JP2004507091A5 - - Google Patents

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JP2004507091A5
JP2004507091A5 JP2002520307A JP2002520307A JP2004507091A5 JP 2004507091 A5 JP2004507091 A5 JP 2004507091A5 JP 2002520307 A JP2002520307 A JP 2002520307A JP 2002520307 A JP2002520307 A JP 2002520307A JP 2004507091 A5 JP2004507091 A5 JP 2004507091A5
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Priority claimed from PCT/US2001/025092 external-priority patent/WO2002015277A2/en
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【特許請求の範囲】
【請求項1】
メモリデバイスであって、
基板の第1平面の上またはその上方に形成された第1の入力/出力導電層と、
第2の入力/出力導電層と、
第1および第2の入力/出力導電層の間で、これらの投影上の交差点に形成された半導体領域と、
電荷記憶媒体とを有し、
電荷記憶媒体に蓄積される電荷が、第1および第2の入力/出力導電層の間に流れる電流量に影響を与えることを特徴とするメモリデバイス。
【請求項2】
請求項1に記載のメモリデバイスであって、
電荷記憶媒体は、第1および第2の入力/出力導電層の間で、これらの投影上の交差点に形成されることを特徴とするメモリデバイス。
【請求項3】
請求項2に記載のメモリデバイスであって、
電荷記憶媒体は、半導体領域上に直接形成されることを特徴とするメモリデバイス。
【請求項4】
請求項1に記載のメモリデバイスであって、
電荷記憶媒体は、半導体領域に隣接して形成されることを特徴とするメモリデバイス。
【請求項5】
請求項4に記載のメモリデバイスであって、
電荷記憶媒体に隣接して形成される制御ゲートをさらに有することを特徴とするメモリデバイス。
【請求項6】
請求項1に記載のメモリデバイスであって、
電流は、半導体領域を基板の平面に対して垂直な方向に流れることを特徴とするメモリデバイス。
【請求項7】
請求項1に記載のメモリデバイスであって、
半導体領域は、ドープされたシリコンであることを特徴とするメモリデバイス。
【請求項8】
メモリデバイスであって、
基板の第1平面の上またはその上方に形成された第1の入力/出力導電層と、
第1の入力/出力導電層の上方に形成され、第1の入力/出力導電層との間で投影された交差点を有する第2の入力/出力導電層と、
第1および第2の入力/出力導電層の間に形成され、第1および第2の入力/出力導電層の交差点に対して直接的に位置合わせされたシリコン本体部と、
電荷記憶媒体とを有し
読み出し電流は、第1および第2の入力/出力導電層の間に形成されたシリコン本体部を、基板の表面に対して垂直な方向に流れ、
電荷記憶媒体に蓄積される電荷は、第1および第2の入力/出力導電層の間に印加された所与の電圧に対する、第1および第2の入力/出力導電層の間に流れる読み出し電流の量に影響を与えることを特徴とするメモリデバイス。
【請求項9】
請求項8に記載のメモリデバイスであって、
電荷記憶媒体は、シリコン本体部の上に、第1および第2の入力/出力導電層の交差点に対して直接的に位置合わせされて形成されることを特徴とするメモリデバイス。
【請求項10】
請求項8に記載のメモリデバイスであって、
電荷記憶媒体は、シリコン本体部に隣接して形成されることを特徴とするメモリデバイス。
【請求項11】
請求項8に記載のメモリデバイスであって、
電荷記憶媒体に隣接して形成される制御ゲートをさらに有することを特徴とするメモリデバイス。
【請求項12】
メモリデバイスであって、
基板の第1平面の上またはその上方に形成された第1の入力/出力導電層と、
第1の入力/出力導電層の上方に形成された第2の入力/出力導電層と、
第2の入力/出力導電層の上方に形成された第3の入力/出力導電層と、
第1および第2の入力/出力導電層の間で、これらの投影上の交差点に形成された第1の半導体領域と、
第2および第3の入力/出力導電層の間で、これらの投影上の交差点に形成された第2の半導体領域と、
