JP2013524522A - アミノ金属前駆体とハロゲン化金属前駆体との化合を使用する金属窒化物含有膜堆積 - Google Patents
アミノ金属前駆体とハロゲン化金属前駆体との化合を使用する金属窒化物含有膜堆積 Download PDFInfo
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- JP2013524522A JP2013524522A JP2013502893A JP2013502893A JP2013524522A JP 2013524522 A JP2013524522 A JP 2013524522A JP 2013502893 A JP2013502893 A JP 2013502893A JP 2013502893 A JP2013502893 A JP 2013502893A JP 2013524522 A JP2013524522 A JP 2013524522A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 103
- 239000002184 metal Substances 0.000 title claims abstract description 101
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- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 title claims abstract description 40
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- 238000000034 method Methods 0.000 claims abstract description 69
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- 239000000376 reactant Substances 0.000 claims description 41
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- 229910052581 Si3N4 Inorganic materials 0.000 claims description 30
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 30
- 238000010926 purge Methods 0.000 claims description 29
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- 230000008859 change Effects 0.000 description 3
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- 238000010494 dissociation reaction Methods 0.000 description 2
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- 150000002843 nonmetals Chemical class 0.000 description 2
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- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 2
- GIRKRMUMWJFNRI-UHFFFAOYSA-N tris(dimethylamino)silicon Chemical compound CN(C)[Si](N(C)C)N(C)C GIRKRMUMWJFNRI-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
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- 239000010937 tungsten Substances 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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- 125000003282 alkyl amino group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
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- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- H—ELECTRICITY
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- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
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- H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
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- H—ELECTRICITY
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Abstract
【選択図】 図1
Description
本願は、2010年4月1日に出願された米国仮出願第61/320,236号の利益を主張し、その全内容は参照により本明細書に組み込まれている。
