JP6053490B2 - 半導体装置の作製方法 - Google Patents
半導体装置の作製方法 Download PDFInfo
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- JP6053490B2 JP6053490B2 JP2012271904A JP2012271904A JP6053490B2 JP 6053490 B2 JP6053490 B2 JP 6053490B2 JP 2012271904 A JP2012271904 A JP 2012271904A JP 2012271904 A JP2012271904 A JP 2012271904A JP 6053490 B2 JP6053490 B2 JP 6053490B2
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Classifications
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1222—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer
- H01L27/1225—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1248—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/10—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1025—Channel region of field-effect devices
- H01L29/1029—Channel region of field-effect devices of field-effect transistors
- H01L29/1033—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/24—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only semiconductor materials not provided for in groups H01L29/16, H01L29/18, H01L29/20, H01L29/22
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Description
本実施の形態では、本発明の一態様である半導体装置および半導体装置の作製方法の一形態を図1乃至図4を用いて説明する。
図1は、本実施の形態の方法にて作製された半導体装置の構成例である。図1に示すトランジスタ450は、絶縁表面を有する基板400上に設けられた下地絶縁膜432と、下地絶縁膜432上のチャネル形成領域403c、並びにチャネル形成領域403cを挟む低抵抗領域403aおよび低抵抗領域403bとを含む酸化物半導体膜403と、酸化物半導体膜403上のゲート絶縁膜412aと、ゲート絶縁膜412a上の、チャネル形成領域403cと重畳するゲート電極401aと、ゲート絶縁膜412aおよびゲート電極401a上の絶縁膜415bと、下地絶縁膜432および低抵抗領域403aの一部と重畳するソース電極405aと、下地絶縁膜432および低抵抗領域403bの一部と重畳するドレイン電極405bと、ソース電極405aおよびドレイン電極405b上の絶縁膜425aと、を有する。
トランジスタ450の作製方法について図2乃至図4を用いて説明する。
本実施の形態では、実施の形態1とは異なる本発明の一態様の半導体装置の構成について説明する。
図5は、本実施の形態の方法にて作製された半導体装置の構成例である。図5に示すトランジスタ470は、絶縁表面を有する基板400上に設けられた下地絶縁膜432と、下地絶縁膜432上の低抵抗領域403a、低抵抗領域403aを囲うチャネル形成領域403c、並びにチャネル形成領域403cを囲う低抵抗領域403bとを含む酸化物半導体膜403と、酸化物半導体膜403上のゲート絶縁膜412aと、ゲート絶縁膜412a上の、チャネル形成領域403cと重畳するゲート電極401aと、ゲート絶縁膜412aおよびゲート電極401a上の絶縁膜415bと、低抵抗領域403aの一部と重畳するソース電極405aと、下地絶縁膜432および低抵抗領域403bの一部と重畳するドレイン電極405bと、ソース電極405aおよびドレイン電極405b上の絶縁膜425aと、絶縁膜415b、絶縁膜425a、ソース電極405aおよびドレイン電極405b上の層間絶縁膜427と、絶縁膜415bおよび絶縁膜425aに設けられた開口を介してゲート電極401a、ソース電極405aおよびドレイン電極405bとそれぞれ電気的に接続する配線層431a、配線層431bおよび配線層431cと、を有する。
