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各位好,+ T2 t8 U1 e! | j: ]( f( e" ^
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1 _! [* j. Z" y0 G
依照Dracula Reference內ATTRIBUTE CAP章節內Case 4的定義如下# S6 @& M0 G% _+ i, }% m
Case 4:
0 w- F+ x- P1 A" v! JPARASITIC CAP {subType} device_layer terminal_layer1 terminal_layer2: b* S% \/ r7 C8 f
ATTRIBUTE CAP {subType} areaCoeff perimCoeff depthRange sidewallCoeff
9 Y8 I2 y+ T& f且參考此章節Example 4 中的例子
7 b6 X; D5 Z* ~, `, B6 V*OPERATION
' }2 F# _; f9 wPARASITIC CAP[F] M12 MET1 MET2; b- I7 T( B5 ~- e, S
ATTRIBUTE CAP[F] 0.5 1.2 0.2 0.019 ; PIECE-WISE COEFFICIENT1 f( c3 k# ?$ ~+ x" W: s& G5 k& v9 u
ATTRIBUTE CAP[F] 0.5 1.2 0.6 0.032 ; PIECE-WISE COEFFICIENT: v, _$ u8 D. j
LEXTRACT NEWE M12 BY CAP[F] PFILE & ; FLEXIBLE EQUATION
# r! }- T, k, H/ X9 h% d" j$ h7 REQUATION C= 0.5*AREA +1.2*(PERI-TPR) + CLL. q X' S7 V6 T, z* q% j- w
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*END' m9 q" S2 u q! ~' c' B
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其中(若以下解釋有錯請糾正我)
7 M+ E7 @% U1 \0 YareaCoeff為M12的單位面積寄生電容值(Ca)
- @+ M6 m0 Z6 m1 Z) y$ t" K% O1 DperimCoeff為M12的邊緣電容值' d* {6 H8 l, U+ a
depthRange為M12距離MET1的距離
P+ s* A3 r' [% s5 psidewallCoeff為不同距離區間下M12與MET1的Fringe電容值
' \ w1 {# {% X& D/ }" h* \ y4 D: d" B6 s) Q% f: v, R9 T: y, _+ `1 d
以下為我節取一段Foundry的LPE command
" |1 ?8 M( J5 R$ }- G# V: [ PARASITIC CAP[A3] M12 ME1 ME2
1 h- L2 A; l8 b/ x ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 0.42 1.6709E-055 \6 Y ^7 }: B, h& o! {
ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 0.966664 4.20651E-05, Z0 U; H+ e) E$ \% l8 y1 n
ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 1.51333 5.99823E-05
, E% k4 Y) Y: ] ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 2.06 7.1379E-05
3 B0 G0 r6 {% h' H ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 2.60666 7.83301E-05
9 A, q0 [0 \/ f8 Z) B0 v ATTRIBUTE CAP[A3] 3.871E-05 4.2267E-05 3.15334 8.2139E-05
* l9 @' T6 }: W為何ME1距離M12越遠Fringe電容值越大?, `# ^( z: N3 P; ^, f$ ?! E
電容不是兩端越遠電容值越小嗎?
( r- R7 r L1 a( M9 q0 o還是我根本就理解錯誤?
) z$ V$ u: L+ [" D懇請各位不吝指教,感謝!!感謝!! |
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