第1および第2の入力/出力導電層の間に流れる電流の量に影響を与える第1の電荷記憶媒体とを有することを特徴とするメモリデバイス。
【請求項13】
メモリセルであって、
第1領域および第2領域を含むダイオードと、
電荷記憶領域と、
電荷記憶領域に隣接して配置された絶縁領域と、
第1領域に対する第1のコンタクトと、
第2のコンタクトとを備え、
第1および第2のコンタクトの間に印加された所定の電圧により、ダイオード、絶縁領域、および電荷記憶領域に流れることを特徴とするメモリセル。
【請求項14】
請求項13に記載のメモリセルであって、
第2のコンタクト、および第1の絶縁層に対向する電荷記憶領域に隣接して配置された第2の絶縁層をさらに有することを特徴とするメモリセル。
【請求項15】
請求項13に記載のメモリセルであって、
絶縁領域は、酸化領域であることを特徴とするメモリセル。
【請求項16】
請求項13に記載のメモリセルであって、
電荷記憶領域は、窒化化合物であることを特徴とするメモリセル。
【請求項17】
請求項16に記載のメモリセルであって、
化合物は、酸素を含むことを特徴とするメモリセル。
【請求項18】
請求項16に記載のメモリセルであって、
化合物は、シリコンを含むことを特徴とするメモリセル。
【請求項19】
請求項16に記載のメモリセルであって、
電荷記憶領域は、アルミナを含むことを特徴とするメモリセル。
【請求項20】
請求項13に記載のメモリセルであって、
ダイオードは、ドープされた基板領域を有することを特徴とするメモリセル。
【請求項21】
請求項14または15に記載のメモリセルであって、
ダイオードは、基板の上方に配置された層を有することを特徴とするメモリセル。
【請求項22】
請求項15に記載のメモリセルであって、
酸化領域は、約1ないし5nmの膜厚を有することを特徴とするメモリセル。
【請求項23】
請求項22に記載のメモリセルであって、
酸化領域は、約2ないし3nmの膜厚を有することを特徴とするメモリセル。
【請求項24】
不揮発性の読み出し・書き込みメモリセルであって、
nドープ領域と、
pドープ領域と、
nドープ領域とpドープ領域の間に配置された記憶要素と、
nドープ領域、pドープ領域、および記憶要素に電流を流すための導電部とを有することを特徴とするメモリセル。
【請求項25】
請求項24に記載のメモリセルであって、
記憶要素は、第1の酸化領域を有することを特徴とするメモリセル。
【請求項26】
請求項25に記載のメモリセルであって、
記憶要素は、第2の酸化領域を有することを特徴とするメモリセル。
【請求項27】
請求項25に記載のメモリセルであって、
記憶要素は、窒素を含む領域を有することを特徴とするメモリセル。
【請求項28】
請求項27に記載のメモリセルであって、
記憶要素は、第2の酸化領域を有することを特徴とするメモリセル。
【請求項29】
請求項24に記載のメモリセルであって、
記憶要素は、少なくとも一方のドープ領域と電気的に直接接触していることを特徴とするメモリセル。
【請求項30】
請求項24に記載のメモリセルであって、
記憶要素は、シリコンを含むことを特徴とするメモリセル。
【請求項31】
請求項25に記載のメモリセルであって、
記憶要素は、アルミナを含むことを特徴とするメモリセル。
【請求項32】
請求項24に記載のメモリセルであって、
少なくとも一方のドープ領域は、基板内に配置されることを特徴とするメモリセル。
【請求項33】
請求項24に記載のメモリセルであって、
少なくとも一方のドープ領域は、基板の上方に配置されることを特徴とするメモリセル。
【請求項34】
メモリセルを動作させる方法であって、
セルをプログラムするために領域内に電荷を捕獲するステップと、
データをセルから読み出す際、電流を領域に流すステップとを有することを特徴とする方法。
【請求項35】
請求項34に記載の方法であって、
電流を流すステップは、セルをプログラムし、読み出すために、電流を第1の方向に流すステップを含むことを特徴とする方法。
【請求項36】
請求項34に記載の方法であって、
電流を流すステップは、セルを消去するために、電流を第2の方向に流すステップをさらに含むことを特徴とする方法。
【請求項37】
請求項34に記載の方法であって、
捕獲するステップは、電流を記憶要素に第1の方向で流すステップを含むことを特徴とする方法。
【請求項38】
請求項34に記載の方法であって、
消去するステップは、電流を記憶要素に第2の方向で流すステップを含むことを特徴とする方法。
【請求項39】
ダイオードおよび酸化領域を有し、ダイオードに順電圧を印加するとき負性抵抗特性を呈する構造体において、
