JP6285150B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6285150B2 JP6285150B2 JP2013233600A JP2013233600A JP6285150B2 JP 6285150 B2 JP6285150 B2 JP 6285150B2 JP 2013233600 A JP2013233600 A JP 2013233600A JP 2013233600 A JP2013233600 A JP 2013233600A JP 6285150 B2 JP6285150 B2 JP 6285150B2
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- JP
- Japan
- Prior art keywords
- film
- transistor
- semiconductor film
- conductive film
- oxide semiconductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
-
- 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
- H01L29/04—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes
- H01L29/045—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes by their particular orientation of crystalline planes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Description
図1に、本発明の一態様に係る半導体装置が有する、トランジスタの一形態を示す。図1(A)はトランジスタ10の上面図である。図1(B)は、図1(A)に示したトランジスタ10の、破線A1−A2における断面構造を示した図に相当する。図1(C)は、図1(A)に示したトランジスタ10の、破線A3−A4における断面構造を示した図に相当する。なお、図1(A)では、トランジスタ10のレイアウトを明確にするために、ゲート絶縁膜などの各種絶縁膜を省略している。
次いで、図2(A)に示すトランジスタ10と、図2(B)に示すトランジスタ20とで、ドレイン電極に高い電圧を印加する試験を行い、それぞれの閾値電圧の変化量を調べた結果について説明する。
次いで、図3に、本発明の一態様に係る半導体装置が有する、トランジスタの別の形態を示す。図3(A)はトランジスタ30の上面図である。図3(B)は、図3(A)に示したトランジスタ30の、破線B1−B2における断面構造を示した図に相当する。図3(C)は、図3(A)に示したトランジスタ30の、破線B3−B4における断面構造を示した図に相当する。図3(D)は、図3(A)に示したトランジスタ30の、破線B5−B6における断面構造を示した図に相当する。なお、図3(A)では、トランジスタ30のレイアウトを明確にするために、ゲート絶縁膜などの各種絶縁膜を省略している。
なお、図3に示したトランジスタ30は、導電膜35が有する凸部60と、導電膜36が有する凸部60とが、チャネル長方向において完全に重なり合う構造を有しているが、本発明の一態様では、凸部60どうしがチャネル長方向において部分的に重なり合う構造を有していても良い。
なお、図1乃至図5では、ゲート電極上に半導体膜が存在するボトムゲート型のトランジスタ構造について説明したが、図1乃至図5に示したトランジスタは、それぞれ、ゲート電極下に半導体膜が存在するトップゲート型であっても良い。
また、図3に示したトランジスタ30を二つ、並列に接続させた場合の上面図を一例として図7(A)に示す。
本発明の一態様に係る半導体装置では、トランジスタの半導体膜として、非晶質、微結晶、多結晶又は単結晶である、シリコン又はゲルマニウムなどを含む半導体膜を用いても良いし、シリコンよりもバンドギャップが広く、真性キャリア密度がシリコンよりも低い、酸化物半導体などの半導体を含む半導体膜を、用いても良い。
以下、本発明の一態様に係る半導体装置の作製方法の一例について、説明する。
次いで、本発明の一態様に係る半導体装置が有する各種回路の構成例について説明する。図12(A)乃至図12(C)に、順序回路80、及び順序回路80を含むシフトレジスタ300の構成例を示す。
本発明の一態様では、本発明の半導体装置の一つに相当する半導体表示装置の、構成例について説明する。
