Hi Peter - I am looking to measure the alpha emission of the solder paste
as delivered by the supplier. With the industry change over to Pbfree
soldering processes, there has been a renewed interest in alpha emission
phenomena - everything from the die fabrication using Boron 10 to solder
paste to the use of Xray inspection. My focus is finding anyone who has a
test protocol for measuring the alpha emission of the solder paste as I had
a customer ask the question and am now looking to see if I can provide a
valid response. The answer may be that no one is testing solder paste for
alpha emissions.

Dave

On Mon, Feb 17, 2020 at 9:01 AM Peter Bell <[log in to unmask]> wrote:

> Hi Dave,
>
> I'm very curious, I suppose you can't shed any light on the context? We
> deal with a lot of electronics that will be or have been irradiated during
> use, but not with any concern to radioactivity of components/material
> *before* assembly.
>
> I guess you mean testing alpha emission of the paste as delivered by the
> supplier? Not after irradiation by a later source?
>
> Kind regards,
> Peter Bell
> E-mail: [log in to unmask]
>
> CERN - European Organization for Nuclear Research
> 1211 Geneva 23, Switzerland
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of David Hillman
> Sent: Wednesday, 12 February 2020 14:38
> To: [log in to unmask]
> Subject: [TN] Solder Paste Test Question
>
> Hi folks - hey, does anyone know of a lab(s) that have the capability to
> test solder paste for their low alpha emitting characteristics/properties?
>
> Dave Hillman
> Collins Aerospace
> [log in to unmask]
>