを接合する場合、25℃程度以上であれば、金の半田5への拡散が起こり、半田接合が可能になるが、接合時間を考慮すると、半田接合の際の支持体1、被着体2及び樹脂層6の加熱温度は、110~250℃が好ましい。
ここで、支持体1、被着体2及び樹脂層6を含む積層体の雰囲気の圧力が、大気圧より加圧力分だけ高くなるので、支持体1、被着体2及び樹脂層6を含む積層体は、加圧流体により、少なくとも、積層体の上面側、両側面側から均等に直接、加圧されることとなる。
一方、支持体1、被着体2及び樹脂層6を含む積層体を加圧する際の加圧力を10MPa以下とすることで、積層体を加圧する装置、たとえば図5に示す加熱オーブンの大型化、複雑化を防止できる。
すなわち、加圧力10MPaとは、大気圧よりも、積層体にかかる圧力が10MPa大きいことを示す。
(i)加熱処理を行っていない樹脂層6(つまり、樹脂層配置工程で、第一の端子3と第二の端子4に配置される樹脂層)を、示差走査熱量計(DSC)を用いて、測定温度範囲25~300℃、昇温速度:10℃/分の測定条件で加熱し、その時の発熱量A1を測定する。(ii)半田接合工程及び加圧硬化工程と同じ熱履歴(加熱温度、加熱時間)を加えた樹脂層6を用意し、それを同様の測定方法にて加熱し、その時の発熱量B1を測定する。
(iii)硬化率C1(%)を、下記式(2)により算出する。
C1(%)={(A1-B1)/A1}×100 (2)
次に、本発明の第二実施形態の電子部品の製造方法について説明する。
本発明の第二実施形態の電子装置の製造方法は、支持体1の第一の端子3と、被着体2の第二の端子4とを、半田5を用いて接合して、該支持体1と該被着体2とを電気的に接続する電子装置の製造方法であって、
接合される該第一の端子3と該第二の端子4との間に、フラックス作用を有する樹脂層6を配置する樹脂層配置工程と、
接合される該第一の端子3と該第二の端子4との位置合わせを行う位置合わせ工程と、
加圧流体により加圧しながら、該樹脂層6を硬化させる加圧硬化工程と、
該第一の端子3と該第二の端子4とを、半田接合させる半田接合工程と、
を順に行う電子装置の製造方法である。
(i)加熱処理を行っていない樹脂層6(つまり、樹脂層配置工程で、第一の端子3と第二の端子4との間に配置される樹脂層6)を、示差走査熱量計(DSC)を用いて、測定温度範囲25~300℃、昇温速度:10℃/分の測定条件で加熱し、その時の発熱量A2を測定する。(ii)加圧硬化工程と同じ熱履歴(加熱温度、加熱時間)を加えた樹脂層6を用意し、それを同様の測定方法にて加熱し、その時の発熱量B2を測定する。(iii)硬化率C2(%)を、下記式(3)により算出する。
C2(%)={(A2-B2)/A2}×100 (3)
一方、加圧流体で支持体1、被着体2及び樹脂層6を含む積層体を加圧する際の加圧力を10MPa以下とすることで、積層体を加圧する装置、たとえば図5に示す加熱オーブンの大型化、複雑化を防止できる。
(2-I)第二の端子4が半田5に接触しない状態で支持体1、被着体2及び加圧硬化工程で硬化された樹脂層6の硬化物を含む積層体を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱しつつ、第一の端子3と第二の端子4の距離を短くすることにより、半田5を用いて第一の端子3と第二の端子4とを半田接合する工程である。
又は
(2-II)第一の端子3と第二の端子4とを半田5を介して接触させて、支持体1、被着体2及び加圧硬化工程で硬化された樹脂層6の硬化物を含む積層体を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱することにより、半田5を用いて第一の端子3と第二の端子4とを半田接合する工程である。
(2-II)では、第一の端子3と第二の端子4とが接触した状態から、第一の端子3と第二の端子4と間の距離がさらに短くなるようにプレス板等で支持体1、被着体2及び樹脂層6を加圧してもよい。
なお、以下では、半田接合工程において、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度、及び半田5及び端子を構成する金属の組み合わせ(a)、(b)及び(c)は、第一実施形態の半田接合工程の説明と同様である。
(i)加熱処理を行っていない樹脂層6(つまり、樹脂層配置工程で、第一の端子3と第二の端子4に配置される樹脂層6)を、示差走査熱量計(DSC)を用いて、測定温度範囲25~300℃、昇温速度:10℃/分の測定条件で加熱し、その時の発熱量A3を測定する。
(ii)加圧硬化工程及び半田接合工程と同じ熱履歴(加熱温度、加熱時間)を加えた樹脂層6を用意し、それを同様の測定方法にて加熱し、その時の発熱量B3を測定する。(iii)硬化率C3(%)を、下記式(4)により算出する。
C3(%)={(A3-B3)/A3}×100 (4)
本発明の第三実施形態の電子装置の製造方法は、支持体1の第一の端子3と、被着体2の第二の端子4とを、半田5を用いて接合して、該支持体1と該被着体2とを電気的に接続する電子装置の製造方法であって、
接合される該第一の端子3と該第二の端子4との間に、フラックス作用を有する樹脂層6を配置する樹脂層配置工程と、
接合される該第一の端子3と該第二の端子4との位置合わせを行う位置合わせ工程と、
加圧流体により加圧しながら、該樹脂層6を硬化させる第一加圧硬化工程と、 該第一の端子3と該第二の端子4とを、半田接合させる半田接合工程と、
加圧流体により加圧しながら、該第一加圧硬化工程で硬化させた該樹脂層6を更に硬化させる第二加圧硬化工程と、
を順に行う電子装置の製造方法である。
このようにすることで、樹脂層6の硬化物中に発生するボイドを確実に抑制できる。
一方、加圧流体で支持体1、被着体2及び樹脂層6を含む積層体を加圧する際の加圧力を10MPa以下とすることで、積層体を加圧する装置、たとえば図5に示す加熱オーブンの大型化、複雑化を防止できる。
(3-I)第二の端子4が半田5に接触しない状態で、支持体1、被着体2及び第一加圧硬化工程で硬化された樹脂層6の硬化物を含む積層体を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱しつつ、第一の端子3と第二の端子4の距離を短くすることにより、半田5を用いて第一の端子3と第二の端子4とを半田接合する工程である。
