JP2007186413A - ナノワイヤー製造方法 - Google Patents
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- 239000002070 nanowire Substances 0.000 title claims abstract description 323
- 238000004519 manufacturing process Methods 0.000 title abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 57
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000013078 crystal Substances 0.000 claims abstract description 37
- 239000004065 semiconductor Substances 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 62
- 239000002243 precursor Substances 0.000 claims description 14
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- 238000000038 ultrahigh vacuum chemical vapour deposition Methods 0.000 claims description 6
- 238000000059 patterning Methods 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 83
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000005530 etching Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002071 nanotube Substances 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229910021480 group 4 element Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Abstract
【解決手段】基板上に物質膜パターンを形成する段階と、基板上に前記物質膜パターンを覆う第1絶縁膜、第1ナノワイヤー形成層及び上部絶縁膜を順次に積層する段階と、物質膜パターンが露出されるまで上部絶縁膜、第1ナノワイヤー形成層及び第1絶縁膜を順次に研磨して第1ナノワイヤー形成層の一部を露出させる段階と、第1ナノワイヤー形成層の露出された領域に単結晶ナノワイヤーを形成する段階とを含むが、第1絶縁膜及び第1ナノワイヤー形成層の総厚さは、物質膜パターンの厚さより薄く形成することを特徴とするナノワイヤー製造方法。
【選択図】図12
Description
12 メサパターン
16、20 第1及び第2絶縁膜
18、22 第1及び第2ナノワイヤー形成層
24 上部絶縁膜
30 チャンバ
34 ソース物質
40 図3の結果物
60、 84 多結晶ナノワイヤー
62、 90 エキシマレーザ
64、 84a 単結晶ナノワイヤー
80 ナノワイヤー形成層
80a ナノワイヤー形成層パターン
82 絶縁膜
82a 絶縁膜パターン
100 感光膜パターン
M1、M2、 M3 第1ないし第3感光膜パターン
P1 積層物パターン
Claims (32)
- 基板上に物質膜パターンを形成する第1段階と、
前記基板上に前記物質膜パターンを覆う第1絶縁膜、第1ナノワイヤー形成層及び上部絶縁膜を順次に積層する第2段階と、
前記物質膜パターンが露出されるまで前記上部絶縁膜、前記第1ナノワイヤー形成層及び前記第1絶縁膜を順次に研磨して前記第1ナノワイヤー形成層の一部を露出させる第3段階と、
前記第1ナノワイヤー形成層の露出された領域に単結晶ナノワイヤーを形成する第4段階と、を含むが、
前記第1絶縁膜及び前記第1ナノワイヤー形成層を合わせた厚さは、前記物質膜パターンの厚さより薄く形成することを特徴とするナノワイヤーの形成方法。 - 前記基板は、シリコン酸化物、水晶またはガラスからなることを特徴とする請求項1に記載のナノワイヤーの形成方法。
- 前記第1絶縁膜は、前記単結晶ナノワイヤーの形成に使われるソースガスに対する反応率が前記第1ナノワイヤー形成層より低い物質で形成することを特徴とする請求項1に記載のナノワイヤーの形成方法。
- 前記第1ナノワイヤー形成層は、シリコンナイトライド層であることを特徴とする請求項1に記載のナノワイヤーの形成方法。
- 前記第2段階は、
前記第1ナノワイヤー形成層と前記上部絶縁膜との間に第2絶縁膜及び第2ナノワイヤー形成層を順次に形成する段階をさらに含み、
