JP2013533628A - 3次元メモリおよびその形成方法 - Google Patents
3次元メモリおよびその形成方法 Download PDFInfo
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Abstract
【選択図】図3
Description
本特許出願は、参照により本明細書に組み込まれる、2010年6月28日出願の米国特許出願第12/825,211号の優先権の利益を主張するものである。
図31は、本発明の一実施形態による、図30のメモリデバイス3000の一部分の3D視図を示す。図31に示すように、データ線251、252、およびデータ線253は、メモリセル210、211、およびメモリセル212の上方に配置され、共通ソース3070は、メモリセル210、211、およびメモリセル212の下方に配置されて、基材3101に結合される。基材3101は、p型シリコンなどの、半導体材料を含み得る。
Claims (34)
- メモリデバイスの第1のデバイスレベル内に配置される、第1のメモリセルと、
前記メモリデバイスの第2のデバイスレベル内に配置される、第2のメモリセルと、
前記第1のメモリセルへのアクセスを制御するための、前記第1のデバイスレベル内に形成される第1の制御ゲートであって、前記第1のメモリセルのそれぞれが、前記第1の制御ゲートの空洞内に形成されるメモリ素子を含む、第1の制御ゲートと、
前記第2のメモリセルへのアクセスを制御するための、前記第2のデバイスレベル内に形成される第2の制御ゲートであって、前記第2のメモリセルのそれぞれが、前記第2の制御ゲートの空洞内に形成されるメモリ素子を含む、第2の制御ゲートと、
を含む、装置。 - 前記第1および第2のメモリセルのそれぞれが、第1の方向で配置構成される複数のメモリセル、および第2の方向で配置構成される複数のメモリセルを含み、
共通ソースと、
前記共通ソースおよび前記メモリセルに、導電材料を通じて選択的に結合されるように構成される、データ線と、を更に含み、前記導電材料が、前記第1および第2のメモリセルを、第3の方向で貫通して延び、前記第3の方向が、前記第1および第2の方向と実質的に垂直である、請求項1に記載の装置。 - 前記共通ソースが、前記第1および第2のメモリセルと基材との間にあるように、前記共通ソースが、前記メモリデバイスの前記基材の上に形成されることにより、消去動作の間に、前記第1および第2のメモリセルの少なくとも一方の前記メモリ素子からの電子が、前記共通ソースへ移動することが可能になる、請求項2に記載の装置。
- 前記第1および第2のメモリセルが、前記共通ソースと基材との間にあるように、前記共通ソースが、前記メモリデバイスの前記基材の上に形成される、請求項2に記載の装置。
- 前記第1のメモリセルが、前記第2のメモリセルと、実質的に垂直に位置合わせされる、請求項1に記載の装置。
- 前記第1のメモリセルのそれぞれの前記メモリ素子が、前記第2のメモリセルのうちの1つの前記メモリ素子と、実質的に垂直に位置合わせされる、請求項1に記載の装置。
- 前記メモリデバイスのメモリ動作の間、前記第1および第2のメモリセルに関連するデータ線に、前記第1および第2のメモリセルを選択的に結合させるための、トランジスタを更に含み、前記トランジスタの少なくとも1つが、ダブルゲートを含む、請求項1に記載の装置。
- 前記メモリデバイスのメモリ動作の間、前記第1および第2のメモリセルに関連するデータ線に、前記第1および第2のメモリセルを選択的に結合させるための、トランジスタを更に含み、前記トランジスタの少なくとも1つが、取り囲まれたゲートを含む、請求項1に記載の装置。
- リング形状を有する第1のメモリ素子を含む、第1の不揮発性メモリセルと、
リング形状を有する第2のメモリ素子を含む、第2の不揮発性メモリセルと、
前記第1および第2のメモリ素子を貫通して延びる導電材料と、
を含む、装置。 - 前記第1のメモリセルにアクセスするための制御ゲートとして動作するように構成される、第1の追加的導電材料であって、前記第1のメモリ素子および前記第1の追加的導電材料が、前記第1および第2のメモリセルが配置されるメモリデバイスの、第1のデバイスレベル内に配置される、第1の追加的導電材料と、
前記第2のメモリセルにアクセスするための制御ゲートとして動作するように構成される、第2の追加的導電材料であって、前記第2のメモリ素子および前記第2の追加的導電材料が、前記メモリデバイスの、第2のデバイスレベル内に配置される、第2の追加的導電材料と、
を更に含む、請求項9に記載の装置。 - 前記メモリセルのそれぞれが、前記対応するメモリ素子と前記導電材料との間に、第1の誘電体を更に含む、請求項10に記載の装置。
- 前記メモリセルのそれぞれが、前記対応するメモリ素子と前記対応する追加的導電材料との間に、第2の誘電体を更に含む、請求項11に記載の装置。
