WO2014030604A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- WO2014030604A1 WO2014030604A1 PCT/JP2013/072067 JP2013072067W WO2014030604A1 WO 2014030604 A1 WO2014030604 A1 WO 2014030604A1 JP 2013072067 W JP2013072067 W JP 2013072067W WO 2014030604 A1 WO2014030604 A1 WO 2014030604A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- memory cell
- cell array
- guard ring
- semiconductor device
- word lines
- Prior art date
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 40
- 239000002184 metal Substances 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000003491 array Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005549 size reduction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/14—Word line organisation; Word line lay-out
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
- H01L29/0619—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE] with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/01—Manufacture or treatment
- H10B12/09—Manufacture or treatment with simultaneous manufacture of the peripheral circuit region and memory cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/48—Data lines or contacts therefor
- H10B12/488—Word lines
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/50—Peripheral circuit region structures
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/01—Manufacture or treatment
- H10B12/02—Manufacture or treatment for one transistor one-capacitor [1T-1C] memory cells
- H10B12/05—Making the transistor
- H10B12/053—Making the transistor the transistor being at least partially in a trench in the substrate
Definitions
- the present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2012-181799 (filed on August 20, 2012), the entire contents of which are incorporated herein by reference. Shall.
- the present invention relates to a semiconductor device.
- the present invention relates to a semiconductor device provided with a buried word line.
- a buried gate type transistor in which a gate electrode is buried in the surface layer of a semiconductor substrate may be employed as a selection transistor constituting a memory cell.
- the gate electrode of this buried gate type transistor is arranged as a word line used for selecting a memory cell.
- dummy word lines may be wired in addition to the word lines that actually control the memory cells. By wiring dummy word lines at regular intervals, the wiring density of the word lines is made constant.
- a guard ring for protecting the memory cell array from external noise may be provided around the memory cell array.
- Patent Document 1 discloses a technique in which a guard ring is three-dimensionally provided in order to block noise propagating to a circuit on a semiconductor substrate.
- Patent Document 2 discloses a power MOSFET in which a withstand voltage is improved by providing a plurality of guard ring regions.
- Patent Document 3 discloses a fuse device including a guard ring.
- JP 2008-235296 A Japanese Patent Laid-Open No. 08-306911 JP-A-11-017018
- dummy word lines may be wired in the memory cell array.
- the dummy word line need not be simply wired inside the memory cell array, but is preferably fixed at a constant potential in terms of circuit stability and noise resistance.
- the inventors examined the layout when wiring dummy word lines to the memory cell array, and bundled dummy word lines in the polymetal wiring layer in the boundary region between the memory cell array and the sub word driver adjacent to the memory cell array. Was devised.
- FIG. 2 is a diagram showing an example of the layout of the semiconductor device.
- FIG. 2 shows an example of wiring that bundles the dummy word lines in the dummy word line connection region 12 that is a boundary region between the memory cell array 10 and the sub word driver 11.
- a memory cell array 10 shown in FIG. 2 includes a memory cell region 13 composed of a plurality of memory cells.
- the memory cell region 13 and the sub word driver 11 are connected via a plurality of embedded word lines 14.
- the buried word line 14 the gate electrode of the buried transistor
- the metal wiring 15 are connected via the contact 16.
- the dummy word line 17 is connected to the polymetal wiring layer 18 through the metal wiring 15a and the contacts 16a and 16b.
- the dummy word lines 17 are wired every five embedded word lines 14.
- the dummy word lines 17 are bundled at the boundary region between the memory cell array 10 and the sub word driver 11, it is necessary to provide a dummy word line connection region 12 that was not originally necessary. As a result, the boundary region between the memory cell array 10 and the sub word driver 11 is enlarged, which is against the desire to reduce the chip size of the semiconductor device. Therefore, a semiconductor device that reduces the chip size while fixing the potential of the dummy word line is desired.
- a plurality of memory cells a plurality of word lines for controlling the storage operation of the plurality of memory cells, and a plurality of dummy word lines that do not contribute to the storage operation of the plurality of memory cells
- a guard ring surrounding the memory cell array, wherein the plurality of dummy word lines are electrically fixed to the guard ring.
- a semiconductor device that reduces the chip size while fixing the potential of the dummy word line.
- FIG. 1 is a diagram illustrating an example of an overall configuration of a semiconductor device 1 according to a first embodiment.
- FIG. 4 is a diagram illustrating an example of a layout of a memory cell array region 31 illustrated in FIG. 3. It is an enlarged view of the area
- FIG. 6 is an enlarged view of a region surrounded by a dotted line in FIG. 5.