トランジスタ470の作製方法について説明する。なお、実施の形態1と同様の点については説明を省略する。
本実施の形態では、実施の形態1に示すトランジスタを使用し、電力が供給されない状況でも記憶内容の保持が可能で、かつ、書き込み回数にも制限が無い半導体装置の一例を、図面を用いて説明する。なお、本実施の形態の半導体装置は、トランジスタ162として実施の形態1に記載のトランジスタ450を適用して構成される。
本実施の形態においては、実施の形態1に示すトランジスタを使用し、電力が供給されない状況でも記憶内容の保持が可能で、かつ、書き込み回数にも制限が無い半導体装置について、実施の形態3に示した構成と異なる構成について、図7および図8を用いて説明を行う。なお、本実施の形態の半導体装置は、トランジスタ162として実施の形態1に記載のトランジスタを適用して構成される。トランジスタ162としては、先の実施の形態で示すトランジスタのいずれの構造も適用することができる。
本実施の形態では、先の実施の形態で示した半導体装置を携帯電話、スマートフォン、電子書籍などの携帯機器に応用した場合の例を図9乃至図12を用いて説明する。
106 素子分離絶縁膜
108 ゲート絶縁膜
110 ゲート電極
116 チャネル形成領域
120 不純物領域
124 金属間化合物領域
130 絶縁膜
135 絶縁膜
142a ソース電極
142b ドレイン電極
144 酸化物半導体膜
144a 低抵抗領域
144b 低抵抗領域
144c チャネル形成領域
146 ゲート絶縁膜
148 ゲート電極
149 層間絶縁膜
150 絶縁膜
152 絶縁膜
153 導電膜
156a 配線
156b 配線
160 トランジスタ
162 トランジスタ
164 容量素子
250 メモリセル
251 メモリセルアレイ
251a メモリセルアレイ
251b メモリセルアレイ
400 基板
401 導電膜
401a ゲート電極
403 酸化物半導体膜
403a 低抵抗領域
403b 低抵抗領域
403c チャネル形成領域
405 導電膜
405a ソース電極
405b ドレイン電極
407 反射防止膜
407a 反射防止膜
412 ゲート絶縁膜
412a ゲート絶縁膜
415 絶縁膜
415a 絶縁膜
415b 絶縁膜
420 レジストマスク
421 不純物
425 絶縁膜
425a 絶縁膜
427 層間絶縁膜
430 レジストマスク
431a 配線層
431b 配線層
431c 配線層
432 下地絶縁膜
450 トランジスタ
470 トランジスタ
801 トランジスタ
803 トランジスタ
804 トランジスタ
805 トランジスタ
806 トランジスタ
807 Xデコーダー
808 Yデコーダー
811 トランジスタ
812 保持容量
813 Xデコーダー
814 Yデコーダー
901 RF回路
902 アナログベースバンド回路
903 デジタルベースバンド回路
904 バッテリー
905 電源回路
906 アプリケーションプロセッサ
907 CPU
908 DSP
909 インターフェイス(IF)
910 フラッシュメモリ
911 ディスプレイコントローラ
912 メモリ回路
913 ディスプレイ
914 表示部
915 ソースドライバ
916 ゲートドライバ
917 音声回路
918 キーボード
919 タッチセンサ
950 メモリ回路
951 メモリコントローラ
952 メモリ
953 メモリ
954 スイッチ
955 スイッチ
956 ディスプレイコントローラ
957 ディスプレイ
1001 バッテリー
1002 電源回路
1003 マイクロプロセッサ
1004 フラッシュメモリ
1005 音声回路
1006 キーボード
1007 メモリ回路
1008 タッチパネル
1009 ディスプレイ
1010 ディスプレイコントローラ
Claims (9)
