WO2011125414A1 - 電子部品及びその製造方法 - Google Patents
電子部品及びその製造方法 Download PDFInfo
- Publication number
- WO2011125414A1 WO2011125414A1 PCT/JP2011/055791 JP2011055791W WO2011125414A1 WO 2011125414 A1 WO2011125414 A1 WO 2011125414A1 JP 2011055791 W JP2011055791 W JP 2011055791W WO 2011125414 A1 WO2011125414 A1 WO 2011125414A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electronic component
- organic filler
- inorganic filler
- adhesive
- main body
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000012766 organic filler Substances 0.000 claims abstract description 80
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000011256 inorganic filler Substances 0.000 claims abstract description 69
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 69
- 239000012790 adhesive layer Substances 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims description 56
- 230000001070 adhesive effect Effects 0.000 claims description 54
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229920001187 thermosetting polymer Polymers 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000011342 resin composition Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/295—Organic, e.g. plastic containing a filler
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
- H03H9/1035—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by two sealing substrates sandwiching the piezoelectric layer of the BAW device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to an electronic component and a manufacturing method thereof.
- the present invention relates to an electronic component having a sealing structure and a method for manufacturing the same.
- a sealing structure such as a piezoelectric vibration component including a piezoelectric vibration element
- a sealing member is bonded to the electronic component main body with an adhesive.
- the sealing member is usually made of a material having low air permeability such as metal.
- the adhesive is relatively air permeable. For this reason, internal gas may leak through the adhesive layer, or external air or moisture may flow into the hermetic chamber through the adhesive layer. Therefore, an adhesive having low air permeability has been strongly demanded.
- Patent Document 1 discloses an adhesive composition containing an epoxy resin, a curing agent, an inorganic filler, and a rubber component as essential components as an adhesive composition that can be used for sealing electronic components. Has been.
- Patent Document 1 Even if an adhesive composition containing an inorganic filler as described in Patent Document 1 is used, it is difficult to seal an electronic component with sufficiently high airtightness. It was difficult to obtain electronic parts.
- the present invention has been made in view of the above points, and an object of the present invention is to provide an electronic component having a sealing structure having excellent reliability and a method for manufacturing the same.
- the electronic component according to the present invention includes an electronic component main body, a sealing member, and an adhesive layer.
- the sealing member seals the electronic component main body.
- the adhesive layer bonds the electronic component main body and the sealing member.
- a sealing space is formed between the electronic component main body and the sealing member.
- the adhesive layer includes an organic filler and an inorganic filler.
- the organic filler is in contact with both the electronic component body and the sealing member.
- the inorganic filler has a minimum particle size smaller than the thickness of the adhesive layer. When viewed from the thickness direction of the adhesive layer, an inorganic filler is interposed between the organic filler and the electronic component main body and between the organic filler and the sealing member.
- the organic filler is in pressure contact with both the electronic component main body and the sealing member. In this case, since the airtightness of the electronic component can be further increased, an electronic component with higher reliability can be obtained.
- the ratio of the minimum particle diameter of the inorganic filler to the thickness of the adhesive layer ((minimum particle diameter of the inorganic filler) / (thickness of the adhesive layer)) is 0. It is within the range of 004 to 0.6. According to this structure, the airtightness of an electronic component can be improved more. Therefore, an electronic component with higher reliability can be obtained.
- the “minimum particle diameter of the inorganic filler” is the thickness of the inorganic filler.
- the content of the inorganic filler in the adhesive layer is in the range of 20% by mass to 45% by mass.
- adhesive strength may fall too much.
- the content of the inorganic filler in the adhesive layer is too small, sealing failure may occur.
- the organic filler is made of an elastic body. In this case, a leak path is less likely to be formed between the organic filler, the electronic component main body, and the sealing member. Therefore, more excellent reliability can be realized.
- the organic filler is made of silicone rubber.
- the organic filler is made of an acrylic resin composition, a vinyl chloride resin composition, or polyamide.
- the inorganic filler is made of alumina, silica, talc, calcium carbonate, or aluminum nitride.
- the adhesive layer is formed by curing a thermosetting resin containing an organic filler and an inorganic filler.
- the method for manufacturing an electronic component according to the present invention relates to the method for manufacturing an electronic component according to the present invention.
