Electronics Forum | Mon Feb 20 20:57:35 EST 2006 | Cal Kolokoy
The ramp sets the stage for flux activation, and if ramping in a linear fashion, burning off some of the volatiles, but yet preserving the activators. The ramp is also intended to preheat the SMDs to prevent thermal shock. Most solder paste data sh
Electronics Forum | Wed Feb 14 04:48:58 EST 2018 | ameenullakhan
The profile I have shared is for SMQ92J leaded solder paste
Electronics Forum | Fri Jun 23 10:10:15 EDT 2006 | Gman
Some amount of voiding was always seen on sites where solder paste is printed. These voids are much smaller. However the site where a flip chip is flux dipped has never had problems with voiding. Macro voids (and huge ones at that)across the board s
Electronics Forum | Mon May 10 11:33:29 EDT 2004 | adm
Hi Can anyone tell what is a Ramp to Spike Profile? Rgds
Electronics Forum | Wed Feb 17 12:16:17 EST 2010 | dcell_1t
Hi there: During the past weeks (let's say since beginning of the year) we've been experiencing some issues with shifted components. We verify for position before Reflow oven and the components are Ok, but they observe shifted after reflow. it occurs
Electronics Forum | Tue Oct 14 11:34:04 EDT 2003 | Axl
As far as solder paste goes search no further! I have worked for some huge CM's as a Process Engineer and a lot of them have put thousands of hours of Engineering time and evaluation just to come up with the same answer every time. For no-clean it is
Electronics Forum | Tue Apr 27 17:37:30 EDT 2004 | Ren�
We have switched over form Indium's nc-smq92 to > nc-smq92j and are experiencing a ton of solder > balls. Even if the print is dead on we still seem > to be getting them. We never seemed to have this > problem with old paste unless the print was
Electronics Forum | Sat Aug 21 12:38:09 EDT 1999 | Earl Moon
| Want to know the Tools/ Process required to get started with CSP prototyping and R & D. | Anyone working on this , please help out. | Depending on the type, size, and pitch - just like BGA's, they aren't tough. Our 1mm types went through prototypi
Electronics Forum | Wed Apr 09 17:39:30 EDT 2008 | diesel_1t
Hi. I know that this is one of the mos common threads here, I have been doing some research, but i didn't find any similar. The main issue is that I have seen tombstoning since two weeks ago, it is more characteristic on 0603 resistors (Stackpole e
Electronics Forum | Mon May 09 16:44:33 EDT 2011 | dcell_1t
Hi, We have been struggling with an issue of non wetting on a QFP (Renesas - 256, Sn90Pb10) but the issue "desapears" sometimes for a while and then back again suddenly. This is the scenario: Component: QFP 256 / Renesas / Sn90Pb10 / 0.5 mm pitch S