又は(3-II)第一の端子3と第二の端子4とを半田5を介して接触させて、支持体1、被着体2及び第一加圧硬化工程で硬化された樹脂層6の硬化物を含む積層体を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱することにより、半田5を用いて第一の端子3と第二の端子4とを半田接合する工程である。
(3-II)では、第一の端子3と第二の端子4とが接触した状態から、第一の端子3と第二の端子4と間の距離がさらに短くなるようにプレス板等で支持体1、被着体2及び樹脂層6を加圧してもよい。
なお、半田接合工程において、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度、及び半田5及び端子を構成する金属の組み合わせ(a)、(b)及び(c)は、第一実施形態の半田接合工程の説明と同様である。
一方、加圧流体で支持体1、被着体2及び樹脂層6を含む積層体を加圧する際の加圧力を10MPa以下とすることで、積層体を加圧する装置、たとえば図5に示す加熱オーブンの大型化、複雑化を防止できる。
(i)加熱処理を行っていない樹脂層6(つまり、樹脂層配置工程で、第一の端子3と第二の端子4に配置される樹脂層6)を、示差走査熱量計(DSC)を用いて、測定温度範囲25~300℃、昇温速度:10℃/分の測定条件で加熱し、その時の発熱量A4を測定する。(ii)第一加圧硬化工程、半田接合工程及び第二加圧硬化工程と同じ熱履歴(加熱温度、加熱時間)を加えた樹脂層6を用意し、それを同様の測定方法にて加熱し、その時の発熱量B4を測定する。(iii)硬化率C4(%)を、下記式(5)により算出する。
C4(%)={(A4-B4)/A4}×100 (5)
本発明の第四実施形態の電子装置の製造方法は、支持体1の第一の端子3と、被着体2の第二の端子4とを、半田5を用いて接合して、該支持体1と該被着体2とを電気的に接続する電子装置の製造方法であって、
接合される該第一の端子3と該第二の端子4との間に、フラックス作用を有する樹脂層6を配置する樹脂層配置工程と、
接合される該第一の端子3と該第二の端子4との位置合わせを行う位置合わせ工程と、
加圧流体により、支持体1、被着体2,樹脂層6を含む積層体を加圧しながら、該第一の端子3と該第二の端子4との半田接合と、該樹脂層6の硬化を同時に行う半田接合兼加圧硬化工程と、
を順に行う電子装置の製造方法である。
(4-III)第二の端子4が半田5に接触しない状態で、加圧流体により支持体1、被着体2及び樹脂層6を含む積層体を加圧しながら、支持体1、被着体2及び樹脂層6を、樹脂層6の硬化温度以上の温度で加熱して、樹脂層6の硬化を行う。この硬化過程の途中で、樹脂層6の硬化のための加圧雰囲気中で、支持体1、被着体2及び樹脂層6を、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で前記積層体を加熱しながら圧縮する。圧縮により、第一の端子3と第二の端子4の距離を短くし、第一の端子3と第二の端子4との半田接合と、樹脂層6の加圧硬化とを同時に行う工程、
又は
(4-IV)第一の端子3と第二の端子4とを半田5を介して接触させて、加圧流体により加圧しながら、支持体1、被着体2及び樹脂層6を、樹脂層6の加圧硬化及び第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度で加熱する。これにより、第一の端子3と第二の端子4との半田接合と、樹脂層6の加圧硬化とを同時に行う工程である。
(4-IV)では、第一の端子3と第二の端子4とが接触した状態から、第一の端子3と第二の端子4と間の距離がさらに短くなるように加圧雰囲気下で、プレス板等を使用して支持体1、被着体2及び樹脂層6を加圧してもよい。
なお、半田接合兼加圧硬化工程において、第一の端子3と第二の端子4との半田接合が可能となる温度以上の温度、及び半田5及び端子を構成する金属の組み合わせ(a)、(b)及び(c)は、第一実施形態の半田接合工程の説明と同様である。
一方で、半田接合兼加圧硬化工程において、加圧流体で支持体1、被着体2及び樹脂層6を加圧する際の加圧力を10MPa以下とすることで、積層体を加圧する装置、たとえば図5に示す加熱オーブンの大型化、複雑化を防止できる。
位置合わせをした後、第二の端子4を、樹脂層6にめり込ませる場合は、支持体1、被着体2及び樹脂層6を圧縮しながら、第二の端子4を、樹脂層6にめり込ませることもできる。圧縮する圧力は、特に限定されるものではないが、0.001~10MPaが好ましく、0.01~1MPaが特に好ましい。圧縮圧力を上記範囲とすることで、第一の端子3上の半田5と第二の端子4の接触面積を確保することができるため、後述する、半田接合兼樹脂加圧硬化工程で、半田接合を確実に行うことができる。
さらに、前述の加熱および圧縮を併用しても良い。加熱と圧縮を併用することにより、第二の端子4を樹脂層6にめり込ませることが容易となり、確実に第一の端子3上の半田5と第二の端子4を接触することができる。
なお、半田接合兼加圧硬化工程では、半田5及び端子を構成する金属の組み合わせが上記(c)の場合に、(4-III)加圧流体により加圧しながら、支持体1、被着体2及び樹脂層6を、樹脂層6の硬化温度以上の温度で加熱して、樹脂層6の硬化を行いつつ、その硬化過程の途中で、樹脂層6の硬化のための加圧雰囲気中で、支持体1、被着体2及び樹脂層6を、半田5の融点以上の温度で加熱しながら圧縮して、第一の端子3と第二の端子4の距離を短くすることにより、半田接合及び樹脂の加圧硬化を行うこともできる。そして、半田5と端子を構成する金属の組み合わせが上記(c)の場合、半田接合兼加圧硬化工程で、(4-IV)の方法で半田接合を行うことにより、支持体1のひずみが生じ難くなるので、硬化物中に空隙(ボイド)が発生し難くなり、また、(4-III)の方法で半田接合を行うことにより、半田接合をより確実に行うことができる。そのため、半田5と端子を構成する金属の組み合わせが上記(c)の場合、半田接合兼加圧硬化工程では、適宜、(III)又は(IV)の方法を選択することができる。
例えば、以下の(d)~(f)ような例示が挙げられる。
(d)積層体を加圧流体により加圧しながら、半田5と第二の端子4が半田接合可能な温度まで昇温し、所定時間、たとえば、5分~180分間その温度を保持することにより、半田5と第二の端子4を半田接合させるとともに樹脂層6の硬化と空隙の排除を行う。
(e)積層体を加圧流体により加圧しながら、半田5と第二の端子4が半田接合可能な温度まで昇温し、所定時間、たとえば3秒~10分間その温度以上を保持することにより、半田5と第二の端子4を半田接合させ、次に、積層体を加圧流体により加圧しながら、樹脂層6が硬化する温度まで降温し、所定時間、たとえば5分~180分間その温度を保持することにより、樹脂層6の硬化と空隙の排除を行う。