- An electronic component manufacturing method according to the present invention includes a step of placing an adhesive containing an organic filler and an inorganic filler between an electronic component body and a sealing member, and the electronic component body and the sealing member.
- the adhesive when the adhesive is cured in the curing step, the electronic component main body and the sealing member are used, and the organic filler is formed by the electronic component main body and the sealing member. Pressurize to be deformed by being pressed.
- the organic filler is in contact with both the electronic component main body and the sealing member. Further, when viewed from the thickness direction of the adhesive layer, an inorganic filler is interposed between the organic filler and the electronic component main body and between the organic filler and the sealing member. For this reason, the outstanding reliability is realizable.
- FIG. 1 is a schematic exploded perspective view of an electronic component according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG.
- FIG. 3 is a schematic cross-sectional view of a part of an electronic component according to a reference example.
- 4 is an enlarged cross-sectional photograph of the electronic component of Example 1.
- FIG. 5 is an enlarged cross-sectional photograph of the electronic component of Comparative Example 1.
- the electronic component 1 shown in FIG. 1 is merely an example.
- the present invention is not limited to the electronic component 1 at all.
- FIG. 1 is a schematic exploded perspective view of an electronic component according to this embodiment.
- FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG.
- the electronic component 1 includes an electronic component main body 10.
- the electronic component main body 10 includes a piezoelectric vibrator 10a and holding members 10b and 10c that hold the piezoelectric vibrator 10a.
- the type and shape dimensions of the electronic component main body 10 are not particularly limited as long as an airtight space is required.
- the electronic component body 10 may include, for example, a surface acoustic wave element, a MEMS (Micro Electro Mechanical Systems) element, or the like.
- the electronic component main body 10 is formed in a plate shape, but the shape of the electronic component main body 10 is not limited to a plate shape.
- the sealing members 11 and 12 are preferably made of a material having low air permeability.
- the sealing members 11 and 12 can be formed of metal, ceramics, resin, or the like, for example.
- the sealing members 11 and 12 and the electronic component main body 10 are bonded by adhesive layers 13a and 13b.
- the adhesive layers 13a and 13b are formed by curing a resin adhesive such as a thermosetting resin adhesive including the organic filler 15 and the inorganic filler 16 shown in FIG.
- the adhesive layers 13 a and 13 b are made of a cured resin adhesive 14 including an organic filler 15 and an inorganic filler 16. More specifically, in this embodiment, the adhesive layers 13 a and 13 b are made of a thermosetting resin adhesive cured product 14 including an organic filler 15 and an inorganic filler 16.
- the organic filler 15 is preferably made of an elastic body having elasticity. Specifically, the organic filler 15 is preferably formed of an elastic material such as silicone rubber.
- the organic filler 15 may be made of, for example, an acrylic resin composition, a vinyl chloride resin composition, or polyamide.
- the organic filler 15 is in contact with both the electronic component main body 10 and the sealing members 11 and 12. Specifically, the organic filler 15 is in pressure contact with both the electronic component main body 10 and the sealing members 11 and 12.
- the shape of the inorganic filler 16 is not particularly limited. In the present embodiment, specifically, the shape of the inorganic filler 16 is substantially spherical.
- the electronic component 1 is sealed between the electronic component body 10 and the sealing members 11 and 12 after an adhesive including an organic filler 15 and an inorganic filler 16 is disposed between the electronic component body 10 and the sealing members 11 and 12. It can be manufactured by curing the adhesive while pressing the members 11 and 12 in a direction approaching each other.
- an adhesive including an organic filler 15 and an inorganic filler 16 is applied to one of the electronic component body 10 and the sealing members 11 and 12.
- coating of an adhesive agent can be performed by various printing methods, such as a screen printing method and an inkjet printing method, for example.
- the preheating temperature can be, for example, about 50 ° C. to 100 ° C.
- the electronic component main body 10 and the sealing members 11 and 12 are opposed to each other with an adhesive, and the electronic component main body 10 and the sealing members 11 and 12 are heated in a state where they are pressurized in a direction approaching each other.
- the electronic component 1 can be completed by curing the adhesive and forming the adhesive layers 13a and 13b.
