import a GDS file into virtuoso

In the "stream file" section, type in the name of the gds file

In the "Library" section, type in the new name of a library. This library name will be created by the translator.

For example, enter "mydesign". This field is a drop-down list but you can also enter text directly.

In the "attach Technology Library" field, click on the drop-down box and select the library that you created earlier (you said that this was successful).

 If everything is set up correctly, after translation you will see a library called "mydesign".

"Mydesign" will contain the results of the translation  The library  will be attched to the technology library that you created earlier.

There should also be  default layer colors defined so that when you open the layout viewsyou see colorful layout. If everything is yellow something has gone wrong.

Hope this helps

 Colin

 Hi,

After importing the GDS file into virtuoso, I have not any error or warning, but two major problems:
-> After displaying layout in the virtuoso,  metal 1 is not displayed and all contacts with the metal1 layer do not appear in my imported layout.
-> After the lvs, I receive a lot of warnings informing me that the transistors are not recognized.
Does any one have any explanation? I really need your help please!

Thanks!

Something went wrong, presumably!

Not enough info to go on - presumably the source data either didn't contain all the data, or the data was mapped onto the wrong Virtuoso layers.

This thread seems to have become a dumping ground for random unrelated stream import issues...

Andrew.

 Here's what I've done:

I created a counter in schematic virtuoso, after that I created its symbol.

Whith ENCOUNTER i generated its layout, I routed it but I clould not do Timing delay I don't know why?

After I saved in gds file: Map File=> streamOut.map; Library Name=> DesigneLib; I checked "Uniquify Cell Names" and "White abstract information for LEF Macros"

To import it: file- import- stream  then I just checked "Generate Technology Information From Stream File" then apply 

Then here I have not any error or warning !

The problem then, is the fact that the layout isn't imported correctly since the metal1 and all the connections made of metal1 aren't displayed (or not imported). 

In addition to that, while running the lvs, I obtain a lot of warnings informing me that all my transistors aren't recognized.

I don't know if I need to detail more ? that's exactly all what I did ! Can you please have any explanation. 

Thanks for your patience! 

I too am trying to stream in a gds file into virtuoso. I followed the steps said above. 

The technology file is being generated. But it is not appearing in the drop down menu for attachTechnologyLibrary field.

So I manually typed in the relative path to that file and tried streaming in. But there was an error saying the tech file name myDesign.tf does not exist in the UnixNameSpace. 

Can somebody please suggest a solution to the problem? 

Which version of the tools are you using?

If you have one, I'd say you'd be better off starting by importing the GDS into a library attached to an existing technology library for the technology in question. Of course, if you don't have that or an ASCII technology file, doing a stream in and generating the technology info may be your only choice.

Andrew.

I tried importing the gdsii into a library attached to anexisting technology library and it worked !

Thank you!

 I have the netlist and gdsii of a DB. Is there any way by which I can map the instance names in the netlist to the gdsii file so that when I import the gds into virutoso and write out a DEF,it will contain the same instance names as that in the netlist.

Now when I write out the DEF it conatins default instance names like I__0,I__1 etc .

Taking a stream file (aka GDSII) and importing it and then being able to export DEF is far from trivial. You might be able to do it if you can get Virtuoso Layout Suite XL to recognize the layout devices and match against a source schematic - there's some new options in IC616 VLS XL which will help with that (Update Binding) - but even then I think it's quite a tough challenge.

Why do you want to do this? Stream format has no connectivity information, so it's not really the best format if you want to represent logical connectivity...

Andrew.