**0: LAYER NAME.**

This section explicits the layer name used in the following rules.

`- NWELL : N well
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- NTIE : N well polarisation

- PTIE : P substrat polarisation

- NDIF : N diffusion

- PDIF : P diffusion

- GATE : transistor gate

- POLY : polysilicon wire

- ALU1 : first level of metal

- ALU2 : second level of metal

- CONT : contact between ALU1 and POLY or DIFF

- VIA : contact between ALU1 and ALU2

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**I: LAYER WIDTH.**

This class of rules deals with the width limits of a layer.
and the conditions for equipotentiality between
two overlapping or abutting segments.

rule 1 :
the minimum width for a segment of NWELL is 4
corresponding error codes are : 100 101

rule 2 :
the minimum width for a segment of NTIE is 2
corresponding error code is : 119

rule 3 :
the minimum width for a segment of PTIE is 2
corresponding error codes are : 122 123

rule 4 :
the minimum width for a segment of NDIF is 2
corresponding error codes are : 140 141

rule 5 :
the minimum width for a segment of PDIF is 2
corresponding error codes are : 165 166

rule 6 :
the minimum width for a segment of GATE is 1
corresponding error codes are : 234 235

rule 7 :
the minimum width for a segment of POLY is 1
corresponding error codes are : 234 235

rule 8 :
the minimum width for a segment of ALU1 is 1
corresponding error codes are : 238 239

rule 9 :
the minimum width for a segment of ALU2 is 2
corresponding error codes are : 242 243

rule 10 :
the width of a CONT must be equal to 1
corresponding error codes are : 246 247

rule 11 :
the width of a VIA must be equal to 1
corresponding error codes are : 261 262

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**II: FORBIDDEN OVERLAP**
This class of rules specifies the forbidden overlaps between two layers. (The distance between them must be strictly positive)

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rule 12 :
contact between PTIE and NWELL is forbidden.
corresponding error codes are : 126 127 128 129 130 131

rule 13 :
contact between PTIE and NTIE is forbidden.
corresponding error codes are : 133 134 135 136 137 138

rule 14 :
contact between NDIF and NWELL is forbidden.
corresponding error codes are : 144 145 146 147 148 149

rule 15 :
contact between NDIF and NTIE is forbidden.
corresponding error codes are : 151 152 153 154 155 156

rule 16 :
contact between NDIF and PTIE is forbidden.
corresponding error codes are : 158 159 160 161 162 163

rule 17 :
contact between PDIF and NTIE is forbidden.
corresponding error codes are : 169 170 171 172 173 174

rule 18 :
contact between PDIF and PTIE is forbidden.
corresponding error codes are : 176 177 178 179 180 181

rule 19 :
contact between PDIF and NDIF is forbidden.
corresponding error codes are : 183 184 185 186 187 188

rule 20 :
contact between GATE and NTIE is forbidden.
corresponding error codes are : 191 192 193 194 195 196

rule 21 :
contact between GATE and PTIE is forbidden.
corresponding error codes are : 198 199 200 201 202 203

rule 22 :
contact between POLY and NTIE is forbidden.
corresponding error codes are : 207 208 209 210 211 212

rule 23 :
contact between POLY and PTIE is forbidden.
corresponding error codes are : 214 215 216 217 218 219

rule 24 :
contact between POLY and NDIF is forbidden.
corresponding error codes are : 221 222 223 224 225 226

rule 25 :
contact between POLY and PDIF is forbidden.
corresponding error codes are : 228 229 230 231 232 233

rule 26 :
contact between CONT and GATE or POLY is forbidden.
corresponding error codes are : 249 250 251 252 253

rule 27 :
contact between VIA and GATE is forbidden.
corresponding error codes are : 264 265 266 267 268 269

rule 28 :
contact between VIA and POLY is forbidden.
corresponding error codes are : 271 272 273 274 275 276

rule 29 :
contact between VIA and CONT is forbidden.
corresponding error codes are : 278 279 280 281 282 283

rule 30 :
contact between NTIE and NWELL is forbidden.
corresponding error code is : 109

rule 31 :
contact between PDIF and NWELL is forbidden.
corresponding error code is : 117

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**III: LAYER NOTCH.**

This class of rules deals with the notch limits of a layer.

