SMD adhesive

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Good day, We use Loctite 3616 for securing SMD's to the P... - Aug 29, 2005 by

I haven't used that Loctite before as I've never printed adh... - Aug 30, 2005 by Steve Thomas

This is a bad situation and if you use (better to rework) ad... - Sep 01, 2005 by adlsmt

OverTheHill

#36384

SMD adhesive | 29 August, 2005

Good day,

We use Loctite 3616 for securing SMD's to the PCB before wave. On rare occasions, we have to remove and replace the secured part. Our operators are having a diffucult time removing parts (large QFP's, etc). My questions to this forum:

1) What's your procedure for removing SMD parts from PCB's that are secured with fully cured adhesives?

2) Are some SMD adhesives easier to work with then others after they have fully cured?

Thanks

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Steve Thomas

#36399

SMD adhesive | 30 August, 2005

I haven't used that Loctite before as I've never printed adhesive, but you might try reheating the part with a hot air tool...it works pretty well with 3609.

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adlsmt

#36448

SMD adhesive | 1 September, 2005

This is a bad situation and if you use (better to rework) adhesive that means it will work worse in your normal process(wont hold). Heat all the leads to reflow temp, twist (rotate)the part untill it breaks free. Most adhesives are not designed for this and will break free fairly easily. Make sure its at reflow temp or you will pull up leads.

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