アミノ金属前駆体とハロゲン化金属前駆体との化合から金属窒化物含有膜を形成する、好ましくはアミノシラン前駆体とクロロシラン前駆体との化合からSiN含有膜を形成する方法を開示する。アミノ金属前駆体とハロゲン化金属前駆体との逐次反応を変更することは種々の化学量論比を有する金属窒化物含有膜の形成を提供する。加えて、金属窒化物含有膜の組成はアミノ金属前駆体の構造に基づいて変更することができる。開示する方法は熱プロセスまたは低温でのプラズマプロセスでありうる。
金属窒化物含有膜、たとえば窒化珪素(SiN)膜は半導体デバイスおよび超大規模集積(ULSI)回路において広く使用されている。より高いLSI実装密度をますます必要とする電子機器の小型化および高まる複雑化に応じて、SiN膜は漏電電流に対するその膜質を向上させることを必要とされている。加えて、SiCN膜はCu配線のためのデュアルダマシン構造におけるエッチングストッパーとしても使用される。
いくつかの略語、記号、および用語を以下の説明および特許請求の範囲を通じて使用している。たとえば:略語「A」はオングストロームを表し、1オングストローム=100ピコメートルであり;略語「PECVD」はプラズマ強化化学気相堆積を表し;略語「CVD」は化学気相堆積を表し;略語「RF」は高周波を表し、略語「DR」は堆積速度を表し、略語「RI」は屈折率を表す。
金属窒化物含有膜を形成する方法を開示する。ハロゲン化金属前駆体を少なくとも1枚の基板を収容したALDリアクタに導入する。次に、過剰なハロゲン化金属前駆体をリアクタからパージする。アミノ金属前駆体をリアクタに導入する。次に、過剰なアミノ金属前駆体をリアクタからパージする。任意に、反応剤をリアクタに導入することができる。次に、過剰な任意の反応剤をリアクタからパージする。ハロゲン化金属前駆体の金属とアミノ金属前駆体の金属とは同じであってもよいしまたは異なっていてもよい。
・反応剤はN2、NH3、N2H4、NMeH2、NEtH2、NMe2H、NEt2H、NMe3、NEt3、MeHNNH2、Me2NNH2、フェニルヒドラジン、およびこれらの混合物からなる群より選択される;
・反応剤はNH3である;
・方法の工程の順序を変えることにより、特定の化学量論比を有する金属窒化物含有膜を製造する;
・ハロゲン化前駆体は塩化金属前駆体である;
・金属窒化物含有膜は1種または2種の金属を含有する金属炭窒化物膜である;
・金属は遷移金属元素、金属元素または非金属元素から選択される;
・金属はホウ素またはリンである;
・金属窒化物含有膜は窒化珪素含有膜である;
・ハロゲン化金属前駆体はクロロシラン前駆体である;
・アミノ金属前駆体はアミノシラン前駆体である;
・窒化珪素含有膜は炭素ドープされたSiN膜である;
・クロロシラン前駆体は式SiaHbClc(ここで、b+c=2a+2である)を有する;
・クロロシラン前駆体を混合物として導入する;
・アミノシラン前駆体は式H4-xSi(NR'R'')x(ここで、x=1、2、3、または4であり、R'およびR''はHまたはアルキル基から独立して選択され、R'およびR''は結合して環状構造を形成してもよい)を有する;
・アミノシラン前駆体はアミノクロロシランまたはアミノアルキルシランを含む;
・アミノクロロシラン前駆体は式Cl4-xSi(NR'R'')x(ここで、x=2または3であり、R'およびR''はHまたはアルキル基から独立して選択され、R'およびR''は結合して環状構造を形成してもよい)を有する;および
・アミノアルキルシラン前駆体は式R'''4-xSi(NR'R'')x(ここで、x=1、2、または3であり、R'およびR''はHまたはアルキル基から独立して選択され、R'およびR''は結合して環状構造を形成してもよく、R'''基は3個未満の炭素原子を有するアルキル基である)を有する。
アミノ金属前駆体とハロゲン化金属前駆体との交互供給を使用する金属窒化物含有膜を形成するALD法を開示する。アミノ−金属前駆体とハロゲン化金属前駆体との逐次反応は緻密な金属リッチ膜を製造する。ハロゲン化金属前駆体の金属はアミノ金属前駆体の金属と同じであってもよいしまたは異なっていてもよい。
−アミノシランおよびクロロシランの調節可能な化合によるSiN膜への炭素挿入。
−この化合における比の変更は様々な組成の膜を作る。
本発明の実施形態をさらに説明するために以下の非限定的な例を提供する。しかしながら、この例は包括的なものであることを意図したものではなく、発明の範囲をここに説明するものに限定することを意図していない。
ALD法ならびにトリクロロシラン(3CS)前駆体およびトリ(ジメチルアミノ)シラン(3DMAS)前駆体を使用して、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、100sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmの3CSのパルスを反応チャンバに10秒間供給する工程、2)3CS前駆体を100sccmのArで30秒間パージする工程、3)約1sccmの3DMASのパルスを反応チャンバに10秒間供給する工程、および4)3DMAS前駆体を100sccmのArで30秒間パージする工程。順序1)ないし4)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しヘキサクロロジシラン(HCDS)およびトリ(ジメチルアミノ)シラン(3DMAS)前駆体ならびにアンモニア(NH3)反応剤を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmの3DMASのパルスを反応チャンバに10秒間導入する工程、2)3DMAS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、4)HCDS前駆体を55sccmのArで30秒間パージする工程、5)約50sccmのNH3のパルスを反応チャンバに10秒間導入する工程、および6)NH3反応剤を55sccmのArで10秒間パージする工程。