- the semiconductor device shown in FIG. 1 is provided as an example. 1 includes a plurality of memory cells, a plurality of word lines that control storage operations of the plurality of memory cells, and a plurality of dummy word lines that do not contribute to the storage operations of the plurality of memory cells.
- a cell array 100 and a guard ring 200 surrounding the memory cell array 100 are provided, and the plurality of dummy word lines are electrically fixed to the guard ring 200.
- the potential of the dummy word line is set to the same potential as the guard ring 200.
- the wiring for supplying the potential of the dummy word line is not required at the boundary portion between the memory cell array 100 and the sub word driver (not shown in FIG. 1), and the area of the boundary portion is reduced. Contributes to size reduction.
- the guard ring 200 surrounding the memory cell array 100 is a state in which the guard ring 200 includes the memory cell array 100 (a state shown in FIG. 1) or a state in which a part of the memory cell array 100 is in contact with the outside of the guard ring 200. (A state in which a part of the guard ring 200 is missing).
- the plurality of word lines and the plurality of dummy word lines are arranged as gate electrodes of a buried gate type transistor formed on a semiconductor substrate.
- the guard ring is formed of a diffusion layer surrounding the memory cell array.
- the guard ring is preferably a wiring guard ring that surrounds the periphery of the memory cell array with metal wiring.
- FIG. 3 is a diagram illustrating an example of the overall configuration of the semiconductor device 1 according to the present embodiment.
- the semiconductor device 1 includes a command terminal (/ RAS, / CAS, / WE), a reset terminal (/ RST), an address terminal ADD, a power supply terminal (VDD, VSS), and a clock terminal (CK, / CK). And terminals such as a data terminal DQ.
- the semiconductor device 1 shown in FIG. 3 includes an internal power generation circuit 21, a clock input circuit 22, a DLL circuit 23, a command input circuit 24, a command decode circuit 25, an address input circuit 26, and an address latch circuit 27. , A FIFO circuit 28, an input / output buffer 29, and an array region 30.
- the internal power generation circuit 21 generates a voltage used inside the semiconductor device 1.
- the clock input circuit 22 receives a differential clock (CK, / CK) and outputs a single-phase clock CLKIN.
- the DLL circuit 23 generates the internal clock LCLK by delaying the single-phase clock CLKIN.
- a command for the semiconductor device 1 is received by the command input circuit 24 via a command terminal. Specifically, a command composed of a row address strobe signal / RAS, a column address strobe signal / CAS, a write enable signal / WE, and the like is input. A command constituted by these signals is decoded by the command decoding circuit 25, and the decoding result is output to the array area 30.
- the address signal issued from the outside is received by the address input circuit 26 and latched by the address latch circuit 27.
- the address signal is supplied to the column decoder 32 and the row decoder 33 in the array region 30.
- the array region 30 includes a memory cell array region 31, a column decoder 32, and a row decoder 33.
- the memory cell array region 31 includes a plurality of memory cell arrays arranged in a matrix.
- the column decoder 32 decodes a column address in the address signal and selects a bit line of a memory cell to be accessed.
- the row decoder 33 decodes a row address in the address signal and selects a word line.
- the read data read from the selected memory cell is output from the data terminal DQ via the FIFO circuit 28 and the input / output buffer 29.
- the write data input to the data terminal DQ is written to the selected memory cell via the input / output buffer 29 and the FIFO circuit 28.
- the memory cell array region 31 includes a plurality of memory cell arrays and sub word drivers corresponding to the memory cell arrays.
- FIG. 4 is a diagram showing an example of the layout of the memory cell array region 31.
- a memory cell array is a collection of a plurality of memory cells in a predetermined number, and a sub word driver is connected to each memory cell array.
- FIG. 5 is an enlarged view of a region surrounded by a dotted line in FIG.
- the memory cell array 40 includes a plurality of embedded word lines (embedded subword lines). Each embedded word line is connected to sub word drivers 41 and 42 adjacent to the memory cell array 40. Further, dummy word lines are wired to the memory cell array 40 at regular intervals. In FIG. 5, dummy word lines are wired at a ratio of one dummy word line to five embedded word lines.
- the memory cell array 40 also includes a plurality of bit lines, which are not shown in FIG.
- the memory cell array 40 is surrounded by a guard ring 43.
- FIG. 6 is an enlarged view of a region surrounded by a dotted line in FIG.
