JP6476419B2 - 素子チップの製造方法および素子チップ - Google Patents
素子チップの製造方法および素子チップ Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 34
- 230000001681 protective effect Effects 0.000 claims description 107
- 239000000758 substrate Substances 0.000 claims description 74
- 238000005530 etching Methods 0.000 claims description 64
- 238000000151 deposition Methods 0.000 claims description 24
- 230000008021 deposition Effects 0.000 claims description 20
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 11
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 7
- 238000009832 plasma treatment Methods 0.000 claims description 6
- 235000012431 wafers Nutrition 0.000 claims 2
- 239000007789 gas Substances 0.000 description 54
- 238000000034 method Methods 0.000 description 29
- 230000008569 process Effects 0.000 description 28
- 239000010410 layer Substances 0.000 description 21
- 238000001020 plasma etching Methods 0.000 description 14
- 238000004380 ashing Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 11
- 239000004020 conductor Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009623 Bosch process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- -1 C 4 F 8 Chemical compound 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Description
1a 第1の面
1b 第2の面
1c 分割領域
2 素子部
2a 素子領域
3 耐エッチング層
4 キャリア
10 素子チップ
10a 第1の面
10b 第2の面
10c 側面
12a,12b,12c 保護膜
E 凸部
Claims (8)
- 分割領域で画定された複数の素子領域を有する第1の面と前記第1の面と反対側の第2の面とを備える基板を、前記分割領域で分割して複数の素子チップを形成する素子チップの製造方法であって、
前記第1の面の側がキャリアに支持されるとともに、前記素子領域と対向する前記第2の面の領域を覆い且つ前記分割領域と対向する前記第2の面の領域を露出させるように耐エッチング層が形成された前記基板を準備する準備工程と、
前記準備工程の後、前記キャリアに支持された前記基板にプラズマ処理を施すプラズマ処理工程とを含み、
前記プラズマ処理工程は、
前記第2の面を第1のプラズマに晒すことにより、前記耐エッチング層に覆われていない領域の前記基板をこの基板の深さ方向に前記第1の面に達するまでエッチングして前記基板を素子チップに分割し、前記第1の面、前記第2の面および前記第1の面と前記第2の面とを結ぶとともに複数の凸部が形成された側面を備える素子チップが前記キャリア上に互いに間隔をあけて保持された状態とする分割工程と、
前記分割工程の後、前記キャリア上に互いに間隔をあけて保持された状態で前記素子チップを第2のプラズマに晒すことにより、前記素子チップの前記側面に保護膜を形成する保護膜形成工程とを含み、
前記保護膜形成工程において、前記保護膜は少なくとも前記凸部を被覆し、前記凸部を被覆する保護膜の膜厚が、隣り合う2つの前記凸部の中間における保護膜の膜厚よりも大きい、素子チップの製造方法。 - 分割領域で画定された複数の素子領域を有する第1の面と前記第1の面と反対側の第2の面とを備える基板を、前記分割領域で分割して複数の素子チップを形成する素子チップの製造方法であって、
前記第2の面の側がキャリアに支持されるとともに、前記素子領域を覆い且つ前記分割領域を露出させるように耐エッチング層が形成された前記基板を準備する準備工程と、
前記準備工程の後、前記キャリアに支持された前記基板にプラズマ処理を施すプラズマ処理工程とを含み、
前記プラズマ処理工程は、
前記第1の面を第1のプラズマに晒すことにより、前記耐エッチング層に覆われていない領域の前記基板をこの基板の深さ方向に前記第2の面に達するまでエッチングして前記基板を素子チップに分割し、前記第1の面、前記第2の面および前記第1の面と前記第2の面とを結ぶとともに複数の凸部が形成された側面を備える素子チップが前記キャリア上に互いに間隔をあけて保持された状態とする分割工程と、
前記分割工程の後、前記キャリア上に互いに間隔をあけて保持された状態で前記素子チップを第2のプラズマに晒すことにより、前記素子チップの前記側面に保護膜を形成する保護膜形成工程とを含み、
前記保護膜形成工程において、前記保護膜は少なくとも前記凸部を被覆し、前記凸部を被覆する保護膜の膜厚が、隣り合う2つの前記凸部の中間における保護膜の膜厚よりも大きい、素子チップの製造方法。 - 前記分割工程が、前記基板をエッチングするシリコンエッチングステップと前記シリコンエッチングステップによりエッチングされた部分の内壁に堆積膜を堆積させる堆積膜堆積ステップとを交互に繰り返す繰り返し工程を有し、
前記繰り返し工程において、前記側面に前記凸部が第1の面に沿って複数の線状に形成される、請求項1または2のいずれかに記載の素子チップの製造方法。 - 前記保護膜がフルオロカーボンを主成分とする膜である、請求項1から3のいずれかに記載の素子チップの製造方法。
- 前記第2のプラズマを生成するための保護膜形成用ガスがフッ化炭素を含む、請求項4に記載の素子チップの製造方法。
- 素子領域を有する第1の面と、前記第1の面と反対側の第2の面と、前記第1の面と前記第2の面とを結ぶ側面とを備える素子チップであって、
前記側面には複数の凸部が形成されており、前記側面の少なくとも前記凸部は保護膜で被覆されており、前記凸部を被覆する保護膜の膜厚が、隣り合う2つの前記凸部の中間における保護膜の膜厚よりも大きい、素子チップ。 - 前記凸部は、前記側面に前記第1の面に沿って複数の線状に形成されている、請求項6に記載の素子チップ。
- 前記保護膜がフルオロカーボンを主成分とする膜である、請求項6または7のいずれかに記載の素子チップ。
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