Danny,
Man, I just hope you didn't get burned $$$wise on this. At least with
the appropriate netlist provided, and your.rpt files the fab house HAS
to eat these boards. I also hope you have found another fab house to
use, that won't NOT tell you what it does. They didn't tell you they
couldn't verify the gerbers? Unbelievable!
But, I still won't use 274X. :) I'm working with fab houses using the
ODB++ formats, and have Valor Enterprise. I thought Sceptor was for
Mentor users to verify WYSIWYG their gerbers. I've never heard of a fab
house using it.
Mitch :)
>Date: Thu, 22 Oct 1998 09:17:08 -0700
>To: "DesignerCouncil E-Mail Forum." <[log in to unmask]>,
> Mitch Morey <[log in to unmask]>
>From: Danny Gross <[log in to unmask]>
>Subject: Re: [DC] RS274X format problem
>
>Mitch,
>
>I always provide an IPC356 netlist to the fab house, however not all
fab
>houses can use it. As it turns out, the prototype fab house we use has
a
>verification software package called Royal Sceptor by Mentor Graphics.
I
>run a script which produced several ".rpt" files which they import for
>gerber verification against my CAD netlist. There is one BIG PROBLEM!
>This verification software cannot handle composites. I did not know
this
>and as a result the verification was not done and we did indeed get
back a
>bad board.
>
>Regards,
>
>Danny
>
>At 04:44 PM 10/21/98 PDT, you wrote:
>>Danny,
>>
>>I assume you also provided the fab house and IPC-356 netlist to verify
>>your gerbers. (????) If not, DO! I'm hearing so many horror stories on
>>fab houses only doing gerber-gerber generated netlists for comparison!
>>We've been burned 3 times in the last 6 months! They've even done it
>>when we did provide the 356 netlist! Unfortunately for me, the vendor
>>selection is out of my hands, but we are learning what the "low-cost"
>>vendors do. I'm just happy we have some great fab houses in the So.Cal
>>area! :)
>>
>>Do provide an "electrical netlist" to verify the gerber files! And
this
>>is especially true if you use 274X.
>>
>>Good luck.
>>
>>Mitch Morey
>>
>>(P.S. you can get a SKILL routine for IPC-356 generation from the
>>Cadence SourceLink site.)
>>
>>
>>>Date: Mon, 19 Oct 1998 13:48:27 -0700
>>>Reply-To: "DesignerCouncil E-Mail Forum."
>><[log in to unmask]>,
>>> Danny Gross <[log in to unmask]>
>>>From: Danny Gross <[log in to unmask]>
>>>Subject: Re: [DC] RS274X format problem
>>>To: [log in to unmask]
>>>
>>>I just recently submitted a RS274X output from Allegro Designer 13.0
to
>>a
>>>fab house that told me it would take them about 1 hour per layer to
>>process
>>>because of the number of composites. I had to resubmit the data in
>>>standard gerber format.
>>>
>>>Regards,
>>>
>>>Danny Gross
>>>
>>>At 08:49 PM 10/13/98 -0400, you wrote:
>>>>Hello,
>>>>
>>>>The fab house I'm using has encountered a problem importing my
RS274X
>>>artwork.
>>>>I believe their software is having a hard time compositing(?) the
>>power
>>>plane layers.
>>>>I'm still unsure what exactly is happening - I plan on visiting them
>>>tomorrow and see
>>>>first hand.
>>>>
>>>>My software (output) - Allegro designer - version 13
>>>>Theirs (Input) - Tibor Davos - version unknown.
>>>>
>>>>Has anyone else experienced any difficulties with RS274X formatted
>>power
>>>and ground planes
>>>>generated from Allegro??
>>>>
>>>>Any (I do mean ANY) help would be appreciated.
>>>>
>>>>Thanks
>>>>Dennis Ward
>>>>Net to Net Technologies
>>>>
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>>>---------------------------------------------------------------------------
>>>Danny Gross (408)430-1706
>>>PCB Design Eng. [log in to unmask]
>>>E-MU Systems, Inc.
>>Pager(408)421-3603
>>>Scotts Valley, CA
>>>
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>---------------------------------------------------------------------------
>Danny Gross (408)430-1706
>PCB Design Eng. [log in to unmask]
>E-MU Systems, Inc. Pager(408)421-3603
>Scotts Valley, CA
>
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