順序1)ないし6)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しHCDS 3DMAS前駆体およびアンモニア(NH3)反応剤を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、2)HCDS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmの3DMASのパルスを反応チャンバに10秒間導入する工程、4)3DMAS前駆体を55sccmのArで30秒間パージする工程、5)約50sccmのNH3のパルスを反応チャンバに10秒間導入する工程、および6)NH3反応剤を55sccmのArで10秒間パージする工程。順序1)ないし6)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しHCDSおよび3DMAS前駆体を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmの3DMASのパルスを反応チャンバに10秒間導入する工程、2)3DMAS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、および4)HCDS前駆体を55sccmのArで30秒間パージする工程。順序1)ないし4)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しヘキサクロロジシラン(HCDS)およびテトラキス(ジメチルアミノ)シラン(4DMAS)前駆体ならびにアンモニア(NH3)反応剤を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmの4DMASのパルスを反応チャンバに10秒間導入する工程、2)4DMAS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、4)HCDS前駆体を55sccmのArで30秒間パージする工程、5)約50sccmのNH3のパルスを反応チャンバに10秒間導入する工程、および6)NH3反応剤を55sccmのArで10秒間パージする工程。順序1)ないし6)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しHCDSおよび4DMAS前駆体ならびにアンモニア(NH3)反応剤を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、2)HCDS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmの4DMASのパルスを反応チャンバに10秒間導入する工程、4)4DMAS前駆体を55sccmのArで30秒間パージする工程、5)約50sccmのNH3のパルスを反応チャンバに10秒間導入する工程、および6)NH3反応剤を55sccmのArで10秒間パージする工程。順序1)ないし6)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しHCDSおよび4DMAS前駆体を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmの4DMASのパルスを反応チャンバに10秒間導入する工程、2)4DMAS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、および4)HCDS前駆体を55sccmのArで30秒間パージする工程。順序1)ないし4)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しヘキサクロロジシラン(HCDS)およびビス(ジエチルアミノ)シラン(BDEAS)前駆体ならびにアンモニア(NH3)反応剤を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmのBDEASのパルスを反応チャンバに10秒間導入する工程、2)BDEAS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、4)HCDS前駆体を55sccmのArで30秒間パージする工程、5)約50sccmのNH3のパルスを反応チャンバに10秒間導入する工程、および6)NH3反応剤を55sccmのArで10秒間パージする工程。順序1)ないし6)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しHCDSおよびBDEAS前駆体ならびにアンモニア(NH3)反応剤を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、2)HCDS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのBDEASのパルスを反応チャンバに10秒間導入する工程、4)BDEAS前駆体を55sccmのArで30秒間パージする工程、5)約50sccmのNH3のパルスを反応チャンバに10秒間導入する工程、および6)NH3反応剤を55sccmのArで10秒間パージする工程。順序1)ないし6)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
ALD法を使用しHCDSおよびBDEAS前駆体を用いて、緻密なSiCN膜を堆積させた。反応チャンバは5Torr、550℃に制御され、55sccmのArが連続的に流れていた。堆積プロセスは以下の工程から構成されていた:1)約1sccmのBDEASのパルスを反応チャンバに10秒間導入する工程、2)BDEAS前駆体を55sccmのArで30秒間パージする工程、3)約1sccmのHCDSのパルスを反応チャンバに10秒間導入する工程、および4)HCDS前駆体を55sccmのArで30秒間パージする工程。順序1)ないし4)を、堆積させた層が好適な膜厚を達成するまで繰り返した。