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rule 32 :
the minimum notch for a segment of NWELL is 4
corresponding error code is : 102

rule 33 :
the minimum notch for a segment of NTIE is 2
corresponding error code is : 120

rule 34 :
the minimum notch for a segment of PTIE is 2
corresponding error code is : 124

rule 35 :
the minimum notch for a segment of NDIF is 2
corresponding error code is : 142

rule 36 :
the minimum notch for a segment of PDIF is 2
corresponding error code is : 167

rule 37 :
the minimum notch for a segment of POLY is 1
corresponding error code is : 236

rule 38 :
the minimum notch for a segment of ALU1 is 2.5
corresponding error code is : 240

rule 39 :
the minimum notch for a segment of ALU2 is 2
corresponding error code is : 244

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**IV: MINIMUM SPACING**

This class of rules specifies the minimum edge-to-edge distance allowed between
two layers.

`rule 40 :
the minimum distance between NWELL and NWELL is 12
corresponding error code is : 118
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rule 42 :
the minimum distance between NTIE and NTIE is 3
corresponding error code is : 121

rule 43 :
the minimum distance between PTIE and NWELL is 7.5
corresponding error code is : 125

rule 44 :
the minimum distance between PTIE and NTIE is 8
corresponding error code is : 132

rule 45 :
the minimum distance between PTIE and PTIE is 3
corresponding error code is : 139

rule 46 :
the minimum distance between NDIF and NWELL is 7.5
corresponding error code is : 143

rule 47 :
the minimum distance between NDIF and NTIE is 8
corresponding error code is : 150

rule 48 :
the minimum distance between NDIF and PTIE is 3
corresponding error code is : 157

rule 49 :
the minimum distance between NDIF and NDIF is 3
corresponding error code is : 164

rule 51 :
the minimum distance between PDIF and NTIE is 3
corresponding error code is : 168

rule 52 :
the minimum distance between PDIF and PTIE is 8
corresponding error code is : 175

rule 53 :
the minimum distance between PDIF and NDIF is 8
corresponding error code is : 182

rule 54 :
the minimum distance between PDIF and PDIF is 3
corresponding error code is : 189

rule 55 :
the minimum distance between GATE and NTIE is 1
corresponding error code is : 190

rule 56 :
the minimum distance between GATE and PTIE is 1
corresponding error code is : 197

rule 57 :
the minimum distance between GATE and NDIF is 1
corresponding error code is : 204

rule 58 :
the minimum distance between GATE and PDIF is 1
corresponding error code is : 205

rule 59 :
the minimum distance between GATE and GATE is 2
corresponding error code is : 237

rule 60 :
the minimum distance between POLY and NTIE is 1
corresponding error code is : 206

rule 61 :
the minimum distance between POLY and PTIE is 1
corresponding error code is : 213

rule 62 :
the minimum distance between POLY and NDIF is 1
corresponding error code is : 220

rule 63 :
the minimum distance between POLY and PDIF is 1
corresponding error code is : 227

rule 64 :
the minimum distance between POLY and GATE is 2
corresponding error code is : 237

rule 65 :
the minimum distance between POLY and POLY is 2
corresponding error code is : 237

rule 66 :
the minimum distance between ALU1 and ALU1 is 2.5
corresponding error code is : 241

rule 67 :
the minimum distance between ALU2 and ALU2 is 2
corresponding error code is : 245

rule 68 :
the minimum distance between CONT and CONT is 3
corresponding error code is : 254

rule 69 :
the minimum distance between VIA and GATE is 2
corresponding error code is : 263

rule 70 :
the minimum distance between VIA and POLY is 2
corresponding error code is : 270

rule 71 :
the minimum distance between VIA and CONT is 2
corresponding error code is : 277

rule 72 :
the minimum distance between VIA and VIA is 3
corresponding error code is : 284

rule 73 :
the minimum distance between CONT and GATE or POLY is 1.5
corresponding error code is : 248

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**V: TOTAL INCLUSION.**

The last class of rules deals with the inclusion of a layer in another one.

`rule 74 :
NTIE must be included in NWELL with a minimun margin of 0.5
corresponding error code is : 103
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rule 75 :
PDIF must be included in NWELL with a minimun margin of 0.5
corresponding error code is : 110