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？

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。

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。

9 E3 z* Y- c5 o; c% C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:
===========================================================
; |1 S3 P2 Y7 d- IdrcExtractRules(
8 @- M) f/ g, x& [  Q% elayerDefs( "df2"
( R9 W) Q, X0 p7 R1 ?2 T2 I& Pnwell = layer( "nwell" )
nimp = layer( "nimp" )
pimp = layer( "pimp" )
oxide = layer( "oxide" )
pres = layer( "pres" )
poly = layer( "poly" )
contact = layer( "contact" )
9 M( o, l$ ~; G1 H; e) Lmetal1 = layer( "metal1" )
via = layer( "via" )
metal2 = layer( "metal2" )
polyPin = pinText( "poly" )
# n9 w& V8 W' E5 bmetal1Pin = pinText( "metal1" )
metal2Pin = pinText( "metal2" )
metal1BBpin = pinLayer( "metal1" ) ;reads in dfII black box
pins on metal1
substrate = cellBoundary( "*" )
; ]% a# z1 r' x: Z* K2 p; q8 m: E);end layerDefs section
;Define p-substrate region
# f3 R2 k4 R) H2 \;-------------------------
3 q. x0 g' p$ l) Y: |8 Q1 C( upsub = geomAndNot( substrate nwell )
;Define device recognition shapes and device terminals
, I/ G/ Y# @6 O;----------------------------------------------------
2 o& F) ?9 M' l; A& d$ y- `# \ndiff = geomAnd( oxide nimp )
pdiff = geomAnd( oxide pimp )
ngate = geomAnd( ndiff poly )
nsd = geomAndNot( ndiff poly )
% o& G( ~6 ]* t5 j0 \pgate = geomAnd( pdiff poly )
psd = geomAndNot( pdiff poly )
; w# B, x. C8 A  lpresBody = geomAndNot( pres via )
; s; W4 ^+ @* ]5 m# l( D2 G2 a" TpresTerm = geomAnd( pres via )
6 d/ l& @5 w) m;Merge black-box pins read in from pinLayer command with
. T# Q' S- @0 ?; l3 ?  yconductive layer
;---------------------------------------------------------------
--------
metal1 = geomOr( metal1 metal1BBpin )
;Define connectivity of layout
. m8 H4 c4 x# T* x# @;-----------------------------
geomConnect( via( via metal2 metal1 presTerm )
via( contact metal1 poly nsd psd )
0 R, W! c: G+ ]4 F1 {' o& @label( polyPin poly )
label( metal1Pin metal1 )
8 {6 Q( q8 R: v- ~9 o1 zlabel( metal2Pin metal2 )
! h  X- o  M( I2 V8 M! U/ t)
geomStamp( psub psd error )
2 C! ]6 O. T! m- a1 w; G9 fgeomStamp( nwell nsd error )
....................
+ X! A" Z$ G% l  i8 \$ t===========================================================
$ y# o+ g6 d* Q1 K6 U4 V, `3 j
試看看囉..
2 e( `9 w5 |5 {Veteran