To change MinSpacing rule in DRD when length of metal1 is large

Look in the documentation. In cdsdoc (I believe from previous posts that you're using IC5141), search for "DRD". You'll find a search result Virtuoso Layout Editor Turbo User Guide -- 2. Design-Rule-Driven Editing (this was the first hit in my case). I clicked on that, and then went to the Supported Rules section. If you scroll down a bit, you'll find Minimum Spacing Parallel Run Length (as well as Minimum Spacing further up), with examples of the technology file requirements for each as well as pictures showing you what everything means.

Andrew.

 Hi Andrew,

                 Thanks for sharing your knowledge. I wrote following code in techfile which shows error while loading it.

 Compiling class 'controls'....

 Compiling class 'layerDefinitions'....

 Compiling class 'layerRules'....

 Compiling class 'physicalRules'....

*WARNING* *Error* tableSpacingRules: argument #1 should be a list (type template = "l") -  minSpacing

Compiling class 'devices'....

 *WARNING* The function of the cut layer of cdsVia 'M1_M2c' must be defined as 'cut' or 'li'.

 *WARNING* Add the definition to the layerFunctions subclass of the layerRules class in the

 *WARNING* technology file, either through the Technology File Tool Box or by dumping, editing,

 *WARNING* and reloading the technology file. Then create the cdsVia device.

 Compiling class 'lxRules'....

*WARNING* Failed to load technology file from file '/remote/projects/micrel/MICBCD05/ICFB/venu1/Aciifile.il'.

my code is:

physicalRules(
 spacingRules(
 ;( rule                        layer1          layer2          value    )
 ;( ----                        ------          ------          -----    )
  ( minSpacing                  "MET1"                  0.6      )
  ( minSpacing                  "VIA"                   0.6      )
  ( minSpacing                  "MET2"                  2.0      )
  ( minSpacing                  "MET3"                  0.7      )
  ( minSpacing                  "ACT"                   0.9      )
  ) ;spacingRules

 orderedSpacingRules(
 ;( rule                        layer1          layer2          value    )
 ;( ----                        ------          ------          -----    )
  ( minEnclosure                "MET1"          "VIA"           0.3      )
  ( minEnclosure                "MET2"          "VIA"           0.7      )
  ( minEnclosure                "MET2"          "VIA2"          0.3      )
  ( minEnclosure                "MET3"          "VIA2"          0.3      )
  ( minEnclosure                "NWELL"         "BL"            4.0      )
 ) ;orderedSpacingRules

 mfgGridResolution(
      ( 0.001000 )
 ) ;mfgGridResolution
tableSpacingRules(" minSpacing" "MET1"
("width" nil nil "length" nil nil )
(
(0.6 0 ) 0.6
(0.6 20) 0.8
)
)
) ;physicalRules

If you look in both the same DRD support rules part of the manual, or in the ASCII technology file syntax manual, you'll see that tableSpacingRules expects to have each rule definition in parentheses (just as you have in spacingRules and orderedSpacingRules). So you're missing a set of parentheses around the entire minSpacing rule. I don't think minSpacing has to be in quotes (I didn't try your example - not enough time) - but I'm sure it shouldn't have spaces within the quotes either.

Actually the error message was pretty explicit as to what was wrong, especially in conjunction with the manuals.

Andrew.