JPWO2019116883A1 - 半導体集積回路装置 - Google Patents
半導体集積回路装置 Download PDFInfo
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Abstract
Description
図1〜図3は第1実施形態に係るセルのレイアウト構造の例を示す図であり、図1は平面図、図2(a),(b)は層別の平面図、図3(a)〜(e)は断面図である。具体的には、図2(a)はVNW FETおよびその下の層を示し、図2(b)はVNW FETよりも上の層を示す。図3(a)〜(c)は図1の平面視縦方向の断面図、図3(d)〜(e)は図1の平面視横方向の断面図であり、図3(a)は線X1−X1’の断面、図3(b)は線X2−X2’の断面、図3(c)は線X3−X3’の断面、図3(d)は線Y1−Y1’の断面、図3(e)は線Y2−Y2’の断面である。
第1実施形態では、ダミーVNW FETであるトランジスタP3,N3について、ボトムはフローティングになっていた。これに対して、本変形例1では、図5の回路図において破線で示すように、トランジスタP3,N3のボトムが出力Yに接続されている。これにより、トランジスタP3,N3のボトムのフローティングが回避されるので、回路動作の安定性が向上する。
上の変形例1では、ダミーVNW FETであるトランジスタP3,N3について、ボトムのフローティングは回避されたが、ゲートはフローティングになっていた。これに対して本変形例2では、図7の回路図に破線で示すように、トランジスタP3,N3のゲートが出力Yに接続されている。これにより、トランジスタP3,N3のゲートのフローティングが回避されるので、回路動作の安定性がさらに向上する。
図9〜図11は第2実施形態に係るセルのレイアウト構造の例を示す図であり、図9は平面図、図10(a),(b)は層別の平面図、図11(a)〜(e)は断面図である。具体的には、図10(a)はVNW FETおよびその下の層を示し、図10(b)はVNW FETよりも上の層を示す。図11(a)〜(c)は図9の平面視縦方向の断面図、図11(d)〜(e)は図9の平面視横方向の断面図であり、図11(a)は線X1−X1’の断面、図11(b)は線X2−X2’の断面、図11(c)は線X3−X3’の断面、図11(d)は線Y1−Y1’の断面、図11(e)は線Y2−Y2’の断面である。図9〜図11に示すセルは、図5に示すような入力A,B、出力Yの2入力NAND回路を実現している。
第2実施形態では、ダミーVNW FETであるトランジスタP3,N3について、ゲートはフローティングになっていた。これに対して本変形例1では、図7の回路図に破線で示すように、トランジスタP3,N3のゲートを出力Yに接続している。
(その1)
図13は他の実施形態に係るセルのレイアウト構造の例を示す平面図である。図13のセルは、P型トランジスタ領域の構成は、図1に示す第1実施形態に係るセルと同様であり、N型トランジスタ領域の構成は、図9に示す第2実施形態に係るセルと同様である。
図14は他の実施形態に係るセルのレイアウト構造の例を示す平面図である。図14のセルは、P型トランジスタ領域の構成は、図9に示す第2実施形態に係るセルと同様であり、N型トランジスタ領域の構成は、図1に示す第1実施形態に係るセルと同様である。
図15は他の実施形態に係るセルのレイアウト構造の例を示す平面図である。また、図16は、図15に示すセルの回路図である。図16に示すように、図15に示すセルは、入力A,B、出力Yの2入力NOR回路を実現している。
図17は他の実施形態に係るセルのレイアウト構造の例を示す平面図、図18(a),(b)は層別の平面図である。具体的には、図18(a)はVNW FETおよびその下の層を示し、図18(b)はVNW FETよりも上の層を示す。また、図19は、図17および図18に示すセルの回路図である。図19に示すように、図17および図18に示すセルは、入力A,B,C、出力Yの3入力NAND回路を実現している。なお、以下の説明では、第1実施形態と共通の構成については、説明を省略する場合がある。
上述したレイアウト構造の例では、VNWの平面形状は円形であるものとしたが、VNWの平面形状は円形に限られるものではない。例えば、矩形、長円形などであってもかまわない。
図21は本開示に係るセルを用いた半導体集積回路装置における回路ブロックのレイアウトの一例を示す平面図である。図21に示す回路ブロックでは、複数のセルCがX方向(第1方向に相当)に並ぶ複数のセル列CR1,CR2,CR3が、Y方向(第1方向と垂直をなす第2方向に相当)に並べて配置されている。複数のセルCの中で、ND2は2入力NANDセル、NR2は2入力NORセル、ND3は3入力NANDセルであり、上述したような、VNW FETを含むレイアウト構造を有している。その他のセルについては、詳細なレイアウト構造は図示を省略している。複数のセル列CR1,CR2,CR3のY方向における両側に、X方向に延びる電源配線VSS1,VDD1,VSS2,VDD2が配置されている。電源配線VSS1,VSS2は電源電圧VSSを供給し、電源配線VDD1,VDD2は電源電圧VDDを供給する。
