JP7491209B2 - 電気部品 - Google Patents
電気部品 Download PDFInfo
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- JP7491209B2 JP7491209B2 JP2020212682A JP2020212682A JP7491209B2 JP 7491209 B2 JP7491209 B2 JP 7491209B2 JP 2020212682 A JP2020212682 A JP 2020212682A JP 2020212682 A JP2020212682 A JP 2020212682A JP 7491209 B2 JP7491209 B2 JP 7491209B2
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- 229910000679 solder Inorganic materials 0.000 claims description 114
- 230000017525 heat dissipation Effects 0.000 claims description 80
- 230000004907 flux Effects 0.000 claims description 75
- 239000004065 semiconductor Substances 0.000 claims description 56
- 239000011248 coating agent Substances 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 18
- 230000007423 decrease Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000005304 joining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
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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
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49568—Lead-frames or other flat leads specifically adapted to facilitate heat dissipation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
- H01L23/3128—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation the substrate having spherical bumps for external connection
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- H01L23/00—Details of semiconductor or other solid state devices
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- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
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- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3672—Foil-like cooling fins or heat sinks
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- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3677—Wire-like or pin-like cooling fins or heat sinks
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- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49541—Geometry of the lead-frame
- H01L23/49548—Cross section geometry
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- H—ELECTRICITY
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/111—Pads for surface mounting, e.g. lay-out
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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
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3489—Composition of fluxes; Methods of application thereof; Other methods of activating the contact surfaces
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- H01—ELECTRIC ELEMENTS
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- 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
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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
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49541—Geometry of the lead-frame
- H01L23/49548—Cross section geometry
- H01L23/49551—Cross section geometry characterised by bent parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
- H05K1/0209—External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09372—Pads and lands
- H05K2201/094—Array of pads or lands differing from one another, e.g. in size, pitch, thickness; Using different connections on the pads
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10621—Components characterised by their electrical contacts
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10954—Other details of electrical connections
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10954—Other details of electrical connections
- H05K2201/10977—Encapsulated connections
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3431—Leadless components
- H05K3/3436—Leadless components having an array of bottom contacts, e.g. pad grid array or ball grid array components
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- Condensed Matter Physics & Semiconductors (AREA)