- the maximum particle size of the organic filler 15 contained in the thermosetting adhesive before curing is larger than the thickness of the adhesive layers 13a and 13b in the electronic component 1.
- the shape of the organic filler 15 is not particularly limited.
- the organic filler 15 may be, for example, spherical or flat.
- thermosetting resin adhesive containing only the inorganic filler 116 when the adhesive is thermoset, the air in the space formed between the electronic component main body 110 and the sealing member 111 is also heated and thermally expanded. This thermally expanded air flows out through the uncured adhesive. For this reason, the through-hole 100 called a leak path
- the adhesive layers 13a and 13b include the organic filler 15 together with the inorganic filler 16. Then, the adhesive is cured while pressing the electronic component body 10 and the sealing members 11 and 12 in a direction approaching each other so that the organic filler 15 contacts both the electronic component body 10 and the sealing members 11 and 12. Let Moreover, the inorganic filler 16 is between the organic filler 15 and the electronic component main body 10 and between the organic filler 15 and the sealing members 11 and 12 when viewed from the thickness direction z of the adhesive layers 13a and 13b. Intervene.
- the organic filler 15 is in pressure contact with both the electronic component body 10 and the sealing members 11 and 12. Therefore, more excellent reliability can be realized. Furthermore, when the organic filler 15 is made of an elastic body having elasticity, it is difficult for a leak path to be further formed between the organic filler 15 and the electronic component body 10 and the sealing members 11 and 12. Therefore, further excellent reliability can be realized.
- the inorganic filler having a relatively small minimum particle size also has a function of increasing the viscosity of the adhesive.
- the viscosity of the adhesive can be increased to a viscosity at which a leak path is not easily formed. it can. That is, when the adhesive contains no inorganic filler, the viscosity of the adhesive becomes too low and a leak path is likely to be formed.
- the viscosity of the adhesive can be effectively increased, and a leak path is formed in the gap between the organic filler and the electronic component body or sealing member. Can be effectively suppressed.
- the ratio of the minimum particle diameter of the inorganic filler 16 to the thickness of the adhesive layers 13a and 13b ((minimum particle diameter of the inorganic filler 16) / (thickness of the adhesive layers 13a and 13b). )) Is preferably in the range of 0.004 to 0.6. If (the minimum particle diameter of the inorganic filler 16) / (the thickness of the adhesive layers 13a and 13b) is too large, a leak path may be formed. If (the minimum particle diameter of the inorganic filler 16) / (the thickness of the adhesive layers 13a and 13b) is too small, a leak path may be formed.
- the content of the organic filler 15 in the adhesive layers 13a and 13b is preferably in the range of 5% by mass to 30% by mass, for example. If the content of the organic filler 15 in the adhesive layers 13a and 13b is too large, the adhesive strength may be lowered. On the other hand, if the content of the organic filler 15 in the adhesive layers 13a and 13b is too small, a leak path may be formed.
- the content of the inorganic filler 16 in the adhesive layers 13a and 13b is preferably in the range of 20% by mass to 45% by mass. If the content of the inorganic filler 16 in the adhesive layers 13a and 13b is too large, the adhesive strength may be lowered. On the other hand, if the content of the inorganic filler 16 in the adhesive layers 13a and 13b is too small, a leak path may be formed.
- Example 1 the electronic component 1 according to the above embodiment was manufactured in the following manner. Specifically, first, an adhesive was applied to the sealing members 11 and 12 by a screen printing method.
- the adhesive used here was made of a thermosetting epoxy resin including an organic filler 15 made of a crosslinked acrylic resin and a flat inorganic filler made of silica and an inorganic filler 16 made of alumina.
- the average particle diameter of the organic filler 15 was 20 ⁇ m.
- the minimum thickness of the inorganic filler was 3 ⁇ m, and the maximum length of the inorganic filler in plan view was 14 ⁇ m.
- the average particle diameter of the inorganic filler 16 made of alumina was 0.1 ⁇ m.
- Content of the organic filler 15 in an adhesive agent was 12.5 mass%.
- the content of the inorganic filler 16 made of silica in the adhesive was 5% by mass.
- the content of the inorganic filler 16 made of alumina was 25% by mass.