- 前記第1および第2のメモリセル内に格納された情報の値を表す信号を搬送するための、基材の上のデータ線を更に含み、前記データ線が、前記基材と前記第1のメモリセルとの間に配置される、請求項9に記載の装置。
- 前記第1および第2のメモリセル内に格納された情報の値を表す信号を搬送するための、基材の上のデータ線を更に含み、前記第1および第2のメモリセルが、前記基材と前記データ線との間に配置される、請求項9に記載の装置。
- メモリデバイスの第1のデバイスレベル内に配置され、第1の側壁を有する第1の空洞を含む、第1の導電材料と、
前記メモリデバイスの第2のデバイスレベル内に配置され、第2の側壁を有する第2の空洞を含む、第2の導電材料と、
前記第1の側壁および前記第2の側壁上に形成される、第1の誘電体と、
前記第1の空洞内に配置され、前記第1の誘電体の第1の部分によって、前記第1の導電材料から電気的に絶縁される、第1のメモリ素子と、
前記第2の空洞内に配置され、前記第1の誘電体の第2の部分によって、前記第2の導電材料から電気的に絶縁される、第2のメモリ素子と、
前記第1のメモリ素子の側面上、および前記第2のメモリ素子の側面上に形成される、第2の誘電体と、
前記第1のデバイスレベルから前記第2のデバイスレベルへ延び、前記第2の誘電体の少なくとも対応する部分によって、前記第1および第2のメモリ素子から電気的に絶縁されるように、前記第1および第2のメモリ素子に対向する、導電チャネルと、
を含む、装置。 - 前記第1および第2のメモリ素子が、ポリシリコンを含む、請求項15に記載の装置。
- 前記第1および第2のメモリ素子が、誘電材料を含む、請求項15に記載の装置。
- 前記誘電材料が、シリコン窒化物を含む、請求項17に記載の装置。
- 前記第1の導電材料と前記第2の導電材料との間に、誘電材料を更に含む、請求項15に記載の装置。
- 基材と、
前記導電チャネルに選択的に結合されるように構成され、前記第2の導電材料と前記基材との間に配置される、データ線と、
を更に含む、請求項15に記載の装置。 - 基材と、
前記導電チャネルに選択的に結合されるように構成されるデータ線であって、前記第1および第2のメモリ素子が、前記データ線と前記基材との間に配置される、データ線と、
を更に含む、請求項15に記載の装置。 - リング形状を有する第1のメモリ素子を含む、第1の不揮発性メモリセルを形成する工程と、
リング形状を有する第2のメモリ素子を含む、第2の不揮発性メモリセルを形成する工程と、
前記第1および第2のメモリ素子を貫通して延びる導電材料を形成する工程と、
を含む、方法。 - 前記第1のメモリセルを形成する工程が、第1の導電材料内に第1の空洞を形成する工程を含み、前記第1のメモリ素子が、前記第1の空洞内に形成され、前記第2のメモリセルを形成する工程が、第2の導電材料内に第2の空洞を形成する工程を含み、前記第2のメモリ素子が、前記第2の空洞内に形成される、請求項22に記載の方法。
- 前記第1の空洞が、前記第2の空洞の上に実質的に位置合わせされる、請求項23に記載の方法。
- 基材の上にデータ線を形成する工程を更に含み、前記データ線が、前記基材と前記第1および第2のメモリセルとの間に配置される、請求項22に記載の方法。
- 基材の上にデータ線を形成する工程を更に含み、前記第1および第2のメモリセルが、前記基材と前記データ線との間に配置される、請求項22に記載の方法。
- 導電材料の層および誘電材料の層を、前記導電材料の層が前記誘電材料の層によって互いに電気的に絶縁されるように形成する工程と、
前記導電材料の層内のそれぞれに、空洞を形成する工程と、
前記空洞内のそれぞれに、メモリ素子を形成する工程と、
を含む、方法。 - 前記導電材料の層のそれぞれが、2つの前記誘電材料の層の間にあり、少なくとも1つの前記導電材料の層が、2つの前記導電材料の層の間にある、請求項27に記載の方法。
- 前記メモリ素子が、ポリシリコンを含む、請求項27に記載の方法。
- 前記メモリ素子が、誘電材料を含む、請求項27に記載の方法。
- 前記空洞を形成する工程が、
前記導電材料の層内に、初期の空洞を形成する工程と、
前記初期の空洞のサイズを拡大して、前記導電材料の層内のそれぞれに、前記空洞を形成する工程と、
を含む、請求項27に記載の方法。 - 前記導電材料の層および前記誘電材料の層を貫通する開口部を形成して、前記初期の空洞を形成する工程を更に含む、請求項31に記載の方法。
- 前記開口部が形成される際に、第2の空洞が、前記誘電材料の層内のそれぞれに形成され、前記初期の空洞の前記サイズが拡大される際に、前記第2の空洞のサイズが、実質的に変化せずに維持される、請求項32に記載の方法。
- 前記第2の空洞のそれぞれ、および前記初期の空洞のそれぞれが、実質的に同じ直径を有する、請求項33に記載の方法。
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