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Description
金属製の放熱部(20)と、放熱部に設けられる半導体素子(21)と、半導体素子に接続されるリード端子(22)と、放熱部とリード端子それぞれの一部と半導体素子を被覆する被覆樹脂(23)と、を備える半導体部品(11)と、
放熱部と半導体素子の並ぶ並び方向で放熱部と並ぶ金属製の第1搭載部(31)と、第1搭載部の並び方向の周りの外周に設けられ、リード端子の被覆樹脂から露出した部位と並び方向で並ぶ金属製の第2搭載部(32)と、第1搭載部と第2搭載部の設けられる絶縁基板(30)と、を備える配線基板(12)と、
第1搭載部と放熱部を接続する第1はんだ(13)と、
第2搭載部とリード端子の被覆樹脂から露出した部位を接続する第2はんだ(14)と、を有し、
第1はんだは放熱部と第1搭載部を接続するはんだ接続部(13a)とはんだ接続部の並び方向の周りに設けられるフラックス(13b)を有し、
並び方向における放熱部と配線基板との間の第1空間(100)のうちの、放熱部と第1搭載部の重複する第2空間(200)を除いた第2空間の並び方向の周りの放熱部と第1搭載部との非重複の第3空間(300)が環状を成し、
第3空間の一部と第2空間がはんだ接続部に占有され、
第3空間のうちのはんだ接続部の非占有の空間にフラックスのすべてが設けられている。
図1~図4に示すように電気部品10は半導体部品11と、配線基板12と、半導体部品11と配線基板12を接続する第1はんだ13及び第2はんだ14と、封止部26と、を備えている。電気部品10はQFN(Quad Flat Non-leaded Package)構造を成している。
先ず、半導体部品11について説明する。図1~図5に示すように、半導体部品11は、放熱部20と、半導体素子21と、複数のリード端子22と、被覆樹脂23と、を有している。
次に、配線基板12について説明する。配線基板12とは半導体部品11の搭載される基板のことである。配線基板12は樹脂などから成る絶縁基板30と第1ランド31と複数の第2ランド32を有している。
第1はんだ13とは、半導体部品11と配線基板12とを接続するはんだのうち、放熱部20と第1ランド31との間に設けられ、放熱部20と第1ランド31を電気的および機械的に接続するはんだである。
封止部26とは、はんだの寿命の低下を抑制するために配線基板12に設けられるエポキシ系樹脂などを含む熱硬化性の樹脂のことである。封止部26は絶縁性を有している。図4および図5に示すように封止部26は第3延長部22cと第2はんだ14を覆うようにして、半導体部品11のz方向周りの周方向に沿った外周に沿って設けられている。
以下に電気部品10の製造方法について説明する。先ず、半導体部品11と配線基板12を準備する。
リフロー処理が行われると、第1はんだ13から液状の第1フラックス13bが溶け出す。溶け出した第1フラックス13bは第1はんだ接続部13aを中心に配線基板12の端側に向かって濡れ拡がる。本実施形態では第1フラックス13bが、第1空間100から第1はんだ接続部13aの占有領域を除いた第4空間400に収まっている。
上記した第1フラックス残渣13cは以下に示す式によって算出される。それに伴い、x方向とy方向それぞれの第1ランド31の1辺の長さをa(mm)とする。第1はんだと第2はんだそれぞれのリフロー処理前のz方向の厚さをb(mm)とする。第1はんだと第2はんだそれぞれのリフロー処理前のはんだ密度をc(g/cm3)とする。リフロー処理前の第1はんだにおける第1フラックス13bの含有割合とリフロー処理前の第2はんだにおける第2フラックスの含有割合それぞれをd(wt%)とする。第1フラックス13bに含まれる第1フラックス残渣13cの割合をe(wt%)とする。第1フラックス残渣13cの密度をf(g/cm3)とする。リフロー処理後の第1はんだ接続部13aの密度をg(g/cm3)とする。x方向とy方向それぞれの放熱部20の1辺の長さをh(mm)とする。
本実施形態では上記したように第1空間100から第1はんだ接続部13aの占有領域を除いた第4空間400に第1フラックス13bのすべてが設けられている。言い換えれば第3空間300のうちの第1はんだ接続部13aの非占有の空間に第1フラックス13bのすべてが設けられている。そのために第1フラックス13bが第2ランド32に触れることが抑制される。第1フラックス13bがリード端子22に触れることが抑制される。
本実施形態では封止部26が第2はんだ接続部14aを覆うようにして半導体部品11の外周に塗布された形態を示した。しかしながら封止部26が半導体部品11の外周に加え、配線基板12と半導体部品11の間の空隙に設けられていてもよい。これによれば第1はんだ接続部13aと第2はんだ接続部14aそれぞれの寿命の低下が抑制されやすくなっている。
本実施形態では第1ランド31が正方形形状を成す形態について説明した。同様に放熱部20が正方形形状を成す形態について説明した。しかしながら第1ランド31と放熱部20の形態については限定されない。
Claims (4)
- 金属製の放熱部(20)と、前記放熱部に設けられる半導体素子(21)と、前記半導体素子に接続されるリード端子(22)と、前記放熱部と前記リード端子それぞれの一部と前記半導体素子を被覆する被覆樹脂(23)と、を備える半導体部品(11)と、
前記放熱部と前記半導体素子の並ぶ並び方向で前記放熱部と並ぶ金属製の第1搭載部(31)と、前記第1搭載部の前記並び方向の周りの外周に設けられ、前記リード端子の前記被覆樹脂から露出した部位と前記並び方向で並ぶ金属製の第2搭載部(32)と、前記第1搭載部と前記第2搭載部の設けられる絶縁基板(30)と、を備える配線基板(12)と、
前記第1搭載部と前記放熱部を接続する第1はんだ(13)と、
前記第2搭載部と前記リード端子の前記被覆樹脂から露出した部位を接続する第2はんだ(14)と、を有し、
前記第1はんだは前記放熱部と前記第1搭載部を接続するはんだ接続部(13a)と前記はんだ接続部の前記並び方向の周りに設けられるフラックス(13b)を有し、
前記並び方向における前記放熱部と前記配線基板との間の第1空間(100)のうちの、前記放熱部と前記第1搭載部の重複する第2空間(200)を除いた前記第2空間の前記並び方向の周りの前記放熱部と前記第1搭載部との非重複の第3空間(300)が環状を成し、
前記第3空間の一部と前記第2空間が前記はんだ接続部に占有され、
前記第3空間のうちの前記はんだ接続部の非占有の空間に前記フラックスのすべてが設けられている電気部品。 - 前記フラックスよりも液体成分の少ないフラックス残渣(13c)が、前記第3空間のうちの前記はんだ接続部の非占有の空間に設けられている請求項1に記載の電気部品。
- 前記第1搭載部が前記絶縁基板にインサートされ、
前記絶縁基板の前記半導体部品側の面と前記第1搭載部の前記半導体素子の搭載される面とが面一になっている請求項1または2に記載の電気部品。 - 前記リード端子における前記被覆樹脂から露出された部位と前記第2はんだを封止する絶縁性の封止部(26)を有する請求項1~3のいずれか1項に記載の電気部品。
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2004221415A (ja) | 2003-01-16 | 2004-08-05 | Nissan Motor Co Ltd | 半導体パッケージの実装構造 |
JP2009135470A (ja) | 2007-11-05 | 2009-06-18 | Panasonic Corp | 実装構造体 |
JP2013012569A (ja) | 2011-06-29 | 2013-01-17 | Denso Corp | 電子装置 |
JP2017216420A (ja) | 2016-06-02 | 2017-12-07 | パナソニックIpマネジメント株式会社 | Ledモジュール、及び照明器具 |
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JP2004221415A (ja) | 2003-01-16 | 2004-08-05 | Nissan Motor Co Ltd | 半導体パッケージの実装構造 |
JP2009135470A (ja) | 2007-11-05 | 2009-06-18 | Panasonic Corp | 実装構造体 |
JP2013012569A (ja) | 2011-06-29 | 2013-01-17 | Denso Corp | 電子装置 |
JP2017216420A (ja) | 2016-06-02 | 2017-12-07 | パナソニックIpマネジメント株式会社 | Ledモジュール、及び照明器具 |
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