Electronics Forum | Thu Sep 16 08:47:39 EDT 2010 | headlad
I extended the pads to help ensure the component locates correctly and to allow for easier re-work should problems occur. I reduced the thermal by 5% but you may want to speak to your fabricator and ask what they require to ensure that the resist is
Electronics Forum | Sat Feb 12 09:08:47 EST 2000 | Sal
Experiencing a problem with a 208 PBGA device. I am achieving good wetting with the exception of one ( damn) pin on the outer corner.I have a really good profile but the worrying thing is that it is so inconsistant. Once this open pin failure is dete
Electronics Forum | Sun Feb 13 01:35:55 EST 2000 | Dean
Without further information my first guess would be lack of flux to "cut through" the ENTEK layer. Question: In X-ray is the suspect ball of equal diameter when compared to adjacent balls? If no then the volume of solder is different which would po
Electronics Forum | Thu Apr 01 11:53:33 EST 2004 | russ
You may want to tack a coup[le of leads first, making sure that the component is fully seated against the PCBA. Or what we do is apply solder to the E-Pad and the lead pads and then hit it with a "heat gun" until the solder melts on the E-Pad and th
Electronics Forum | Thu Feb 08 00:40:37 EST 2007 | Scott
I think that as long as the compliant portion of the pin is completely in the board, pin protrusion should not make any difference. I have seen some large Aerospace companies internal specifications and the two requirements seem to be that the compli
Electronics Forum | Thu Feb 10 08:25:02 EST 2005 | marakas
Could anyone advise what BGA rework rate we should expect with product that has 4 BGAs (224 pins, 196 pins, 160 pins, 48 pins). Negative factor is that we have old and tired pick & place - Panasonic MPA-G1 or MPA-V without AOI.
Electronics Forum | Fri Feb 11 02:42:17 EST 2005 | marakas
Thank you very much for your answer. We had: 1- 224 pins, size 19*19 mm, pitch 0.8 mm 4- 48 pins, size 11*7 mm, pitch 0.75 mm 1- 160 pins, size 15*15 mm, pitch 1 mm 1- 196 pins, size 15*15 mm, pitch 1 mm How many defects I should expect with th
Electronics Forum | Tue Nov 05 00:53:31 EST 2002 | YNgwie
How do we do press fit component rework ? I have connectors with 700 pins, and the rework part is a headache. What is the best method ? Thanks in advance.
Electronics Forum | Wed Nov 01 08:02:16 EST 2000 | Wolfgang Busko
Massimo: Do you encounter or see warpage of the device or the PCB, I think I remember that there was a thread about this topic of shorts of the corner pins of BGA. You might try the archive. Wolfgang
Electronics Forum | Thu Feb 10 09:09:30 EST 2005 | russ
99% (there will always be that one that gets jacked somehow). Your old placement equipmment may affect this by dropped parts that get underneath the BGA, etc.. hopefully the placement accuracy will at least get the parts halfway on pad and they will
