[adel2014]

Hello , every one , could i make a wave soldering method at my home ? or is any further way to soldering a led matrix that contain about 1000 holes rather than the regular method ? thanks

 

[KJ6EAD]

Someone else recenty did some research on this:

http://dangerousprototypes.com/forum/viewtopic.php?f=68&t=5248

At the least you'll be able to glean a few new search terms to try.

I would like a tiny fountain pump that I could drop in a small solder pot.

 

[OLIVE2222]

Well even if possible not sure this is profitable. If you only have one time 1000 pins to solder it's a 30 minutes jobs. The problem with solder waves is the solder contamination, you need to send a sample of the solder to a lab on regular basis to check it. When contaminated you must discard all the solder and this is a lot of money even for small machines.

A new method based on SMD technology is the paste in hole method. Your screen the solder with a mask (= a stencil) like in SMD. The mask must be however carefully designed.
Here under an article about this method. It's relatively easy to handle at home, and you just lost a bit of solder paste time to time. The result don't look as "clean" as wave or hand soldering but the job is done!

http://www.samtec.com/documents/web...cessing_Information/Through-Hole-Printing.pdf

Olivier

 

[jpanhalt]

Recently (2012), a reactive silver ink was developed that has quite good conductivity and sinters at mild temperatures. It is basically a variation of the very old Tollens method for silvering that gives thicker deposits. It would not provide the physical strength of solder, but it might facilitate making 1000+ connections.

Here is a link to the news release: http://news.illinois.edu/news/12/0112ink_JenniferLewis.html

The abstract originally posted on the ACS site was quite informative and had all the experimental details needed. Unfortunately, that abstract has been taken down. As I recall, the method uses a silver/ammonium/acetate mixture, which upon gentle heating releases ammonia to deposit nano-particles of silver.

I do have the article (at another location) and could abstract the method here, if there is sufficient interest. It will take me a day to retrieve it.

John

 

[adel2014]

thanks for every one who replayed , i found a easy method from a video on youtube here ;

please if you know , is that method will be useful ?


thanks

 

[OLIVE2222]

Well, looks to works but you still have the solder contamination problem and the solder cost.

Olivier

 

[KJ6EAD]

I guess the spray bottle in the video contained flux. It would also be helpful to rig some kind of preheater and don't neglect fume extraction.

The dip method is only going to work for small boards and even then it's tricky to get full coverage and avoid a top side flood.