JP2015079950A - 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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- JP2015079950A JP2015079950A JP2014184826A JP2014184826A JP2015079950A JP 2015079950 A JP2015079950 A JP 2015079950A JP 2014184826 A JP2014184826 A JP 2014184826A JP 2014184826 A JP2014184826 A JP 2014184826A JP 2015079950 A JP2015079950 A JP 2015079950A
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- oxide
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Images
Classifications
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- 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
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- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/24—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using capacitors
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/04—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
- G11C16/0466—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS]
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
- G11C16/3404—Convergence or correction of memory cell threshold voltages; Repair or recovery of overerased or overprogrammed cells
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- H—ELECTRICITY
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Abstract
【解決手段】半導体と、半導体に電気的に接するソース電極あるいはドレイン電極と、ゲート電極とゲート電極と半導体との間に設けられる電荷捕獲層とを有する複数の半導体装置において、150℃以上300℃以下で加熱しつつ、それぞれのゲート電極の電位をソース電極やドレイン電極よりも高くし、かつ、1秒以上保持することで、電荷捕獲層に電子を捕獲させることで、しきい値を増大させ、Icut電流を低減させる。この際、それぞれの半導体装置のゲート電極とソース電極やドレイン電極の電位差を異なるものとすることにより、それぞれの半導体装置のしきい値をそれぞれの目的に適合したものとする。
【選択図】図1
Description
本実施の形態では、半導体層と電荷捕獲層とゲート電極とを有する半導体装置の構成および動作原理、および、それを応用した回路について説明する。図1(A)は、半導体層101と電荷捕獲層102とゲート電極103を有する半導体装置である。電荷捕獲層102はゲート絶縁層を兼ねることができる。
本実施の形態では、実施の形態1で示したトランジスタ等に適用できる半導体装置について図面を用いて説明する。なお、以下では、主として、しきい値補正用のゲート電極が基板と半導体層の間に存在するトランジスタについて説明するが、しきい値補正用のゲート電極と基板の間に半導体層が存在するトランジスタであってもよい。
本実施の形態では、実施の形態2で説明した図13に示すトランジスタ450の作製方法について、図16および図17を用いて説明する。
本実施の形態では、実施の形態1で説明したトランジスタ等に適用できるプレナー構造のトランジスタについて説明する。
上記で説明した半導体装置は、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、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、携帯データ端末、電子書籍、ビデオカメラ、デジタルスチルカメラ等のカメラ、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、プリンタ複合機、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19に示す。
102 電荷捕獲層
102a 第1の絶縁層
102b 第2の絶縁層
102c 第3の絶縁層
102d 導電層
102e 絶縁体
103 ゲート電極
104 ゲート絶縁層
105 ゲート電極
106 電子捕獲準位
107 電子
108 曲線
109 曲線
110 トランジスタ
111 容量素子
120 画素
121 トランジスタ
122 トランジスタ
123 発光素子
124 電源線
130 表示装置
131 ドライバ領域
132 表示領域
133 FPC
140 マイクロプロセッサ
141 論理ユニット
142 レジスタ
143 一次キャッシュメモリ
144 二次キャッシュメモリ
145 I/O回路
150 記憶素子
151a スイッチ
151b スイッチ
151c スイッチ
152a インバータ
152b インバータ
152c インバータ
153 トランジスタ
154 容量素子
155 記憶素子
156a スイッチ
156b スイッチ
156c スイッチ
157a インバータ
157b インバータ
157c インバータ
158 トランジスタ
159 容量素子
160 記憶素子
161a トランジスタ
161b トランジスタ
162a インバータ
162b インバータ
163a トランジスタ
163b トランジスタ
164a 容量素子
164b 容量素子
165 記憶素子
166a トランジスタ
166b トランジスタ
167a インバータ
