Import Mentor Graphics庐 ExpeditionTM
PCB ASCII Files
Import/Export 2D/EDA FilesMentor Graphics Expedition
ExpeditionTM
PCB of Mentor Graphics庐 Corporation is a widespread layout software for
printed-circuit board (PCB) design. In order to be able to solve high-frequency
problems of PCB signal and power integrity, CST DESIGN ENVIRONMENTTM offers capabilities
for creating three-dimensional models from ExpeditionTM
PCB layouts.
Important note:
Starting from version 2007.3, Mentor Graphics Expedition generates ASCII
files only in encrypted format which is not readable directly by CST DESIGN
ENVIRONMENTTM.
A program for decrypting the files again can be obtained from Mentor Graphics
corporation. Alternatively, you can import ODB++ files which can be generated
by Mentor Graphics Expedition.
Creating the ASCII Database in ExpeditionTM PCB
In this part, we refer to ExpeditionTM
PCB, Version 2005, Service Pack 1.
Creating the ASCII database is straightforward.
By choosing FileExportASCII..., the following dialog appears.
Make sure to check all ".hkp"
files. Pressing the "OK" button will create the files in the
specified target directory. For later import into CST DESIGN ENVIRONMENTTM you
may copy the target directory (here "VBASCII") to a location
of your choice and/or rename it.
Notes:
The treatment of so-called "plane shapes"
of etch in ExpeditionTM
PCB is based on shape outlines which are maintained as essential layout
data. The filling of the shapes ("generated plane data") is
performed in an additional step (via the ExpeditionTM PCB "plane
processor") before manufacturing output. Please check that the plane
data have been generated before creating the ASCII files: Choose PlanesPlane Parameters & Processor..., which
opens the corresponding dialog box:
In this part, we refer to ExpeditionTM
PCB, Version 2005, Service Pack 1.
The conductor layers containing plane shape objects
are shown in the list "Plane Layers". When selecting a layer
the list "Nets For Selected Layer" displays the nets that involve
plane shapes. Please make sure that all layers in "Plane Layers",
and -for each layer- all nets in "Nets For Selected Layer" are
checked. Moreover, the option "Generate plane data" should be
enabled. The options contained in the tabs "Thermal Definition"
and "Clearances/Discard/Negative" can be left unchanged. The
tab "Hatch Options" offers some control of the amount of plane
data that will be generated: For too fine hatching, the plane data set
will be unnecessarily large, leading to longer geometry processing upon
3D model creation. For fully covered shapes, a coarse, vertical (or horizontal),
overlapping (i.e. Distance<Width) hatch pattern is recommended for
better performance. Pressing the "Process" button will generate
the plane data. Press "OK" to leave the dialog.
For further details on plane shape processing see
the ExpeditionTM
PCB documentation.
See also
The
EDA Import Overview
Importing
and Exporting Models
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