JP2015516114A - アルミニウム被覆銅リボン - Google Patents
アルミニウム被覆銅リボン Download PDFInfo
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- JP2015516114A JP2015516114A JP2015510800A JP2015510800A JP2015516114A JP 2015516114 A JP2015516114 A JP 2015516114A JP 2015510800 A JP2015510800 A JP 2015510800A JP 2015510800 A JP2015510800 A JP 2015510800A JP 2015516114 A JP2015516114 A JP 2015516114A
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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Abstract
Description
a. 表面を有する銅を含む第一の層、および
b. 前記第一の層の表面上に重ね合わせられた少なくとも1つの被覆層であって、アルミニウムを含む前記被覆層、および
c. 中間層
を含むリボンであって、リボンの断面図において、第一の層の面積の占める割合が、各々リボンの断面の総面積に対して50〜96%の範囲内、好ましくは60〜95%、または65〜92%、または70〜92%の範囲内であり、
断面図におけるリボンの幅と高さとの間のアスペクト比が0.03〜0.8未満、好ましくは0.03〜0.5、または0.1〜0.3の範囲内であり、
前記リボンが25000μm2〜800000μm2、好ましくは100000μm2〜600000μm2の範囲内の断面積を有し、
前記中間層(7)が第一の層(2)と被覆層(3)との間に配置され、前記中間層(7)が、第一の層(2)の材料と被覆層(3)の材料とを含む少なくとも1つの金属間化合物相を含む、前記リボンである。
a. 表面を有する銅コアと、前記銅コアの表面上に重ね合わせられた被覆層とを含むワイヤプリフォームを準備する段階であって、
前記被覆層がアルミニウムを含み、
前記ワイヤプリフォームの断面図において、銅コアの面積の占める割合は、各々ワイヤプリフォームの断面の総面積に対して50〜90%、好ましくは60〜100%、または70〜95%の範囲内であり、且つ
断面図において前記ワイヤプリフォームを通じた最長のパスと最短のパスとの間のアスペクト比が0.8超〜1.0、好ましくは0.9〜1.0の範囲内であり、
前記ワイヤプリフォームは0.5〜5mm、好ましくは0.75〜3mm、または0.75〜2mmの範囲内の直径を有する、前記段階
b. 前記ワイヤプリフォームを成形する段階であって、リボンプリフォームが得られる、前記段階
c. 成形されたリボンプリフォームをアニールする段階であって、中間層(7)が形成され、次いでリボンが得られる、前記段階
を含む、前記方法である。
A) 少なくとも99.9%の純度の銅を含む第一のシートを準備する段階、
B) 99.9%の純度のアルミニウムを含む少なくとも1つのさらなるシートを準備する段階であって、
第一のシートおよび少なくとも1つのさらなるシートの断面図において、第一のシートの断面積対少なくとも1つのさらなるシートの断面積の比は、1:1〜4:1、好ましくは1.2:1〜3.8:1の範囲内である、前記段階、
C) 段階aおよびbにおいて準備されたシートを重ね合わせ、シートを結合してリボンプリフォームを得て、そのリボンプリフォームを成形する段階、
D) 成形され且つ結合されたシートをアニールする段階であって、中間層が形成され、次いでリボンが得られる、前記段階
を含む前記製造方法である。
a. 本発明によるリボンについての散逸仕事が、純粋なAl製のリファレンス用リボンについての散逸仕事よりも少なくとも2倍高い、
b. 本発明によるリボンについての一軸サイクリング試験における最大歪みが、純粋なAl製のリファレンス用リボンについての最大歪みよりも少なくとも1.5倍高い、
c. 本発明によるリボンについてのパワーサイクリング試験が、純粋なAl製のリファレンス用リボンについてのものよりも少なくとも3倍高い、
d. 本発明によるリボンのプルが、純粋なAl製のリファレンス用リボンについてのものよりも少なくとも10%高い、
e. 本発明によるリボンのボンドシェアが、純粋なAl製のリファレンス用リボンと同等の高さである、
f. 本発明によるリボンの導電率が、純粋なAl製のリファレンス用リボンの導電率よりも20%〜55%の範囲内で高い。
a. 少なくとも2つの構成要素を準備する段階、
b. 2つの構成要素を上述のリボンによって接続する段階であって、前記接続の少なくとも1つはウェッジボンディングによって実施される前記段階
を含む前記製造方法である。