本発明の一態様に係る半導体装置は、表示機器、パーソナルコンピュータ、記録媒体を備えた画像再生装置(代表的にはDVD:Digital Versatile Disc等の記録媒体を再生し、その画像を表示しうるディスプレイを有する装置)に用いることができる。その他に、本発明の一態様に係る半導体装置を用いることができる電子機器として、携帯電話、携帯型を含むゲーム機、携帯情報端末、電子書籍、ビデオカメラ、デジタルスチルカメラなどのカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンター、プリンター複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図14に示す。
11 基板
12 導電膜
13 ゲート絶縁膜
14 半導体膜
14n 領域
15 導電膜
16 導電膜
17 酸化物膜
18 領域
19a 領域
19b 領域
20 トランジスタ
22 導電膜
24 半導体膜
25 導電膜
26 導電膜
30 トランジスタ
30a トランジスタ
30b トランジスタ
31 基板
32 導電膜
33 ゲート絶縁膜
34 半導体膜
35 導電膜
36 導電膜
37 酸化物膜
38 領域
39a 領域
39b 領域
40 トランジスタ
40a トランジスタ
40b トランジスタ
41 基板
42 導電膜
43 ゲート絶縁膜
44 半導体膜
45 導電膜
46 導電膜
47 酸化物膜
48 領域
50 凸部
51 連結部
60 凸部
61 連結部
65 領域
71 配線
72 配線
80 順序回路
81 配線
82 配線
83 配線
84 配線
85 配線
91 端子
92 端子
93 端子
94 端子
95 端子
96 端子
97 端子
100 トランジスタ
111 基板
112 導電膜
113 ゲート絶縁膜
114 半導体膜
114a 酸化物半導体膜
114b 酸化物半導体膜
114c 酸化物半導体膜
115 導電膜
116 導電膜
117 酸化物膜
200 基板
201 導電膜
202 導電膜
203 ゲート絶縁膜
204 半導体膜
205 半導体膜
206 導電膜
207 導電膜
208 導電膜
209 酸化物膜
210 絶縁膜
211 絶縁膜
300 シフトレジスタ
301 トランジスタ
302 トランジスタ
303 トランジスタ
304 トランジスタ
305 トランジスタ
306 トランジスタ
307 トランジスタ
308 トランジスタ
309 トランジスタ
310 トランジスタ
311 トランジスタ
460 パネル
461 画素部
462 画素
463 走査線駆動回路
464 信号線駆動回路
465 液晶素子
466 トランジスタ
467 容量素子
470 トランジスタ
471 トランジスタ
472 容量素子
473 発光素子
5001 筐体
5002 筐体
5003 表示部
5004 表示部
5005 マイクロホン
5006 スピーカー
5007 操作キー
5008 スタイラス
5201 筐体
5202 表示部
5203 支持台
5401 筐体
5402 表示部
5403 キーボード
5404 ポインティングデバイス
5601 筐体
5602 筐体
5603 表示部
5604 表示部
5605 接続部
5606 操作キー
5801 筐体
5802 筐体
5803 表示部
5804 操作キー
5805 レンズ
5806 接続部
5901 筐体
5902 表示部
5903 カメラ
5904 スピーカー
5905 ボタン
5906 外部接続部
5907 マイク
Claims (4)
- 第1のトランジスタを有し、
前記第1のトランジスタは、第1の配線への第1の信号の供給を制御する機能を有し、
前記第1の配線は、画素に電気的に接続されており、
前記第1のトランジスタは、
ゲート電極と、
前記ゲート電極上の酸化物半導体膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第1の導電膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第2の導電膜と、
前記酸化物半導体膜上、前記第1の導電膜上、及び前記第2の導電膜上の金属酸化物膜と、を有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第1の領域を有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第2の領域を有し、
前記第1の導電膜は、前記第1の領域と前記第2の領域とを連結する第3の領域を有し、
前記第3の領域は、前記酸化物半導体膜と重ならず、
前記酸化物半導体膜は、チャネル幅方向において前記第1の領域及び前記第2の領域よりも幅の広い第4の領域を有し、
前記金属酸化物膜に含まれる一の金属元素は、前記酸化物半導体膜に含まれる一の金属元素と同じである半導体装置。 - 第1のトランジスタを有し、
前記第1のトランジスタは、第1の配線への第1の信号の供給を制御する機能を有し、
前記第1の配線は、画素に電気的に接続されており、