出願人は、開示したALD法を使用しHfCl4および3DMAS前駆体を用いて、緻密なHfSiCN膜が堆積されるであろうと考えている。出願人は、開示する方法を使用して、得られる膜における化学量論比を変えることができると考えている。
出願人は、開示したALD法を使用しテトラキス(エチルメチルアミノ)ハフニウムおよびHCDS前駆体を用いて、HfSiCN膜が堆積されるであろうと考えている。出願人は、開示する方法を使用して、得られる膜における化学量論比を変えることができると考えている。
Claims (15)
- 金属窒化物含有膜を形成する方法であって、前記方法は:
a)ハロゲン化金属前駆体を少なくとも1枚の基板を収容したALDリアクタに導入する工程と;
b)過剰なハロゲン化金属前駆体を前記リアクタからパージする工程と;
c)アミノ金属前駆体を前記リアクタに導入する工程と;
d)過剰なアミノ金属前駆体を前記リアクタからパージする工程と;
e)任意に、反応剤を前記リアクタに導入する工程と;
f)任意に、過剰な反応剤を前記リアクタからパージする工程と
を含み、
前記ハロゲン化金属前駆体およびアミノ金属前駆体の金属は同じまたは異なる方法。 - 前記反応剤はN2、NH3、N2H4、NMeH2、NEtH2、NMe2H、NEt2H、NMe3、NEt3、MeHNNH2、Me2NNH2、フェニルヒドラジン、およびこれらの混合物からなる群より選択され、好ましくはNH3である請求項1に記載の方法。
- 方法の工程の順序を変えることにより、特定の化学量論比を有する金属窒化物含有膜を製造することができる請求項1または2に記載の方法。
- 前記ハロゲン化前駆体は塩化金属前駆体である請求項1〜3のいずれか1項に記載の方法。
- 前記金属窒化物含有膜は1種または2種の金属を含有する金属炭窒化物膜である請求項1〜4のいずれか1項に記載の方法。
- 前記金属は遷移金属元素、金属元素または非金属元素から選択される請求項1〜5のいずれか1項に記載の方法。
- 前記金属はホウ素またはリンである請求項1〜6のいずれか1項に記載の方法。
- 前記金属窒化物含有膜は窒化珪素含有膜であり、前記ハロゲン化金属前駆体はクロロシラン前駆体であり、前記アミノ金属前駆体はアミノシラン前駆体である請求項1〜7のいずれか1項に記載の方法。
- 前記窒化珪素含有膜は炭素ドープされたSiN膜である請求項8に記載の方法。
- 前記クロロシラン前駆体は式SiaHbClcを有し、ここでb+c=2a+2である請求項8または9に記載の方法。
- 前記クロロシラン前駆体を混合物として導入する請求項8〜10のいずれか1項に記載の方法。
- 前記アミノシラン前駆体は式H4-xSi(NR'R'')xを有し、ここでx=1、2、3、または4であり、R'およびR''はHまたはアルキル基から独立して選択され、R'およびR''は結合して環状構造を形成してもよい請求項8〜11のいずれか1項に記載の方法。
- 前記アミノシラン前駆体はアミノクロロシランまたはアミノアルキルシランを含む請求項12に記載の方法。
- 前記アミノクロロシラン前駆体は式Cl4-xSi(NR'R'')xを有し、ここでx=2または3であり、R'およびR''は上で定義したものである請求項13に記載の方法。
- 前記アミノアルキルシラン前駆体は式R'''4-xSi(NR'R'')xを有し、ここでx=1、2、または3であり、R'およびR''は上で定義したものであり、R'''基は3個未満の炭素原子を有するアルキル基である請求項13に記載の方法。
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KR (1) | KR101226876B1 (ja) |
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- 2011-04-01 TW TW100111512A patent/TWI498447B/zh active
- 2011-04-01 CN CN2011800033921A patent/CN102471885A/zh active Pending
- 2011-04-01 US US13/389,242 patent/US20130078376A1/en not_active Abandoned
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JP2020188100A (ja) * | 2019-05-13 | 2020-11-19 | 大陽日酸株式会社 | シリコン含有薄膜形成用シリコン含有化合物、及びシリコン含有薄膜の形成方法 |
JP7156999B2 (ja) | 2019-05-13 | 2022-10-19 | 大陽日酸株式会社 | シリコン含有薄膜形成用シリコン含有化合物、及びシリコン含有薄膜の形成方法 |
Also Published As
Publication number | Publication date |
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EP2553141A4 (en) | 2013-08-21 |
EP2730676A1 (en) | 2014-05-14 |
TWI498447B (zh) | 2015-09-01 |
US20130078376A1 (en) | 2013-03-28 |
WO2011123792A2 (en) | 2011-10-06 |
KR101226876B1 (ko) | 2013-01-28 |
WO2011123792A3 (en) | 2011-12-01 |
CN102471885A (zh) | 2012-05-23 |
KR20120028999A (ko) | 2012-03-23 |
TW201213597A (en) | 2012-04-01 |
EP2553141A2 (en) | 2013-02-06 |
JP5815669B2 (ja) | 2015-11-17 |
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