全ての試験および測定は、T=20℃、および相対湿度50%で行われた。一般に、リボンについて記載された全ての試験を、ワイヤを使用する同様の方式で実施できる。
試験試料、即ち長さ1.0メートルのリボンの両端を、定電流I=10mAを供給する電源に接続した。電圧を測定するための装置を用いて電圧を記録した。この構成を少なくとも4つの試験試料について繰り返した。以下に示す計算のために、4つの測定の算術平均を使用した。
被覆層の厚さ、中間層の厚さ、およびコアの直径を測定するために、リボンの最も長い方向に対して垂直にリボンを切断した。柔らかい材料、例えばAlのスミアリングを避けるために、切断部を注意深く研削し、且つ、研磨した。光学顕微鏡または走査型電子顕微鏡(SEM)によって写真を撮影し、その際、ワイヤの断面の全体が示されるように倍率を選択した。
AlSi1でめっきされたCuSn6製基板(Heraeus/ドイツから入手可能)へのリボンのボンディングを20℃で実施し、その際、ボンディングをAlSi1表面に適用した。リボンは常に、アルミニウム被覆層で被覆されたリボンの側の上にウェッジボンディングされる。リボンがアルミニウム層で被覆された1より多い面を有する場合、ウェッジボンディングは同じ面で、即ち、同じアルミニウム層の上で実施される。ウェッジボンディングは常に平坦な表面上でリボンに適用される。リボンと基板との間に45°の角度で第一のウェッジボンディング部を形成した後、第二の端部でリボンを基板にウェッジボンディングする。リボンの2つの端部の間のボンディング部の距離は、5〜20mmの範囲内であった。この距離はリボンと基板との間の角度が45°であることを確実にするために選択された。ウェッジボンディングの間、60〜120kHzの範囲の周波数の超音波を、90〜500ミリ秒の間、ボンディング器具に適用した。同一のウェッジボンディング条件を試験されるべき全てのリボンに適用した。
プル試験を、MIL−STD−883G Method 2011.7 (1989)、Condition Dに準拠し、XYZTEC Condor 150機において行った。この標準に対して、リボンが使用された点において異なり、前記リボンをAlSi1でめっきされたCuSn6製アルミニウム基板(Heraeus/ドイツから入手可能)上にアルミニウム被覆された平坦な表面上で角度45°でウェッジボンディングし、その際、ボンディングをAlSi1表面に適用した。リボンの2つの端部の間のボンディング部の距離は、5〜20mmの範囲内であった。この距離はリボンと基板との間の角度が45°であることを確実にするために選択された。ループを、引張速度2500μm/sで、ループの中央で引っ張った。使用されたプルフックはXYZTec TOR051200であった。
ボンドシェア試験を、AEC−Q101−003 Rev−A (07.2005)に準拠し、XYZTEC Condor 150機において実施した。この標準に対して、リボンが使用された点において異なり、前記リボンをAlSi1でめっきされたCuSn6製アルミニウム基板(Heraeus/ドイツから入手可能)上にアルミニウム被覆された平坦な表面上で角度45°でウェッジボンディングし、その際、ボンディングをAlSi1表面に適用した。ウェッジボンディングの広い側、即ち、リボンの端部を剪断して、シェア試験を実施した。その後、シェア器具を速度50μm/sで基板まで下げて、高さがゼロであるところを定義した。次に、剪断器具を基板表面から35μm後退させた。その後、剪断を速度250μm/sで行った。ボンディングのせん断破壊モードも記録した: (1)ボンディングのリフト、(2)ボンディングの剪断、(3)へこみ、(4)ボンディング表面のリフト(下にある基板からのボンディング表面の分離)。
直線のリボンの試料を機械にはさみ、機械的歪みを与えた(引張および圧縮)。機械的試験に供されるリボンの長さは1.0mmである。試料のサイクリングを歪み速度1%/sで、試料が破壊される(ワイヤが破損する)まで実施した。該機械は試料によって伝達される力を記録した。塑性歪み振幅(Δεp1)および散逸仕事(Δw)を各々、破壊までのサイクル数(N)に対してプロットする。
ダイオードEMCON 4 High Power Chip (available from INFINEON Technologies AG、Munich、ドイツから入手可能)を、試験すべきリボンを使用して台板にウェッジボンディングすることによって試料を製造した。上述のとおり、ウェッジボンディングのパラメータを、リボンと台板との間で、結合されたリボンの全てが同じ接触面積(Ac ref)を確実に示すように、適切に選択した。市販の台板の中で、試験の間、ダイ装着物(ダイオード)を保持する台板を選択した。全ての試料を同一の台板を使用して製造した。
上述のウェッジ−ウェッジボンディング手順によって同一の条件下で作製した250の試料のセットを、電気的欠陥に関して評価した。各々の試料は2つのボンディング部を有し、ボンディング部は合計500個になる。欠陥の数に依存して、各々のセットを表2における++、+、0、−または−−でランク付けする。