電荷を捕獲するための記憶領域が、酸化領域に隣接して配置されることにより、ダイオードおよび酸化領域を流れる電流が、記憶領域を流れることを特徴とする改善された構造体。
【請求項40】
請求項39に記載の構造体であって、
記憶領域は、窒素を含む化合物を有することを特徴とする構造体。
【請求項41】
請求項40に記載の構造体であって、
化合物は、酸素を含むことを特徴とする構造体。
【請求項42】
請求項41に記載の構造体であって、
化合物は、シリコンを含むことを特徴とする構造体。
【請求項43】
請求項39に記載の構造体であって、
記憶領域は、アルミナを含むことを特徴とする構造体。
【請求項44】
メモリセルアレイであって、
少なくとも1つの半導体領域と、電荷を捕獲するための記憶領域とを有する複数のセルと、
半導体領域と記憶領域に流れる電流を制御するための制御手段とを有することを特徴とするメモリセルアレイ。
【請求項45】
請求項44に記載のアレイであって、
制御手段は、セル内に配置されることを特徴とするアレイ。
【請求項46】
請求項44に記載のアレイであって、
少なくとも1つの半導体領域は、n型であることを特徴とするアレイ。
【請求項47】
請求項46に記載のアレイであって、
制御手段は、p型半導体領域を有し、n型半導体領域に隣接して配置されることを特徴とするアレイ。
【請求項48】
請求項47に記載のアレイであって、
記憶手段は、酸化領域を有することを特徴とするアレイ。
【請求項49】
請求項48に記載のアレイであって、
記憶手段は、窒素化合物を含むことを特徴とするアレイ。
【請求項50】
請求項44に記載のアレイであって、
制御手段は、セルの外部に配置されることを特徴とするアレイ。
【請求項51】
請求項44に記載のアレイであって、
セルの半導体領域は、基板内に配置されることを特徴とするアレイ。
【請求項52】
請求項44に記載のアレイであって、
セルの半導体領域は、ポリシリコンから形成されることを特徴とするアレイ。
【請求項53】
請求項47に記載のアレイであって、
制御手段は、n型領域を含むnチャンネル電界効果型トランジスタを有することを特徴とするアレイ。
【請求項54】
基板の上方に形成され、2以上のNに対してN階層を有するメモリアレイであって、
各階層は、
基板に平行な第1平面内にある第1の離間した導電層と、
第1平面の上方にあって基板に平行な第2平面内にある第2の離間した導電層と、第1および第2の導電層のそれぞれの間に配置された複数のセルとを有し、
各セルは、
一方向において、電流をより容易に導通させる支配因子と、
第1および第2酸化領域と、その間にある記憶領域とを含む記憶積層物とを有し、
第1の導電層からの電流が、第2の導電層に達するまで、支配因子、第1酸化領域、記憶領域、および第2酸化領域を流れるように、支配因子と記憶積層物が第1および第2の導電層の間に配置されることを特徴とするメモリアレイ。
【請求項55】
請求項54に記載のメモリアレイであって、
(N−1)階層にある第2の導電層の上方および下方にあるセルが、この第2の導電層を共有することを特徴とするメモリアレイ。
【請求項56】
請求項54に記載のメモリアレイであって、
支配因子は、p型領域とn型領域を有し、
記憶積層物は、少なくともn型ドープ領域と接触していることを特徴とするメモリアレイ。
【請求項57】
基板の上方に配置された、複数階層を有する3次元メモリアレイにおいて、各階層は非線型部品を有し、
電荷を捕獲するための酸化領域の間に配置された記憶領域を含む、各非線型部品に関連する記憶積層物を備え、
非線型部品に流れる電流が、酸化領域、記憶領域、および他方の酸化領域に流れることを特徴とする改善メモリアレイ。
【請求項58】
請求項57に記載の改善メモリアレイであって、
第1の方向に第1の所定強度の電流を流すことにより、電荷を記憶領域内に捕獲することを特徴とする改善メモリアレイ。
【請求項59】
請求項58に記載の改善メモリアレイであって、
記憶領域に捕獲された電荷は、第2の所定強度の電流より小さい電流を第1の方向に流すことにより検出され、
第2の所定強度は、第1の所定強度より小さいことを特徴とする改善メモリアレイ。
【請求項60】
請求項59に記載の改善メモリアレイであって、
捕獲された電荷は、第1の方向とは反対の方向の電流を記憶領域に流すことにより中和させることを特徴とする改善メモリアレイ。
【請求項61】
請求項59に記載の改善メモリアレイであって、
電流が第1の方向に流れるとき、ダイオードは順方向バイアスが印加されることを特徴とする改善メモリアレイ。
【請求項62】
