Electronics > Projects, Designs, and Technical Stuff
Vapour phase Soldering
mrpackethead:
--- Quote from: george graves on January 20, 2015, 10:35:42 am ---Call me a noob....but how does this work? Then I hear vapor, I assume a phase change - like liquid to gas.
If this is just re-flowing a board in deep-fryer, that's not that interesting.
--- End quote ---
It is reflowing, but its as you worked out the heat is transferred to the solder when the board is submerged into a hot vapour. the vapour consdenses on the board ( changes from gas --> liquid ) and at the phase change transfers its heat.
The professional systems start at about $15,000, but the results are really good.
mrpackethead:
--- Quote from: mikeselectricstuff on January 20, 2015, 10:57:07 am ---For double-sided, most parts will stay on due to surface tension of the solder. Larger parts may need glue dots
--- End quote ---
Thats what i'd assumed, much like what happens with more traditional reflow. Probably just need to arrange to ensure that the previously soldered side is sitting on a stand off etc.
mrpackethead:
--- Quote from: mikeselectricstuff on January 20, 2015, 11:05:24 am ---
The other problem is there is only one manufacturer - Galden
AU$1850 for 5kg :
http://www.oritech.com.au/productDetail.aspx?productID=40254
Here's someone that sells small quantities :
http://www.electronic-thingks.de/en/electronic-products/soldering-accessory/galden-ls-230.html
--- End quote ---
Can source it for USD$850 for 7kg ( ~3.8l / 1 gallon ),
If you are careful you should not be loosing it out the top so, its good for many cycles.
mrpackethead:
The concept of using a a deep fryer was really quite clever, almost every thing you need is there. Just need to add a cooling frame work to it. I'd probably use some alluminum heat sink profile and maybe stick some pelters on it to keep it nice and cold.
Its looks and feels like a nice tinker project!
jeremy:
--- Quote from: mrpackethead on January 20, 2015, 06:19:32 pm ---
--- Quote from: mikeselectricstuff on January 20, 2015, 11:05:24 am ---
The other problem is there is only one manufacturer - Galden
AU$1850 for 5kg :
http://www.oritech.com.au/productDetail.aspx?productID=40254
Here's someone that sells small quantities :
http://www.electronic-thingks.de/en/electronic-products/soldering-accessory/galden-ls-230.html
--- End quote ---
Can source it for USD$850 for 7kg ( ~3.8l / 1 gallon ),
If you are careful you should not be loosing it out the top so, its good for many cycles.
--- End quote ---
Care to share your source? I'm interested.
I've been digging through patents and stuff this afternoon. It goes by the name Galden (as Mike mentioned), fluorinert by 3M or Kytox by DuPont. It seems you can get it from some Chinese suppliers, but I don't really trust those links. You can get different versions with different boiling points, but they all have the same CAS number. So I guess its just a more refined form for the higher temps? I can't find fluorinert or Kytox that goes over 215C though, Galden goes up to 260C if you buy the right kind.
Usage in a commercial but benchtop batch oven made by IBL is rated 1g/cycle. Full reflow cycle is 6 minutes. I asked for a quote from their Australian distributor, but given the patents I found by IBL I'm sure it's not going to be cheap ;)
I'm no chemist, but the family of chemicals it belongs to is known as perfluorinated polyethers (PFPE). If you search google for perfluorinated polyether oils you will get lots of hits. It's used as a high/low temperature lubricant by the looks of it.
An interesting patent: http://www.google.com/patents/US4871109
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version