ASSURA blackbox LVS问题请教

dyandwanzi

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基於無 gds 數據的標準單元 LVS ，所以只能將標準單元設置成 blackbox (我沒有用?blackboxcell，因為extract rule裡沒有找到 pinlayer的定義)。現在的問題是ASSURA在提標準單元版圖時，會多提出pin。比如CLKBUFX4這個單元schematic pin: Y A VDD VSS，layout pin: Y A VDD VSS avC9 avS10。不知道avC9 avS10從哪裡來（用的是arm sage-x的庫，應該單元內部都有襯底阱接觸，會不會是這個？）？那麼正確的基於無gds資料的標準單元ASSURA LVS是什麼呢？
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, ]% |" C- D1 c( u8 |LVS用的 GDS 數據來自 Encounter ， streamout 的時候選擇將標準單元 pin 的名字導出並用相應的層號 map 。然後將此數據streamin到virtuoso（用默認設置），導入的版圖中標準單元內部只有 metal1層和相應pin的label。

9 S4 _, S% z; u# z4 ^; B多謝

veteran

就如你所說，正統的Assura blackbox flow就是要在extract rule中加入pinlayer的定義，然後使用?blackboxcell去run LVS。
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但改extract rule的過程，大約分成二步：
" d1 Q2 {" H' H( N+ C6 @/ G1. Add pinLayer() description in layerDefs() part
3 l" N1 r4 i5 B: v& J2. merge it with normal metal layer by using geomOr().

可參見以下sample:
===========================================================
drcExtractRules(
% G6 H! }8 c2 ZlayerDefs( "df2"
nwell = layer( "nwell" )
nimp = layer( "nimp" )
" Z' l3 F  e% h7 X5 W# }0 Opimp = layer( "pimp" )
# X: }* P/ y4 i0 P  loxide = layer( "oxide" )
- j1 l& ]% W' {5 B2 H* Upres = layer( "pres" )
! A* c, Y8 j2 f7 `4 [8 Opoly = layer( "poly" )
contact = layer( "contact" )
- J% @; `' ]3 [1 b7 bmetal1 = layer( "metal1" )
( ?  Q: g) R3 M' Y8 pvia = layer( "via" )
5 u! ?- \4 w3 T8 gmetal2 = layer( "metal2" )
! M9 k4 h% C1 hpolyPin = pinText( "poly" )
metal1Pin = pinText( "metal1" )
metal2Pin = pinText( "metal2" )
" g/ w1 g! P, h+ W" Zmetal1BBpin = pinLayer( "metal1" ) ;reads in dfII black box
5 M$ Q. E3 ^; p  }6 O9 [7 c% U0 zpins on metal1
+ `, w7 {( t2 U9 {6 lsubstrate = cellBoundary( "*" )
);end layerDefs section
& ]( u$ n8 R2 m. d# d% A7 d9 _;Define p-substrate region
;-------------------------
psub = geomAndNot( substrate nwell )
' ~6 j  f& \, ^' E, E8 s) R;Define device recognition shapes and device terminals
8 t0 ~+ w4 A$ t0 ~3 Z6 }9 v;----------------------------------------------------
ndiff = geomAnd( oxide nimp )
! E4 ]1 r  Z# A$ Q4 O, rpdiff = geomAnd( oxide pimp )
7 z7 x( F: t$ Y" dngate = geomAnd( ndiff poly )
nsd = geomAndNot( ndiff poly )
* H, {1 v$ J% [+ v% I# {' cpgate = geomAnd( pdiff poly )
psd = geomAndNot( pdiff poly )
0 G: W, l& J7 N  D  f8 ?9 W' ypresBody = geomAndNot( pres via )
presTerm = geomAnd( pres via )
;Merge black-box pins read in from pinLayer command with
* ?9 @) J1 b& @* Kconductive layer
' J& J/ Z6 W; g;---------------------------------------------------------------
--------
metal1 = geomOr( metal1 metal1BBpin )
. H' z/ ~' a1 q7 n5 s7 N;Define connectivity of layout
;-----------------------------
1 f; H0 J. q, _, y2 l6 ugeomConnect( via( via metal2 metal1 presTerm )
- r4 f2 o/ n8 fvia( contact metal1 poly nsd psd )
! Y8 B5 f. p! E/ ^' @1 mlabel( polyPin poly )
label( metal1Pin metal1 )
label( metal2Pin metal2 )
" a" G2 y- q7 m)
4 @8 @4 \% w: Q# fgeomStamp( psub psd error )
geomStamp( nwell nsd error )
....................
& _' U$ O% E; h8 Z6 t( }( w# F===========================================================

% `$ f, V  m2 |: y9 b試看看囉..
' w  R& [7 C# s7 a- ^; WVeteran