The reason for the flip "change vendors" comment is a lack of
     confidence in vendors who are far behind the technology corve.
     Unfortunately  don't remember your exact comment about the fabricator,
     but when I hear board shops give answers that indicate they
     primitiveness, it burns me up. (As I get older I seem to have less
     patience). Board fabrication has come a long way just in the last few
     years and vendors are working with engineering to build better
     product. Of course people who do the layout should do their utmost to
     inprove manufacturability, but personally I've found that shops that
     do not keep up have more than the problem that is evident.
     There are benefits and drawbacks to your question - you are the one
     who will have to make the decision - if the benefits of removing pads
     out weigh the fabricators concerns (dull bits?) then remove the pads.
     I am uncomfortable with the board shop doing this. What if they remove
     one they shouldn't ? Most current software will do this for you and
     allow you to review it.
     Sorry if the first answer sounded flip. But if you are not happy with
     your fabricator's answer, then what are your alternatives?

     Respectfully,
     Pete Waddell


______________________________ Reply Separator _________________________________

Subject: Re: Inner layer PAD Suppression or NOT?
Author:  [log in to unmask] at Internet
Date:    9/26/96 9:54 PM


Pete Waddell wrote:
>
>      change vendors
>
> Subject: Inner layer PAD Suppression or NOT?
>
> I am currently debating the pro's & con's of suppressing  non-functional
> inner layer pads and have found our PCB fabricators have differing views
> on which is best.

I hope we get more thoughtful responses to the question. I am very
interested in this issue too, and I DON'T want to change vendors.

I have been told two advantages:
  + increasing the life of drill bits,
  + less chance of clearance problems (shorts).

The first advantage helps them, and the second advantage helps us.
When we asked one vendor whether we should do it, they responded that
they have been doing it automatically on our designs for over a year,
without our ever realizing it. (Makes me wonder what OTHER things they
do to help us out, eh?)

Anyway, just recently I have heard that plated holes are stronger with
the extra pads.

OK, what's the scoop, guys?                                  Jack


****************************************************************************
* The mail list is provided as a service by IPC using SmartList v3.05      *
****************************************************************************
* To unsubscribe from this list at any time, send a message to:            *
* [log in to unmask] with <subject: unsubscribe> and no text. *
****************************************************************************

****************************************************************************
* The mail list is provided as a service by IPC using SmartList v3.05      *
**************************************************************************** 
* To unsubscribe from this list at any time, send a message to:            *
* [log in to unmask] with <subject: unsubscribe> and no text. *
****************************************************************************