請求項59に記載の改善メモリアレイであって、
記憶領域は、窒素化合物を含むことを特徴とする改善メモリアレイ。
【請求項63】
請求項59に記載の改善メモリアレイであって、
ダイオードは、一方の酸化領域に隣接したn型半導体領域を有することを特徴とする改善メモリアレイ。
【請求項64】
複数のデバイス階層を有する3次元半導体デバイスであって、各階層は、
半導体活性領域と、
電荷記憶領域と、
第1の電極と、
第2の電極とを有し、
半導体活性領域の第1の側面は、第1および第2の電極の一方が有する第1の側面に対して位置合わせされることを特徴とする半導体デバイス。
【請求項65】
請求項64に記載の半導体デバイスであって、
半導体活性領域の第2の側面は、第1および第2の電極の他方が有する第2の側面に対して位置合わせされることを特徴とする半導体デバイス。
【請求項66】
複数のデバイス階層を有する3次元半導体デバイスの製造方法であって、各デバイス階層の製造方法は、
半導体活性領域を形成するステップと、
電荷記憶領域を形成するステップと、
第1の電極を形成するステップと、
第2の電極を形成するステップと、
半導体活性領域および第1の電極の少なくとも2つの側面を、同じフォトリソグラフィステップでパターン形成するステップとを有することを特徴とする製造方法。
【請求項67】
電界効果型トランジスタであって、
ソースと、
ドレインと、
チャンネルと、
ゲートと、
ゲートおよびチャンネルの間にある少なくとも1層の絶縁層と、
ソース−ドレイン−チャンネルの方向に対して実質的に平行に延び、ゲートと接触し、ゲートに対して自己整合されたゲートラインとを備えたことを特徴とするトランジスタ。
【請求項68】
請求項67に記載のトランジスタであって、
ソース、ドレイン、およびチャンネルは、中間絶縁層の上方にポリシリコン活性層として形成されたことを特徴とするトランジスタ。
【請求項69】
請求項68に記載のトランジスタであって、
トランジスタは、EEPROMを有し、
ゲートは、制御ゲートを有し、
少なくとも1層の絶縁層は、制御ゲートおよびチャンネルの間の電荷記憶領域に配置されたことを特徴とするトランジスタ。
【請求項70】
請求項69に記載のトランジスタであって、
電荷記憶領域は、ONO誘電膜、または導電性ナノ結晶を含む絶縁層を有することを特徴とするトランジスタ。
【請求項71】
請求項69に記載のトランジスタであって、
電荷記憶領域は、
チャンネルの上方にあるトンネル誘電層と、
トンネル誘電層の上方にあるフローティングゲートと、
フローティングゲートの上方にある制御ゲートとを有することを特徴とするトランジスタ。
【請求項72】
請求項69に記載のトランジスタであって、
ゲート側壁に隣接して配置され、ゲートとほぼ同じ高さを有する側壁スペーサと、
側壁スペーサに隣接し、ソース領域およびドレイン領域の上方に配置され、側壁スペーサとほぼ同じ高さを有する中間絶縁層とをさらに有することを特徴とするトランジスタ。
【請求項73】
請求項72に記載のトランジスタであって、
ゲートラインは、側壁スペーサと中間絶縁層の上方に配置され、
ゲートラインは、側壁スペーサ間の開口部を介してゲートと接触することを特徴とするトランジスタ。
【請求項74】
請求項73に記載のトランジスタであって、
ソース領域と接触する第1のビットラインと、
ドレイン領域と接触する第2のビットラインとを有し、
第1および第2のビットラインは、中間絶縁層の下方に配置され、ソース−ドレイン−チャンネルの方向に対して実質的に垂直な方向に延びることを特徴とするトランジスタ。
【請求項75】
請求項70に記載のトランジスタであって、
ゲートは、
電荷記憶領域と接触する第1部分と、
第1部分の上方にある第2部分と、
第1部分と第2部分は、個別に配置された層からなることを特徴とするトランジスタ。
【請求項76】
請求項72に記載のトランジスタであって、
ゲートラインは、2つのポリシリコン層の間にシリサイド層を含むワードラインを有し、
ゲートラインは、中間絶縁層および側壁スペーサの上側部分の上に直接配置されることを特徴とするトランジスタ。
【請求項77】
請求項69に記載のトランジスタであって、
ゲートラインは、チャンネル領域および電荷記憶領域に対して自己整合されたワードラインを有することを特徴とするトランジスタ。
【請求項78】
3次元不揮発性デバイスアレイであって、
垂直方向に分離された複数のデバイス階層であって、各デバイス階層は、チャンネル領域、ソース領域、およびドレイン領域をそれぞれ含むTFT EEPROMのアレイと、チャンネル領域に隣接した電荷記憶領域とを有するデバイス階層と、
