Electronics Forum | Wed Apr 09 17:39:30 EDT 2008 | diesel_1t
Hi. I know that this is one of the mos common threads here, I have been doing some research, but i didn't find any similar. The main issue is that I have seen tombstoning since two weeks ago, it is more characteristic on 0603 resistors (Stackpole e
Electronics Forum | Tue Sep 14 05:59:16 EDT 1999 | Edmund Loh
Can anyone out there pls enlighten me on how to solve chip tombstone defects. I am running a board with a lot of 0603 chip. i had fine the profile and the alignment, but it still happen randomly on the board itself. Is there any other way to solve t
Electronics Forum | Fri Sep 09 09:58:54 EDT 2005 | gregcr
Hi all, we are placing some of the 0306's (0603 size parts with the contacts down the long side of the part rather than on the ends). We are having quite a lot of tombstoning. The placement is dead on and the pad layout is per the mfg specs'. Any
Electronics Forum | Tue Oct 12 16:08:44 EDT 1999 | Brian
| I need your help! We have been doing double sided surface mount for 4 years now. Up until 6 months ago I have not had a tombstoning problem. Since then I have a fairly high incidence rate of tombstones on the 0603 size resistors (no other parts).
Electronics Forum | Sat Jul 16 08:12:44 EDT 2005 | davef
skandaae: By "tilt" do you mean that one end of the 0603 has lifted from the board surface? If so, we call this "tombstone". In general, tombstoning is caused by an imbalance in temperature or forces on the component. * Convince yourself about the
Electronics Forum | Sun Sep 11 05:48:32 EDT 2005 | Mika
If 0 or 180 degr. make v-shape openings to each other left & riht, if 90 or 270 degr. top/ bottom, on the stencil apertures; well, you understand... We use this and 87 % reduction of stencil apertures for 0603:s and 0402:s. 0.127 mm stencil thicknes
Electronics Forum | Mon Apr 14 19:26:35 EDT 2008 | diesel_1t
Update: Recently, we ran a (old) product on which they made a new stencil, appertures 1-1 on 0603. As soon as they began to run, tombstones appear. I went to trashcan to rescue old stencil, and noticed that pads came with a "c" shape reduction, I as
Electronics Forum | Wed Apr 12 21:33:27 EDT 2000 | Micah Newcomb
Billy and Chris have a good point, pad size and geometry will affect proper aperture size and geometry and could result in tombstoning. Also I have seen chips which require special pastes but I have never found this to be the cause of tombstoning, in
Electronics Forum | Wed Feb 26 15:27:21 EST 2003 | robert valles
Sounds like someone before you was dealing with tombstoning components. We have had greater success with triangular paeratures for 0603 and 0402 footprints. Granted the pad will not be wetted completly but IPC requirements are maintained.
Electronics Forum | Tue Apr 01 09:36:52 EDT 2008 | lloyd
Hi folks, I'm looking your opinion on the quality of this component. It is an 0603 inductor made by EPCOS, B824496C. We are finding that it has a tendency to partially tombstone. I was thinking that the coating extending out on to the terminations c
