Electronics Forum | Sat Oct 09 09:07:48 EDT 1999 | Brian
| | | Can anyone tell me the formula/method to determine | | | the amount of weight that solder's surface tension can support. | | | (ie: Maximum weight of components soldered onto a bottom side | | | of a board during a top side reflow on a Paste/Pa
Electronics Forum | Sat Oct 09 09:18:21 EDT 1999 | Dave F
| | | | Can anyone tell me the formula/method to determine | | | | the amount of weight that solder's surface tension can support. | | | | (ie: Maximum weight of components soldered onto a bottom side | | | | of a board during a top side reflow on a
Electronics Forum | Sun Oct 10 17:50:00 EDT 1999 | JohnW
| | We've recently encountered this problem where one of our .050" pitch BGA's were reflowing at the wave thus causing shorts... The board was profiled with probes stuck to a QFP solder joint, an 0603, and one of the BGA joints. There was an almost
Electronics Forum | Fri Oct 08 10:08:48 EDT 1999 | Glenn Robertson
| | | | I have a board, 4 spacers needed to be soldered on the board | | | | first with the normal 62Sn37Pb alloy. Then, capacitors are manually soldered on the boards. The density of the board is quite high. If we wave soldered capacitors first,
Electronics Forum | Wed Oct 06 11:40:41 EDT 1999 | Debbie Alavezos
| | Hi, | | | | Help! Could anyone help to enlighten me on this? | | | | Question: | | | | If I have a CSP/BGA package of size X by Y and the standoff gap between the component and PCB is Z, What is the maximum allowable Y/Z or X/Z that using a n
Electronics Forum | Thu Sep 30 03:17:45 EDT 1999 | Brian
| Hi everyone, | | Greetings! | | I�ve got a 2-layered through-hole PCB�s having the following problems: | | Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB | Insufficient Solder and some solder ne
Electronics Forum | Thu Sep 30 07:03:05 EDT 1999 | Scott Cook
| Hi everyone, | | Greetings! | | I�ve got a 2-layered through-hole PCB�s having the following problems: | | Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB | Insufficient Solder and some solder ne
Electronics Forum | Tue Sep 28 06:33:43 EDT 1999 | Earl Moon
| | | | I'm trying to start a small SMT contract shop and I need | | | | assistance in selecting equipment. Quad seems to be the | | | | leader but if there is something else out there that can | | | | better suit me please let me know. My shop star
Electronics Forum | Tue Sep 28 11:25:32 EDT 1999 | Scott Cook
| | | | | I'm trying to start a small SMT contract shop and I need | | | | | assistance in selecting equipment. Quad seems to be the | | | | | leader but if there is something else out there that can | | | | | better suit me please let me know. My s
Electronics Forum | Tue Sep 21 13:10:10 EDT 1999 | Dave F
| Dear All, | | In order to understand the soldering technologies in SMT, I'd like to understand why some cards are soldered and then cleaned, or only soldered whitout water cleaning nor "ultra sound" wavelength. | | I mean that I wonder why we use
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