各デバイス階層において、TFT EEPROMのソース領域またはドレイン領域と接触する複数のビットライン列と、
各デバイス階層における、複数のワードライン行と、
デバイス階層間に配置された少なくとも1層の中間絶縁層とを備えることを特徴とするアレイ。
【請求項79】
請求項78に記載のアレイであって、
電荷記憶領域と接触する第1部分と、
第1部分の上方にある第2部分と、
第1部分と第2部分が個別に配置された層を有することを特徴とするアレイ。
【請求項80】
請求項78に記載のアレイであって、
アレイの第1のデバイス階層の下方にある半導体基板内に配置された周辺回路に、ワードラインおよびビットラインを接続するワードラインコンタクトおよびビットラインコンタクトをさらに有することを特徴とするアレイ。
【請求項81】
請求項80に記載のアレイであって、
ワードラインコンタクトおよびビットラインコンタクトは、複数のデバイス階層に跨って延びることを特徴とするアレイ。
【請求項82】
請求項78に記載のアレイであって、
各メモリセルは、TFT EEPROMを有し、
1ビット当たりの各メモリセルサイズは、Fを最小フィーチャサイズ、Nを1より大きい3次元のデバイス階層数としたとき、約(2F)/Nであることを特徴とするアレイ。
【請求項83】
不揮発性メモリセルアレイであって、
各メモリセルは、半導体デバイスを有し、
各メモリセルの1ビット当たりのセルサイズは、Fが最小フィーチャサイズで、Nが1以上の第3の方向におけるデバイス階層数であるとき、約2F/Nであることを特徴とするアレイ。
【請求項84】
請求項83に記載のアレイであって、
アレイは、Nが1より大きく、垂直方向に分離された複数のデバイス階層からなるモノリシックな3次元メモリアレイを有し、
半導体デバイスは、チャンネル領域、ソース領域、ドレイン領域、および電荷記憶領域を有するTFT EEPROMから構成されることを特徴とするアレイ。
【請求項85】
EEPROMの製造方法であって、
半導体活性領域を形成するステップと、
活性領域の上方に電荷記憶領域を形成するステップと、
電荷記憶領域の上方に導電性ゲート層を形成するステップと、
電荷記憶領域に重なる制御ゲートを形成するために、ゲート層をパターン形成するステップと、
活性領域にソース領域およびドレインを形成するために、制御ゲートをマスクとして用いて、活性領域にドーピングするステップと、
制御ゲートの上方で、これに隣接する第1の絶縁層を形成するステップと、
フォトリソグラフィマスクを用いることなく、制御ゲートの上部部分を露出させるステップと、
ワードラインが制御ゲートに対して自己整合されるように、制御ゲートの露出した上部部分と接触するワードラインを形成するステップとを有することを特徴とする製造方法。
【請求項86】
請求項85に記載の製造方法であって、さらに、
ゲート層の上方に障壁層を形成するステップと、
ゲート層をパターン形成するステップの間に、障壁層をパターン形成するステップと、
制御ゲートおよび障壁層の側壁に隣接して、側壁スペーサを形成するステップとを有することを特徴とする製造方法。
【請求項87】
請求項86に記載の製造方法であって、
障壁層は、側壁スペーサおよび制御ゲートを構成する材料とは異なる材料で構成され、
制御ゲートの上部部分を露出させるステップは、障壁層を露出させるために、第1の絶縁層を平坦化するステップと、ゲートコンタクトビアを形成するために、側壁スペーサの間の障壁層を選択的に除去するステップとを有し、
ワードラインを形成するステップは、ゲートコンタクトビア内のワードラインの一部が制御ゲートの上部部分を形成するように、第1の絶縁層の上方にワードラインを配置するステップを含むことを特徴とする製造方法。
【請求項88】
請求項85に記載の製造方法であって、
ワードラインが実質的に平坦な上部表面を有するように、ワードラインは、第1の絶縁層の上に形成されることを特徴とする製造方法。
【請求項89】
請求項85に記載の製造方法であって、
制御ゲートの上部部分を露出させるステップは、制御ゲートを露出させるために、第1の絶縁層を平坦化するステップを含み、
ワードラインを形成するステップは、ワードラインが露出した制御ゲートと接触するように、第1の絶縁層の上方にワードラインを配置するステップを含むことを特徴とする製造方法。
【請求項90】
請求項85に記載の製造方法であって、
半導体活性領域を形成するステップは、中間絶縁層の上方にポリシリコンの活性層を形成するステップを含み、
電荷記憶領域を形成するステップは、ONO誘電膜または導電性ナノ結晶を含む絶縁層を形成するステップを含み、
