Single Via Contact to Double Via Contact

For IC5.1.41,

If you have access to sourcelink then Solution ID:11115668 would be good start.

or  

Please make the following changes in the ".cdsenv" file to achieve the desired.
 
1)  layout contactDefFromTechfile boolean nil
2) layout contactColumns int 2
 
Similarly you can use the below variables to do various default settings on the form :
layout contactColumns int 2
layout contactDefFromTechfile boolean nil
layout contactDelX float 0.0  
layout contactDelY float 0.0  
layout contactResetDelXY boolean t  
layout contactResetXYBias boolean t  
layout contactResetRowCol boolean t  
layout contactRows int 3  
 
For details on the envsetval function please refer the below doc :
http://sourcelink.cadence.com/docs/files/Release_Info/Docs/skuiref/skuiref5.0/skuiref.pdf

Thanks. I did found the same solution afterwards, at first my .cdsenv wasn't loading properly so i thought something wrong until i load it directly from my .cdsinit.

Thanks for the help. 

On the same question,

is it possible to  instanciate directly  a via contact without  opening or using  the "create contact"tool? for instance, by pressing "ctrl + 1" bindkey, i can instanciate a m1m2 via directly.

There are many ways we can automate this. most simple ways would be

 dbCreateSimpleMosaicByMasterName( deGetCellView()

                                            techGetTechLibName( ddGetObj( deGetCellView()->libName ))

                                            "via2"

                                            "symbolic"

                                            nil

                                            enterPoint()

                                            "R0"

                                            1

                                             2

                                             1.26

                                             1.26

            )

or

procedure( ViaCreate( viaName )

let( ( via2 llx lly urx ury ) 

 via2=dbOpenCellViewByType(

                                            techGetTechLibName( ddGetObj( deGetCellView()->libName ))

                                            viaName

                                            "symbolic"

                                    )

 urx = xCoord( upperRight( via2->bBox ))

 ury = yCoord( upperRight( via2->bBox ))

 llx = xCoord( lowerLeft( via2->bBox ))

 lly = yCoord( lowerLeft( via2->bBox ))

 dbCreateSimpleMosaic(

                    deGetCellView()

                    via2

                    enterPoint()

                    "R0"

                     2

                     2

                    urx-llx

                    ury-lly

            )

dbClose( via2) 

);let

);proc 

Bind this to ctrl+ bindkeys. 

or

Auto-Contact feature is sufficient most of the times. In IC6 it works for paths & polygons. 

Thanks Babji,

I tried your 1st code. i guess there's missing something, it's not working.

I relpaced "libName" - "our libName" (where the via is) and "via2" - "MT_AM" (which is the via i wanted to use)

I also added this bindkey to the code: 

hiSetBindKey("Layout" "Shift<Key>i" "dbCreateSimpleMosaicByMasterName()"

Your 2nd code,

same thing, i changed "libName" - "our libName" (where the via is), viaName - "MT_AM" (which is the via i wanted to use).

 Hi,

Do this..

  procedure( ViaCreate( viaName )
 dbCreateSimpleMosaicByMasterName( deGetCellView()

                                   techGetTechLibName( ddGetObj( deGetCellView()->libName ))

                                   viaName

                                   "symbolic"

                                   nil

                                   enterPoint()

                                   "R0"

                                            1
                                            2
                                            3.24
                                            1.26
                                              )
 );procedure

 hiSetBindKey("Layout" "Shift<Key>i" "ViaCreate( \"MT_AM\" )" )

 Yes you will get 2 vias when flattened. Obvious since you are placing an array of vias. I don't know how to place vias similar to  "Create Contact...".

Hi,

 I'm using the below constraint in the vcar rules file  before exporting. The VCAR is placing single via while routing

    list( '("tsmc18rf" "M2_M1" "symbolic") t)

But I dont know the rule to keep double contact/via in the router .Please help me.

Thanks,

Siva

Siva,

 I don't know about adding a constraint before starting the router.  I load a ".do" file in the router to make the routing of all of the nets use a 2x1 via array.  The do file contains the following command:

select all nets
define (class allnets (selected))
unselect all nets
circuit class allnets (use_via (use_array M2_M1 2 1))

-Phil

  Hello,

 Searching how to have automatically double via with "create contact" tool, I found this forum and your solution. I've added the two lines as you explained and now I have automatically double via. Very good solution and easy change.

 But now, if I instanciate a M2M1 contact and then a M1Poly contact which contact spacing is different, the deltaX and Y are not updated as before. For information, the width and the length are automatically updated.

Is it possible to have both automatically double via and the delta X/Y updated automatically?

   Thank you for your help.

It's not clear which version you're using or which "two lines" you are referring to (to me anyway).

I don't really understand your problem. Probably best to start a new thread rather than appending to an old one (as the Forum Guidelines clearly advise you not to do).

Andrew

   Hello Andrew,

 I understand that a new discussion would be better but my problem is the same as explained one in this old topic and my message was a reply of  Babji one posted the 5th of february 2010.

 I will try to be clear.

First, I use IC5.1.41.

My question : Default via contacts are single when instanciated with Create Contact tool. Is there an easy solution to have automatically double via contact when instanciated?

Solution : in this discussion, Babji suggested to make the following changes in the ".cdsenv" file.
1) layout contactDefFromTechfile boolean nil
2) layout contactColumns int 2

So I did it from my .cdsinit and I have automatically double via but now if I change the contact type which contact spacing is different, the Delta X and Delta Y parameters are not updated to follow the technology rules.

New question : is it possible to have automatically double via contact when instanciated with Create Contact tool without changing the other parameters that follow technology rules?

  Thank you for your help.