- the electronic component body 10 was preheated to 75 ° C. ⁇ 10 ° C. Thereafter, the electronic component main body 10 and the sealing members 11 and 12 were bonded together and pressurized with a pressure of 90 kgf ⁇ 5 kgf. In this state, the electronic component 1 was completed by heating to 120 ° C. ⁇ 5 ° C. to solidify the adhesive to form the adhesive layers 13a and 13b.
- the thickness of the adhesive layers 13a and 13b was 7 ⁇ m.
- Fig. 4 shows a cross-sectional photograph of the fabricated electronic component.
- the organic filler 15 is in contact with both the electronic component body 10 and the sealing members 11 and 12.
- the inorganic filler 16 which consists of alumina intervenes in the clearance gap between the electronic component main body 10, the sealing members 11 and 12, and the organic filler 15.
- Example 1 An electronic component was fabricated in the same manner as in Example 1 except that an adhesive having the same configuration was used except that the organic filler 15 was not included.
- Example 2 An electronic component was produced in the same manner as in Example 1 except that an adhesive containing only the organic filler 15 and no inorganic filler was used. However, the adhesive containing no inorganic filler cannot be suitably applied because the viscosity is too low, and the electronic component main body and the sealing member cannot be suitably bonded.
- the leakage inspection of the electronic parts produced in each of Example 1 and Comparative Example 1 was performed. Specifically, the leakage inspection was performed by immersing the electronic component in an inert solution at 125 ° C. ⁇ 5 ° C. and visually inspecting whether or not bubbles are generated from the electronic component. As a result, no bubbles were observed in the electronic component produced in Example 1. On the other hand, bubbles were generated from the electronic component produced in Comparative Example 1.
- Example 2 As an organic filler, the average particle diameter is 20 ⁇ m, using particles made of an acrylic resin, and as an inorganic filler, using alumina particles having an average particle diameter of 0.1 ⁇ m, the content of the organic filler and the inorganic filler in the adhesive is set.
- 200 electronic components were produced in the same manner as in Example 1 except that the conditions were as shown in Table 1 below. About 200 manufactured electronic parts, the leak test
- Example 5 As an organic filler, the average particle diameter is 20 ⁇ m, using particles made of an acrylic resin, and as an inorganic filler, using alumina particles having an average particle diameter of 0.1 ⁇ m, the content of the organic filler and the inorganic filler in the adhesive is set.
- 200 electronic parts were produced in the same manner as in Example 1 except that the conditions were as shown in Table 2 below. About 200 manufactured electronic parts, the leak test