ワードラインを形成するステップは、第1の絶縁層と露出した制御ゲートの上方に少なくとも1層の導電層を配置するステップと、ワードラインを形成するために少なくとも1層の導電層をエッチングするステップとを含むことを特徴とする製造方法。
【請求項91】
請求項90に記載の製造方法であって、さらに、
ワードラインがEEPROMのチャンネル領域および電荷記憶領域に対して自己整合されるように、ワードラインをマスクとして用いて、活性領域および電荷記憶領域をエッチングするステップを有することを特徴とする製造方法。
【請求項92】
請求項91に記載の製造方法であって、さらに、
制御ゲート側壁に隣接して、側壁スペーサを形成するステップと、
制御ゲート、側壁スペーサ、およびドープされたソース領域およびドレイン領域の上方に金属層を形成するステップと、
ソース領域およびドレイン領域の上方に金属シリサイド領域を形成するために、金属層を加熱するステップと、
側壁スペーサから金属層を選択的に除去するステップとを有することを特徴とする製造方法。
【請求項93】
請求項92に記載の製造方法であって、
ドープされたソース領域およびドレイン領域と、金属シリサイド領域は、ソース−チャンネル−ドレイン方向と実質的に垂直な方向に延びるビットラインを構成し、
ワードラインは、ソース−チャンネル−ドレイン方向と実質的に平行な方向に延びることを特徴とする製造方法。
【請求項94】
請求項93に記載の製造方法であって、
ポリシリコンの活性層を形成するステップは、
アモルファスシリコン層またはポリシリコン層を形成するステップと、
金属層を触媒として用いて、アモルファスシリコン層またはポリシリコン層を再結晶化させるために、EEPROMを加熱するステップとを有することを特徴とする製造方法。
【請求項95】
請求項85に記載の製造方法であって、
EEPROMは、2つのフォトリソグラフィのマスキングステップを用いて形成されることを特徴とする製造方法。
【請求項96】
基板の上方に配置された半導体デバイスアレイであって、このアレイは、
第1の方向で、基板の上方の第1の高さに配置された、第1の離間した複数の導電層と、
第1の方向とは異なる第2の方向で、第2の高さに配置された、第2の離間した複数のレール積層物とを備え、
各レール積層物は、
第1の離間した複数の導電層と接触する第1の表面を有する半導体膜と、
導電膜と、
半導体膜および導電膜の第2の表面の間に配置された局在的電荷記憶膜とを有することを特徴とするアレイ。
【請求項97】
請求項96に記載のアレイであって、
第2の離間した複数のレール積層物は、第1の離間した複数の導電層の上方に配置されることを特徴とするアレイ。
【請求項98】
請求項96に記載のアレイであって、
離間した導電層の間の空間が、平坦化された積層酸化物材料を有することを特徴とするアレイ。
【請求項99】
基板の上方に配置されたメモリアレイであって、
このアレイは、第1の方向で、基板の上方の第1の高さに配置された、第1の離間した複数のレール積層物を備え、
各レール積層物は、
導電膜と、
導電膜の上方に配置された局在的電荷記憶膜と、
局在的電荷記憶膜の上方に配置された半導体膜を有し、
このアレイは、第1の方向とは異なる第2の方向で、第1の高さの上方の第2の高さに配置された、第1の離間した複数の導電層を備え、
離間した導電層は、不純物を有する半導体膜の領域と重なり、
この領域は、離間した導電層および局在的電荷記憶膜の間を電気的に接続することを特徴とするメモリアレイ。
【請求項100】
請求項99に記載のメモリアレイであって、
このメモリアレイは、第1の方向で、第2の高さの上方の第3の高さに配置された、第3の離間した複数のレール積層物をさらに備え、
各レール積層物は、
導電膜と、
導電膜の上方に配置された局在的電荷記憶膜と、
局在的電荷記憶膜の上方に配置された半導体膜を有し、
このメモリアレイは、第2の方向で、第3の高さの上方の第4の高さに配置された、第4の離間した複数のレール積層物をさらに備え、
離間した導電層は、不純物を有する第2の半導体膜の領域と重なり、
この領域は、離間した導電層および局在的電荷記憶膜の間を電気的に接続することを特徴とするメモリアレイ。
【請求項101】
請求項99に記載のメモリアレイであって、
離間した導電層の間の空間が、平坦化された酸化材料を含むことを特徴とするメモリアレイ。
【請求項102】
基板の上方に配置されたメモリアレイであって、
このアレイは、第1の方向で、基板の上方の第1の高さに配置された、第1の離間した複数のレール積層物を備え、
各レール積層物は、導電膜と、導電膜の上方に配置された局在的電荷記憶膜とを有し、