(f)積層体を加圧流体により加圧しながら、樹脂層6が硬化する温度まで昇温し、所定時間、たとえば、5分~180分間その温度を保持することにより、樹脂層6の硬化と空隙の排除を行い、次に、積層体を加圧流体により加圧しながら、半田5と第二の端子4が、半田接合可能な温度まで昇温し、所定時間、たとえば、3秒~10分間その温度以上を保持することにより、半田5と第二の端子4を半田接合させる。
前記(e)および(f)においては、半田5と第二の端子4の半田接合と樹脂層6の硬化および空隙の排除が、各々行われるように記載したが、半田5と第二の端子4の半田接合と樹脂層6の硬化および空隙の排除は並行して行われていても良い。
半田接合兼加圧硬化工程を行い得られる樹脂層6の硬化物の硬化率は、好ましくは80%以上、特に好ましくは90~100%である。なお、本発明の第四実施形態の電子装置の製造方法において、半田接合兼加圧硬化工程を行い得られる樹脂層6の硬化物の硬化率は、以下の手順により求められる。
(i)加熱処理を行っていない樹脂層6(つまり、樹脂層配置工程で、第一の端子3と第二の端子4に配置される樹脂層6)を、示差走査熱量計(DSC)を用いて、測定温度範囲25~300℃、昇温速度:10℃/分の測定条件で加熱し、その時の発熱量A5を測定する。(ii)半田接合兼加圧硬化工程と同じ熱履歴(加熱温度、加熱時間)を加えた樹脂層6を用意し、それを同様の測定方法にて加熱し、その時の発熱量B5を測定する。(iii)硬化率C5(%)を、下記式(6)により算出する。
C5(%)={(A5-B5)/A5}×100 (6)
さらには、ボイドを起点として、樹脂層6中にクラックが発生してしまうことも防止できる。
更に、加圧硬化工程では、加圧流体により、支持体1、被着体2及び樹脂層6を含む積層体に、全方向から均等に圧力が加えられるため、樹脂層6の溶融物が、支持体1と被着体2との隙間から周囲へブリードするのを防ぐことができる。
また、第一実施形態では、樹脂層6を硬化させる前段で第一の端子3と、第二の端子4とを半田接合しているため、第二端子4への半田5の濡れ広がりが硬化した樹脂層6により抑制されてしまうことが防止される。
第二実施形態では、第一の端子3と第二の端子4との位置あわせを行った後、樹脂層6を硬化させ、第一の端子3と、第二の端子4とを半田接合しているため、第一の端子3と第二の端子4と位置ずれしてしまうことを確実に防止できる。
また、第二実施形態のように、半田接合前に樹脂層6を硬化させることで半田接合を行う際に、樹脂層6内で発泡がおき、ボイドが発生することを防止できる。
第三実施形態では、樹脂層6を加圧しながらある程度硬化させた後、半田接合を行い、再度樹脂層6を加圧しながら硬化させているので、第二端子4への半田5の濡れ広がりを確保しつつ、ボイドの発生を抑制できる。
さらに、第四実施形態のように、樹脂層6を加圧加熱しながら、第一の端子3と第二の端子4とを接合する際にも加圧することでも、第二端子4への半田5の濡れ広がりを確保しつつ、ボイドの発生を抑制できる。
第四実施形態のように樹脂層6の硬化と、第一の端子3と第二の端子4との接合を同時に実施することで製造時間を短縮することができる。
また、第四実施形態では、第一の端子3と第二の端子4とを接合する際に、積層体を加圧している。加圧することで樹脂層6の密度を高めて、体積を低減させることにより、第一の端子3および第二の端子4とが圧着する方向に力を作用させることが可能となる。さらに、第一の端子3および第二の端子4とを接合する際に、流体により積層体を加圧することで、樹脂層6の発泡による樹脂流動が抑制でき、第一の端子3および第二の端子4間のずれを低減させることができる。
なお、上述した第一実施形態~第四実施形態では、樹脂層6の硬化の際に流体により積層体4を加圧している。積層体をプレス板等で挟んで加圧する場合には、樹脂層6でのボイドの発生は抑制できないが、流体で積層体を加圧することで、樹脂層6の上下左右から圧力がかかり、ボイドの発生が抑制されるのである。
次に、本発明の第一~第四実施形態の電子装置の製造方法で用いるフラックス作用を有する樹脂層6を形成する樹脂組成物について説明する。なお、各成分は、一種類の化合物としてもよいし、複数の化合物を組み合わせて用いてもよい。
、キシレン、トルエン等の芳香族炭化水素類、メチルアルコール、エチルアルコール、イソプロピルアルコール、n-ブチルアルコール等のアルコール類、メチルセロソルブ、エチルセロソルブ、ブチルセロソルブ、メチルセロソルブアセテート、エチルセロソルブアセテート、BCSA(ブチロセルソルブアセテート)等のセロソルブ系、NMP(N-メチル-2-ピロリドン)、THF(テトラヒドロフラン)、DMF(ジメチルホルムアミド)、DBE(ニ塩基酸エステル)、EEP(3-エトキシプロピオン酸エチル)、DMC(ジメチルカーボネート)等が挙げられる。また、樹脂ワニス中、溶剤の含有量は、溶媒に混合した固形成分の含有量が10~60重量%となる量が好ましい。
飽和吸水率(%)={(飽和した時点の重量-絶乾時点の重量)/絶乾時点の重量}×100 (7)
、シクロヘキサノン、DAA(ジアセトンアルコール)等のケトン類、ベンゼン、キシレン、トルエン等の芳香族炭化水素類、メチルアルコール、エチルアルコール、イソプロピルアルコール、n-ブチルアルコール等のアルコール類、メチルセロソルブ、エチルセロソルブ、ブチルセロソルブ、メチルセロソルブアセテート、エチルセロソルブアセテート、BCSA(ブチロセルソルブアセテート)等のセロソルブ系、NMP(N-メチル-2-ピロリドン)、THF(テトラヒドロフラン)、DMF(ジメチルホルムアミド)、DBE(ニ塩基酸エステル)、EEP(3-エトキシプロピオン酸エチル)、DMC(ジメチルカーボネート)等が挙げられる。
[1] 支持体の第一の端子と、被着体の第二の端子とを、半田を用いて接合して、該支持体と該被着体とを電気的に接続する電子部品の製造方法であって、
接合される該第一の端子と該第二の端子との間に、フラックス作用を有する樹脂層を配置する樹脂層配置工程と、
接合される該第一の端子と該第二の端子との位置合わせを行う位置合わせ工程と、
該第一の端子と該第二の端子とを、半田接合させる半田接合工程と、
加圧流体により加圧しながら、該樹脂層を硬化させる加圧硬化工程と、
を順に行うことを特徴とする電子部品の製造方法。