前記第1のトランジスタは、
ゲート電極と、
前記ゲート電極上の酸化物半導体膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第1の導電膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第2の導電膜と、
前記酸化物半導体膜上、前記第1の導電膜上、及び前記第2の導電膜上の金属酸化物膜と、を有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第1の領域を有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第2の領域を有し、
前記第1の導電膜は、前記第1の領域と前記第2の領域とを連結する第3の領域を有し、
前記第3の領域は、前記酸化物半導体膜と重ならず、
前記酸化物半導体膜は、チャネル幅方向において前記第1の領域及び前記第2の領域よりも幅の広い第4の領域を有し、
前記第2の導電膜は、前記酸化物半導体膜と重なる第5の領域を有し、
前記第5の領域は、前記第1の領域及び前記第2の領域よりも前記チャネル幅方向における幅が大きく、
前記金属酸化物膜に含まれる一の金属元素は、前記酸化物半導体膜に含まれる一の金属元素と同じである半導体装置。 - 第1のトランジスタ乃至第3のトランジスタを有し、
前記第1のトランジスタは、第1の配線への第1の信号の供給を制御する機能を有し、
前記第2のトランジスタは、第2の配線への前記第1の信号の供給を制御する機能を有し、
前記第3のトランジスタは、前記第1のトランジスタのゲート電極への第1の電位の供給を制御する機能と、前記第2のトランジスタのゲート電極への前記第1の電位の供給を制御する機能と、を有し、
前記第1の配線は、画素に電気的に接続されており、
前記第1のトランジスタ乃至前記第3のトランジスタは、
酸化物半導体膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第1の導電膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第2の導電膜と、
前記酸化物半導体膜上、前記第1の導電膜上、及び前記第2の導電膜上の金属酸化物膜と、をそれぞれ有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第1の領域を有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第2の領域を有し、
前記第1の導電膜は、前記第1の領域と前記第2の領域とを連結する第3の領域を有し、
前記第3の領域は、前記酸化物半導体膜と重ならず、
前記酸化物半導体膜は、チャネル幅方向において前記第1の領域及び前記第2の領域よりも幅の広い第4の領域を有し、
前記金属酸化物膜に含まれる一の金属元素は、前記酸化物半導体膜に含まれる一の金属元素と同じである半導体装置。 - 第1のトランジスタ乃至第3のトランジスタを有し、
前記第1のトランジスタは、第1の配線への第1の信号の供給を制御する機能を有し、
前記第2のトランジスタは、第2の配線への前記第1の信号の供給を制御する機能を有し、
前記第3のトランジスタは、前記第1のトランジスタのゲート電極への第1の電位の供給を制御する機能と、前記第2のトランジスタのゲート電極への前記第1の電位の供給を制御する機能と、を有し、
前記第1の配線は、画素に電気的に接続されており、
前記第1のトランジスタ乃至前記第3のトランジスタは、
酸化物半導体膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第1の導電膜と、
前記酸化物半導体膜上において前記酸化物半導体膜に電気的に接続されている第2の導電膜と、
前記酸化物半導体膜上、前記第1の導電膜上、及び前記第2の導電膜上の金属酸化物膜と、をそれぞれ有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第1の領域を有し、
前記第1の導電膜は、前記酸化物半導体膜と重なる第2の領域を有し、
前記第1の導電膜は、前記第1の領域と前記第2の領域とを連結する第3の領域を有し、
前記第3の領域は、前記酸化物半導体膜と重ならず、
前記酸化物半導体膜は、チャネル幅方向において前記第1の領域及び前記第2の領域よりも幅の広い第4の領域を有し、
前記第2の導電膜は、前記酸化物半導体膜と重なる第5の領域を有し、
前記第5の領域は、前記第1の領域及び前記第2の領域よりも前記チャネル幅方向における幅が大きく、
前記金属酸化物膜に含まれる一の金属元素は、前記酸化物半導体膜に含まれる一の金属元素と同じである半導体装置。
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