N3 第2ダミーVNW FET
25 ゲート配線
37 ローカル配線(信号配線)
137 ローカル配線(信号配線)
237 ローカル配線(信号配線)
330 ローカル配線(信号配線)
VDD 第1電源配線
VSS 第2電源配線
C セル
CR1,CR2,CR3 セル列
VSS1,VDD1,VSS2,VDD2 電源配線
B1,B2,B3,B4,B5,B6 VNW FET
Claims (6)
- スタンダードセルを含む半導体集積回路装置であって、
前記スタンダードセルは、
第1方向に延び、第1電源電圧を供給する第1電源配線と、
前記第1方向に延び、前記第1電源電圧と異なる第2電源電圧を供給する第2電源配線と、
前記第1電源配線と前記第2電源配線との間において、前記第1電源配線の側に設けられており、1個以上のアクティブP型VNW(Vertical Nanowire:縦型ナノワイヤ) FETが形成された、P型トランジスタ領域と、
前記第1電源配線と前記第2電源配線との間において、前記第2電源配線の側に設けられており、1個以上のアクティブN型VNW FETが形成された、N型トランジスタ領域と、
前記P型トランジスタ領域から前記N型トランジスタ領域にわたって配置された、信号配線とを備え、
前記P型トランジスタ領域および前記N型トランジスタ領域のうち少なくともいずれか一方に、少なくとも1つのダミーVNW FETが形成されており、
前記ダミーVNW FETのトップ電極は、前記信号配線と接続されている
ことを特徴とする半導体集積回路装置。 - 請求項1記載の半導体集積回路装置において、
前記ダミーVNW FETのボトム電極は、前記信号配線と接続されている
ことを特徴とする半導体集積回路装置。 - 請求項1記載の半導体集積回路装置において、
前記ダミーVNW FETのゲート電極は、前記信号配線と接続されている
ことを特徴とする半導体集積回路装置。 - 請求項1記載の半導体集積回路装置において、
前記ダミーVNW FETは、前記P型トランジスタ領域に形成された第1ダミーVNW FETと、前記N型トランジスタ領域に形成された第2ダミーVNW FETとを含む
ことを特徴とする半導体集積回路装置。 - 請求項4記載の半導体集積回路装置において、
前記第1および第2ダミーVNW FETのゲート電極は、共通のゲート配線によって互いに接続されており、かつ、前記信号配線と接続されている
ことを特徴とする半導体集積回路装置。 - 半導体集積回路装置であって、
複数のスタンダードセルが第1方向に並ぶセル列が、複数列、前記第1方向と垂直をなす第2方向に並べて配置された、回路ブロックを備え、
前記回路ブロックは、
前記第1方向に延びる第1電源配線と、
前記複数のセル列の一部であって、前記第1電源配線の前記第2方向における両側にそれぞれ配置されており、前記第1電源配線を共有する第1および第2セル列とを備え、
前記第1セル列は、第1VNW(Vertical Nanowire:縦型ナノワイヤ) FETを含む第1スタンダードセルを含み、
前記第2セル列は、第2VNW FETを含む第2スタンダードセルを含み、
前記第1VNW FETと前記第2VNW FETとは、前記第1方向において同一位置に配置されており、
前記第1電源配線は、前記第1VNW FETのトップ電極およびボトム電極のうち少なくともいずれか一方と接続されており、かつ、前記第2VNW FETのトップ電極およびボトム電極のうち少なくともいずれか一方と接続されている
ことを特徴とする半導体集積回路装置。
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JP2008118004A (ja) * | 2006-11-07 | 2008-05-22 | Nec Electronics Corp | 半導体集積回路 |
WO2009078069A1 (ja) * | 2007-12-14 | 2009-06-25 | Fujitsu Limited | 半導体装置 |
JP2011228519A (ja) * | 2010-04-21 | 2011-11-10 | Unisantis Electronics Japan Ltd | 半導体装置 |
WO2015025441A1 (ja) * | 2013-08-23 | 2015-02-26 | パナソニック株式会社 | 半導体集積回路装置 |
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