+ =< 2%
0 = 2〜5%
− = 5〜10%
−− => 10%。
この試験を、Zwick Z250試験機において、DIN EN ISO 6892−1 :2009、手順Aに準拠して、以下のパラメータを用いて行った: 初期ゲージ長 L0=100mm; 試験条件: 温度=20℃。Rp0.2まで、歪み速度は1mm/分であった。Rp0.2を超えたら、試料を歪み速度10mm/分で破壊するまで引っ張った。引張強度は、最大の力Fmを試料の初期の断面S0で割ることによって得られた。延びはΔL/L0に等しく、ここで、ΔLはゲージ長の変化である。
本発明を実施例によってさらに説明する。これらの例は、本発明を例示的に説明するために提供され、且つ、本発明の範囲および特許請求の範囲をいかようにも限定するものではない。
アルミニウム被覆の厚さ115μmおよび銅コアの直径770μmを有し、全体で直径1mmのワイヤを、各々、12%の延伸をもたらす3つの引き抜きダイを使用して引き延ばし、直径700μmのワイヤを得た。その後、ワイヤを圧延して、所望の厚さのリボンをもたらした。その後、リボンを炉内で1時間、表1に詳述されるアニール温度Tでアニールした。アニール後、リボンを24時間のうちに周囲温度に冷却した。それらのリボンの特性を表1にまとめる。
リボンを例1〜4のとおりに製造した。しかしながら、銅コアは840μmの直径および80μmのアルミニウム被覆を有した。全体のワイヤの直径は1mmであった。
それらのリボンを例1〜4のとおりに製造した。しかしながら、C1の銅コアは220μmの直径および390μmのアルミニウム被覆を有した。C2の銅コアは975μmの直径および12.5μmのアルミニウム被覆を有した。
例9〜12によるリボンを製造するために、厚さ700μmを有する純度99.9%の銅のシートを、厚さ220μmを有する純度99.9%のアルミニウムのシートと、2枚のシートの角が互いに揃うように合わせた。リボンプリフォームを得るために、合わせられたシートを圧延に供した。リボンプリフォームの厚さはロールに加えられる圧力に依存した。その後、リボンプリフォームを切断してリボンにし、長さ0.9mの管状炉内で、以下の表2に記載される温度およびアニール速度でアニールし、それによりリボンを得た。その後、リボンを24時間のうちに周囲温度に冷却した。例13〜16をそのように製造した。しかしながら、銅のシートは厚さ500μmを有し、アルミニウムのシートは厚さ220μmを有した。
(2) 第一の層
(2’) 銅コア
(2’’) 第一のシート
(3) 被覆層
(3’’) さらなるシート
(4) コンタクト
(5) リボンの幅
(5’) 断面図におけるワイヤプリフォームを通じた最長のパス
(6) リボンの高さ
(6’) 断面図におけるワイヤプリフォームを通じた最短のパス
(7) 中間層
(8) リボンの境界線
(9) ワイヤプリフォーム
(9’) リボンプリフォーム
(10) 電気装置
(11) 構成要素
(12) 電子素子
(13) 制御される素子
(14) 制御ユニット
(15) 第一の層の表面
(15’) 銅コアの表面
(16) 推進される装置
(17) プルフック
(18) プルフックの引張方向
(19) リボンと表面との間の角度
(20) 基板
(21) リボンと基板との間のボンディング部
(22) ワイヤを引っ張るプルフック下のリボンの角度
(23) ワイヤの中心
(24) リボンの中心
(25) リボンの境界線
(26) 管状炉
(L) ライン
(R1) 平行四辺形
A) 少なくとも99.9%の純度の銅を含む第一のシートを準備する段階、
B) 99.9%の純度のアルミニウムを含む少なくとも1つのさらなるシートを準備する段階であって、
第一のシートおよび少なくとも1つのさらなるシートの断面図において、第一のシートの断面積対少なくとも1つのさらなるシートの断面積の比は、1:1〜4:1、好ましくは1.2:1〜3.9:1の範囲内である、前記段階、
C) 段階aおよびbにおいて準備されたシートを重ね合わせ、シートを結合してリボンプリフォームを得て、そのリボンプリフォームを成形する段階、
D) 成形され且つ結合されたシートをアニールする段階であって、中間層が形成され、次いでリボンが得られる、前記段階
を含む前記製造方法である。
Claims (24)
- a. 表面(15)を有する銅を含む第一の層(2)、および
b. 前記第一の層(2)の表面(15)上に重ね合わせられた少なくとも1つの被覆層(3)であって、アルミニウムを含む前記被覆層(3)、および
c. 中間層(7)
を含むリボン(1)であって、リボン(1)の断面図において、第一の層(2)の面積の占める割合が、リボン(1)の断面の総面積に対して50〜96%の範囲内であり、且つ
断面図におけるリボン(1)の幅(5)と高さ(6)との間のアスペクト比が0.03〜0.8未満の範囲内であり、
前記リボン(1)が25000μm2〜800000μm2の範囲内の断面積を有し、