- 絶縁表面上の酸化物半導体膜と、
前記酸化物半導体膜上のゲート絶縁膜と、
前記ゲート絶縁膜上の第1の導電膜と、を形成し、
前記第1の導電膜上にハードマスク膜を形成し、
電子ビーム露光を行うことで前記ハードマスク膜上に第1のレジストを形成し、
前記第1のレジストをマスクとして前記ハードマスク膜を選択的にエッチングし、
エッチングされた前記ハードマスク膜をマスクとして前記第1の導電膜を選択的にエッチングすることでゲート電極を形成し、
前記ゲート絶縁膜上及び前記ゲート電極上に第1の絶縁膜を形成し、
前記ゲート電極が露出しないように、前記第1の絶縁膜の一部に第1の除去処理を行い、
前記第1の除去処理を行った前記第1の絶縁膜上に反射防止膜を形成し、
電子ビーム露光を行うことで前記反射防止膜上に前記酸化物半導体膜と重なる領域を有する第2のレジストを形成し、
前記第2のレジストをマスクとして前記反射防止膜、前記第1の絶縁膜、及び前記ゲート絶縁膜を選択的にエッチングして、前記絶縁表面、前記酸化物半導体膜の一部を露出させ、
露出させた前記絶縁表面、前記酸化物半導体膜、及び前記反射防止膜上に第2の導電膜を形成し、
前記第2の導電膜上に第2の絶縁膜を形成し、
前記第2のレジストをマスクとして選択的にエッチングされた前記第1の絶縁膜が露出するように、前記第2の絶縁膜、前記第2の導電膜の一部、及び前記第2のレジストをマスクとして選択的にエッチングされた前記反射防止膜に第2の除去処理を行い、
前記第2の導電膜の一部に前記第2の除去処理を行うことでソース電極及びドレイン電極が形成される半導体装置の作製方法。 - 絶縁表面上の酸化物半導体膜と、
前記酸化物半導体膜上のゲート絶縁膜と、
前記ゲート絶縁膜上の第1の導電膜と、を形成し、
前記第1の導電膜上にハードマスク膜を形成し、
電子ビーム露光を行うことで前記ハードマスク膜上に第1のレジストを形成し、
前記第1のレジストをマスクとして前記ハードマスク膜を選択的にエッチングし、
エッチングされた前記ハードマスク膜をマスクとして前記第1の導電膜を選択的にエッチングすることでゲート電極を形成し、
前記酸化物半導体膜に不純物を添加し、前記ゲート電極と重なる領域を有するチャネル形成領域と、前記チャネル形成領域を挟む第1の低抵抗領域及び第2の低抵抗領域とを、それぞれ前記酸化物半導体膜中に形成し、
前記ゲート絶縁膜上及び前記ゲート電極上に第1の絶縁膜を形成し、
前記ゲート電極が露出しないように、前記第1の絶縁膜の一部に第1の除去処理を行い、
前記第1の除去処理を行った前記第1の絶縁膜上に反射防止膜を形成し、
電子ビーム露光を行うことで前記反射防止膜上に前記酸化物半導体膜と重なる領域を有する第2のレジストを形成し、
前記第2のレジストをマスクとして前記反射防止膜、前記第1の絶縁膜、及び前記ゲート絶縁膜を選択的にエッチングして、前記絶縁表面、前記第1の低抵抗領域の一部、及び前記第2の低抵抗領域の一部を露出させ、
露出させた前記絶縁表面、前記第1の低抵抗領域の一部、前記第2の低抵抗領域の一部、及び前記反射防止膜上に第2の導電膜を形成し、
前記第2の導電膜上に第2の絶縁膜を形成し、
前記第2のレジストをマスクとして選択的にエッチングされた前記第1の絶縁膜が露出するように、前記第2の絶縁膜、前記第2の導電膜の一部、及び前記第2のレジストをマスクとして選択的にエッチングされた前記反射防止膜に第2の除去処理を行い、
前記第2の導電膜の一部に前記第2の除去処理を行うことでソース電極及びドレイン電極が形成される半導体装置の作製方法。 - 前記ハードマスク膜は、窒化酸化シリコン膜と前記窒化酸化シリコン膜上のアモルファスシリコン膜とを有する積層膜、または、窒化酸化シリコン膜と前記窒化酸化シリコン膜上のアモルファスシリコン膜とを有する積層膜である請求項1または請求項2に記載の半導体装置の作製方法。
- 絶縁表面上の酸化物半導体膜と、
前記酸化物半導体膜上のゲート絶縁膜と、
前記ゲート絶縁膜上の第1の導電膜と、を形成し、
前記第1の導電膜上に第1のハードマスク膜を形成し、
前記第1のハードマスク膜上に第2のハードマスク膜を形成し、
電子ビーム露光を行うことで前記第2のハードマスク膜上に第1のレジストを形成し、
前記第1のレジストをマスクとして前記第2のハードマスク膜を選択的にエッチングし、
エッチングされた前記第2のハードマスク膜をマスクとして前記第1のハードマスク膜を選択的にエッチングし、
