JP7328146B2 - 記憶装置及び電子機器 - Google Patents
記憶装置及び電子機器 Download PDFInfo
- Publication number
- JP7328146B2 JP7328146B2 JP2019540723A JP2019540723A JP7328146B2 JP 7328146 B2 JP7328146 B2 JP 7328146B2 JP 2019540723 A JP2019540723 A JP 2019540723A JP 2019540723 A JP2019540723 A JP 2019540723A JP 7328146 B2 JP7328146 B2 JP 7328146B2
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- Prior art keywords
- sense amplifier
- bit line
- transistor
- memory
- conductor
- Prior art date
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Classifications
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- 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
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- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/788—Field effect transistors with field effect produced by an insulated gate with floating gate
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Description
本実施の形態では、酸化物半導体記憶装置の一例として、DOSRAM(登録商標)について説明する。なお、「DOSRAM」の名称は、Dynamic Oxide Semiconductor Random Access Memoryに由来する。“DOSRAM”とは、メモリセルが、1T1C(1トランジスタ1容量)型セルであり、かつ書込みトランジスタがOSトランジスタである記憶装置のことである。
図1は、DOSRAMの構成例を示す機能ブロック図である。図1に示すDOSRAM100は、制御回路102、行回路104、列回路105、メモリセル(MC)及びセンスアンプ(SA)アレイ120を有する。行回路104はデコーダ111、ワード線ドライバ112、列セレクタ113、センスアンプドライバ114を有する。列回路105はグローバルセンスアンプブロック115、入出力(I/O)回路116を有する。
本実施の形態では、上掲の酸化物半導体記憶装置を有する電子部品、電子機器等について説明する。
本実施の形態では、DOSRAM100の積層構造例について説明する。図9は、代表的なブロック130の断面を示している。上掲したように、ブロック130において、センスアンプブロック131にローカルセルアレイ135が積層されている。なお、図9は、図3Aの回路図の断面図に対応する。
Claims (3)
- センスアンプブロックと、
前記センスアンプブロック上に積層されているメモリセルアレイとを有する記憶装置であって、
前記センスアンプブロックは、
ビット線と、
前記ビット線に電気的に接続されているセンスアンプとを有し、
前記メモリセルアレイは、第1の導電体と、第2の導電体と、メモリセルとを有し、
前記メモリセルは、
前記第1の導電体及び前記第2の導電体を介して前記ビット線に電気的に接続されている書込みトランジスタと、
前記書込みトランジスタに電気的に接続されている容量素子とを有し、
前記第1の導電体は、前記書込みトランジスタのチャネル形成領域を有する半導体層の下面に接する部分を有し、且つ前記第2の導電体の上方に配置され、
前記第2の導電体は、前記書込みトランジスタのバックゲートと同層に配置され、
前記第1の導電体は、前記バックゲートと前記半導体層の間に配置されたゲート絶縁層として機能する領域を有する絶縁層に埋め込まれている、記憶装置。 - 請求項1において、
前記書込みトランジスタの前記半導体層は、金属酸化物を有する記憶装置。 - 請求項1又は2に記載の記憶装置を有する電子機器。
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