In order to run NETEX you must define a stackup - how the various layers are stacked together to form a multi-layer board.

In the NJB file the stackup section looks as follows:

B_LAYERS 
1 WB     WIREBOND  0  CU  0x0000FF  5.8E+07 1.0 0.999991
2 TMSK   SMASK   100  PLY 0xCCCCCC  0.0E+00 4.4 0.000000 
3 M1     METAL    35  CU  0xFF0000  5.8E+07 1.0 0.999991
4 CORE   DIEL    100  FR4 0x555555  0.0E+00 4.4 0.000000 
5 M2     METAL    35  CU  0xFF0000  5.8E+07 1.0 0.999991 
E_LAYERS 

Column Definitions

Column 1 - stackup number. The very top starts at 1 and increases as you drill down through the stackup.

Column 2 - layer name. This is a name you assign this layer. You are free to use any name but generally it should not contain more than 32 characters and should not have any spaces or special characters in it.

Column 3 - layer type. There are several different layer types: WIREBOND for wire layers, DIEL for dielectric layers, METAL for conductor layers, and SMSK for solder mask layers. Solder mask layers are a special type of dielectric layer since dielectric layers have no Gerber data associated with them but solder mask layers typically do have a Gerber file that defines the openings.

Column 4 - thickness. The thickness in whatever units you are working in.

Column 5 - material. A string representing the material for this layer. NETEX does not use this information and the only limitation is that the name not exceed 32 characters and that it not have spaces or special characters in it.

Column 6 - color. This is an RGB hex triplet (i.e. the 0x indicates hex, the next two characters are the red value in hex 00-FF and so on. Pure red would be 0xFF0000.This column is not used by NETEX but the info is passed to the output.

Column 7 - conductivity. NETEX does not use this info.

Column 8 - dielectric constant. NETEX does not use this info.

Column 9 - permeability. Netex does not use this info.

The layer section must begin with b_layers and end with e_layers. It is generally the first section in the NJB file. The stackup position is absolutely critical since every other directive and assignment always refers to this stackup position.

JOB File Syntax:     1   |   2   |   3   |   4   |   5   |   6   |   7   |   8   |   9   |   10   |   11   |   12   |   13