167b インバータ
168a トランジスタ
168b トランジスタ
169a 容量素子
169b 容量素子
170 記憶素子
171 トランジスタ
172 トランジスタ
173 容量素子
175 記憶素子
176 トランジスタ
177 トランジスタ
178 容量素子
180 記憶素子
181 トランジスタ
182 トランジスタ
183 トランジスタ
184 容量素子
185 記憶素子
186 トランジスタ
187 トランジスタ
188 トランジスタ
189 容量素子
190 半導体チップ
191 パッド
191a パッド
191b パッド
191c パッド
192 デバイス領域
193 リードフレーム
194 ボンディングワイヤ
195 リード
195a リード
195b リード
195c リード
400 基板
401 ゲート電極
402 下地絶縁層
402a 第1の絶縁層
402b 第2の絶縁層
402c 第3の絶縁層
403c 酸化物半導体層
404 多層半導体層
404a 酸化物半導体層
404b 酸化物半導体層
404c 酸化物半導体層
406a ソース電極
406b ドレイン電極
407 絶縁層
408 ゲート絶縁層
408a 第1の絶縁層
408b 第2の絶縁層
409 導電層
410 ゲート電極
412 酸化物絶縁層
450 トランジスタ
460 トランジスタ
470 トランジスタ
501 筐体
502 筐体
503 表示部
504 表示部
505 マイクロフォン
506 スピーカー
507 操作キー
508 スタイラス
511 筐体
512 筐体
513 表示部
514 表示部
515 接続部
516 操作キー
521 筐体
522 表示部
523 キーボード
524 ポインティングデバイス
531 筐体
532 冷蔵室用扉
533 冷凍室用扉
541 筐体
542 筐体
543 表示部
544 操作キー
545 レンズ
546 接続部
551 車体
552 車輪
553 ダッシュボード
554 ライト
BL ビット線
BL_a ビット線
BL_b ビット線
IN 信号
OUT 信号
Pm データ線
Qn 選択線
Rm しきい値補正用配線
Rn しきい値補正用配線
RWL 読み出しワード線
SIG1 信号
SIG2 信号
SIG3 信号
SIG4 信号
SIG5 信号
SL ソース線
Sn しきい値補正用配線
TC しきい値補正用配線
WE バックアップ制御線
WL ワード線
WWL 書き込みワード線
Claims (8)
- 第1の半導体装置と第2の半導体装置とを有し、
前記第1の半導体装置と第2の半導体装置のそれぞれは、
第1の半導体と、前記第1の半導体に電気的に接する電極と、第1のゲート電極と、前記第1のゲート電極と前記第1の半導体との間に設けられる電荷捕獲層とを有し、
150℃以上300℃以下で、前記第1の半導体装置の前記第1のゲート電極と前記電極の間の第1の電位差と、前記第2の半導体装置の前記第1のゲート電極と前記電極の間の第2の電位差が異なる状態で、1分以上1時間以下保持することにより、前記第1の半導体装置と前記第2の半導体装置のしきい値を互いに異なるものとする処理をおこなうことを特徴とする半導体装置の作製方法。 - 請求項1において、前記電荷捕獲層は、酸化ハフニウム、酸化アルミニウム、アルミニウムシリケートのいずれか一を含むことを特徴とする半導体装置の作製方法。
- 前記電極が、ソース電極あるいはドレイン電極のいずれか一方である請求項1または2に記載の半導体装置の作製方法。
- 前記第1の半導体装置及び前記第2の半導体装置はそれぞれ、前記第1の半導体を挟む第2の半導体および第3の半導体を有し、前記第3の半導体は、前記第1の半導体と前記電荷捕獲層の間にある請求項1乃至3のいずれか一項に記載の半導体装置の作製方法。
- 前記第1の電位差が前記第2の電位差よりも大きく、前記処理後の前記第1の半導体装置のしきい値が前記処理後の前記第2の半導体装置のしきい値よりも大きいことを特徴とする請求項1乃至4のいずれか一項に記載の半導体装置の作製方法。
- さらに、150℃以上300℃以下で、前記第1の半導体装置の前記第1のゲート電極と前記電極の間の電位差と、前記第2の半導体装置の前記第1のゲート電極と前記電極の間の電位差が同じ状態で、1分以上1時間以下保持する過程を有する請求項1乃至5のいずれか一項に記載の半導体装置の作製方法。
- 前記第1の半導体装置の前記第1のゲート電極および前記第2の半導体装置の前記第1のゲート電極に印加される電位は、前記第1の半導体装置及び前記第2の半導体装置で使用される最高電位よりも低いことを特徴とする請求項1乃至6のいずれか一項に記載の半導体装置の作製方法。
- 前記第1の半導体装置および前記第2の半導体装置のそれぞれが、さらに、第2のゲート電極を有し、
前記第2のゲート電極と前記電荷捕獲層が、前記第1の半導体層をはさむことを特徴とする請求項1乃至7のいずれか一項に記載の半導体装置の作製方法。
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KR20170072496A (ko) * | 2015-12-17 | 2017-06-27 | 삼성전자주식회사 | 수직형 메모리 소자 및 그 형성 방법 |
JP2017112363A (ja) * | 2015-12-17 | 2017-06-22 | 三星電子株式会社Samsung Electronics Co.,Ltd. | 垂直型メモリ素子 |
KR102508897B1 (ko) | 2015-12-17 | 2023-03-10 | 삼성전자주식회사 | 수직형 메모리 소자 및 그 형성 방법 |
JP2017120896A (ja) * | 2015-12-25 | 2017-07-06 | 株式会社半導体エネルギー研究所 | 半導体装置及びその作製方法 |
JP2017120905A (ja) * | 2015-12-29 | 2017-07-06 | 株式会社半導体エネルギー研究所 | トランジスタおよび半導体装置 |
JP2023015175A (ja) * | 2017-11-24 | 2023-01-31 | 株式会社半導体エネルギー研究所 | 半導体装置 |
JP7504964B2 (ja) | 2017-11-24 | 2024-06-24 | 株式会社半導体エネルギー研究所 | 半導体装置 |
JP7561560B2 (ja) | 2020-09-29 | 2024-10-04 | ラピスセミコンダクタ株式会社 | 半導体装置、および半導体装置の製造方法 |
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