JP6004338B2 - 単結晶基板製造方法および内部改質層形成単結晶部材 - Google Patents
単結晶基板製造方法および内部改質層形成単結晶部材 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0005—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing
- B28D5/0011—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing with preliminary treatment, e.g. weakening by scoring
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
- B23K26/0613—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams having a common axis
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
- B23K26/0613—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams having a common axis
- B23K26/0617—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams having a common axis and with spots spaced along the common axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0665—Shaping the laser beam, e.g. by masks or multi-focusing by beam condensation on the workpiece, e.g. for focusing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/55—Working by transmitting the laser beam through or within the workpiece for creating voids inside the workpiece, e.g. for forming flow passages or flow patterns
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02532—Silicon, silicon germanium, germanium
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- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02656—Special treatments
- H01L21/02664—Aftertreatments
- H01L21/02667—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
- H01L21/02675—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams
- H01L21/02686—Pulsed laser beam
-
- 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
- H01L21/18—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 the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/268—Bombardment with radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F71/00—Manufacture or treatment of devices covered by this subclass
- H10F71/139—Manufacture or treatment of devices covered by this subclass using temporary substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
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- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Laser Beam Processing (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
まず、第1実施形態について説明する。図1は、本実施形態で、レーザ集光手段により空気中でレーザ光を集光したことを説明する模式的鳥瞰図であり、図2は、本実施形態で、レーザ集光手段により単結晶部材内部にレーザ光を集光したことを説明する模式的鳥瞰図である。図3は、本実施形態に係る単結晶基板製造方法および内部改質層形成単結晶部材11を説明する模式的断面構造である。図4は、レーザ光の照射により単結晶部材内部にクラック12cが形成されていることを示す模式的断面図である。図5は、内部改質層形成単結晶部材11の側壁に、レーザ光の集光によって形成された改質層12を露出させたことを示す模式的斜視断面図である。
集光レンズ15と単結晶部材10とを相対的に移動させて単結晶部材10内部に改質層12を形成する工程としては、例えば、単結晶部材10をXYステージ(図示せず)上に載置し、真空チャック、静電チャックなどでこの単結晶部材10を保持する。
この後、改質層12と単結晶層10uとの剥離を行う。本実施形態では、まず、内部改質層形成単結晶部材11の側壁に改質層12を露出させる。露出させるには、例えば、単結晶部10d、単結晶層10uの所定の結晶面に沿ってへき開する。この結果、図5に示すように、単結晶層10uと単結晶部10dとによって改質層12が挟まれた構造のものが得られる。なお、単結晶層10uの表面10tはレーザ光Bの被照射側の面である。
本発明者は、単結晶部材10として鏡面研磨した単結晶のシリコンウェハ10(厚み625μm)を準備した。そして、実施例1として、このシリコンウェハ10をXYステージに載置し、シリコンウェハ10のレーザ光の被照射側の表面10tからの0.34mmの距離に、第2レンズ18として第2平凸レンズ18を配置した。この第2平凸レンズ18は、曲率半径7.8mm、厚み3.8mm、屈折率1.58のレンズである。また、第1レンズ16としてNAが0.55の第1平凸レンズ16を配置した。
