Electronics Forum: warpage (Page 21 of 30)

Re: Reflow parts moving

Electronics Forum | Wed Sep 08 13:36:27 EDT 1999 | Wolfgang Busko

| Hello: | We are using a Heller 1500S reflow oven to solder surface mount parts. Just within the last two weeks, the larger I.C.'s are moving while going through the oven. The parts are checked for placement before putting into the oven. When

Re: Reflow parts moving

Electronics Forum | Wed Sep 08 14:31:48 EDT 1999 | John Thorup

| | Hello: | | We are using a Heller 1500S reflow oven to solder surface mount parts. Just within the last two weeks, the larger I.C.'s are moving while going through the oven. The parts are checked for placement before putting into the oven.

Solder On Gold

Electronics Forum | Sun May 16 03:38:49 EDT 1999 | Zambri

I'm running memory module product- SMT double reflow ( 12 modules per panel). I'm using the epoxy base solder paste in order to reduce the flux spattering problem onto the gold finger which could lead to the intermittent contact problem. I don't fa

Re: Solder On Gold

Electronics Forum | Wed May 19 11:07:25 EDT 1999 | Glenn Robertson

| I'm running memory module product- SMT double reflow ( 12 modules per panel). I'm using the epoxy base solder paste in order to reduce the flux spattering problem onto the gold finger which could lead to the intermittent contact problem. | | I do

Re: Conductive Epoxy

Electronics Forum | Mon Dec 07 09:22:50 EST 1998 | rick

| Does anyone have any information or experience with the use of conductive epoxy in leu of solder. I have a unique application that might lend itself to this technology. I am looking for manufacturers, printing, curing and reliability info. | Any in

Re: Problems with wave solder

Electronics Forum | Thu Nov 19 06:20:44 EST 1998 | Kelly

| For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the wave solder a

I agree Dave.

Electronics Forum | Tue Oct 27 09:57:37 EST 1998 | Dave

I completely agree with what Dave said previously about the trimming process. I spent the first 6 months at my current job removing this process from our assembly floor. We had several problems with the process including: 1) "flags" from the leads

Re: BGA ball missing.

Electronics Forum | Thu Aug 27 20:06:25 EDT 1998 | Kallol Chakraborty

Hi folks, Lately I am also having problem with BGA ball problem. We are finding more and more on X-ray analysis and is very expensive to replace. I know for sure that we could rework on CCGA but there is no certified process in industry as we speak

Re: BGA ball missing.

Electronics Forum | Sat Aug 29 09:12:39 EDT 1998 | Dave F

| Hi folks, | Lately I am also having problem with BGA ball problem. | We are finding more and more on X-ray analysis and is very expensive to replace. I know for sure that we could | rework on CCGA but there is no certified process in industry as w

Re: Excess solder on pins

Electronics Forum | Tue Jul 14 15:21:28 EDT 1998 | Brian Conner

| We are wave soldering a board having 24 similar thru hole connectors on it, using a wave soldering pallet. The problem is that one particular pin of connector in around 6-9 connectors get excess solder on the bottom side. I have tried all the par


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