このアレイは、第1の方向とは異なる第2の方向で、第1の高さの上方の第2の高さに配置された、第1の離間した複数の導電体をさらに備え、
離間した導電体は、離間した導電体が接触交差点において局在的電荷記憶膜と直接接触するように、レール積層物とともに接触交差点を形成し、
このアレイは、離間した導電体の間で、接触交差点の周囲の領域において、局在的電荷記憶膜の上方に積層された半導体膜をさらに有することを特徴とするメモリアレイ。
【請求項103】
請求項102に記載のメモリアレイであって、
離間した導電体の空間が、平坦化された酸化材料を有することを特徴とするメモリアレイ。
【請求項104】
回路であって、
複数の電荷記憶デバイスと、複数のアンチヒューズデバイスとを有することを特徴とする回路。
【請求項105】
半導体デバイスであって、
半導体活性領域と、
半導体活性領域に隣接した電荷記憶領域と、
第1の電極と、
第2の電極とを備え、
第1および第2の電極の間に第1のプログラム電圧が印加されたとき、電荷が電荷記憶領域に蓄積され、
第1および第2の電極の間に第1のプログラム電圧より高い第2のプログラム電圧が印加されたとき、第1および第2の電極の間に導電性経路を形成するために、導電性リンクが電荷記憶領域を貫通して形成されることを特徴とするデバイス。
【請求項106】
請求項105に記載のデバイスであって、
第1のプログラム電圧は、デバイスの閾値電圧を上げることにより、デバイスを切断することを特徴とするデバイス。
【請求項107】
請求項105に記載のデバイスであって、
このデバイスは、電荷記憶領域を含む半導体ダイオードを有することを特徴とするデバイス。
【請求項108】
請求項107に記載のデバイスであって、
ダイオードは、中間絶縁層により分離された少なくとも3つのデバイス階層を含む3次元モノリシックアレイとして構成されたポリシリコンまたはアモルファスシリコンダイオードを有し、アレイは基板の上方に配置され、
電荷記憶領域は、ダイオードの半導体活性領域のp−ドープされた領域およびn−ドープされた領域の間、あるいはダイオードの半導体活性領域のp−ドープされた領域またはn−ドープされた領域に配置された絶縁層の積層物を有することを特徴とするデバイス。【請求項109】
請求項105に記載のデバイスであって、
このデバイスは、フィールド・プログラマブル・ゲートアレイまたはプログラマブル・論理デバイスを含むことを特徴とするデバイス。
【請求項110】
基板の上方に配置された電荷記憶デバイスであって、
基板の上方に配置された遷移金属結晶化シリコンからなる第1の層と、
第1の層内に配置されたp−n接合部と、
第1の層に隣接して配置された局在的電荷記憶膜とを有することを特徴とするデバイス。
【請求項111】
請求項110に記載のデバイスを含む複数のデバイス階層を有するモノリシック3次元アレイであって、
p−n接合部は、ソース領域とチャンネル、またはドレイン領域とチャンネルの間の接合部を有することを特徴とするアレイ。
【請求項112】
電荷記憶デバイスの製造方法であって、
基板の上方に第1のアモルファスシリコン層またはポリシリコン層を配置するステップと、
第1の層内に遷移金属の触媒を配置するステップと、
第1の層を結晶化させるステップと、
第1の層内にp−n接合を形成するステップと、
第1の層に隣接して配置された局在的電荷記憶膜を形成するステップとを有することを特徴とする方法。
【請求項113】
請求項112に記載の方法であって、
結晶化ステップは、約400℃ないし約700℃の範囲の温度で実施され、
この方法は、約750℃ないし約975℃の範囲の高温アニール処理で、第1の層を結晶化させるステップをさらに有することを特徴とする方法。
【請求項114】
請求項112に記載の方法であって、
局在的電荷記憶膜に隣接して配置されたゲートを形成するステップをさらに有することを特徴とする方法。
【請求項115】
請求項114に記載の方法であって、
遷移金属結晶化シリコンのTFTを有する複数のデバイス階層を形成するステップをさらに有することを特徴とする方法。
【請求項116】
複数のデバイス階層を含む電荷記憶デバイスのモノリシック3次元アレイを有する半導体デバイスであって、
2つの連続するデバイス階層間の少なくとも1つの面が、化学機械的な研磨により平坦化されることを特徴とする半導体デバイス。
【請求項117】
請求項116に記載の半導体デバイスであって、
アレイは、4つまたはそれ以上のデバイス階層を有することを特徴とする半導体デバイス。
【請求項118】
請求項117に記載の半導体デバイスであって、
