ASSURA blackbox LVS问题请教

dyandwanzi

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. A; W' {: {2 N9 Q6 n6 J0 ]! W5 `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？

5 e6 l" |0 S1 i( V1 FLVS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。

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：
1. Add pinLayer() description in layerDefs() part
2. merge it with normal metal layer by using geomOr().

可參見以下sample:
===========================================================
drcExtractRules(
! X; B4 _; R" ylayerDefs( "df2"
nwell = layer( "nwell" )
; }( F/ P% t! F6 Hnimp = layer( "nimp" )
pimp = layer( "pimp" )
oxide = layer( "oxide" )
- t$ M& s& ^3 Ypres = layer( "pres" )
poly = layer( "poly" )
contact = layer( "contact" )
metal1 = layer( "metal1" )
  q6 E  P* [1 E0 [via = layer( "via" )
4 Z  n+ M% y7 k5 ^metal2 = layer( "metal2" )
( @$ D9 B+ V2 U  ^polyPin = pinText( "poly" )
/ w  m$ }1 q+ i1 `7 ^8 t- Jmetal1Pin = pinText( "metal1" )
0 W- J, G( B# ]5 W- A1 cmetal2Pin = pinText( "metal2" )
1 E. _- P$ b& Umetal1BBpin = pinLayer( "metal1" ) ;reads in dfII black box
pins on metal1
substrate = cellBoundary( "*" )
);end layerDefs section
;Define p-substrate region
' c7 U; T3 C  F, l; Q  e8 c;-------------------------
2 m+ |/ M8 {& lpsub = geomAndNot( substrate nwell )
;Define device recognition shapes and device terminals
;----------------------------------------------------
ndiff = geomAnd( oxide nimp )
pdiff = geomAnd( oxide pimp )
& u; D6 n, j: ]6 C  _ngate = geomAnd( ndiff poly )
nsd = geomAndNot( ndiff poly )
4 {1 h. p  H" {  r7 _pgate = geomAnd( pdiff poly )
psd = geomAndNot( pdiff poly )
presBody = geomAndNot( pres via )
presTerm = geomAnd( pres via )
& C2 X! c1 z. Z7 h" B, I7 _% v;Merge black-box pins read in from pinLayer command with
) A# ]. _" X9 v" u# ?0 J  ?conductive layer
;---------------------------------------------------------------
0 `# e# W4 f0 d9 p--------
0 ]* a: _8 c6 H. G& Q0 L: U3 M5 {metal1 = geomOr( metal1 metal1BBpin )
;Define connectivity of layout
;-----------------------------
9 A. d# v6 B8 `, G$ J; F/ ]0 ^  xgeomConnect( via( via metal2 metal1 presTerm )
via( contact metal1 poly nsd psd )
label( polyPin poly )
- Q& o2 N5 L! G! r8 Ulabel( metal1Pin metal1 )
label( metal2Pin metal2 )
)
geomStamp( psub psd error )
geomStamp( nwell nsd error )
9 D% i# H8 [1 U; Q! G....................
0 n5 Z6 I- K. U1 n1 B' a" B===========================================================
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5 q% c- ~% e0 k試看看囉..
Veteran