- the embedded word line 44 shown in FIG. 6 is connected to the metal wiring 46 through the contact 45.
- the dummy word line 47 is connected to the guard ring 43 via the contact 48.
- FIG. 7 is a diagram showing an example of the AA cross section of FIG.
- a P well 51 is formed on the surface of a semiconductor substrate 50, and an N ⁇ diffusion layer 52 is further laminated.
- the P well 51 and the N ⁇ diffusion layer 52 constitute a guard ring 43 (diffusion layer guard ring).
- the guard ring 43 is partitioned by STI (shallow trench isolation) 53.
- transistor gate electrodes are arranged as buried word lines 44 in the P well 51 and the STI 53.
- the buried word line 44 is connected to the metal wiring 46 through the contact 45.
- FIG. 8 is a diagram showing an example of the BB cross section of FIG.
- the dummy word line 47 is connected to the P well 51 of the guard ring 43 through a contact 48.
- the potential of the dummy word line 47 connected to the P well 51 is fixed to the potential of the P well 51.
- the potential of the dummy word line can be fixed by connecting the dummy word line to the guard ring 43 (diffusion layer guard ring) disposed around the memory cell array via the contact 48. .
- FIG. 9 is a diagram showing an example of the AA cross section of FIG.
- FIG. 10 is a diagram showing an example of a BB cross section of FIG. 9 and 10, the same components as those in FIGS. 7 and 8 are denoted by the same reference numerals, and the description thereof is omitted.
- the dummy word line 47 is connected to the guard ring 43 (wiring guard ring) via the contact 48.
- the potential of the line 47 can be fixed.
- the embedded word line 44 is connected to the metal wiring 46 through the contact 45 as in FIG.
- the chip size of the semiconductor device 2 can be reduced by reducing the area of the boundary region between the memory cell array and the sub word driver.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Semiconductor Memories (AREA)
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Abstract
Description
本発明は、日本国特許出願:特願2012-181799号(2012年8月20日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、半導体装置に関する。特に、埋め込みワード線を備える半導体装置に関する。
第1の実施形態について、図面を用いてより詳細に説明する。
続いて、第2の実施形態について図面を参照して詳細に説明する。本実施形態に係る半導体装置2の全体構成等は、半導体装置1と相違する点はないので、半導体装置2についての図3~図6についての説明は省略する。半導体装置1と半導体装置2の相違点は、ガードリング43を拡散層ガードリングにより実現することに代えて、メモリセルアレイの周囲を金属配線で取り囲む配線ガードリングにより実現している点である。
10、40、100 メモリセルアレイ
11、41、42 サブワードドライバ
12 ダミーワード線接続領域
13 メモリセル領域
14、44 埋め込みワード線
15、15a、46 メタル配線
16、16a、16b、45、48 コンタクト
17、47 ダミーワード線
18 ポリメタル配線層
21 内部電源生成回路
22 クロック入力回路
23 DLL回路
24 コマンド入力回路
25 コマンドデコード回路
26 アドレス入力回路
27 アドレスラッチ回路
28 FIFO回路
29 入出力バッファ
30 アレイ領域
31 メモリセルアレイ領域
32 カラムデコーダ
33 ロウデコーダ
43、200 ガードリング
50 半導体基板
51 Pウェル
52 N-拡散層
53 STI
Claims (4)
- 複数のメモリセルと、前記複数のメモリセルの記憶動作を制御する複数のワード線と、前記複数のメモリセルの記憶動作に寄与しない複数のダミーワード線と、を含むメモリセルアレイと、
前記メモリセルアレイを取り囲むガードリングと、
を備え、
前記複数のダミーワード線は、前記ガードリングに電気的に固定されている半導体装置。 - 前記複数のワード線及び前記複数のダミーワード線は、半導体基板上に形成された埋め込みゲート型トランジスタのゲート電極として配設されている請求項1の半導体装置。
- 前記ガードリングは、前記メモリセルアレイを取り囲む拡散層により形成されている請求項1又は2の半導体装置。
- 前記ガードリングは、前記メモリセルアレイの周囲を金属配線で取り囲む配線ガードリングである請求項1又は2の半導体装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20157006085A KR20150046099A (ko) | 2012-08-20 | 2013-08-19 | 반도체 장치 |
US14/422,672 US9177962B2 (en) | 2012-08-20 | 2013-08-19 | Semiconductor device |
