Sure, Graham,
maybe some misunderstanding (joking must be correctly formulated), I
don't mean to use french language, just tried to make a baite so someone
from a french company came in. I'm still wondering why the french
companies are so reserved in this forum.
Now, Graham, forget my question, I leave the issue completely, instead I
have something for you and possibly someone else: how do you 1)verify
2)get rid of built-in gas or gas-creating micromaterial in a metal plate
or a Au/Ni/Cu-Mo plate? We mount large semiconductor chips on
heat-spreader by means of a thermoplastic film. The supplier of this
film is one of the most familiar, they have specified Tg, outgassing,
and all other chemical factors, and it seems as this film transer will
not cause gas to grow under the chip during curing. But we get bubbles
between the film and the heat spreader. The american thermoplastic film
supplier has inspected our line and concept and he can't understand the
bubble's origin. Can't be the transfer, he said.
If extremly advanced or unusual equipments are needed for such
evaluation, can you help us Graham? I can send a photo to you so you get
more than words. Maybe IMAPS is a more correct adress for such
questions, but I suspect many of you are in there too.

Best wishes

/Ingemar Hernefjord
Ericsson Microwave Systems



---------------------------separator---------------------------------
> Ingemar,
>
> You know one of the major drawbacks of the whole "Internet" thing, is
that
> you MUST speak / read / write English.
>
> Curious thing is, most of the planet don't!
>
> In my experience, France, Italy, Spain are hors de combat! (Good old
English
> expression!)
>
> Of course there are those cynics who would point out that the UK and
the USA
> are 2 nations divided by a common language.
>
> And if you think this is bad, take a look at my reply to Vincent
BADA....
>
> Regards,
> Graham Naisbitt
>
> [log in to unmask]
>
> WEB: http://www.concoat.co.uk
>
> CONCOAT Ltd
> Alasan House, Albany Park
> CAMBERLEY GU15 2PL UK
>
> Tel: +44 (0) 1276 691100  Fax: +44 (0) 1276 691227

>

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