JP6004100B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 115
- 238000004519 manufacturing process Methods 0.000 title claims description 61
- 239000000758 substrate Substances 0.000 claims description 148
- 239000012790 adhesive layer Substances 0.000 claims description 132
- 230000002093 peripheral effect Effects 0.000 claims description 72
- 238000000034 method Methods 0.000 claims description 66
- 238000000227 grinding Methods 0.000 claims description 3
- 235000012431 wafers Nutrition 0.000 description 196
- 239000011521 glass Substances 0.000 description 94
- 239000010410 layer Substances 0.000 description 26
- 239000000853 adhesive Substances 0.000 description 24
- 230000001070 adhesive effect Effects 0.000 description 24
- 238000000926 separation method Methods 0.000 description 11
- 238000005336 cracking Methods 0.000 description 5
- 230000001678 irradiating effect Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000004380 ashing Methods 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- 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
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- 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
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- B32B38/00—Ancillary operations in connection with laminating processes
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- B32B2038/0016—Abrading
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/08—Glass
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
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- B32B38/00—Ancillary operations in connection with laminating processes
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- H01L2221/6834—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used to protect an active side of a device or wafer
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Description
実施の形態1にかかる半導体装置の製造方法について説明する。図1は、実施の形態1にかかる半導体装置の製造方法の概要を示すフローチャートである。図2〜5は、図1に示すフローチャートにおける製造途中の状態を示す断面図である。まず、一般的なウエハ1のおもて面側工程を行い、ウエハ1のおもて面(第1主面)1c側に図示省略するおもて面素子構造を形成する(ステップS1)。次に、塗布機(コーター)を用いて、ウエハ1のおもて面1c全体に接着剤2を塗布する(ステップS2)。ステップS2では、例えば、ステージ上に固定されたウエハ1を高速回転させ、ウエハ1のおもて面1c上に滴下された接着剤2を遠心力によって伸ばすスピン方式を用いる。
次に、実施の形態2にかかる半導体装置の製造方法について説明する。図6は、実施の形態2にかかる半導体装置の製造方法の概要を示すフローチャートである。図7〜9は、図6に示すフローチャートにおける製造途中の状態を示す断面図である。実施の形態2にかかる半導体装置の製造方法が実施の形態1にかかる半導体装置の製造方法と異なる点は、ステップS5とステップS6との間に、接着層22の余分な部分を除去する工程(ステップS21)を追加した点である。すなわち、実施の形態2においては、ウエハ1とガラス基板3とを貼り合わせて、接着層22の外周部の突出する部分によってガラス基板3の面取り部3bおよび側面3aまで覆われた場合に、接着層22の余分な部分を除去する。
次に、実施の形態3にかかる半導体装置の製造方法について説明する。図11は、実施の形態3にかかる半導体装置の製造方法の概要を示すフローチャートである。図12,13は、図11に示すフローチャートにおける製造途中の状態を示す断面図である。実施の形態3にかかる半導体装置の製造方法が実施の形態1にかかる半導体装置の製造方法と異なる点は、ステップS6とステップS7との間に、接着層32の余分な部分を除去する工程(ステップS31)を追加した点である。すなわち、実施の形態3においても、実施の形態2と同様に、ウエハ1とガラス基板3とを貼り合わせて、接着層32の外周部の突出する部分によってガラス基板3の面取り部3bおよび側面3aまで覆われた場合に、接着層32の余分な部分を除去する。
1a ウエハの側面
1b ウエハの面取り部
1c ウエハのおもて面
1d ウエハの裏面
1e ウエハの外周端部の尖った部分
2,22,32 接着剤、接着層
2a 接着剤の外周端部
2b,22b−1〜22b−3,32b 接着層の外周端部
3 ガラス基板
3a ガラス基板の側面
3b ガラス基板の面取り部
3c ガラス基板の第1の面
3d ガラス基板の第2の面
11 ダイシングフレーム
12 ダイシングテープ
13 レーザー光
40a おもて面素子構造
40b 裏面素子構造
41 n-半導体基板
42 pベース領域
43 n+エミッタ領域
44 ゲート絶縁膜
45 ゲート電極
46 エミッタ電極
47 層間絶縁膜
48 pコレクタ層
49 コレクタ電極
50 nフィールドストップ層
Claims (5)
- 半導体ウエハの第1主面に、外周部側が中央部側よりも突出するように接着層を形成する接着層形成工程と、
前記接着層によって前記半導体ウエハの側面まで覆われるように、前記接着層を介して前記半導体ウエハの第1主面に支持基板を貼り合わせる貼り合わせ工程と、
を含み、
前記支持基板は、前記半導体ウエハの第1主面に対向する面と側面との角部が面取りされており、
前記貼り合わせ工程では、前記接着層によって前記支持基板の前記面取りされた部分よりも内側が覆われることを特徴とする半導体装置の製造方法。 - 前記半導体ウエハは、前記半導体ウエハの第1主面と側面との角部が面取りされており、
前記支持基板に貼り合わされた状態で、前記半導体ウエハの前記面取りされた部分に達するまで前記半導体ウエハの第2主面を研削し、前記半導体ウエハの厚さを薄くする薄化工程をさらに含み、
前記貼り合わせ工程では、前記薄化工程後の前記半導体ウエハの前記面取りされた部分全面に前記接着層が残るように、前記半導体ウエハの側面を覆う前記接着層を拡げることを特徴とする請求項1に記載の半導体装置の製造方法。 - 半導体ウエハの第1主面に、外周部側が中央部側よりも突出するように接着層を形成する接着層形成工程と、
前記接着層によって前記半導体ウエハの側面まで覆われるように、前記接着層を介して前記半導体ウエハの第1主面に支持基板を貼り合わせる貼り合わせ工程と、
を含み、
前記支持基板は、前記半導体ウエハの第1主面に対向する面と側面との角部が面取りされており、
前記貼り合わせ工程後、前記支持基板の前記面取りされた部分から外側の部分を覆う前記接着層を除去する除去工程をさらに含むことを特徴とする半導体装置の製造方法。 - 前記半導体ウエハは、前記半導体ウエハの第1主面と側面との角部が面取りされており、
前記支持基板に貼り合わされた状態で、前記半導体ウエハの前記面取りされた部分に達するまで前記半導体ウエハの第2主面を研削し、前記半導体ウエハの厚さを薄くする薄化工程をさらに含み、
前記除去工程では、前記薄化工程によって厚さが薄くなった前記半導体ウエハの第1主面から前記面取りされた部分までを覆う前記接着層が残るように、前記接着層を除去することを特徴とする請求項3に記載の半導体装置の製造方法。 - 前記除去工程前に、前記薄化工程によって厚さが薄くなった前記半導体ウエハの第2主面に素子構造を形成する素子構造形成工程をさらに含み、
前記除去工程では、前記接着層の外周位置が前記半導体ウエハの外周位置よりも外側に位置するように、前記支持基板と前記接着層との接着面積を低減することを特徴とする請求項4に記載の半導体装置の製造方法。
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