前記中間層(7)が第一の層(2)と被覆層(3)との間に配置され、前記中間層(7)が、第一の層(2)の材料と被覆層(3)の材料とを含む少なくとも1つの金属間化合物相を含む、前記リボン。 - リボン(1)の断面図での中間層(7)の面積の占める割合が、リボン(1)の断面の総面積に対して0.1〜15%の範囲内である、請求項1に記載のリボン(1)。
- 中間層(7)の厚さが0.1〜5μmの範囲内である、請求項1または2に記載のリボン(1)。
- リボン(1)の断面図での被覆層(3)の面積の占める割合が、リボン(1)の断面の総面積に対して3.9〜50%の範囲内である、請求項1から3までのいずれか1項に記載のリボン(1)。
- 第一の層(2)の厚さが、リボン(1)の断面図で測定して25〜380μmの範囲内である、請求項1から4までのいずれか1項に記載のリボン(1)。
- 被覆層(3)の厚さが、リボン(1)の断面図で測定して10〜70μmの範囲内である、請求項1から5までのいずれか1項に記載のリボン(1)。
- 第一の層(2)が、少なくとも99.9%の純度の銅を、前記第一の層(2)の総質量に対して少なくとも95質量%含む、請求項1から6までのいずれか1項に記載のリボン(1)。
- 第一の層内の銅の酸素含有率が、0.1〜80ppmの範囲内である、請求項1から7までのいずれか1項に記載のリボン(1)。
- 被覆層(3)が、99.9%の純度のアルミニウムを、前記被覆層(3)の総質量に対して少なくとも80質量%含む、請求項1から8までのいずれか1項に記載のリボン(1)。
- リボン(1)についての散逸仕事が、純粋なAl製のリファレンス用リボンについての散逸仕事より少なくとも2倍高い、請求項1から9までのいずれか1項に記載のリボン(1)。
- リボン(1)についての一軸サイクリング試験における最大歪みが、純粋なAl製のリファレンス用リボンについての最大歪みより少なくとも1.5倍高い、請求項1から10までのいずれか1項に記載のリボン(1)。
- リボン(1)についてのパワーサイクリング寿命試験が、純粋なAl製のリファレンス用リボンについてのものよりも少なくとも3倍高い、請求項1から11までのいずれか1項に記載のリボン(1)。
- リボン(1)についてのプルが、純粋なAl製のリファレンス用リボンについてのものよりも少なくとも10%高い、請求項1から12までのいずれか1項に記載のリボン(1)。
- リボン(1)の製造方法であって、少なくとも以下の段階:
a. 表面(15’)を有する銅コア(2’)と、前記銅コア(2’)の表面(15’)上に重ね合わせられた被覆層(3)とを含むワイヤプリフォーム(9)を準備する段階であって、
前記被覆層(3)はアルミニウムを含み、
前記ワイヤプリフォーム(9)の断面図において、銅コア(2’)の面積の占める割合は、ワイヤプリフォーム(9)の断面の総面積に対して50〜90%の範囲内であり、且つ
断面図において前記ワイヤプリフォーム(9)を通じた最長のパス(5’)と最短のパス(6’)との間のアスペクト比が0.8超〜1.0の範囲内であり、
前記ワイヤプリフォーム(9)は0.5〜5mmの範囲内の直径を有する、前記段階、
b. 前記ワイヤプリフォーム(9)を成形する段階であって、リボンプリフォーム(9’)が得られる、前記段階、
c. 成形されたリボンプリフォーム(9’)をアニールする段階であって、中間層(7)が形成され、次いでリボン(1)が得られる、前記段階
を含む前記製造方法。 - リボン(1)の製造方法であって、少なくとも以下の段階:
A) 少なくとも99.9%の純度の銅を含む第一のシート(2’’)を準備する段階、
B) 99.9%の純度のアルミニウムを含む少なくとも1つのさらなるシート(3’’)を準備する段階であって、
第一のシート(2’’)および少なくとも1つのさらなるシート(3’’)の断面図において、第一のシート(2’’)の断面積対少なくとも1つのさらなるシート(3’’)の断面積の比は、1:1〜4:1、好ましくは1.2:1〜3.9:1の範囲内である、前記段階
C) 段階aおよびbにおいて準備されたシート(2’’)および(3’’)を重ね合わせ、シート(2’’)および(3’’)を結合してリボンプリフォーム(9’)を得て、そのリボンプリフォーム(9’)を成形して、成形されたリボンプリフォーム(9’)を得る段階、
D) 成形されたリボンプリフォーム(9’)をアニールする段階であって、中間層(7)が形成され、次いでリボン(1)が得られる、前記段階
を含む前記製造方法。 - アニールを、140℃〜400℃の範囲の温度で、30分〜5時間の時間にわたって実施する、請求項14または15に記載の方法。
- アニールを、管状炉(26)内で150℃〜600℃の範囲の温度で、好ましくは1〜20メートル/分の範囲内の引き抜き速度で実施する、請求項14または15に記載の方法。
- 請求項14から17までのいずれか1項に記載の方法によって得られるリボン(1)。
- リボン(1)が、
