Carrie
We made wave soldering trials in LEADFREE with SnAgCu and played with the temperatures between 240°C and 280°C. What we saw was:
- 250°C- 260°C in the wave gave the best results in soldering. Higher solder temperatures caused icicles and increased bridges. The reason, in our opinion, is that higher temperature destroys the flux so that the PCB enters the second wave without flux.
- In one solder machine we found a temperature difference of 20°C between the solder pot setting and the wave temperature.
Best regards
Guenter
EMPA
Swiss Federal Institute for Materials Testing and Research
Centre for Reliability
Guenter Grossmann, Senior Engineer
8600 Duebendorf
Switzerland
Phone: xx41 1 823 4279
Fax : xx41 1823 4054
mail: [log in to unmask]
---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
