JP6096237B2 - 性能改善を有するアンチヒューズotpメモリセル、およびメモリの製造方法と操作方法 - Google Patents
性能改善を有するアンチヒューズotpメモリセル、およびメモリの製造方法と操作方法 Download PDFInfo
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- JP6096237B2 JP6096237B2 JP2015071343A JP2015071343A JP6096237B2 JP 6096237 B2 JP6096237 B2 JP 6096237B2 JP 2015071343 A JP2015071343 A JP 2015071343A JP 2015071343 A JP2015071343 A JP 2015071343A JP 6096237 B2 JP6096237 B2 JP 6096237B2
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- 230000015654 memory Effects 0.000 title claims description 227
- 238000004519 manufacturing process Methods 0.000 title description 22
- 239000000758 substrate Substances 0.000 claims description 106
- 238000000034 method Methods 0.000 claims description 41
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 1
- 230000001629 suppression Effects 0.000 description 9
- 238000005468 ion implantation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000002513 implantation Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
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Description
202 基板
204、236 ウェル
206 アンチヒューズユニット
208 選択レジスタ
210 アンチヒューズ層
212、AF アンチヒューズゲート
214 修正された拡張ドーピング領域
214a、214b、216、218、224、D、S、W ドーピング領域
220 ゲート誘電体層
226 軽ドーピング領域
228 ソース/ドレイン拡張
230 スペーサー
232 アンチヒューズ構造
234 選択ゲート構造
D1、D2 厚さ
M1〜M4 メモリセル
WL0〜WL1 ワード線
AF0〜AF1 アンチヒューズゲート線
BL0〜BL1 ビット線
Claims (12)
- 基板の上に配置され、前記基板は第1導電型を有し、
前記基板の上に配置されたアンチヒューズゲートと、
前記アンチヒューズゲートと前記基板の間に配置されたアンチヒューズ層と、
第2導電型を有し、前記アンチヒューズ層の下方の前記基板内に配置された修正された拡張ドーピング領域と、
前記第2導電型を有し、それぞれ前記基板内で前記アンチヒューズゲートの2つの対向する側に配置された第1ドーピング領域および第2ドーピング領域と
を含み、前記アンチヒューズ層、前記アンチヒューズゲートおよび前記修正された拡張ドーピング領域がバラクターを形成するアンチヒューズユニットと、
前記基板の上に配置され、
前記基板の上に配置された選択ゲートと、
前記選択ゲートと前記基板の間に配置されたゲート誘電体層と、
前記第2導電型を有し、それぞれ前記基板内で前記選択ゲートの2つの対向する側に配置された前記第2ドーピング領域および第3ドーピング領域と
を含む選択トランジスタと
を含む性能改善を有するアンチヒューズワンタイムプログラマブルメモリセルであって、
前記選択トランジスタが、さらに、
前記第2導電型を有し、前記選択ゲートと前記第2ドーピング領域の間に配置され、接合深さが、前記修正された拡張ドーピング領域の接合深さと同じであり、ドーピング濃度が、前記修正された拡張ドーピング領域のドーピング濃度と同じである軽ドーピング領域と、
前記第2導電型を有し、前記選択ゲートと前記第3ドーピング領域の間に配置され、接合深さが、前記修正された拡張ドーピング領域の前記接合深さよりも浅く、ドーピング濃度が、前記修正された拡張ドーピング領域の前記ドーピング濃度よりも高いソース/ドレイン拡張と
を含む、性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。 - 前記アンチヒューズ層の厚さが、前記ゲート誘電体層の厚さと等しい請求項1に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。
- 前記選択トランジスタが、コア金属酸化膜半導体トランジスタである請求項1または2に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。
- 基板の上に配置され、前記基板は第1導電型を有し、
前記基板の上に配置されたアンチヒューズゲートと、
前記アンチヒューズゲートと前記基板の間に配置されたアンチヒューズ層と、
