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各位好,
* {2 M$ i& {5 o, l1 o最近在參考Foundry的LPE command file對寄生參數的寫法時,對ATTRIBUTE CAP的語法有些疑惑
. f0 @# P% P# A' x依照Dracula Reference內ATTRIBUTE CAP章節內Case 4的定義如下
S* ^& i& x: M# {: j8 {+ tCase 4:, C d: X! C6 Y0 g
PARASITIC CAP {subType} device_layer terminal_layer1 terminal_layer21 v1 ~, Y( |$ L& x1 I5 z4 K0 q, U
ATTRIBUTE CAP {subType} areaCoeff perimCoeff depthRange sidewallCoeff
. d) e0 `+ Y B: f9 Y! j且參考此章節Example 4 中的例子( U7 ?, t% P3 E" k- R, B/ d7 M% G
*OPERATION
& s( j# W3 O3 U# ?( U/ fPARASITIC CAP[F] M12 MET1 MET2
, {4 o9 `4 j. L& m( tATTRIBUTE CAP[F] 0.5 1.2 0.2 0.019 ; PIECE-WISE COEFFICIENT
[' e$ ]8 t* U* tATTRIBUTE CAP[F] 0.5 1.2 0.6 0.032 ; PIECE-WISE COEFFICIENT+ X# F# p6 I$ s9 K* u
LEXTRACT NEWE M12 BY CAP[F] PFILE & ; FLEXIBLE EQUATION3 ]. U$ Y' K$ {9 D
EQUATION C= 0.5*AREA +1.2*(PERI-TPR) + CLL" ?# `! G$ d! R5 ~/ M5 K/ \# c
...8 k# ~' ] ~, W$ {0 y! B) a+ ]
*END' w2 Y( k! x% C
2 i& l& R- c3 ^& T
其中(若以下解釋有錯請糾正我)& Y9 e( P3 r) m. C& Y/ |( m9 ^- A, }
areaCoeff為M12的單位面積寄生電容值(Ca). ^* z+ F T: E: z5 L
perimCoeff為M12的邊緣電容值
4 G) k. N3 L; G. OdepthRange為M12距離MET1的距離- B( I( ?9 U7 V4 j1 m
sidewallCoeff為不同距離區間下M12與MET1的Fringe電容值* z% A* e3 a; Z! u q: ~( e4 V
) b! Y6 t& G7 f3 V* Y以下為我節取一段Foundry的LPE command
* V- J4 S1 t1 [1 g( b3 _3 { PARASITIC CAP[A3] M12 ME1 ME2 # r& o7 i9 \) L' i" o- Z4 L
ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 0.42 1.6709E-05
! n9 p1 K2 o8 |: g1 v5 r ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 0.966664 4.20651E-05
+ s, X2 f3 e, q5 M/ N ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 1.51333 5.99823E-052 i% `) K9 k. ?# p+ I
ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 2.06 7.1379E-05! n; y5 l* P9 `5 [3 Q$ h
ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 2.60666 7.83301E-05
% P! s/ v, h. N4 D$ w, v ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 3.15334 8.2139E-05
8 K+ M1 k9 S9 _$ A! y為何ME1距離M12越遠Fringe電容值越大?
( M+ o: b& R- m9 C電容不是兩端越遠電容值越小嗎?- F8 a" @4 o1 \; `1 G* \, g
還是我根本就理解錯誤?
. V! W/ m, [$ [ P2 e. p懇請各位不吝指教,感謝!!感謝!! |
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