[PCB_FORUM] Re: BBVs

  • From: "Gary MacIndoe" <gary.macindoe@xxxxxxx>
  • To: icu-pcb-forum@xxxxxxxxxxxxx
  • Date: Fri, 8 Apr 2005 11:12:01 -0600

MessageHey Gene,

What exactly are you saying?  If you mean separate drill charts for each
drill (i.e. 1-2, 7-8, thru), Allegro already creates separate one.  I can't
believe you mean a separate Fab drawing sheet for each layer, do you!?!

Thanks for you response!

Gary E. MacIndoe
PCB Design Engineer
Advanced Micro Devices, Inc.
Longmont, Colorado


  -----Original Message-----
  From: Gene Carman [mailto:gcarman@xxxxxxxxxxxxxxx]
  Sent: Friday, April 08, 2005 11:05 AM
  To: icu-pcb-forum@xxxxxxxxxxxxx
  Subject: [PCB_FORUM] Re: BBVs


  set up fab drawings for each layer.
    -----Original Message-----
    From: Gary MacIndoe [mailto:gary.macindoe@xxxxxxx]
    Sent: Friday, April 08, 2005 10:02 AM
    To: icu-pcb-forum@xxxxxxxxxxxxx
    Subject: [PCB_FORUM] Re: BBVs


    Hey George,

    Thanks for your response.  That's the way I created them, inside of the
design.

    The Fab drawing thing seems funny though: I know they are the same size
drill, but with the same drill symbol, looking at the figures inside of the
board outline, how can you tell the 1-2s from the 7-8s?

    Thanks again!
    Gary E. MacIndoe
    PCB Design Engineer
    Advanced Micro Devices, Inc.
    Longmont, Colorado


      -----Original Message-----
      From: george.h.patrick@xxxxxxxxxxxxxx
[mailto:george.h.patrick@xxxxxxxxxxxxxx]
      Sent: Friday, April 08, 2005 9:59 AM
      To: icu-pcb-forum@xxxxxxxxxxxxx
      Subject: [PCB_FORUM] Re: BBVs


      Gary:

      We create them "on-the-fly" inside the database.

      The drill symbols are the same, but the charts are created on separate
layers so it doesn't really matter (at least in 15.2).
      --
      George Patrick
      Tektronix, Inc.
      Central Engineering, PCB Design Group
      P.O. Box 500, M/S 39-512
      Beaverton, OR 97077-0001
      Phone: 503-627-5272         Fax: 503-627-5587
      http://www.tektronix.com    http://www.pcb-designer.com

      It's my opinion, not Tektronix'

        -----Original Message-----
        From: Gary MacIndoe [mailto:gary.macindoe@xxxxxxx]
        Sent: Friday, April 08, 2005 08:47
        To: Allegro Forum
        Subject: [PCB_FORUM] BBVs


        All,

        When you use blind and buried vias, do use set them up in the board
database from an existing regular top to bottom via?  Do you create BBV
padstacks for your pad library?

        I see in the padstack editor, Parameters tab, you can set the Type
to "Blind/Buried".  I've tried to create a BBV padstack in the editor
without luck.

        What do you guys using BBVs do?  Create them in the design or in
your library?

        Also, when creating the drill legend for the Fab drawing, if a 1-2
blind via and a 8-7 blind via were created in the database from the same top
to bottom via (the same laser drill size in this case), the "figure" in the
drill legend is the same.  Is this correct, or do you have different
"figures" for the 1-2 and 8-7 same size drills?

        Thanks for any responses!
        Gary E. MacIndoe
        PCB Design Engineer
        Advanced Micro Devices, Inc.
        Longmont, Colorado

Other related posts:

  1. Home
  2. icu-pcb-forum
  3. Archive
  4. 04-2005