- Example 5 where the organic filler content was 10% by mass, the leakage failure rate was 1%, whereas the organic filler content was 20 to 45% by mass. In Examples 6 to 8, the leakage failure rate was 0%. From this result, it can be seen that the content of the organic filler in the adhesive is more preferably 20 to 45% by mass.
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
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Abstract
Description
本実施例では、上記実施形態に係る電子部品1を下記の要領で作製した。具体的には、まず、封止部材11,12に、接着剤を、スクリーン印刷法により塗布した。ここで使用した接着剤は、架橋アクリル樹脂からなる有機フィラー15と、シリカからなる、扁平形状の無機フィラー及びアルミナからなる無機フィラー16とを含む熱硬化型エポキシ樹脂からなるものであった。有機フィラー15の平均粒子径は20μmであった。無機フィラーの最小厚みは、3μmであり、無機フィラーの平面視における最大長さは14μmであった。アルミナからなる無機フィラー16の平均粒子径は、0.1μmであった。接着剤における有機フィラー15の含有量は、12.5質量%であった。接着剤における、シリカからなる無機フィラー16の含有量は、5質量%であった。アルミナからなる無機フィラー16の含有量は、25質量%であった。
有機フィラー15を含まないこと以外は同様の構成を有する接着剤を用いたこと以外は、上記実施例1と同様にして電子部品を作製した。
有機フィラー15のみを含み、無機フィラーを含まない接着剤を用いたこと以外は、上記実施例1と同様にして電子部品の作製を試みた。しかしながら、無機フィラーを含まない接着剤は、粘度が低すぎたため、好適に塗布できず、電子部品本体と封止部材とを好適に接着することができなかった。
上記実施例1及び比較例1のそれぞれにおいて作製した電子部品のリーク検査を行った。具体的には、125℃±5℃の不活性溶液に電子部品を浸漬し、電子部品から気泡が発生するか否かを目視検査することにより、リーク検査を行った。その結果、実施例1において作製した電子部品からは、気泡の発生は認められなかった。それに対して、比較例1において作製した電子部品からは、気泡が発生した。
有機フィラーとして、平均粒子径が20μmであり、アクリル樹脂からなる粒子を用い、無機フィラーとして、平均粒子径が0.1μmであるアルミナ粒子を用い、接着剤における有機フィラー及び無機フィラーの含有率を下記の表1に示す通りとしたこと以外は、上記実施例1と同様にして電子部品を200個作製した。作製した200個の電子部品につき、上記検査方法と同様の方法により、リーク検査を行った。その結果を下記の表1に示す。
有機フィラーとして、平均粒子径が20μmであり、アクリル樹脂からなる粒子を用い、無機フィラーとして、平均粒子径が0.1μmであるアルミナ粒子を用い、接着剤における有機フィラー及び無機フィラーの含有率を下記の表2に示す通りとしたこと以外は、上記実施例1と同様にして電子部品を200個作製した。作製した200個の電子部品につき、上記検査方法と同様の方法により、リーク検査を行った。その結果、を下記の表2に示す。
1a、1b…封止空間
10…電子部品本体
10a…圧電振動子
10b、10c…保持部材
11,12…封止部材
13a、13b…接着剤層
14…樹脂接着剤硬化物
15…有機フィラー
16…無機フィラー
Claims (12)
- 電子部品本体と、
前記電子部品本体を封止する封止部材と、
前記電子部品本体と前記封止部材とを接着している接着剤層とを備え、
前記電子部品本体と前記封止部材との間に封止空間が形成されており、
前記接着剤層は、前記電子部品本体と、前記封止部材との両方に接触している有機フィラーと、前記接着剤層の厚みよりも小さな最小粒子径を有する無機フィラーとを含み、
前記接着剤層の厚み方向から視たときに、前記有機フィラーと前記電子部品本体との間、及び前記有機フィラーと前記封止部材との間に前記無機フィラーが介在している、電子部品。 - 前記有機フィラーは、前記電子部品本体と前記封止部材との両方に圧接している、請求項1に記載の電子部品。
- 前記無機フィラーの最小粒子径の前記接着剤層の厚みに対する比((無機フィラーの最小粒子径)/(接着剤層の厚み))が、0.004~0.6の範囲内にある、請求項1または2に記載の電子部品。
- 前記接着剤層における前記有機フィラーの含有量は、5質量%~30質量%の範囲内にある、請求項1~3のいずれか一項に記載の電子部品。
- 前記接着剤層における前記無機フィラーの含有量は、20質量%~45質量%の範囲内にある、請求項1~4のいずれか一項に記載の電子部品。
- 前記有機フィラーは、弾性体からなる、請求項1~5のいずれか一項に記載の電子部品。
- 前記有機フィラーは、シリコーンゴムからなる、請求項6に記載の電子部品。
- 前記有機フィラーは、アクリル系樹脂組成物、塩化ビニル系樹脂組成物、またはポリアミドからなる、請求項1~5のいずれか一項に記載の電子部品。
- 前記無機フィラーは、アルミナ、シリカ、タルク、炭酸カルシウムまたは窒化アルミニウムからなる、請求項1~8のいずれか一項に記載の電子部品。
- 前記接着剤層は、前記有機フィラーと前記無機フィラーとを含む熱硬化性樹脂が硬化してなる、請求項1~9のいずれか一項に記載の電子部品。
- 請求項1~10のいずれか一項に記載の電子部品の製造方法であって、
前記電子部品本体と前記封止部材との間に、前記有機フィラーと前記無機フィラーとを含む接着剤を配置する工程と、
前記電子部品本体と前記封止部材とを、互いに近づく方向に加圧しながら、前記接着剤を熱硬化させることにより前記接着剤層を形成する硬化工程とを備える、電子部品の製造方法。 - 前記硬化工程において、前記接着剤を硬化させる際に、前記電子部品本体と前記封止部材とを、前記有機フィラーが前記電子部品本体と前記封止部材とにより押圧されて変形するように加圧する、請求項11に記載の電子部品の製造方法。
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