a. リボン(1)についての散逸仕事が、純粋なAl製のリファレンス用リボンについての散逸仕事よりも少なくとも2倍高い、
b. リボン(1)についての一軸サイクリング試験における最大歪みが、純粋なAl製のリファレンス用リボンについての最大歪みよりも少なくとも1.5倍高い、
c. リボン(1)についてのパワーサイクリング寿命試験が、純粋なAl製のリファレンス用リボンについてのものよりも少なくとも3倍高い、
d. リボン(1)についてのリボン(1)のプルが、純粋なAl製のリファレンス用リボンについてのものよりも少なくとも10%高い、
e. リボン(1)の導電率が、純粋なAl製のリファレンス用リボンの導電率よりも20%〜55%の範囲内で高い
という特徴の少なくとも1つによって特徴付けられる、請求項18に記載のリボン(1)。 - 少なくとも2つの構成要素(11)と、請求項1から13または請求項18および請求項19のいずれか1項に記載の少なくとも1つのリボン(1)または請求項14から17までのいずれか1項に記載される方法によって製造された少なくとも1つのリボン(1)とを含み、リボン(1)が2つの構成要素(11)を電気的に接続している電気装置(10)。
- 電気的接続がウェッジボンディングによって得られる、請求項20に記載の電気装置(10)。
- 構成要素(11)の少なくとも1つが、基板、IGBT、集積回路、トランジスタ、ダイオード、例えば発光ダイオードまたはフォトダイオードからなる群から選択される、請求項20または21に記載の電気装置(10)。
- 請求項20から22までのいずれか1項に記載の少なくとも1つの電気装置(10)を含む推進装置(16)。
- 電気装置(10)の製造方法であって、以下の段階:
a. 少なくとも2つの構成要素(11)を準備する段階、
b. 前記少なくとも2つの構成要素(11)を、請求項1から13または請求項18および請求項19のいずれか1項に記載のリボン(1)、または請求項14から17までのいずれか1項に記載の方法によって製造されたリボン(1)を通じて接続する段階であって、前記接続の少なくとも1つがウェッジボンディングによって行われる、前記段階
を含む、前記製造方法。
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EP20120003603 EP2662889A1 (en) | 2012-05-07 | 2012-05-07 | Aluminium coated copper ribbon |
EP12003603.3 | 2012-05-07 | ||
PCT/EP2013/059528 WO2013167614A1 (en) | 2012-05-07 | 2013-05-07 | Aluminium coated copper ribbon |
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JP (1) | JP6211065B2 (ja) |
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DE102014223352A1 (de) * | 2014-11-17 | 2016-05-19 | Robert Bosch Gmbh | Verbindungsanordnung mit einem mehrschichtigen Bondflachdraht |
USD775407S1 (en) * | 2015-02-27 | 2016-12-27 | Star Headlight & Lantern Co., Inc. | Optical lens for projecting light from LED light emitters |
TWI735612B (zh) * | 2017-07-06 | 2021-08-11 | 大陸商深圳市為什新材料科技有限公司 | 可攜帶電子裝置之殼體轉印散熱塗層結構 |
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PH12014502389A1 (en) | 2014-12-22 |
CN104285287A (zh) | 2015-01-14 |
US20150137390A1 (en) | 2015-05-21 |
EP2662889A1 (en) | 2013-11-13 |
JP6211065B2 (ja) | 2017-10-11 |
KR20150013715A (ko) | 2015-02-05 |
US9214444B2 (en) | 2015-12-15 |
EP3557609A1 (en) | 2019-10-23 |
WO2013167614A1 (en) | 2013-11-14 |
CN104285287B (zh) | 2018-05-29 |
SG11201406454UA (en) | 2014-11-27 |
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