Dielectric #, Dielectric Name, Permittivity Format (1=Re, Tand), Er, Tand, Permeability Format (1=Re, Tand), MUr, Tand, Dielectric Thickness, Vertical Starting Position (meters), Vertical Ending Position (meters), ?, ?, ?
Anyone know the last 3 parameters?
Same thing for the conductor layers further down in the file. Here, there are 13 parameters.
Anyone know the 2 parameters in the middle of the string?
I've not had any luck finding this in the online help.
The slm file format is an internal format even though it is ASCII and I do not think R&D will publish a definition in the forum. You may log a support call with EEsof and get that information (no promise!) But be aware that anything you do custom may not work in a future release if the format changes.
I suspect jtremblay may have been having the same issue I did and that's why he's looking at the slm file.
In my case, there appeared to be a conflict between what I was entering through the MoM UI for substrate definition and what was being written out the the slm file.
First, a layer named "VIA" was being placed in the slm file even though I did not map this layer through the UI.
Second, the layer that I wanted as a via was placed in the slm file but I'm fairly confident that the conductivity that I assigned in the UI was not reflected in the slm file.
However, the documentation in 310219 does not detail my other concern of incorrect information being written to the slm file.
When I looked at the slm file in a text editor, the via layer conductivity was incorrect (or not what I inputted through the MoM UI). I determined which field the conductivity was set in by looking at different metal layer in the slm that was correctly mapped.
Looking at that document 310219, that was a special case where a Momentum keyword was encountered in the layer definition file. Was your other issue related to the same type of technology file? In the short term, just make sure to rename a layer called "VIA" to something like "Via1" or "BoardVia" etc. You can always remap the layer names to other names if necessary when exporting.