エッチングされた前記第1のハードマスク膜をマスクとして前記第1の導電膜を選択的にエッチングすることでゲート電極を形成し、
前記ゲート絶縁膜上及び前記ゲート電極上に第1の絶縁膜を形成し、
前記ゲート電極が露出しないように、前記第1の絶縁膜の一部に第1の除去処理を行い、
前記第1の除去処理を行った前記第1の絶縁膜上に反射防止膜を形成し、
電子ビーム露光を行うことで前記反射防止膜上に前記酸化物半導体膜と重なる領域を有する第2のレジストを形成し、
前記第2のレジストをマスクとして前記反射防止膜、前記第1の絶縁膜、及び前記ゲート絶縁膜を選択的にエッチングして、前記絶縁表面、前記酸化物半導体膜の一部を露出させ、
露出させた前記絶縁表面、前記酸化物半導体膜、及び前記反射防止膜上に第2の導電膜を形成し、
前記第2の導電膜上に第2の絶縁膜を形成し、
前記第2のレジストをマスクとして選択的にエッチングされた前記第1の絶縁膜が露出するように、前記第2の絶縁膜、前記第2の導電膜の一部、及び前記第2のレジストをマスクとして選択的にエッチングされた前記反射防止膜に第2の除去処理を行い、
前記第2の導電膜の一部に前記第2の除去処理を行うことでソース電極及びドレイン電極が形成される半導体装置の作製方法。 - 絶縁表面上の酸化物半導体膜と、
前記酸化物半導体膜上のゲート絶縁膜と、
前記ゲート絶縁膜上の第1の導電膜と、を形成し、
前記第1の導電膜上に第1のハードマスク膜を形成し、
前記第1のハードマスク膜上に第2のハードマスク膜を形成し、
電子ビーム露光を行うことで前記第2のハードマスク膜上に第1のレジストを形成し、
前記第1のレジストをマスクとして前記第2のハードマスク膜を選択的にエッチングし、
エッチングされた前記第2のハードマスク膜をマスクとして前記第1のハードマスク膜を選択的にエッチングし、
エッチングされた前記第1のハードマスク膜をマスクとして前記第1の導電膜を選択的にエッチングすることでゲート電極を形成し、
前記酸化物半導体膜に不純物を添加し、前記ゲート電極と重なる領域を有するチャネル形成領域と、前記チャネル形成領域を挟む第1の低抵抗領域及び第2の低抵抗領域とを、それぞれ前記酸化物半導体膜中に形成し、
前記ゲート絶縁膜上及び前記ゲート電極上に第1の絶縁膜を形成し、
前記ゲート電極が露出しないように、前記第1の絶縁膜の一部に第1の除去処理を行い、
前記第1の除去処理を行った前記第1の絶縁膜上に反射防止膜を形成し、
電子ビーム露光を行うことで前記反射防止膜上に前記酸化物半導体膜と重なる領域を有する第2のレジストを形成し、
前記第2のレジストをマスクとして前記反射防止膜、前記第1の絶縁膜、及び前記ゲート絶縁膜を選択的にエッチングして、前記絶縁表面、前記第1の低抵抗領域の一部、及び前記第2の低抵抗領域の一部を露出させ、
露出させた前記絶縁表面、前記第1の低抵抗領域の一部、前記第2の低抵抗領域の一部、及び前記反射防止膜上に第2の導電膜を形成し、
前記第2の導電膜上に第2の絶縁膜を形成し、
前記第2のレジストをマスクとして選択的にエッチングされた前記第1の絶縁膜が露出するように、前記第2の絶縁膜、前記第2の導電膜の一部、及び前記第2のレジストをマスクとして選択的にエッチングされた前記反射防止膜に第2の除去処理を行い、
前記第2の導電膜の一部に前記第2の除去処理を行うことでソース電極及びドレイン電極が形成される半導体装置の作製方法。 - 前記第1のハードマスク膜は、窒化酸化シリコン膜または酸化シリコン膜である請求項4または請求項5に記載の半導体装置の作製方法。
- 前記第2のハードマスク膜は、アモルファスシリコン膜である請求項4乃至請求項6のいずれか一に記載の半導体装置の作製方法。
- 前記第1の除去処理または前記第2の除去処理は、化学的機械研磨を用いる請求項1乃至請求項7のいずれか一に記載の半導体装置の作製方法。
- 前記反射防止膜を形成した後、前記第2のレジストを形成する前に、前記反射防止膜上に第3のハードマスク膜を形成し、
前記第3のハードマスク膜は、窒化酸化シリコン膜と前記窒化酸化シリコン膜上のアモルファスシリコン膜とを有する積層膜、または、窒化酸化シリコン膜と前記窒化酸化シリコン膜上のアモルファスシリコン膜とを有する積層膜である請求項1乃至請求項8のいずれか一に記載の半導体装置の作製方法。
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