ASSURA blackbox LVS问题请教

dyandwanzi

$ ]' R& X+ q1 [. |7 C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 Z5 F& @& y. W7 R. O% U. }2 ^( u
) b; o! R+ A4 J( ?5 t. d9 rLVS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。

7 S2 Y4 Z% x) r& o, O6 i' Q% t, M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。

( r& c: B& l5 @, }# Q" y1 c但改extract rule的過程，大約分成二步：
7 U. u% M  H2 a: _7 @! ?" }1. Add pinLayer() description in layerDefs() part
2. merge it with normal metal layer by using geomOr().

可參見以下sample:
2 k/ s0 _8 Q- n4 O0 Q===========================================================
drcExtractRules(
- A% @7 A0 w* blayerDefs( "df2"
nwell = layer( "nwell" )
! k9 P( N  _3 F9 k% g+ \nimp = layer( "nimp" )
+ ]& X% m$ Z: X4 p: I! _pimp = layer( "pimp" )
oxide = layer( "oxide" )
0 P+ Q2 z6 G4 ~! X" f* Lpres = layer( "pres" )
poly = layer( "poly" )
contact = layer( "contact" )
6 W) i7 _- O6 _/ I  l8 J& ?metal1 = layer( "metal1" )
  f% ^/ Y2 k2 n  v: L5 M3 ^8 uvia = layer( "via" )
9 m, T5 Y" P. C: tmetal2 = layer( "metal2" )
polyPin = pinText( "poly" )
0 Y& m7 H" I4 l! lmetal1Pin = pinText( "metal1" )
* L3 m+ I, U' r8 `, Gmetal2Pin = pinText( "metal2" )
metal1BBpin = pinLayer( "metal1" ) ;reads in dfII black box
pins on metal1
, d( n- A" \1 z: u& {0 qsubstrate = cellBoundary( "*" )
);end layerDefs section
# A" g9 O; e) K6 `! {7 O;Define p-substrate region
;-------------------------
psub = geomAndNot( substrate nwell )
. e1 i2 @7 J$ A/ z2 N# {, M. [- B;Define device recognition shapes and device terminals
;----------------------------------------------------
: {/ x) C% g3 P) N  T2 C# dndiff = geomAnd( oxide nimp )
% f; d# g, d0 g, D* q/ fpdiff = geomAnd( oxide pimp )
( c# C  ~, \3 Rngate = geomAnd( ndiff poly )
, t- x' }9 M# y% [& Mnsd = geomAndNot( ndiff poly )
pgate = geomAnd( pdiff poly )
psd = geomAndNot( pdiff poly )
presBody = geomAndNot( pres via )
. Q3 N9 K' W: apresTerm = geomAnd( pres via )
;Merge black-box pins read in from pinLayer command with
6 p. N3 @  h) A* Z; o# |conductive layer
/ f5 l4 `7 u, x;---------------------------------------------------------------
' h0 Z4 O# R- ?4 e--------
metal1 = geomOr( metal1 metal1BBpin )
;Define connectivity of layout
;-----------------------------
geomConnect( via( via metal2 metal1 presTerm )
via( contact metal1 poly nsd psd )
label( polyPin poly )
label( metal1Pin metal1 )
label( metal2Pin metal2 )
)
- T: q" z- k' D# F; ggeomStamp( psub psd error )
. \1 C9 [0 ]+ R) ]4 xgeomStamp( nwell nsd error )
....................
===========================================================
; l  @& o! [5 M# N) g
試看看囉..
Veteran