Electronics Forum: led tombstoning (Page 1 of 3)

LED's TOMBSTONING

Electronics Forum | Thu Jul 10 12:52:41 EDT 2003 | Terry Saunders

ALL, WE ARE HAVING TOMBSTONING ISSUES WITH LED'S -ANY HELP OUT THERE. PLEASE ADVISE. TERRY SAUNDERS.

LED's TOMBSTONING

Electronics Forum | Thu Jul 10 15:04:02 EDT 2003 | russ

Search the archives. There is a ton of tombstone discussion in there. Russ

Tombstoneing LEDs

Electronics Forum | Thu Aug 05 09:21:45 EDT 2010 | doug_johnson

I am havein a lot of trouble with KINGBRIGHT LEDs tombstoning in the reflow oven. It is a PLCC2 package. The stencil apatures are home plated. Can anyone help me

LED's TOMBSTONING

Electronics Forum | Fri Jul 11 03:35:44 EDT 2003 | emeto

Hi there is one thing. I had the same problem before and after examine it I found the problem is in the pads. The pads on the board were bigger then usual and the distance between them also was a little bit longer.Theese two are the best precondition

Tombstoneing LEDs

Electronics Forum | Thu Aug 05 09:43:35 EDT 2010 | dldavis

Try antitombstone paste or if you are using nitrogen back off on the amount of nitrogen used.

Tombstoneing LEDs

Electronics Forum | Fri Aug 06 06:38:52 EDT 2010 | mun4o

Turn the panel 90 degrees.

Tombstoneing LEDs

Electronics Forum | Mon Aug 09 12:44:01 EDT 2010 | cobar

Pad & Stencil Design http://www.shanelo.co.za/technical_paper_about_stencil.htm

Solder Open/Mild Tombstone on 1206 LED

Electronics Forum | Thu Aug 21 11:26:45 EDT 2008 | dlabelle

Mild tombstoning on 1206 Kingbright LED. Has anyone seen this problem and have any suggestions in root cause? Please see attachment for more detail

Tombstone defect

Electronics Forum | Mon May 05 11:35:00 EDT 2003 | Grant

Hi, This is an interesting point. I use Koki paste from Japan, and it's wonderful, however what properties of solder paste would make it "anti tombstone" paste? How does led free effect tomb-stoning? That would be interesting to know. We might go

LED UP

Electronics Forum | Tue Sep 11 09:41:25 EDT 2018 | charliedci

Leo, Your pic is not clear. It appears the LED is either tombstoned or billboarding. A larger pic would help, also component info, how many pads, etc.

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