Tombstoneing LEDs

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I am havein a lot of trouble with KINGBRIGHT LEDs tombstonin... - Aug 05, 2010 by Doug Johnson

Try antitombstone paste or if you are using nitrogen back of... - Aug 05, 2010 by DL

Turn the panel 90 degrees. ... - Aug 06, 2010 by iv40

Pad & Stencil Design ... - Aug 09, 2010 by Mark

Tombstoning is a result of imbalanced force experiences by t... - Sep 01, 2010 by sachu_70

Doug Johnson

#62385

Tombstoneing LEDs | 5 August, 2010

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

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#62386

Tombstoneing LEDs | 5 August, 2010

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

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iv40

#62393

Tombstoneing LEDs | 6 August, 2010

Turn the panel 90 degrees.

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Mark

#62404

Tombstoneing LEDs | 9 August, 2010

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

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sachu_70

#62592

Tombstoneing LEDs | 1 September, 2010

Tombstoning is a result of imbalanced force experiences by the device during reflow due to unequal behavious of the solder paste across all sides of the device. Could be due to many factors a few of this are: (1) Unequal solder mass distribution, (2)Misalignment during device placement, (3) Poor Reflow Profile. Trust me, such problem can surely be resolved.

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