[2] 支持体の第一の端子と、被着体の第二の端子とを、半田を用いて接合して、該支持体と該被着体とを電気的に接続する電子部品の製造方法であって、
接合される該第一の端子と該第二の端子との間に、フラックス作用を有する樹脂層を配置する樹脂層配置工程と、
接合される該第一の端子と該第二の端子との位置合わせを行う位置合わせ工程と、
加圧流体により加圧しながら、該樹脂層を硬化させる加圧硬化工程と、
該第一の端子と該第二の端子とを、半田接合させる半田接合工程と、
を順に行うことを特徴とする電子部品の製造方法。
[3] 支持体の第一の端子と、被着体の第二の端子とを、半田を用いて接合して、該支持体と該被着体とを電気的に接続する電子部品の製造方法であって、
接合される該第一の端子と該第二の端子との間に、フラックス作用を有する樹脂層を配置する樹脂層配置工程と、
接合される該第一の端子と該第二の端子との位置合わせを行う位置合わせ工程と、
加圧流体により加圧しながら、該樹脂層を硬化させる第一加圧硬化工程と、
該第一の端子と該第二の端子とを、半田接合させる半田接合工程と、
加圧流体により加圧しながら、該第一加圧硬化工程で硬化させた該樹脂層を更に硬化させる第二加圧硬化工程と、
を順に行うことを特徴とする電子部品の製造方法。
[4] 支持体の第一の端子と、被着体の第二の端子とを、半田を用いて接合して、該支持体と該被着体とを電気的に接続する電子部品の製造方法であって、
接合される該第一の端子と該第二の端子との間に、フラックス作用を有する樹脂層を配置する樹脂層配置工程と、
接合される該第一の端子と該第二の端子との位置合わせを行う位置合わせ工程と、
加圧流体により加圧しながら、該第一の端子と該第二の端子との半田接合と、該樹脂層の硬化を同時に行う半田接合兼加圧硬化工程と、
を順に行うことを特徴とする電子部品の製造方法。
[5] 前記加圧流体がガスであることを特徴とする[1]~[4]いずれか1項に記載の電子部品の製造方法。
[6] 前記加圧流体が空気であることを特徴とする[1]~[5]いずれか1項に記載の電子部品の製造方法。
[7] 処理対象物を圧力容器内に設置し、該圧力容器内を前記加圧流体により加圧しながら、該処理対象物を加熱することにより、前記加圧硬化工程、前記第一加圧硬化工程、前記第二加圧硬化工程又は前記半田接合兼加圧硬化工程を行うことを特徴とする[1]~[4]いずれか1項に記載の電子部品の製造方法。
[8] 前記加圧硬化工程、前記第一加圧硬化工程、前記第二加圧硬化工程又は前記半田接合兼加圧硬化工程において、前記加圧流体の加圧力が、0.1~10MPaであることを特徴とする[1]~[7]いずれか1項に記載の電子部品の製造方法。
[9] 前記樹脂層配置工程において配置される前記樹脂層の100~200℃における最低溶融粘度が1~1000Pa・sであることを特徴とする[1]~[8]いずれか1項に記載の電子部品の製造方法。
[10] 前記樹脂層が、熱硬化性樹脂を含むことを特徴とする[1]~[9]いずれか1項に記載の電子部品の製造方法。
[11] 前記樹脂層が、少なくとも1つ以上のフェノール性水酸基を有する樹脂(A)と、その硬化剤として作用する樹脂(B)と、を含むことを特徴とする請求項[1]~[10]いずれか1項に記載の電子部品の製造方法。
[12][1]~[11]のいずれか1項に記載の製造方法により製造されることを特徴とする電子部品。
支持体としては、回路パターンが形成された回路基板(コア材として、住友ベークライト(株)社製、品番ELC-4785GS、熱膨張係数(Tg以下)XY方向:11ppm、Z方向:16ppm)を用い、回路基板には第一の端子上に半田5バンプ(Sn96.5Ag3.5)が形成されたものを使用した。
被着体としては、被着体の第二の端子にAuバンプを有する半導体チップ(サイズ縦15×横15×厚さ0.725mm)を使用した。
(フィルム状樹脂層の作製)
エポキシ樹脂としてクレゾールノボラック型エポキシ樹脂EOCN-102070(日本化薬(株)社製)45重量部と、フェノールノボラック樹脂としてPR-53467(住友ベークライト(株)社製)10重量部と、アクリルゴムとしてSG-708-6(ナガセケムテックス(株)社製)20重量部と、アクリルポリマーとしてUC-3900(東亞合成(株)社製)10重量部と、フラックス作用を有する化合物としてフェノールフタリン(東京化成(株)社製)15重量部と、シランカップリング剤としてKBM-303(信越シリコーン(株)社製)0.5重量部と、イミダゾール化合物として2P4MZ(四国化成(株)社製)0.01重量部と、をアセトンに溶解し、ワニス状の樹脂組成物を作製した。
上記で得られたワニス状の樹脂組成物を、ポリエステルシート(基材)にコンマコータを用いて塗布し、上記アセトンが揮発する温度100℃で3分間乾燥させて、基材上に形成された厚み35μmのフィルム状樹脂層(a)を得た。
基材上に形成されたフィルム状の樹脂層(a)を、回路基板の半田5バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した(樹脂層配置工程)。
次に、回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行い、積層体を得た(位置合わせ工程)。
次に、平板プレス機((株)システム開発 社製 MSA-2)により230℃、0.2MPaで、5秒間、積層体を加熱圧縮し、回路基板の半田バンプ(第一の端子)と半導体チップのAuバンプ(第二の端子)を接合した(半田接合工程)。
次に、市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、180℃、60分間加熱し(加圧硬化工程(1))、電子装置を作製した。
実施例1で得られた電子装置について、以下の評価を行った。評価項目を内容と共に示し、得られた結果を表1に示す。
1.導通接続の測定
得られた電子装置について、任意に選択した隣接する2箇所の半田接合部の接続抵抗を、デジタルマルチメータにより測定した。次いで、他に9点、隣接する2箇所の半田接合部を任意に選択し、同様に、接続抵抗を測定し、合計10点の導通接続の測定を行った。各符号は、以下の通りである。
○:10点全てで導通が取れた場合
×:1点でも導通不良があった場合
2.支持体と被着体の間の硬化物中のマイクロボイドの有無
得られた電子装置を切断し、硬化物の断面を研磨した。次いで、支持体、被着体及び隣接する2つの半田接合部で囲まれた部分を、任意に10箇所選択し、各部分のマイクロボイドの有無を金属顕微鏡にて観察した。各符号は、以下の通りである。