各電荷記憶デバイスは、柱状TFT EEPROMを有することを特徴とする半導体デバイス。
【請求項119】
請求項117に記載の半導体デバイスであって、
各電荷記憶デバイスは、電荷記憶領域を含む柱状ダイオードを有することを特徴とする半導体デバイス。
【請求項120】
請求項117に記載の半導体デバイスであって、
各電荷記憶デバイスは、自己整合されたTFT EEPROMを有することを特徴とする半導体デバイス。
【請求項121】
請求項117に記載の半導体デバイスであって、
各電荷記憶デバイスは、レール積層物TFT EEPROMを有することを特徴とする半導体デバイス。
【請求項122】
請求項117に記載の半導体デバイスであって、
各デバイス階層の絶縁層または導電層の表面は、化学機械的な研磨により平坦化されることを特徴とする半導体デバイス。
【請求項123】
請求項117に記載の半導体デバイスであって、
2階層の間に配置された中間絶縁層の表面は、化学機械的な研磨により平坦化されることを特徴とする半導体デバイス。
【請求項124】
請求項117に記載の半導体デバイスであって、
化学機械的な研磨により平坦化された表面のピーク間の粗さは、4000Å以下であることを特徴とする半導体デバイス。
【請求項125】
請求項117に記載の半導体デバイスであって、
基板内の少なくとも部分的にはアレイの下方、内部、または上方に形成される駆動回路をさらに有することを特徴とする半導体デバイス。
【請求項126】
請求項125に記載の半導体デバイスであって、
駆動回路は、基板内のアレイの下方に形成された、少なくとも1つのセンスアンプと電荷ポンプを有することを特徴とする半導体デバイス。
【請求項127】
電荷記憶デバイスのモノリシックな3次元アレイの製造方法であって、
複数のデバイス階層を形成するステップと、
連続する2つのデバイス階層間の少なくとも1つの表面が化学機械的研磨により平坦化されるステップとを有することを特徴とする方法。
【請求項128】
請求項127に記載の方法であって、
4つまたはそれ以上のデバイス階層を形成するステップと、
連続する少なくとも3つのデバイス階層の間の少なくとも1つの表面が化学機械的研磨により平坦化されるステップとを有することを特徴とする方法。
【請求項129】
請求項128に記載の方法であって、
各電荷記憶デバイスは、柱状TFT EEPROM、電荷記憶領域を含む柱状ダイオード、自己整合されたTFT EEPROM、およびレール積層物TFT EEPROMからなるグループから選択されることを特徴とする方法。
【請求項130】
請求項128に記載の方法であって、
各電荷記憶デバイス内の絶縁層の表面が、化学機械的研磨により平坦化されることを特徴とする方法。
【請求項131】
請求項128に記載の方法であって、
各電荷記憶デバイス内の導電層の表面が、化学機械的研磨により平坦化されることを特徴とする方法。
【請求項132】
請求項128に記載の方法であって、
2つのデバイス階層間に配置される中間絶縁層の表面が化学機械的研磨により平坦化されるステップとを有することを特徴とする方法。
【請求項133】
請求項128に記載の方法であって、
基板内の少なくとも部分的にはアレイの下方、内部、または上方に駆動回路を形成するステップをさらに有することを特徴とする方法。
【請求項134】
請求項133に記載の方法であって、
駆動回路は、基板内のアレイの下方に形成された、少なくとも1つのセンスアンプと電荷ポンプを有することを特徴とする方法。
【請求項135】
複数のデバイス階層を含む電荷記憶デバイスのモノリシック3次元アレイを有する半導体デバイスであって、
2つの連続するデバイス階層間の少なくとも1つの面が、ステッパフィールドにおいて、4000Å以下のピーク間の粗さを有することを特徴とする半導体デバイス。
【請求項136】
請求項135に記載の半導体デバイスであって、
4つまたはそれ以上のデバイス階層を有することを特徴とする半導体デバイス。
【請求項137】
請求項136に記載の半導体デバイスであって、
各電荷記憶デバイスは、柱状TFT EEPROM、電荷記憶領域を含む柱状ダイオード、自己整合されたTFT EEPROM、およびレール積層物TFT EEPROMからなるグループから選択されることを特徴とする半導体デバイス。
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US27985501P 2001-03-28 2001-03-28
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