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wls
Joined: 26 Jul 2001
Posts: 104
Location: Singapore
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 30 Jun 2006 10:51 routing encounter problem |
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Hello . I am using cadence encounter for p&r . But the 0.5 pdk that I use
uses 2 metal layer . Cadence report that max route layer must be 3 ?
Is there ayn fix on this ?
Thx.
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cdic
Joined: 28 Jun 2001
Posts: 155
Helped: 2
Location: silly valley
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01 Jul 2006 6:47 Re: Cadence encounter 2 metal layer problem |
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| Quite interesting, how come you only need 2 metal layer for your design? You don't need power ring/mesh/rail? and I don't think there are 2 layer metal process/library avaliable in the foundry.
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Narasaiah
Joined: 17 Jul 2006
Posts: 7
Helped: 1
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17 Jul 2006 17:57 Cadence encounter 2 metal layer problem |
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hi,
For this just use Wroute for Routing.
But how come you only need 2 metal layer for your design?
bye
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Google
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17 Jul 2006 17:57 Ads |
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jelydonut
Joined: 27 Dec 2002
Posts: 370
Helped: 3
Location: Inside your MOM!
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19 Jul 2006 17:27 Re: Cadence encounter 2 metal layer problem |
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I have seen 2 metal 0.5um processes.. cheaper than 3 metal.. although you wouldn't be able to abut and flip the cells together as you would need routing channels inbetween.
jelydonut
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CatKing
Joined: 05 Jun 2001
Posts: 277
Helped: 1
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03 Nov 2006 18:11 Cadence encounter 2 metal layer problem |
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for .5 process, 3M better.
because 1st metal always used by cell layout, most of these areas are not available for routing, but for success routing, you need at lease 2 layers, M2 for horizontal routing and M3 for vertical.
so the 3M is the better choice for APR, 2M better for hand craft layout.
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