Stats

  • Locked Locked
  • Replies 2
  • Subscribers 143
  • Views 14373
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Subtraction Between two layers?

murtazaak

 

 Hi,

I just started cadence couple of days back for designing my patterns, I wanted to subtract two layers and already wrote a code but not sure its a right one or not. Could anyone help me please and let me know is this a right on or not,

 load("/usr/cdscad/libw/utils/rectw.il")


procedure( subtraction( @optional origin ww tlength outlayer)
(prog (xx yy np xo yo lw)

   subl1 = nil
   subl2 = nil

   xo = xCoord(origin)
   yo = yCoord(origin)
   


;; Draw First rect Layer

   xx = xo
   yy = yo-ww/2.0
   r = rectw(xx yy tlength ww "metal1")
 subl1 = append(subl1, list(r))

;; Draw Second rect Layer

   xx = xo
   yy = yo-ww/2.0
   r = rectw(xx yy tlength ww "metal2")
  subl2 = append(subl2, list(r))

dbLayerAndNot((getEditRep) outlayer subl1 subl2)

)

)

 

Thanks

Parents

  •  Hi Melaka,

    First of all thanks for your reply, I think you are right that I didn't clearify the things in detail. I am designing the program first in Cadence. For that I am using icfb for compiling, gedit as a editor for writing my code and output of program can see in Virtuoso. Now as I mentioned the code in my previous post, actually I am creating two metal(polygon) layers on exactly same location (both layers x-axis and y-axis are same). Let suppose Layer1 and Layer2 has two layers on same location, obviously when my output come on Virtuoso I can see only one Layer but Layer1 and Layer2 should be behind it which I can't see because of same location. Now what I want is that I can subtract from Layer1 to Layer2 or vise versa so that when my output come on Vituoso it shows only Layer1 not Layer2.

    Actually I am desiging first my patterns in Cadence then I have to use E-line(lithography) on Silicon chip to write these patters. I am facing the problem that temporary my layer1 is subtract to other layer2 otherwise on E-line it write both layers that make the chip worse.

    Hope I explained in detail if not so then please ask again,

     

    Cheers

     

     

Reply

  •  Hi Melaka,

    First of all thanks for your reply, I think you are right that I didn't clearify the things in detail. I am designing the program first in Cadence. For that I am using icfb for compiling, gedit as a editor for writing my code and output of program can see in Virtuoso. Now as I mentioned the code in my previous post, actually I am creating two metal(polygon) layers on exactly same location (both layers x-axis and y-axis are same). Let suppose Layer1 and Layer2 has two layers on same location, obviously when my output come on Virtuoso I can see only one Layer but Layer1 and Layer2 should be behind it which I can't see because of same location. Now what I want is that I can subtract from Layer1 to Layer2 or vise versa so that when my output come on Vituoso it shows only Layer1 not Layer2.

    Actually I am desiging first my patterns in Cadence then I have to use E-line(lithography) on Silicon chip to write these patters. I am facing the problem that temporary my layer1 is subtract to other layer2 otherwise on E-line it write both layers that make the chip worse.

    Hope I explained in detail if not so then please ask again,

     

    Cheers

     

     

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.