○:10箇所全てでマイクロボイドが観察されなかった場合
×:1箇所でもマイクロボイドが観察された場合
(電子装置の作製および評価)
半田接合工程における加熱圧縮時間を5秒から15秒に変更した以外は、実施例1と同様に電子装置を作製し、評価を実施した。
(電子装置の作製および評価)
半田接合工程における加熱圧縮時間を5秒から115秒に変更した以外は、実施例1と同様に電子装置を作製し、評価を実施した。
(フィルム状樹脂層の作製)
エポキシ樹脂としてビスフェノールA型エポキシ樹脂EPICLON-840S(大日本インキ化学(株)社製)45重量部と、フェノールノボラック樹脂としてPR-53467(住友ベークライト(株)社製)15重量部と、フェノキシ樹脂としてYP-50(東都化成(株)社製)25重量部と、フラックス作用を有する化合物としてフェノールフタリン(東京化成(株)社製)15重量部と、シランカップリング剤としてKBM-303(信越シリコーン(株)社製)0.5重量部と、イミダゾール化合物として2P4MZ(四国化成(株)社製)0.01重量部と、をアセトンに溶解し、ワニス状の樹脂組成物を作製した。
上記で得られたワニス状の樹脂組成物を、ポリエステルシート(基材)にコンマコータを用いて塗布し、上記アセトンが揮発する温度100℃で3分間乾燥させて、基材上に形成された厚み35μmのフィルム状樹脂層(b)を得た。
(電子装置の作製および評価)
樹脂層配置工程において、フィルム状樹脂層(a)に代えて、フィルム状樹脂層(b)を用いた以外は、実施例2と同様に電子装置を作製し、評価を実施した。
(フィルム状樹脂層の作製)
実施例4と同様の方法で、フィルム状樹脂層(b)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状樹脂層(b)を、回路基板の半田5バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した(樹脂層配置工程)。
回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行い、積層体を得た(位置合わせ工程)。
次に、市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、180℃、60分間加熱した(加圧硬化工程)。
次いで、平板プレス機((株)システム開発 社製 MSA-2)により230℃、0.2MPaで、15秒間積層体を加熱圧縮し、半田接合を行い(半田接合工程)、電子装置を作製した。
次いで、実施例1と同様の評価を実施した。
(フィルム状樹脂層の作製)
実施例4と同様の方法で、フィルム状樹脂層(b)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状樹脂層(b)を、回路基板の半田5バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した。
回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間で加熱圧縮を行い、積層体を得た(位置合わせ工程)。
次に、市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、120℃、5分間加熱した(第一加圧硬化工程)。
次いで、平板プレス機((株)システム開発 社製 MSA-2)により230℃、0.2MPaで、15秒間積層体を加熱圧縮し、半田接合を行った(半田接合工程)。
次いで、第一加圧硬化工程で用いた市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、180℃、60分間加熱し(第二加圧硬化工程)、電子装置を作製した。
次いで、実施例1と同様の評価を実施した。
(フィルム状樹脂層の作製)
実施例4と同様の方法で、フィルム状樹脂層(b)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状樹脂層(b)を、回路基板の半田5バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した。
回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行い、積層体を得た(位置合わせ工程)。
次に、市販の加圧対応型オーブン内に平板プレス機を設置し、平板プレス機に、前記積層体を取り付け、空気によりオーブンの内部を加圧力0.5MPaに加圧しつつ(積層体を0.5MPaで加圧しつつ)、180℃で加熱を開始した。そして、180℃での加熱開始後、5分経過した時点で、180℃、加圧力0.5MPaの加圧雰囲気中、加圧対応型オーブン内に設置した平板プレス機で、プレス面の温度を230℃にして、0.2MPaで、15秒間加熱圧縮を行った。そして、その後も、180℃、加圧力0.5MPaの加圧雰囲気下での加熱を続け、180℃での加熱開始から60分間加熱を行い(半田接合兼加圧硬化工程)、電子装置を作製した。
次いで、実施例1と同様の評価を実施した。
なお、表1では、半田接合を230℃、0.2MPa、15秒で実施していると記載しているが、この半田接合工程中にも、樹脂層の硬化は進んでいる。
(液状の樹脂組成物の作製)
エポキシ樹脂としてビスフェノールF型エポキシ樹脂EXA-830LVP(大日本インキ化学(株)社製)70重量部と、フェノールノボラック樹脂としてPR-53467(住友ベークライト(株)社製)20重量部と、フラックス作用を有する化合物としてフェノールフタリン(東京化成(株)社製)10重量部と、イミダゾール化合物として2P4MZ(四国化成(株)社製)0.5重量部と、を3本ロールで混合し液状の樹脂組成物(c)を作製した。
(電子装置の作製および評価)
フィルム状樹脂層(b)を、回路基板の半田5バンプが形成された面にラミネートすることに代えて、回路基板の半田5バンプが形成された面に、液状の樹脂組成物(c)を厚さ35μmになるように塗布し、樹脂層を形成させたこと以外は、実施例2と同様に電子装置を作製し、評価を実施した。
(樹脂ワニスの作製)
エポキシ樹脂としてクレゾールノボラック型エポキシ樹脂EOCN-1020-70(日本化薬(株)社製)50重量部と、フェノールノボラック樹脂としてPR-53467(住友ベークライト(株)社製)25重量部と、フラックス作用を有する化合物としてフェノールフタリン(東京化成(株)社製)25重量部と、イミダゾール化合物として2P4MZ(四国化成(株)社製)0.2重量部とを、エチレングリコールモノブチルエーテルアセテートに溶解し固形分濃度80%のワニスを作製し、得られたワニスを3本ロールで混合し樹脂ワニス(d)層を作製した。