DE112013004102.2T DE112013004102B4 (de) | 2012-08-20 | 2013-08-19 | Halbleiterbauelement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-181799 | 2012-08-20 | ||
JP2012181799 | 2012-08-20 |
Publications (1)
Publication Number | Publication Date |
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WO2014030604A1 true WO2014030604A1 (ja) | 2014-02-27 |
Family
ID=50149913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/072067 WO2014030604A1 (ja) | 2012-08-20 | 2013-08-19 | 半導体装置 |
Country Status (4)
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US (1) | US9177962B2 (ja) |
KR (1) | KR20150046099A (ja) |
DE (1) | DE112013004102B4 (ja) |
WO (1) | WO2014030604A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016149409A (ja) * | 2015-02-10 | 2016-08-18 | マイクロン テクノロジー, インク. | 半導体装置 |
EP4002453A4 (en) * | 2020-05-28 | 2022-11-16 | Changxin Memory Technologies, Inc. | OUTLET STRUCTURE FOR WORD LINE AND PROCESS FOR THEIR PRODUCTION |
CN113745193B (zh) * | 2020-05-28 | 2023-12-12 | 长鑫存储技术有限公司 | 字线引出结构及其制备方法 |
KR20220053172A (ko) | 2020-10-22 | 2022-04-29 | 삼성전자주식회사 | 가변 저항 메모리 소자 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0964310A (ja) * | 1995-08-21 | 1997-03-07 | Hitachi Ltd | 半導体集積回路装置 |
JPH09102592A (ja) * | 1996-03-21 | 1997-04-15 | Hitachi Ltd | 半導体記憶装置 |
JP2002134506A (ja) * | 2000-10-19 | 2002-05-10 | Mitsubishi Electric Corp | 半導体装置 |
JP2005051044A (ja) * | 2003-07-29 | 2005-02-24 | Hitachi Ltd | 半導体集積回路装置 |
JP2008235296A (ja) * | 2007-03-16 | 2008-10-02 | Ricoh Co Ltd | 半導体集積回路装置 |
JP2011159760A (ja) * | 2010-01-29 | 2011-08-18 | Elpida Memory Inc | 半導体装置の製造方法及び半導体装置 |
JP2012043995A (ja) * | 2010-08-19 | 2012-03-01 | Elpida Memory Inc | 半導体装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08306911A (ja) | 1995-04-28 | 1996-11-22 | Sanyo Electric Co Ltd | 半導体装置とその製造方法 |
JPH1117018A (ja) | 1997-06-27 | 1999-01-22 | Hitachi Ltd | フューズ装置および半導体記憶装置 |
US8619352B2 (en) | 2003-07-29 | 2013-12-31 | Silicon Quest Kabushiki-Kaisha | Projection display system using laser light source |
KR20090065943A (ko) * | 2007-12-18 | 2009-06-23 | 삼성전자주식회사 | 반도체 메모리 장치 |
-
2013
- 2013-08-19 KR KR20157006085A patent/KR20150046099A/ko active IP Right Grant
- 2013-08-19 WO PCT/JP2013/072067 patent/WO2014030604A1/ja active Application Filing
- 2013-08-19 US US14/422,672 patent/US9177962B2/en active Active
- 2013-08-19 DE DE112013004102.2T patent/DE112013004102B4/de active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0964310A (ja) * | 1995-08-21 | 1997-03-07 | Hitachi Ltd | 半導体集積回路装置 |
JPH09102592A (ja) * | 1996-03-21 | 1997-04-15 | Hitachi Ltd | 半導体記憶装置 |
JP2002134506A (ja) * | 2000-10-19 | 2002-05-10 | Mitsubishi Electric Corp | 半導体装置 |
JP2005051044A (ja) * | 2003-07-29 | 2005-02-24 | Hitachi Ltd | 半導体集積回路装置 |
JP2008235296A (ja) * | 2007-03-16 | 2008-10-02 | Ricoh Co Ltd | 半導体集積回路装置 |
JP2011159760A (ja) * | 2010-01-29 | 2011-08-18 | Elpida Memory Inc | 半導体装置の製造方法及び半導体装置 |
JP2012043995A (ja) * | 2010-08-19 | 2012-03-01 | Elpida Memory Inc | 半導体装置 |
Also Published As
Publication number | Publication date |
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KR20150046099A (ko) | 2015-04-29 |
DE112013004102T5 (de) | 2015-05-07 |
DE112013004102B4 (de) | 2017-07-20 |
US9177962B2 (en) | 2015-11-03 |
US20150228658A1 (en) | 2015-08-13 |
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