Subject: | |
From: | |
Date: | Mon, 8 Jan 1996 11:06:35 -0800 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Is there anyone who knows or can help me with the following:
I am trying to generate an IPC-D-356 netlist for a PCB that
has blind vias on it. The netlist is for a bare fab test.
I am not sure how the entry/entries should look in the netlist for
the connections that go from the TOP layer to the second layer
down on an 8 layer board. (blind via is from TOP to INS1 only)
Would I need a seperate line for each layer of the connection,
eg. one line for the TOP (01)connection information and then another
line entry for the INS1 (inner 02) layer information?
317TS_BUS58 VIA D 240PA01X+ 18520Y+154620X 240Y 240
327TS_BUS58 I VIA D 240PA02X+ 18520Y+154620X 240Y 240
What would be the entry for column 2 for the TOP layer portion
what would be the entry for column 2 for the INS1 layer portion
Would I need any information in columns 18,19 and 20 for the inner
layer portion of the net? (do I need the I?)
Is the VIA appropriate in 21-23?
I dont have much experience with this and have never output this format.
I am using a third party software that works, but does not seem to handle
the blind via definitions at this time. I need to manually define the
blind via descriptions to provide a complete netlist.
thanks in advance for any help.
Missy Kitlas
PC design
Sun Microsystems Inc.
|
|
|