Transcript Lambda rules

LAMBDA BASED PORTABLE CMOS
DESIGN RULES
LAMBDA IS HALF THE MINIMUM
WIDTH OF LINE.
(1)
N WELL
(2)
N WELL
(1) Minimum well side = 6 Lambda
(2)Minimum distance between two N wells or P wells
or one N well and one P well is 6 lambda.
(3) Minimum well area is 36 Lambda square.
Prof R.H.Khade, PIIT, New Panvel
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DIFFUSION
3
P+
Diffusion
2
P+
Diffusion
N+
4
N well polarization
1
5
N+
Diffusion
Prof R.H.Khade, PIIT, New Panvel
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Diffusion Rules
• (1) Minimum width of N+ or P+ diffusion or
implant is 3 lambda.
• (2) Minimum distance between two P+ or two N+
diffusions is 3 lambda.
• (3) Minimum distance between well boundry and
diffusion is 3 lambda.
• (4) Distance between N+ polarization and well
boundry is 3 lambda.
• (5) Minimum distance between N+ diffusion and
well boundry is 6 lambda.
Prof R.H.Khade, PIIT, New Panvel
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POLYSILICON
4
2
1
3
Prof R.H.Khade, PIIT, New Panvel
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• (1) Minimum polysilicon width = 2 Lambda.
• (2) Minimum distance between two polysilicon
stripes = 2 Lambda.
• (3) Extra polysilicon after diffusion = 2 Lambda.
• (4) Extra diffusion after polysilicon = 2 Lambda.
Prof R.H.Khade, PIIT, New Panvel
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CONTACTS
2
1
(1)Contact cut size = 2 Lambda X 2
Lambda.
(2)Distance between two contact cuts
= 2 Lambda.
Prof R.H.Khade, PIIT, New Panvel
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METAL PATTERN OVER
CONTACT CUT
1
1
Extra metal on all sides of contact cut = 1 Lambda.
Prof R.H.Khade, PIIT, New Panvel
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1
2
(1) Extra diffusion after contact cut = 2 Lambda
(2) Distance between contact cut and poltsilicon = 2 Lambda.
Prof R.H.Khade, PIIT, New Panvel
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METAL STRIPS
1
2
(1) Minimum metal width = 3 Lambda.
(2) Minimum distance between two metal strips = 3 Lambda.
Prof R.H.Khade, PIIT, New Panvel
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VIA
Minimum via size = 2 Lambda X 2 Lambda.
Minimum distance between two via = 2 Lambda.
Prof R.H.Khade, PIIT, New Panvel
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