Full Site - : bga collapse (Page 2 of 13)

Collapsing of micro bga ball due to improper land pad design ?

Electronics Forum | Mon Aug 25 08:44:10 EDT 2008 | rameshr

Dear Andrezj, i had attached the photos for ur reference Kindly advice.

Collapsing of micro bga ball due to improper land pad design ?

Electronics Forum | Mon Aug 25 10:36:05 EDT 2008 | davef

Yes, it's peculiar that the layout of this board is so disorganized * Pads are not round, uniform, or the same size * Exposed traces have different thickness

Collapsing of micro bga ball due to improper land pad design ?

Electronics Forum | Wed Aug 27 00:20:38 EDT 2008 | rameshr

Dear davef, Will u pls advice what are all the possible defects caused while soldering ( assembling ) this type of boards.

Collapsing of micro bga ball due to improper land pad design ?

Electronics Forum | Wed Aug 27 08:25:24 EDT 2008 | davef

We'd expect to see: * Solder starved connections at pads with large trace/pad areas. * Less reliable solder connections at pads that do not match the shape and size of the corresponding pads on the component.

BGA Tilt

Electronics Forum | Fri Feb 09 08:07:41 EST 2007 | jax

Has the board been looked at under X-Ray? Have you built more than 1 of the boards in question? Do any of the other boards have the same problem? Have you made any changes to the profile between boards? One side of the BGA collapsing during reflow w

Ceramic BGA Balls Move Post Assy

Electronics Forum | Sat Aug 25 23:01:45 EDT 2012 | ssridhar

Hello jdumont, I think the spheres are leaning as there is not enough meat under the spheres. In ceramic BGA devices there is a solder fillet which is generally a solder paste which is used to give the device some height before balling it. This heig

SRT -1000 BGA rework system

Electronics Forum | Thu Jul 31 15:29:25 EDT 2003 | bcceng

A couple of things you can look into 1. The proper bottom pre-heat of board. If you are applying only direct hot air to BGA without preheating can cause BGA's to warp and collapse un-even. 2. Moisture on you BGA's. If BGA's were not properly packa

DDR3 - BGA VDD and VDDQ Pins - Design Guidelines

Electronics Forum | Thu Apr 05 05:37:43 EDT 2018 | balachandran

Recently we have seen the BGA Ball collapsing issue in the field. The unit has the clean manufacturing records at factory, But in the same unit we did the cross section and found Ball explosion only in VDD and VDDQ pins. Can anyone help me to underst

Low Silver Solder Problems

Electronics Forum | Tue Aug 25 07:13:20 EDT 2009 | davef

It sounds like the BGA balls are not melting. You're probably getting no collapse. Put a bare BGA on a hot plate. Heat it up until you get collapse. Adjust your reflow profile until you have that temperature on the BGA pads on the board. What is the

BGA testing on the Agilent HP5DX x-ray System

Electronics Forum | Wed Oct 11 09:23:06 EDT 2000 | Roger Squires

Has anyone had any success in finding open circuits (i.e. ball present but not soldered to PCB) under collapsible BGA's using an Agilent HP5DX x-ray tester and the BGA2 algorithm? Can anyone recommend an elongated pad design which produces the neces


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