Grace 0.18µm uLL 1.8V/10V dual gate CMOS process

Data   Purpose
type
  0    drawing
  5    pin (for APR)
241    blockage

For instance, ordinary M1 pattern is with layer No. 31, data type 0, while M1 text is with layer No. 131, data type 0.  M1 dummy pattern is with layer No. 231, data type 0

Layer Layer   Data   Purpose
name    No.   type  
M1      31       0   drawing
M1     131       0   text (labe)
M1     231       0   dummy
M1      31     241   APR blockage
M1      31       5   APR pin

Converting layers during stream-in or stream-out

Sample "layer.map"


# Tool layer   tool layer   foreign layer   foreign data
# name         purpose      number          type

MT1  drawing   34   0
MT1  drawing5  134  0
MT2  drawing   36   0
MT2  drawing5  136  0

Stream in GDS 是以 foreign layer number 轉成我們需要的 (tool, e.g. Cadence or Laker layout tool) layer name。
Stream out GDS 是以 toll layer name 轉到 foreign layer number。
因為GDS file 內只記 layer number 不記 layer name。