Hi Bob,

Well, the next step down with Galden heat transfer fluids is the HT200
which has a boiling point of 200 C. 3M makes some 215 C. fluorinert, called
their FC70 if you can find it. Last time I looked was up close to $1,000 a
gallon...

Steve

On Sat, Apr 15, 2017 at 1:12 PM, Bob Wettermann <[log in to unmask]> wrote:

> All:
>
> We are running an experiment on the use of vapor phase reflow for a rework
> process due to the excessive warpage (confirmed by and quantified by Shadow
> Moire' measurements) of a specific component.We want to keep the
> temperature  of the component, which is an Sn63 soldered component, as low
> as possible. The balance of the board is all soldered using a SAC305 alloy.
>
> We are "renting time" on a  local company's VP reflow oven to run the
> experiments.
>
> Last week went over the DOE and the engineer who is responsible at the
> company that owns the vapor phase claims that they profile tin lead and
> lead-free boards using the same fluid in the bed and just adjust the time
> and heater conditions to get the right profile.
>
> I understood that you were to match the fluid to the solder alloy/liquidus
> temperature-right?
>
> Being used in the machine is the Solvay S 230  230°C  for unleaded solder
> (e.g.. SnCuAg)
>
> Comments would be appreciated.
> --
> Bob Wettermann
> BEST Inc
> [log in to unmask]
> Cell: 847-767-5745
>

-- 


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