Electronics Forum | Wed Sep 11 16:57:04 EDT 2002 | bigwop
I've seen this problem caused by the cool down. > On a 7 zone oven I made a profile to peak at zone > 5 to give some semblance of control to the cool > down. The component can develope a big delta T, > because of the difference of materials Che
Electronics Forum | Wed Sep 11 13:20:37 EDT 2002 | stepheno
I've seen this problem caused by the cool down. On a 7 zone oven I made a profile to peak at zone 5 to give some semblance of control to the cool down. The component can develope a big delta T, because of the difference of materials
Electronics Forum | Wed Sep 11 23:20:44 EDT 2002 | scottefiske
Profiles are absolutely the first course of action to validate. A few additional questions would be: * Moisture can cause warping as well, verify the manufacturers recommended handling procedures were followed. * Where is the suspect BGA located
Electronics Forum | Thu Sep 12 09:15:29 EDT 2002 | mhoughton
I have printed and placed similar devices in high volume with exactly this spec for a couple of years with no problems, are you using laser cut stencils and what type of solder paste are you using? and what is the end use of the product as it may nee
Electronics Forum | Thu Sep 12 10:45:29 EDT 2002 | pbarton
We have used a laser cut stencil 0.15mm (0.006") thick with 0.3mm (0.012") square apertures radiused in the corners 0.06mm (0.0025") to aid paste release. This approach with the (type 3) paste we use has proven successful on thousands of devices plac
Electronics Forum | Fri Mar 28 22:01:00 EST 2003 | MA/NY DDave
Hi Yes I agree, yet this subject is about Tombstoning and oven profile or even oven working correctly across the entire product is a sub-set of how one gets those little chip babies to sit and stay where they belong. Flat and Heeling like their mast
Electronics Forum | Mon Dec 27 11:15:17 EST 1999 | g cronin
please send me a copy of sample reflow profiles for BGA packages. Please indicate the type of BGA and the Oven used. As well as any special characteristics of the assembly that have effected the profile. I a trying to learn more about the common "t
Electronics Forum | Fri Apr 09 12:46:10 EDT 1999 | Bob Barr
I have been using an Air-Vac DRS-22 for almost two years with very good results. Once a profile is developed it is very repeatable. The DRS-22 is no longer available, however. It has been replaced by the DRS-24. Unfortunately, the DRS-24 has a lo
Electronics Forum | Tue Dec 28 12:55:16 EST 1999 | Justin Medernach
Greg, The best advice that I can give you is a PBGA will respond just like any other surface mount package. There may be a 5 degree delta between a PBGA 356 and a QFP208 but the two respond very similarly in the convection reflow environment. CBGAs
Electronics Forum | Wed Jun 06 20:25:06 EDT 2001 | davef
Good machine, good people; yer just about there. Look here for help: http://www.mot.com/SPS/PowerPC/teksupport/teklibrary/papers/BGA_AssemblyRework.pdf http://channel.intel.com/design/quality/component/rework_socketprofiles.htm Earl Moon, a depart
