The only reason I brought up using inner layers, is because as we have just
found out each design requires some special requirements. I have had tracks
that where impedance controlled on inner layers, and buried passives. The
only way to make sure that the board house knows what I want, I have to put
notes on some of those layers. I guess I like to make sure they don't miss a
thing. :)

Regards,

Ted

-----Original Message-----
From: Brad Velander [mailto:[EMAIL PROTECTED]]
Sent: Friday, May 17, 2002 3:26 PM
To: 'Protel EDA Forum'
Subject: Re: [PEDA] Too many hole sizes


Dwight,
        there was some acknowledgement of this in my message you quoted. You
are in a semi-unique situation which may be more common amongst the list
server members than I had realized. I have been slowly coming around to this
fact, doesn't mean that you/they can pronounce fab drawings as generally
unnecessary. As for your experiences, you and your fab shop are both
accepting some risk. The reason that some shops are specifically asking for
fab drawings is that they have decided that they don't want to accept the
risk.

        Since Ted raised the issue of documentation packages with layer
drawings, I want to say that in no way do I include individual layer
drawings in what I call a fab drawing. My fab drawings include only board
outlines, dimensions, drill symbols, requirements notes and acceptance
criteria. They are typically a one drawing page. Typically I would
characterize it as everything that is needed to check and accept the PCBs
after fabrication (without the necessity to confirm electrical connectivity,
that's done at the board shop).

Sincerely,
Brad Velander.

Lead PCB Designer
Norsat International Inc.
Microwave Products
Tel   (604) 292-9089 (direct line)
Fax  (604) 292-9010
email: [EMAIL PROTECTED]
http://www.norsat.com

Visit us at Booth 2G2-09 at CommunicAsia 2002 in Singapore June 18-21.



> -----Original Message-----
> From: Dwight [mailto:[EMAIL PROTECTED]]
> Sent: Friday, May 17, 2002 12:37 PM
> To: 'Protel EDA Forum'
> Subject: Re: [PEDA] Too many hole sizes
> 
> 
> Brad, don't forget there are many different Protel users (and 
> uses) on this
> list ... many doing prototypes, or working in (very) small 
> companies.  The
> proto houses I've used don't want PDFs or (heaven forbid!) 
> paper printouts,
> just the Gerbers.  So if they want to "see" the drill 
> drawing, they better
> have CAD/CAM software!
> 
> And the "loading dock" is my office, and I check the boards.
> 

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