Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

What is Polygon and what is path in IC layout?

Status
Not open for further replies.

sathi.ec

Member level 1
Joined
Sep 29, 2005
Messages
41
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Location
Bangalore
Activity points
1,606
In an IC Layout, what is Polygon and what is path?
What are the advantages and disadvantages of each?

Thanks
Sathi
 

IC Layout

Polygon is used to draw complex shape of metal or poly.
Path usually to draw bus or interconnection straight.
 
Re: IC Layout

Paths are used to connect the general purpose interconnects , 90 degree bends...

Where as the polygons also serves the same purpose as that of the paths but these are more useful in drawing the 45 degree bends at the chip corners.
45 deg pathe are not acceptable ,u will get the offgrid errors.....by the tools like VLE,VXL..(Cadence)

vijay
 
Re: IC Layout

One main advantage of polygon over path is it aligns perfectly with grid for any angle.

Regards
 
Re: IC Layout

for path the width is set by default to the min width of that layer . it is very easy to draw for 90 degree . but for other angles polygons are used. with paths other than 90 degrees we get 'offgrid " errors
 

Re: IC Layout

we got offgrid errors while doing tapeouts and rectified them with polygons.
 

Re: IC Layout

Paths with 45 deg bends will definitely give the offgrid errors..
where asthe polygons with 45 deg wont give any offgrid errors...

vijay
 
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top