+ Post New Thread
Results 1 to 3 of 3
  1. #1
    Junior Member level 2
    Points: 771, Level: 6

    Join Date
    Jan 2014
    Posts
    21
    Helped
    0 / 0
    Points
    771
    Level
    6

    Footprint for WLCSP package

    Hi all,
    I want to know the size of micro via for .265mm pad and .4mm pitch WLCSP package.
    For the same i want to know whether via on SMD pad is possible if so what will be the dia of that micro via.

    Regards,
    Arunmaran

    •   Alt29th September 2014, 04:55

      advertising

        
       

  2. #2
    Super Moderator
    Points: 55,114, Level: 57
    Achievements:
    7 years registered
    Awards:
    Most Frequent Poster 3rd Helpful Member

    Join Date
    Apr 2014
    Posts
    11,148
    Helped
    2617 / 2617
    Points
    55,114
    Level
    57

    Re: Footprint for WLCSP package

    Hi,

    Best is to go to the chip manufacturer's homepage ( if not in the datasheet) and find it's pcb layout recommendations.
    Or go for IEC standards.

    Klaus



    •   Alt29th September 2014, 06:33

      advertising

        
       

  3. #3
    Advanced Member level 5
    Points: 12,048, Level: 26
    Achievements:
    7 years registered

    Join Date
    Feb 2010
    Location
    UNITED KINGDOM
    Posts
    1,914
    Helped
    600 / 600
    Points
    12,048
    Level
    26

    Re: Footprint for WLCSP package

    IEC standards!!!!
    The footprint standard for surface mount devices is IPC-7351 if you are serious about PCB design I would recommend getting to know this standard.

    As to microvias, generally based on a 0.1mm pad with a 0.3mm target area...in your case and mine in the past I have done a micro via with a land the same size as the width of the pad for the device and talked very nicely to my PCB manufacturer, it is doable.



--[[ ]]--