(電子装置の作製および評価)
フィルム状樹脂層(b)を、回路基板の半田5バンプが形成された面にラミネートすることに代えて、回路基板の半田5バンプバンプが形成された面に、樹脂ワニス(d)を厚さ35μmになるように塗布し、さらに、100℃、10分乾燥して溶剤を揮発させて、樹脂層を形成させたこと以外は、実施例2と同様に電子装置を作製し、評価を実施した。
(フィルム状樹脂層の作製)
実施例1と同様の方法で、フィルム状樹脂層(a)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状樹脂層(a)を、回路基板の半田5バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した(樹脂層配置工程)。
回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行い、積層体を得た(位置合わせ工程)。
次に、市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、180℃、60分間加熱した(加圧硬化工程)。
次いで、リフロー装置(株式会社大和製作所製NRY325-5Z)を用いて加熱して、半田接合を行い(半田接合工程)、電子装置を作製した。つまり、圧縮せずに加熱して、半田接合を行った。このとき、加熱条件は、150~180℃で90秒間、次いで、220℃で45秒間であった。
次いで、実施例1と同様の評価を実施した。
(フィルム状樹脂層の作製)
実施例1と同様の方法で、フィルム状樹脂層(a)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状の樹脂層(a)を、回路基板の半田バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した(樹脂層配置工程)。
次に、回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行い、積層体を得た(位置合わせ工程)。
次に、市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、230℃、60分間加熱し(半田接合および樹脂加圧硬化工程)、電子装置を作製した。
[実施例12]
(フィルム状樹脂層の作製)
実施例1と同様の方法で、フィルム状樹脂層(a)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状の樹脂層(a)を、回路基板の半田バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した(樹脂層配置工程)。
次に、回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行い積層体を得た(位置合わせ工程)。
次に、市販の加圧対応型オーブンにおいて空気によりオーブンの内部を加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、230℃、0.5分間加熱し、その後、加圧力0.5MPaで加圧しつつ(積層体を0.5MPaで加圧しつつ)、180℃、60分間加熱し(半田接合および樹脂加圧硬化工程)、電子装置を作製した。
(フィルム状樹脂層の作製)
実施例1と同様の方法で、フィルム状樹脂層(a)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状の樹脂層(a)を、回路基板の半田バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した。
次に、回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行った。
次に、平板プレス機((株)システム開発 社製 MSA-2)により230℃、0.2MPaで、5秒間加熱圧縮し、回路基板の半田バンプと半導体チップのAuバンプを接合した(半田接合)。
次に、市販のオーブン中で、大気圧下(非加圧硬化、加圧流体により加圧を行わず、加圧力:0MPa)で、180℃、60分間加熱し、電子装置を作製した。 次いで、実施例1と同様の評価を実施した。
(電子装置の作製および評価)
半田接合における加熱圧縮時間を5秒から15秒に変更した以外は、比較例1と同様に電子装置を作製し、評価を実施した。
(電子装置の作製および評価)
半田接合における加熱圧縮時間を5秒から115秒に変更した以外は、比較例1と同様に電子装置を作製し、評価を実施した。
(フィルム状樹脂層の作製)
実施例4と同様の方法で、フィルム状樹脂層(b)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状樹脂層(b)を、回路基板の半田バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した。
回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行った。
次に、市販のオーブン中で、大気圧下(非加圧硬化、加圧流体により加圧を行わず、加圧力:0MPa)で、180℃、60分間加熱した。
次いで、平板プレス機((株)システム開発 社製 MSA-2)により230℃、0.2MPaで、15秒間加圧圧縮し、半田接合を行い、電子装置を作製した。
次いで、実施例1と同様の評価を実施した。
(フィルム状樹脂層の作製)
実施例1と同様の方法で、フィルム状樹脂層(a)を得た。
(電子装置の作製および評価)
基材上に形成されたフィルム状樹脂層(a)を、回路基板の半田バンプが形成された面に、ロールラミネーターを用い、温度:120℃、速度50cm/分の条件でラミネートし、次いで、基材を剥離した。
回路基板の第一の端子と半導体チップの第二の端子が対向するように位置合わせし、フリップチップボンダー(澁谷工業(株)社製 DP-200)により80℃、0.05MPaで、7秒間加熱圧縮を行った。
次に、市販のオーブン中で、大気圧下(非加圧硬化、加圧流体により加圧を行わず、加圧力:0MPa)で、180℃、60分間加熱した。