また、本発明者は、試験例1で用いたシリコンウェハ10と同様のシリコンウェハを用い、実施例1の実施条件で改質層12を形成してなる内部改質層形成単結晶部材11を製造した。そして、金属製基板28u、28dを用いて単結晶層10uを剥離し、単結晶基板10sを得た。この単結晶基板10sの剥離面10fをレーザ共焦点顕微鏡で観察したところ、図14に示す計測図が得られ、粒径50〜100μmの凹凸が剥離面10fに形成されていることが確認された。ここで、図14では、横軸が凹凸寸法(μm表示)であり、縦軸が表面粗さ(%表示)である。
次に、第2実施形態について説明する。図15は、本実施形態に係る単結晶基板製造方法および内部改質層形成単結晶部材を説明する上で用いる単結晶部材内部加工装置の模式的鳥瞰図である。
10u 単結晶層
10d 単結晶部
10s 単結晶基板
10t 表面
10b 表面
10f 剥離面
11 内部改質層形成単結晶部材
11u 界面
12 改質層
12p クラック部
15 集光レンズ
28u 金属製基板
29u 酸化層
B レーザ光
BC 照射軸
Claims (5)
- 単結晶部材上に非接触にレーザ集光手段を配置する工程と、
前記レーザ集光手段により、前記単結晶部材表面にレーザ光を照射して前記単結晶部材内部に前記レーザ光を集光するとともに、前記レーザ集光手段と前記単結晶部材とを相対的に移動させて、前記単結晶部材内部に、2次元状の改質層を形成する工程と、
前記単結晶部材側壁に前記改質層を露出させる工程と、
露出させた前記改質層をエッチングすることで前記改質層にエッチング溝を形成する工程と、
前記エッチング溝に楔状圧入材を圧入することにより、前記改質層により分断されてなる単結晶層を前記改質層との界面から剥離することで単結晶基板を形成する工程と
を有することを特徴とする単結晶基板製造方法。 - 前記改質層として、前記レーザ光の照射軸と平行なクラック部の集合体を形成することを特徴とする請求項1に記載の単結晶基板製造方法。
- 前記界面が、前記改質層の両面側のうち前記レーザ光の被照射側の界面であることを特徴とする請求項1に記載の単結晶基板製造方法。
- 前記剥離によって形成された剥離面が粗面であることを特徴とする請求項1に記載の単結晶基板製造方法。
- 前記単結晶基板を形成する工程では、表面に酸化層を有する金属製基板を前記単結晶層の表面に接着して剥離することを特徴とする請求項1に記載の単結晶基板製造方法。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/052941 WO2012108052A1 (ja) | 2011-02-10 | 2011-02-10 | 単結晶基板製造方法および内部改質層形成単結晶部材 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016168513A Division JP6202696B2 (ja) | 2016-08-30 | 2016-08-30 | 単結晶基板製造方法 |
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| Publication Number | Publication Date |
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| JPWO2012108052A1 JPWO2012108052A1 (ja) | 2014-07-03 |
| JP6004338B2 true JP6004338B2 (ja) | 2016-10-05 |
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| JP2012556739A Active JP6004338B2 (ja) | 2011-02-10 | 2011-02-10 | 単結晶基板製造方法および内部改質層形成単結晶部材 |
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| JP (1) | JP6004338B2 (ja) |
| CN (1) | CN103380482B (ja) |
| WO (1) | WO2012108052A1 (ja) |
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| JP3628108B2 (ja) * | 1996-06-10 | 2005-03-09 | 株式会社イオン工学研究所 | 太陽電池の製造方法 |
| JP3608333B2 (ja) * | 1997-03-06 | 2005-01-12 | ソニー株式会社 | 光学ピックアップ及び光学ピックアップ用対物レンズの組み立て方法 |
| DE10256247A1 (de) * | 2002-11-29 | 2004-06-09 | Andreas Jakob | Schichtverbund aus einer Trennschicht und einer Schutzschicht zum Schutze und zum Handling eines Wafers beim Dünnen, bei der Rückseitenbeschichtung und beim Vereinzeln |
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| CN201173997Y (zh) * | 2008-03-28 | 2008-12-31 | 深圳航天科技创新研究院 | 单芯片的眼镜式显示装置 |
| JP2010153590A (ja) * | 2008-12-25 | 2010-07-08 | Hamamatsu Photonics Kk | 切断用加工方法 |
| JP5456382B2 (ja) * | 2009-06-17 | 2014-03-26 | 信越ポリマー株式会社 | 半導体ウェーハの製造方法及びその装置 |
| JP5561666B2 (ja) * | 2009-09-07 | 2014-07-30 | 国立大学法人埼玉大学 | 基板スライス方法 |
| JP6004339B2 (ja) * | 2011-02-10 | 2016-10-05 | 信越ポリマー株式会社 | 内部応力層形成単結晶部材および単結晶基板製造方法 |
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