第2導電型を有し、前記アンチヒューズ層の下方の前記基板内に配置された修正された拡張ドーピング領域と、
前記第2導電型を有し、それぞれ前記基板内で前記アンチヒューズゲートの2つの対向する側に配置された第1ドーピング領域および第2ドーピング領域と
を含み、前記アンチヒューズ層、前記アンチヒューズゲートおよび前記修正された拡張ドーピング領域がバラクターを形成するアンチヒューズユニットと、
前記基板の上に配置され、
前記基板の上に配置された選択ゲートと、
前記選択ゲートと前記基板の間に配置されたゲート誘電体層と、
前記第2導電型を有し、それぞれ前記基板内で前記選択ゲートの2つの対向する側に配置された前記第2ドーピング領域および第3ドーピング領域と
を含む選択トランジスタと
を含む性能改善を有するアンチヒューズワンタイムプログラマブルメモリセルであって、
前記選択トランジスタが、デュアルゲート誘電体層金属酸化膜半導体トランジスタであり、前記第2ドーピング領域に近い前記ゲート誘電体層の厚さが、前記第3ドーピング領域に近い前記ゲート誘電体層の厚さよりも厚い、性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。 - 前記選択トランジスタが、さらに、
前記第2導電型を有し、前記選択ゲートと前記第2ドーピング領域の間に配置され、接合深さが、前記修正された拡張ドーピング領域の接合深さと同じであり、ドーピング濃度が、前記修正された拡張ドーピング領域のドーピング濃度と同じである軽ドーピング領域と、
前記第2導電型を有し、前記選択ゲートと前記第3ドーピング領域の間に配置され、接合深さが、前記修正された拡張ドーピング領域の前記接合深さよりも浅く、ドーピング濃度が、前記修正された拡張ドーピング領域の前記ドーピング濃度よりも高いソース/ドレイン拡張と
を含む請求項4に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。 - 前記選択トランジスタが、さらに、
前記第2導電型を有し、前記選択ゲートと前記第2ドーピング領域の間に配置された軽ドーピング領域と、
前記第2導電型を有し、前記選択ゲートと前記第3ドーピング領域の間に配置され、接合深さが、前記軽ドーピング領域の前記接合深さよりも浅く、ドーピング濃度が、前記軽ドーピング領域の前記ドーピング濃度よりも高いソース/ドレイン拡張と
を含む請求項4に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。 - 前記第1導電型が、P型およびN型のうちの1つであり、前記第2導電型が、前記P型および前記N型のうちの別の1つである請求項1〜6のいずれか1項に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。
- 前記修正された拡張ドーピング領域が、ウェルである請求項1〜7のいずれか1項に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。
- 前記ウェルの一部が、前記選択ゲートの下部に延伸する請求項8に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。
- 前記ウェルの一部が、前記第2ドーピング領域の下部に延伸する請求項8に記載の性能改善を有するアンチヒューズワンタイムプログラマブルメモリセル。
- 一列に配列された複数のメモリセルを含むメモリの操作方法であって、各前記メモリセルが、基板の上に配置された選択トランジスタと、前記選択トランジスタに直列に接続されたアンチヒューズユニットとを含み、前記アンチヒューズユニットが、前記基板の上に順番に配置されたアンチヒューズ層およびアンチヒューズゲートと、前記アンチヒューズ層の下方の前記基板内に配置された修正された拡張ドーピング領域と、前記基板内で前記アンチヒューズゲートの2つの対向する側に配置された第1ドーピング領域および第2ドーピング領域とを含み、前記アンチヒューズ層、前記アンチヒューズゲートおよび前記修正された拡張ドーピング領域が、バラクターを形成し、前記選択トランジスタが、選択ゲートと、前記基板内で前記選択ゲートの2つの対向する側にそれぞれ配置された前記第2ドーピング領域および第3ドーピング領域を含み、複数のワード線が、それぞれ同じ行の前記メモリセルの前記選択ゲートに接続され、複数のアンチヒューズゲート線が、それぞれ同じ行の前記メモリセルの前記アンチヒューズゲートに接続され、複数のビット線が、それぞれ同じ列の前記メモリセルの前記第3ドーピング領域に接続され、前記メモリセルの前記操作方法が、
読み取り操作において、選択されたメモリセルに結合された前記ワード線に第1電圧を印加し、前記選択されたメモリセルに結合された前記ビット線に第2電圧を印加し、前記選択されたメモリセルに結合された前記アンチヒューズゲート線に第3電圧を印加し、前記第1電圧が、前記選択されたメモリセルの前記選択トランジスタのチャネルをオンにするのに十分であり、前記選択されたメモリセルに記憶されたデータが、前記選択されたメモリセルに結合された前記アンチヒューズゲートを介して前記選択されたメモリセルのチャネル電流を検出することにより決定されるメモリの操作方法。 - 前記第1電圧が、前記第3電圧に等しく、前記第2電圧が、0Vである請求項11に記載のメモリの操作方法。
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