ASSURA blackbox LVS问题请教

dyandwanzi

9 o4 I1 \- ?$ K3 ?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？
# L" \  n( R5 Z8 A/ s
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。
! b  c6 k. L% B) e* [* k* `" O2 Q
# i- f( V7 G. O( `$ V* h5 H. f6 }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。

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().
6 k  o; R+ S, b) s" R
可參見以下sample:
  |& w; Q( h$ z9 C2 ^===========================================================
drcExtractRules(
layerDefs( "df2"
' _8 U- o0 o" E0 @$ Qnwell = layer( "nwell" )
nimp = layer( "nimp" )
9 `" R/ P4 b/ u4 q. d3 j% Mpimp = layer( "pimp" )
oxide = layer( "oxide" )
pres = layer( "pres" )
poly = layer( "poly" )
& t$ p9 o- X* f2 N* V  }; Y4 pcontact = layer( "contact" )
2 U# R- U5 [, B' h- r5 ymetal1 = layer( "metal1" )
via = layer( "via" )
metal2 = layer( "metal2" )
2 _# |3 ?; g' V$ |6 [: MpolyPin = pinText( "poly" )
2 R9 \: I$ _/ d" H0 Tmetal1Pin = pinText( "metal1" )
metal2Pin = pinText( "metal2" )
metal1BBpin = pinLayer( "metal1" ) ;reads in dfII black box
pins on metal1
substrate = cellBoundary( "*" )
);end layerDefs section
;Define p-substrate region
7 a4 L" |- M6 L% h0 `3 `  B  ^;-------------------------
; @( T; u) t1 ppsub = geomAndNot( substrate nwell )
( p2 d+ E# q, ?- ^;Define device recognition shapes and device terminals
;----------------------------------------------------
3 |: f- M- o: W+ _1 E0 E" ^ndiff = geomAnd( oxide nimp )
3 N' N3 n0 W: `pdiff = geomAnd( oxide pimp )
ngate = geomAnd( ndiff poly )
- W6 R9 m  G: V  E* n6 insd = geomAndNot( ndiff poly )
pgate = geomAnd( pdiff poly )
/ K, m+ g; s  K+ D0 {/ lpsd = geomAndNot( pdiff poly )
# X/ e5 ?4 K0 _presBody = geomAndNot( pres via )
presTerm = geomAnd( pres via )
;Merge black-box pins read in from pinLayer command with
conductive layer
;---------------------------------------------------------------
--------
7 H# h- o2 q- T. l! J* Dmetal1 = geomOr( metal1 metal1BBpin )
;Define connectivity of layout
; A3 S! h& v) k) W3 n;-----------------------------
geomConnect( via( via metal2 metal1 presTerm )
- {" F7 c7 t/ u: o, o, k( dvia( contact metal1 poly nsd psd )
& e, e# ^4 B6 [label( polyPin poly )
4 S! f9 k* x' J- A  Zlabel( metal1Pin metal1 )
! |) n) N$ f1 n: X7 r2 {4 Nlabel( metal2Pin metal2 )
5 S0 p& k  L4 f)
2 W! m% n5 m8 Z1 A. AgeomStamp( psub psd error )
geomStamp( nwell nsd error )
....................
0 `' _3 o% J* z" K: X: D===========================================================

試看看囉..
Veteran