Electronics Forum | Fri Mar 20 05:07:16 EDT 2009 | rocko
Hi All, I was puzzled because of terrible blowholes in solder joints of gold plated odd-form components. I am very confused because all other components on the boards have perfect solder joints. Here are some process details: 1) Solder paste: N
Electronics Forum | Tue Oct 19 19:15:23 EDT 1999 | stephenmac
I would like to know how to measure the moisture in pcb's. I have experienced blowholes and am sure it is the board manufacturer. What is the limit and is there any way to correct the problem when moisture rich boards are already in your process. Th
Electronics Forum | Sat Mar 29 07:07:01 EST 2003 | mk
http://www.sipad.com/Motorola/MotorolaFlipChip.htm Check out this link. Sounds similar. mk
Electronics Forum | Sun Mar 30 20:21:44 EST 2003 | iman
we are using a "recommend supplier profile", and we have gotten back to the talking table with them over this profile specs. Thanks for the pointer, have ask them on this issue. Have also asked for their phase-transistion diagram to understand their
Electronics Forum | Mon Mar 31 06:53:09 EST 2003 | mk
http://www.sipad.com/Motorola/MotorolaFlipChip.htm Should work, I just tested it. mk
Electronics Forum | Wed Apr 09 09:44:12 EDT 2003 | iman
yes, we r profiling direct thermocouple attachment to the LGA pads. based on direct experience of yourself or others, what paste (brand/type3?/type4?/alloy?/flux%?) gives the optimal repeatable characteristic-patterns to minimize this defect?
Electronics Forum | Wed Apr 04 17:40:39 EDT 2007 | davef
Rob: How do you rework blow-holes and pin-holes? PTH plating thickness SB 1 thou or greater. Epoxy is hydroscopic. So, you should control the environment and/or bake the moisture from the boards before soldering. Search the fine SMTnet Archives f
Electronics Forum | Tue Aug 28 23:47:12 EDT 2007 | crashoveride
Blows holes are usually caused by improper amount of flux applied to the boards prior to WAVE process and, in some circumstances, can be related to the preheater settings.
Electronics Forum | Mon Sep 03 06:17:19 EDT 2007 | mun4o
hi, This is moisture problem, I think.I have similar problem.You must try to bake PCBs.I bake our PCBs in solder wave mashine , under solder pot.There T is about 80*C - after 6-8h the PCB is dry regards
Electronics Forum | Wed Jan 16 08:58:43 EST 2008 | Adam
Hi If I have an assembly where the solder joints are suffering from blowholes and Pinholes. Could these solderjoints be reworked/touched up to form a reliable/acceptable solderjoints ?
