What is Billboarding?

Discussion in 'General Electronics Chat' started by Amenably_Amendable, Mar 21, 2008.

  1. Amenably_Amendable

    Thread Starter Member

    Jan 21, 2008
    13
    0
    It seems to be some sort of PCBA Defect. Thanks.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You might want to be more clear. These are the definitions I found for PCBA - AcronymDefinitionPCBAPacific Coast Baptist AssociationPCBAPeoria County Bar Association (Peoria, IL)PCBAPhysically Challenged Bowhunters of AmericaPCBAPolk County Builders Association (Florida)PCBAPortable Clinical Blood AnalyzerPCBAPorter County Builders Association (Indiana)PCBAPrinted Circuit Board AssemblyPCBAPrivacy Certification for Business AssociatesPCBAProsen Center for Business Advancement (University of Dallas, Texas)PCBA


    Punjab College of Business Administration (Pakistan)




    Is billboarding similar to this link? - http://www.flipcode.com/archives/Billboarding-Excerpt_From_iReal-Time_Renderingi_2E.shtml
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    I'm guessing that PCBA means Printed Circuit Board Assembly. The term "billboarding" is used to describe the condition of a passive surface mount component that has reoriented itself during the re-flow soldering process such that it is connected on both ends electrically but standing up on its narrow edge. It is so called because it looks like a tiny billboard. This term is similar to the term "tombstoning". With tombsonting, the passive component is lifted up on one end and appears like a tiny tombstone.

    hgmjr
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Billboarding: A discrete component with both terminations soldered, but laying on its edge.

    Billboarding is caused by having pad size "side" dimension that is too robust.

    It is normally caused by wave solder hitting both ends of the pad and dumping a large volume of solder on both pads causing the chip to flip up.

    It can also happen on oven-soldered boards if the pick & place machine has dirty pickups.
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Thanks, I learned something. Google has its limits.
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Here's a good write-up of a goodly number of PCB "sins" that techs/QC has to look out for:
    http://www.asset-intertech.com/connect/2006Q4/where_bs_fits.htm

    Note that "billboarding" is similar to "tombstoning", except that the circuit can still function if the component is "billboarded". It still isn't right, though. The component will be physically weaker in it's attachment.
     
  7. Amenably_Amendable

    Thread Starter Member

    Jan 21, 2008
    13
    0
    Thanks, there wasn't much info out there on this. And, beenthere.. why were u making a joke out of my question? Well, good one? Although... it was kinda obvious what I meant.. especially for someone who has posted almost 4,000 times on this site.

    :cool:
     
  8. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Not at all - I didn't catch the acronym, and those were the things Google returned when I searched. I got out of industry back when all components were through hole. I learned as much or more than you did.
     
  9. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    Leave him alone, it wasn't exactly an obvious question. If anyone is at fault, it is you for not posting a clear question.

    Steve
     
  10. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    That's ok, scubasteve, nobody has hurt feelings.
     
  11. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    im hurt, you've seen the board :(
     
  12. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Whining becomes no one. :rolleyes:

    ;)
     
  13. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    Meh, I was merely excusing my behaviour.. I hate when people get offended that someone misinterprets their ambiguous question and makes it a point. ~4000 posts means that he has helped/made fun of a lot of people :p

    Steve
     
Loading...