Layer Map Files
A layer map file tells Cadence how to convert between layers in a Cadence
layout and layers in a CIF or GDS
file. More detailed help can be found in the Cadence help on the
"Translator" product in the "Design Data Translator's Reference."
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Note: You do not always need a map file.
If you do not provide mapping information in a layer map file, the
translator creates layers with names based on the original layer number.
For example if the input layer number is 20, the Design Framework II layer
name is L20. The default layer purpose is drawing.
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GDS Layer Map
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Text File Format
#Cadence layer Cadence layer
Stream layer Stream data
#name
purpose number
type
#
metal
drawing 13,10,18
0-63
poly
drawing 40
0
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Notes
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Cadence layer purposes are listed in the LSW (layer window).
example:
dg = drawing
d1 = drawing1
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Generally, I use stream data type 0.
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If you specify a layer map table in the "Stream In" form, Import - Stream
translates only the layers that are listed; it does not translate layers
that are not listed in the mapping table.
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Stream layer numbers must be integers between 0 and 255. Numbers 1 through
127 are user defined, and 128 to 255 are reserved for system definition.
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PIPO can translate any of the 255 mapped Stream layers, but due to GDSII
format constraints, PIPO can translate only 64 different kinds of layers
in any one translation.
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CIF Layer Map
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Text File Format
#Cadence layer Cadence layer
CIF layer
#name
purpose name
#
substrate drawing
POLY
ntub
drawing METAL, LL
thinox
drawing1 15,L4,L5