Electronics Forum | Thu Feb 20 07:48:16 EST 2020 | benreben
Hello, The oven profil is not the solution! The only solution for the solder mount on the side is to put gel flux on the side of qfn and make a second travel in reflow . The flux remove oxyde from the copper that is not tinned and the solder is able
Electronics Forum | Tue Feb 11 13:22:22 EST 2020 | rgduval
Sebas, I suspect that your finding of needing the fillet for the card to work is a false finding. One that I dealt with for many years in assembly. As a bottom terminated device, a fillet to the side terminals of the device is not required. Adequ
Electronics Forum | Wed Sep 24 08:32:46 EDT 2025 | spoiltforchoice
Not really all that true. If someone with the same model of oven wanted to, they could share their default starting point profile. One that in all probability they simply use as is on a huge proportion of their assemblies. Designing bespoke profiles
Electronics Forum | Thu Sep 25 16:43:28 EDT 2025 | rwyman
With respect, the setpoints for a .030" thick board with a few passives on it will bear little-to-no resemblance to those req'd for a .125" thick, densely-populated, double-sided board with BGAs, large inductors, etc. Having the paste or profiler
Electronics Forum | Thu Sep 18 11:07:39 EDT 2003 | donbell
SR. Tech: I have worked with Omniflo 7 and 10 ovens for many years. I purchased several 10 zone ovens in '98 when I worked for Ericsson. Here are some of my experinces with Electrovert Omniflo ovens; Yes, you can expect to run the conveyor speed a
Electronics Forum | Tue Feb 11 09:26:57 EST 2020 | astarotf
Hi everyone I have problems welding QFN components in a 10-zone reflux oven, we cannot make a welding fillet that covers the entire QFN pin. Currently we use paste T4 - 63Sn / 37Pb. I enclose the curve of the oven profile. Any help or support on this
Electronics Forum | Tue Feb 11 15:17:49 EST 2020 | emeto
Your profile should be close to this.
Electronics Forum | Tue Feb 11 13:03:05 EST 2020 | astarotf
Evtimov The areas analyzed are a standard oven curve according to the pasta we are using. The channels used are only for measuring the oven temperature profile, not in detail of the QFN component sector.
Electronics Forum | Tue Feb 18 20:04:38 EST 2020 | SMTA-Alex
Sebas, some things in your profile don't make sense. 3 of your thermocouples, #1 # 4 and #6 are consistent. The others show completely different data. The consistent thermocouples, also, show peak temp at 241 - 243 degrees. That is extermely high for
Electronics Forum | Tue Feb 11 17:05:53 EST 2020 | astarotf
Evtimov thank you very much for sharing this profile, we will perform tests with this curve to see behaviors in the oven and pasta.
