JP6377193B2 - 偽装機能を有する半導体装置 - Google Patents
偽装機能を有する半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 73
- 239000000758 substrate Substances 0.000 claims description 29
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
- 229920005591 polysilicon Polymers 0.000 claims description 3
- 208000022010 Lhermitte-Duclos disease Diseases 0.000 claims 6
- 239000004020 conductor Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 239000007943 implant Substances 0.000 description 7
- 238000005530 etching Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Description
10b 第1の偽装デバイス
30 第1の偽装デバイス
40 第1の偽装デバイス
50 第1の偽装デバイス
60 第1の偽装デバイス
70 第2の偽装デバイス
100 基板
101 ゲート酸化物
102 ゲート
104 ソース
106 ドレイン
108 第1の低濃度ドープドレイン(LDD)
110 第2のLDD
112 スペーサ
300a ゲート
300b ゲート
302 高濃度ドープ領域
500 高濃度ドープ領域
600 高濃度カウンタドープ領域
700 ウェル
800 コンタクトプラグ
900 コンタクトホール
902 絶縁構造
904 ILD層
906 絶縁構造
1000 非ドープ領域
1002 n+型領域
1004 p+型領域
1100a 論理デバイス
1100b 偽装デバイス
1106 p+型領域
1102 非ドープ領域
1104 非ドープ領域
A1 断面積
A2 断面積
Claims (21)
- 基板上に形成され、バイアス電圧によってオンになる論理デバイスと、
前記基板上に形成され、前記論理デバイスに印加されるバイアス電圧と同一のバイアス電圧によってオンにならない第1の偽装デバイスと、を備え、
前記第1の偽装デバイスは、
2つのゲートと、
前記2つのゲートの第1の側にあるソースと、
前記2つのゲートの第2の側にあるドレインと、
前記基板内の前記2つのゲート間にある高濃度ドープ領域と、
を備え、
前記ソースと前記高濃度ドープ領域は異なる導体タイプを有する、
偽装機能を備えた半導体装置。 - 前記ソースがn+領域であると共に、前記高濃度ドープ領域がp+領域である、
または、
前記ソースがp+領域であると共に、前記高濃度ドープ領域がn+領域である、
請求項1に記載の半導体装置。 - 基板上に形成され、バイアス電圧によってオンになる論理デバイスと、
前記基板上に形成され、前記論理デバイスに印加されるバイアス電圧と同一のバイアス電圧によってオンにならない第1の偽装デバイスと、を備え、
前記第1の偽装デバイスは、
2つのゲートと、
前記2つのゲートの第1の側にあるソースと、
前記2つのゲートの第2の側にあるドレインと、
前記2つのゲート間にある実質的非ドープ領域と、
を備える、偽装機能を備えた半導体装置。 - 前記ソースと前記第1の側の間および前記ドレインと前記第2の側の間にそれぞれある複数の第1のLDDをさらに備えた、請求項3に記載の半導体装置。
- 前記複数の第1のLDDがnLDDであると共に、前記ソースと前記ドレインがn+領域である、請求項4に記載の半導体装置。
- 前記複数の第1のLDDがpLDDであると共に、前記ソースと前記ドレインがp+領域である、請求項4に記載の半導体装置。
- 基板上に形成され、バイアス電圧によってオンになる論理デバイスと、
前記基板上に形成され、前記論理デバイスに印加されるバイアス電圧と同一のバイアス電圧によってオンにならない第1の偽装デバイスと、を備え、
前記第1の偽装デバイスは、
第1のゲートと、第2のゲートと、
前記第1のゲートの第1の側にあるソースと、
前記第2のゲートの第2の側にあるドレインと、
前記第1のゲートと前記第2のゲートの間にある高濃度ドープ領域と、
前記ソースと前記第1のゲートの間および前記ドレインと前記第2のゲートの間にある複数の第1のLDDと、前記高濃度ドープ領域と前記第1のゲートの間および前記高濃度ドープ領域と前記第2のゲートの間にそれぞれある複数の実質的非ドープ領域と、を備える、偽装機能を備えた半導体装置。 - 前記複数の第1のLDDがnLDDであると共に、前記ソース、前記ドレインおよび前記高濃度ドープ領域がn+領域である、請求項7に記載の半導体装置。
- 前記複数の第1のLDDがpLDDであると共に、前記ソース、前記ドレインおよび前記高濃度ドープ領域がp+領域である、請求項7に記載の半導体装置。
- 基板上に形成され、バイアス電圧によってオンになる論理デバイスと、
前記基板上に形成され、前記論理デバイスに印加されるバイアス電圧と同一のバイアス電圧によってオンにならない第1の偽装デバイスと、を備え、
前記第1の偽装デバイスは、
ゲートと、
前記ゲートの第1の側にあるソースと、
前記ゲートの第2の側にあるドレインと、
前記基板内の前記ゲートの下にあるチャネルと、
前記チャネル上の前記ゲート内にある高濃度カウンタドープ領域と、
を備え、
前記高濃度カウンタドープ領域と前記ソースは異なる導電型を有する、
偽装機能を備えた半導体装置。 - 前記ソースがn+領域であると共に、前記高濃度カウンタドープ領域がp+領域である、または
前記ソースがp+領域であると共に、前記高濃度カウンタドープ領域がn+領域である、請求項10に記載の半導体装置。 - 前記高濃度カウンタドープ領域は、前記ゲートの中央部に配置されている、請求項10または11に記載の半導体装置。
- 前記基板上に形成された第2の偽装デバイスをさらに備え、
前記第2の偽装デバイスは、
ゲートと、
前記基板内にあるウェルと、
前記ゲートの第1の側の前記ウェル内にあるソースと、
前記ゲートの第2の側の前記ウェル内にあるドレインと、
を備え、
前記ウェルと前記基板は異なる導電型を有する、
請求項1から12のうちいずれか一項に記載の半導体装置。 - 前記基板がp型基板であると共に、前記ウェルがNウェルである、または、
前記基板がn型基板であると共に、前記ウェルがPウェルである、
請求項13に記載の半導体装置。 - 前記論理デバイスを接続するためのコンタクトホール内のコンタクトプラグと、
前記コンタクトホール内の前記コンタクトプラグと前記論理デバイスとの間にある絶縁構造と、をさらに備えた、請求項1から14のうちいずれか一項に記載の半導体装置。 - 前記絶縁構造の断面積は、前記コンタクトプラグの断面積よりも少ない、請求項15に記載の半導体装置。
- 前記絶縁構造は酸化物層である、請求項15または16に記載の半導体装置。
- 前記基板上に形成された第3の偽装デバイスをさらに備え、
前記第3の偽装デバイスは、実質的非ドープ領域を有するポリシリコン構造を備える、請求項1から17のうちいずれか一項に記載の半導体装置。 - 前記論理デバイスと前記偽装デバイスのうち少なくとも1つを接続するための配線をさらに備え、
前記配線は、実質的非ドープ領域を有するポリシリコンラインである、
請求項1から18のうちのいずれか一項に記載の半導体装置。 - 前記論理デバイスは、第1の閾値電圧を有し、
前記第1の偽装デバイスは、前記第1の閾値電圧の二倍以上である第2の閾値電圧を有する、請求項1から19のうちいずれか一項に記載の半導体装置。 - 前記論理デバイスと前記第1の偽装デバイスは、同じ寸法、サイズまたは形状を有する、請求項1から20のうちいずれか一項に記載の半導体装置。
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US5202591A (en) | 1991-08-09 | 1993-04-13 | Hughes Aircraft Company | Dynamic circuit disguise for microelectronic integrated digital logic circuits |
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