次いで、リフロー装置(株式会社大和製作所製NRY325-5Z)を用いて加熱して、半田接合を行い、電子装置を作製した。つまり、圧縮せずに加熱して、半田接合を行った。このとき、加熱条件は、150~180℃で90秒間、次いで、220℃で45秒間であった。
次いで、実施例1と同様の評価を実施した。
積層体を加圧せずに、半田接合および樹脂硬化工程を実施した点以外は、実施例11と同様である。
これに対し、比較例1~7では、マイクロボイドが発生し、導通不良が発生していた。
また、実施例4、6,7の電子装置と実施例5の電子装置を比較すると、実施例4、6,7の電子装置の方が実施例5の電子装置に比べ、半田の濡れ広がりが良好であることがわかった。
また、実施例4~7の電子装置は、上述したマイクロボイドの有無の測定では、いずれもマイクロボイド無しとされたが、すべての端子間のマイクロボイドの有無を確認したところ、実施例4の電子装置では、非常に小さなマイクロボイドの発生が確認できた。実施例5~7の電子装置では、いずれもマイクロボイドは発生していなかった。ただし、実施例4で確認されたマイクロボイドは、比較例1~7で確認されたものよりも小さく、実用上問題とはならない大きさであった。また、実施例4で確認されたマイクロボイドの数も比較例1~7よりも少なく、実用上問題とならない。
また、実施例1~12において、樹脂層を硬化させる際の樹脂層の加圧力を0.5MPaとしたが、加圧力を10MPaとした場合であっても、同様の効果が得られた。
さらに、実施例1~12はいずれもフラックス作用を有する樹脂層がエポキシ樹脂を含むものであったが、エポキシ樹脂にかえて他の熱硬化性樹脂(オキセタン樹脂等)を含むものであった場合にも、実施例1~12と同様、ボイドの発生を抑制することができることが確認された。
なお、上述した実施例1~12で使用した樹脂層の100℃~200℃における最低溶融粘度は、2Pa・sであった。
最低溶融粘度は、粘弾性測定装置であるレオメーターを用いて、フィルム状態のサンプルに10℃/分の昇温速度で、周波数1Hzのずり剪断を与えて測定した。
なお、樹脂層が液状の樹脂組成物の場合には、溶剤を乾燥させてフィルム状にして測定をおこなった。
(フィルム状樹脂層の作製)
エポキシ樹脂としてクレゾールノボラック型エポキシ樹脂EOCN-102070(日本化薬(株)社製)45重量部と、フェノールノボラック樹脂としてPR-53467(住友ベークライト(株)社製)15重量部と、フェノキシ樹脂として、YP-50(東都化成(株)社製)を15重量部と、フラックス作用を有する化合物としてフェノールフタリン(東京化成(株)社製)15重量部と、シランカップリング剤としてKBM-303(信越シリコーン(株)社製)1.0重量部と、イミダゾール化合物として2P4MZ(四国化成(株)社製)0.05重量部とをアセトンに溶解し、さらに、フィラー(アドマテックス社製、SE6050、平均粒径2μm)を10重量部添加して、ワニス状の樹脂組成物を作製した。
上記で得られたワニス状の樹脂組成物を、ポリエステルシート(基材)にコンマコータを用いて塗布し、上記アセトンが揮発する温度100℃で3分間乾燥させて、基材上に形成された厚み35μmのフィルム状樹脂層を得た。
基材上に形成されたフィルム状の樹脂層を使用して、実施例1と同様に電子装置を作製した。
実施例1で得られた電子装置について、実施例1と同様の評価を行った。
(フィルム状樹脂層の作製)
実施例13の樹脂層において、フィラー(アドマテックス社製、SE6050、平均粒径2μm)を添加して、ワニス状の樹脂組成物の添加量を30重量部とした点以外は、実施例13と同様の樹脂層を作製した。
その後、実施例13と同様に電子装置を作製し、実施例1と同様の評価を行った。
(フィルム状樹脂層の作製)
実施例13の樹脂層において、フィラー(アドマテックス社製、SE6050、平均粒径2μm)を添加して、ワニス状の樹脂組成物の添加量を60重量部とした点以外は、実施例13と同様の樹脂層を作製した。
その後、実施例13と同様に電子装置を作製し、実施例1と同様の評価を行った。
最低溶融粘度は、粘弾性測定装置であるレオメーターを用いて、フィルム状態のサンプルに10℃/分の昇温速度で、周波数1Hzのずり剪断を与えて測定した。
実施例13~15では、いずれも、マイクロボイドおよび導通不良が発生しなかった。
また、実施例13~15のように、実施例1に比べ最低溶融粘度が高い樹脂層を使用した方が、マイクロボイドの発生をより確実に抑制できることが確認された。
Claims (11)
- 第一電子部品の第一の端子と、第二電子部品の第二の端子とを、半田を用いて接合して、該第一電子部品と該第二電子部品とを電気的に接続する電子装置の製造方法であって、
前記第一の端子または第二の端子上に前記半田が設けられており、
該第一の端子と該第二の端子との間に、フラックス作用を有する樹脂層を配置して、前記第一電子部品、前記第二電子部品、前記樹脂層とを含む積層体を得る工程と、
該第一の端子と該第二の端子とを、半田接合させる半田接合工程と、
加圧流体により前記積層体を加圧しながら、該樹脂層を硬化させる加圧硬化工程と、
を行う電子装置の製造方法。 - 請求項1に記載の電子装置の製造方法において、
前記加圧硬化工程を実施した後、再度加圧流体により、前記積層体を加圧しながら、前記樹脂層をさらに、硬化させる電子装置の製造方法。 - 請求項1または2に記載の電子装置の製造方法において、
前記加圧流体により、前記積層体を加圧しながら、前記第一の端子と第二の端子とを半田接合させるとともに、前記樹脂層を硬化させ、前記半田接合工程と、前記加圧硬化工程とを実施する電子装置の製造方法。 - 請求項1乃至3のいずれかに記載の電子装置の製造方法において、
前記加圧硬化工程では、前記積層体を容器内に設置し、前記容器内に前記加圧流体を導入し、前記積層体を加圧する電子装置の製造方法。 - 請求項1乃至4のいずれかに記載の電子装置の製造方法において、
前記加圧流体が気体である電子装置の製造方法。 - 請求項5に記載の電子装置の製造方法において、
前記加圧流体が空気である電子装置の製造方法。 - 請求項1乃至6のいずれかに記載の電子装置の製造方法において、
前記加圧硬化工程では、前記加圧流体により、0.1MPa以上、10MPa以下の圧力を前記積層体に加圧する電子装置の製造方法。 - 請求項1乃至7のいずれかに記載の電子装置の製造方法において、
前記樹脂層の100~200℃における最低溶融粘度が1~10000Pa・sである電子装置の製造方法。 - 請求項1乃至8のいずれかに記載の電子装置の製造方法において、
