Peter;

Any thoughts on using a Haako hot air tool? I'm sure with a little operator
technique you could solder the parts without damaging the part or causing
spatter from solder paste.

Bill Kasprzak
Moog Inc, Electronics Process Engineering


-----Original Message-----
From: Peter Swanson [mailto:[log in to unmask]]
Sent: Friday, September 12, 2003 4:57 AM
To: [log in to unmask]
Subject: [TN] LED Soldering Query


We have a customer who is looking at assembling some surface mount LEDs to a
FR-4 board. We are told that the parts will not stand conventional reflow
temperatures (they themselves are made with a LMP solder, and the lens is
temperature sensitive). At this stage, I don't know much more detail.

The query is whether he could print conventional paste, place the devices
and then reflow each joint individually, by using a robot. But a soldering
iron applied the paste will cause spitting, solder balls, etc.

Perhaps a thermode could be applied to the joint and a temperature ramp up
applied, which will safely reflow the paste, if such a thing exists and can
be mounted to a robot.

I would be interested in general thoughts on how to process these parts.
Maybe not even solder...

TIA,
Peter
--
--------------------------------------------------------
Peter Swanson           [log in to unmask]
INTERTRONICS               http://www.intertronics.co.uk
Tel: +44 1865 842842                Oxfordshire, England

INTERTRONICS is dedicated to providing quality material, consumable and
equipment solutions to high technology assembly industries, with the highest
levels of technical support and customer service.

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