Dear, Everyone,

I imagine quite a few here deal with measurements at cryogenic
temperatures, so I hope that you might have some experience to share.

I am looking for a mounting socket similar to a DIP carrier but where
the sample would sit on a thick metal heatsink.  What we need to do is
mount a 5x7mm chip into an optical dilution refrigerator and also have
some electrical contact to the sample.  Currently we do this by gluing
the chip (with indium) into a DIP carrier (like these -
http://semipackages.com/images/thumb/c/c3/Lcc-from-corwil.jpg/200px-Lcc-from-
corwil.jpg)
and then wire-bonding the contacts from the chip to the DIP carrier.

The problem is that the DIP carrier is made mostly of plastic with
only a thin layer of gold under the sample. The sample in this case
generates enough heat that the plastic cannot efficiently conduct it
away.

So the question is, is it possible to obtain a similar chip holder,
but where the chip would sit on a solid metal plate. The experiment is
electro-optical so the top part of the chip must remain exposed.

thank you in advance,
-mikas