前記樹脂層は熱硬化性樹脂を含む電子装置の製造方法。 - 前記樹脂層が、少なくとも1つ以上のフェノール性水酸基を有する樹脂(A)と、その硬化剤として作用する樹脂(B)と、を含むことを特徴とする請求項1~9いずれか1項に記載の電子装置の製造方法。
- 請求項1~10のいずれか1項に記載の製造方法により製造されることを特徴とする電子装置。
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- 2009-10-30 JP JP2010536667A patent/JP5533663B2/ja not_active Expired - Fee Related
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- 2009-10-30 EP EP09824572.3A patent/EP2384103A4/en not_active Withdrawn
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JP2011211156A (ja) * | 2009-10-19 | 2011-10-20 | Sumitomo Bakelite Co Ltd | 電子装置の製造方法および電子装置 |
JP2011250327A (ja) * | 2010-05-28 | 2011-12-08 | Murata Mfg Co Ltd | 超音波センサ |
JP2012023338A (ja) * | 2010-06-14 | 2012-02-02 | Hitachi Chem Co Ltd | 回路接続用接着フィルム、これを用いた回路接続構造体及び回路部材の接続方法 |
JP2012104782A (ja) * | 2010-11-15 | 2012-05-31 | Elpida Memory Inc | 半導体装置の製造方法および装置 |
JP2013045945A (ja) * | 2011-08-25 | 2013-03-04 | Sumitomo Bakelite Co Ltd | 半導体装置の製造方法 |
JP2013123033A (ja) * | 2011-11-09 | 2013-06-20 | Sekisui Chem Co Ltd | 半導体装置の製造方法 |
JP2016537205A (ja) * | 2013-10-25 | 2016-12-01 | 広州漢源新材料有限公司 | 半田プリフォームフラックスの被覆工程 |
WO2015186704A1 (ja) * | 2014-06-05 | 2015-12-10 | 積水化学工業株式会社 | 導電ペースト、接続構造体及び接続構造体の製造方法 |
JP5860191B1 (ja) * | 2014-06-05 | 2016-02-16 | 積水化学工業株式会社 | 導電ペースト、接続構造体及び接続構造体の製造方法 |
JPWO2016056619A1 (ja) * | 2014-10-10 | 2017-07-27 | ナミックス株式会社 | 熱硬化性樹脂組成物及びその製造方法 |
KR20170066424A (ko) * | 2014-10-10 | 2017-06-14 | 나믹스 가부시끼가이샤 | 열경화성 수지 조성물 및 그의 제조 방법 |
WO2016056619A1 (ja) * | 2014-10-10 | 2016-04-14 | ナミックス株式会社 | 熱硬化性樹脂組成物及びその製造方法 |
US10388583B2 (en) | 2014-10-10 | 2019-08-20 | Namics Corporation | Thermosetting resin composition and method of producing same |
KR102319292B1 (ko) * | 2014-10-10 | 2021-11-01 | 나믹스 가부시끼가이샤 | 열경화성 수지 조성물 및 그의 제조 방법 |
JP2016082001A (ja) * | 2014-10-14 | 2016-05-16 | 住友ベークライト株式会社 | 半導体装置の製造方法および電子部品の製造方法 |
WO2016084707A1 (ja) * | 2014-11-28 | 2016-06-02 | 日東電工株式会社 | シート状樹脂組成物、積層シート及び半導体装置の製造方法 |
JP2016141739A (ja) * | 2015-02-02 | 2016-08-08 | ナミックス株式会社 | フィルム状接着剤、それを用いた半導体装置 |
WO2016125537A1 (ja) * | 2015-02-02 | 2016-08-11 | ナミックス株式会社 | フィルム状接着剤、それを用いた半導体装置 |
US10023775B2 (en) | 2015-02-02 | 2018-07-17 | Namics Corporation | Film adhesive and semiconductor device including the same |
WO2022039221A1 (ja) * | 2020-08-21 | 2022-02-24 | パナソニックIpマネジメント株式会社 | はんだ組成物 |
Also Published As
Publication number | Publication date |
---|---|
EP2384103A1 (en) | 2011-11-02 |
EP2384103A4 (en) | 2014-01-08 |
CN102204420A (zh) | 2011-09-28 |
JP5533663B2 (ja) | 2014-06-25 |
US20110221075A1 (en) | 2011-09-15 |
US8389328B2 (en) | 2013-03-05 |
JP2014096608A (ja) | 2014-05-22 |
KR20110082073A (ko) | 2011-07-15 |
TW201027640A (en) | 2010-07-16 |
TWI503900B (zh) | 2015-10-11 |
CN102204420B (zh) | 2013-11-13 |
JPWO2010052871A1 (ja) | 2012-04-05 |
KR101633945B1 (ko) | 2016-06-27 |
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