NETEX-G Topics

Overview
• Introduction
• Applications
• User Interface
 
Inputs
• Gerber File Requirements
• Vias from Drill Data
• Layer Stackup
• Wire Bond Data
 
Assigning Nets and Nodes
• From ASCII Table
• From AIF
• From IPC356
• From GBRVU

Outputs
• ASCII Output
• Ansoft ANF
• Geometry Options
• GDSII
• DXF
 
Proximity Effect
• What is a Proximity Net?
• What is a Neighbor Net?
 
 
Extractions
• Extracting Nets
 
 
Netex Engine
• Program Flow
• Job File Syntax
• Command Line Syntax
• drl2gbr engine
• generating wire coords  

 

ANF for Si-Wave

Traces

SI-Wave uses different algorithms for planes and traces. For traces, the edge effect (i.e. capacitive coupling) is taken into account and is ignored for planes. Therefore a design which is expressed as all plane data (as we currently do in NETEX-G) will not simulate very well.

NETEX-G only produces plane data because its first step is to unionize all of the Gerber input data which results in only closed polygons. In order to pass out trace data into ANF we are attempting to re-introduce them by "recognizing" polygons that have the characteristics of traces.

Test Files

In order to refine this new trace recognition routine, we are collecting a wide range of Gerber files and converting them to ANF. We are then working closely with several users who will run SI-Wave and advise us if 1) we are getting all of the critical traces, 2) if we are correctly writing trace data as needed by SI-Wave.

The zipped files referenced below are test cases. They are zipped using a password because the files are proprietary customer files and only available under NDA. A code name, snapshot and short description are provided for each file.




Tahoe

tahoe
 

 

 

Layers: 4

Size: 4 x 4 inch

File: tahoe.zip 688 KB

file includes njb, gerber, ipc and anf. password protected.

 

AVH

avh
 

 

 

Layers: 10

Size: 9 x 9 inch

File: avh.zip 2.25 MB

Notes: includes njb, gerbers, ipc, anf. password protected.

 

AVC

avc
 

 

 

Layers: 14

Size: 14 x 13 inch

File: avc.zip 5.45 MB

File contains Gerbers, njb, anf, ipc. Most routing is on internal layers. This is a very demanding example. password protected.

 

Korea2

korea2
 

 

 

Layers: 4

Size: 94 x 94 mm

File: korea2.zip 337 KB

File contains Gerbers/drill, njb, anf,. This is a very simple example. Routes on top/bottom layer.not password protected.

 

CSR

csr
 

 

 

Layers: 6

Size: 37 x 14 mm

File: csr.zip 200 KB

File contains Gerbers/drill, njb, anf,. This is a multi-layer file with routes on top/bottom and inner layers.password protected.

 

Linda

linda
 

 

 

Layers: 2

Size: 1 x 0.75 inch

File: linda.zip 200 KB

File contains Gerbers/drill, njb, anf,. This is a 2 layer file with routes on top/bottom. Flexboard. Will be challenging.password protected.




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