前記第1絶縁膜、前記第1ナノワイヤー形成層、前記第2絶縁膜及び前記第2ナノワイヤー形成層を合わせた厚さは、前記物質膜パターンの厚さより薄く形成することを特徴とする請求項1に記載のナノワイヤーの形成方法。 - 前記第2絶縁膜は、前記単結晶ナノワイヤー形成に使われるソースガスに対する反応率が前記第2ナノワイヤー形成層より低い物質からなることを特徴とする請求項5に記載のナノワイヤーの形成方法。
- 前記第2ナノワイヤー形成層は、シリコンナイトライド層からなることを特徴とする請求項5に記載のナノワイヤーの形成方法。
- 前記第1ナノワイヤー形成層は、1−100nmの厚さに形成することを特徴とする請求項1に記載のナノワイヤーの形成方法。
- 前記第2ナノワイヤー形成層は、1−100nmの厚さに形成することを特徴とする請求項5に記載のナノワイヤーの形成方法。
- 前記第1及び第2ナノワイヤー形成層は、相異なる厚さに形成することを特徴とする請求項5に記載のナノワイヤーの形成方法。
- 前記単結晶ナノワイヤーは、Siナノワイヤー、Geナノワイヤー及びSiGeナノワイヤーのうち、いずれか1つであることを特徴とする請求項1に記載のナノワイヤーの形成方法。
- 前記単結晶ナノワイヤーは、Siナノワイヤー、Geナノワイヤー及びSiGeナノワイヤーのうちいずれか1つであることを特徴とする請求項5に記載のナノワイヤーの形成方法。
- 前記第1ナノワイヤー形成層の露出された部分は、所定の長さとナノサイズの幅を有することを特徴とする請求項1に記載のナノワイヤーの形成方法。
- 前記第4段階は、
前記第1ナノワイヤー形成層の露出された領域上に多結晶ナノワイヤーを形成する段階と、
前記多結晶ナノワイヤーにレーザーを照射する段階と、をさらに含むことを特徴とする請求項1に記載のナノワイヤーの形成方法。 - 前記多結晶ナノワイヤーは、超高真空化学気相蒸着装置においてソースガスとしてIV族半導体元素を含む前駆体を供給して形成することを特徴とする請求項14に記載のナノワイヤーの形成方法。
- 前記第1段階は、
前記基板上に少なくとも2つの前記物質膜パターンを離隔して形成することを特徴とする請求項1に記載のナノワイヤーの形成方法。 - 前記レーザー照射段階は、
前記多結晶ナノワイヤーの一部を除去した後、残っている多結晶ナノワイヤーに前記レーザー照射を実施することを特徴とする請求項14に記載のナノワイヤーの形成方法。 - 前記レーザー照射段階は、
前記多結晶ナノワイヤーにレーザーを照射した後、前記単結晶ナノワイヤーの一部を除去することを特徴とする請求項14に記載のナノワイヤーの形成方法。 - 基板上に多結晶ナノワイヤーを形成する第1段階と、
前記多結晶ナノワイヤーを単結晶ナノワイヤーに変換する第2段階と、を含むことを特徴とするナノワイヤーの形成方法。 - 前記第1段階は、
前記基板上に複数の多結晶ナノワイヤーを離隔して形成することを特徴とする請求項19に記載のナノワイヤーの形成方法。 - 前記第1段階は、
前記基板上にナノワイヤー形成層及び絶縁膜を順次に形成する段階と、
前記ナノワイヤー形成層及び絶縁膜を逆順にパターニングして前記ナノワイヤー形成層の側面を露出させる段階と、
前記ナノワイヤー形成層の露出された側面に選択的に多結晶ナノワイヤーを形成する段階と、
前記絶縁膜及びナノワイヤー形成層を除去する段階と、をさらに含むことを特徴とする請求項19に記載のナノワイヤーの形成方法。 - 前記絶縁膜は、前記多結晶ナノワイヤー形成に使われるソースガスに対する反応率が前記ナノワイヤー形成層より低い物質からなることを特徴とする請求項21に記載のナノワイヤーの形成方法。
- 前記ナノワイヤー形成層は、シリコンナイトライド層からなることを特徴とする請求項21に記載のナノワイヤーの形成方法。
- 前記ソースガスは、IV族半導体元素を含む前駆体ガスであることを特徴とする請求項22に記載のナノワイヤーの形成方法。
- 前記多結晶ナノワイヤー形成段階は、
シリコンナノワイヤー、Geナノワイヤー及びSiGeナノワイヤーのうち、いずれか1つからなることを特徴とする請求項19に記載のナノワイヤーの形成方法。 - 前記多結晶ナノワイヤーは、超高真空化学気相蒸着装置において形成することを特徴とする請求項19に記載のナノワイヤーの形成方法。
- 前記第2段階は、前記多結晶ナノワイヤーにレーザーを照射する段階をさらに含むことを特徴とする請求項19に記載のナノワイヤーの形成方法。
- 前記絶縁膜及び前記ナノワイヤー形成層の除去段階は、
前記第2段階の実施後に行うことを特徴とする請求項21に記載のナノワイヤーの形成方法。 - 前記複数の多結晶ナノワイヤーの一部の太さは残りの部分と異なることを特徴とする請求項20に記載のナノワイヤーの形成方法。
- 前記多結晶ナノワイヤー形成段階は、
その形成過程に供給されるドーピングガスでドーピングされることを特徴とする請求項21に記載のナノワイヤーの形成方法。 - 前記多結晶ナノワイヤーは、超高真空化学気相蒸着設備で形成することを特徴とする請求項21に記載のナノワイヤーの形成方法。
- 前記第2段階は、前記多結晶ナノワイヤーにレーザーを照射する段階をさらに含むことを特徴とする請求項21に記載のナノワイヤーの形成方法。
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