Electronics Forum | Tue Jul 20 15:02:49 EDT 2010 | vetteboy86
I've seen this warp issue across several different PCB's we assemble. One of the biggest head ache's is getting the boards to transfer between machines, converyors, and inside our pick and place. Due to the warpage, transport between conveyors is dif
Electronics Forum | Tue Aug 08 18:25:13 EDT 2000 | Tom Gaffney
Does anyone know a consultant or a good source of information for addressing board warp and twist problems? I am looking for a list of proven remedies that I can try. Thanks!
Electronics Forum | Mon Apr 30 09:20:50 EDT 2001 | Steve Zanola
We have seen the same thing. Our vendor recently change the way the BGA is fabricated and the new package warps. We are currently trying to adjust our process paramentes to fix this problem. I will try the "bake out" suggestion and see if it cor
Electronics Forum | Thu May 17 07:58:25 EDT 2001 | Bob Willis
I think the answers to the problem have been given but if anyone wants to see this happening and solder shorts forming during corner warp there is a video clips on BGA shorts to download. Its available free on http://www.bobwillis.co.uk It should am
Electronics Forum | Wed Sep 29 02:40:45 EDT 1999 | Robert
Hi All, Any one experince BGA-chipset warp about 10-15mil after removing from PCB? FYI, the rework temperature for preheat was 170C from room temperature about 30 seconds, & BGA was removed at temperature between 190-200C. Thankyou. BRs, Robert
Electronics Forum | Sun Feb 15 21:28:44 EST 2004 | Annoymous
Gridlok is good but it will also depends on your board. Board that is warpped and thick will not be flatten by gridlok as the concept for this support system is to conform to the shape of the underside of the board with very minimum upward force from
Electronics Forum | Wed Nov 30 05:12:53 EST 2005 | imachin
We have recently experienced problems with quite severe warping on a PCB after reflow by our PCB subcontractor. Any advice would be much appreciated!
Electronics Forum | Wed Jul 21 11:12:05 EDT 2010 | remullis
I have some 13" long boards that warp considerably during first pass through reflow (no center support), what I've done to improve this type of warpage is stiffeners along the front and back edge. This may help with twisted boards as well.
Electronics Forum | Thu Dec 23 11:04:19 EST 2010 | davef
To get started, here's a recent thread about board warp: http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=15249&mc=7
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