Electronics Forum: electronic (Page 3986 of 7930)

reflow/cure/wave for double side assembly

Electronics Forum | Sun Oct 03 18:26:17 EDT 1999 | park

What are pro's and con's of reflowing top side first and curing bottom side chip components, and then wave soldering bottom side? How about curing bottom side first and reflowing top side later? What percentage of companies run reflow/cure/wave for

Immersion Gold

Electronics Forum | Thu Sep 30 10:30:11 EDT 1999 | Chris May

I am having problems processing immersion gold boards. The achieved solder joints appear acceptable a la IPC-A-610, but the resultant joint does not fully cover the land, i.e. you can still see an outline of gold pad. What is the best way to achieve

Re: BGA Warp

Electronics Forum | Wed Sep 29 03:41:32 EDT 1999 | Wolfgang Busko

| Hi All, | Any one experince BGA-chipset warp about 10-15mil after removing | from PCB? | FYI, the rework temperature for preheat was 170C from room | temperature about 30 seconds, & BGA was removed at temperature | between 190-200C. | Thankyou.

Re: BGA Warp

Electronics Forum | Wed Sep 29 22:50:57 EDT 1999 | Dave F

| Hi All, | Any one experince BGA-chipset warp about 10-15mil after removing | from PCB? | FYI, the rework temperature for preheat was 170C from room | temperature about 30 seconds, & BGA was removed at temperature | between 190-200C. | Thankyou.

Help!

Electronics Forum | Mon Sep 27 12:13:14 EDT 1999 | Eric Maddy

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 starting out is going to be kinda sm

lifetime tests of PCB markings

Electronics Forum | Sun Sep 26 06:17:58 EDT 1999 | Guido Vogel

Writing the final report for my engineering studies (microsystem technology) I'm treating the identification of PCBs from automotive applications by laser marking with a data matrix code. No I'm trying to set up a programme of how to test the lifet

water soluble mask

Electronics Forum | Sun Sep 26 05:27:35 EDT 1999 | Edmund

i had a problem here, during the wave soldering process, we apply a water soluble mask on the gold finger to protect it from contamination. But after washing, there is still some mask left on the gold finger. Can anyone pls advise is there any parame

Re: BGA step by step

Electronics Forum | Thu Sep 23 09:10:53 EDT 1999 | Wolfgang Busko

| I need know the types, characteristic specials for temperature, general characteristics and all I need know about of manufacturer for BGA. | | I Hope than you send my information about this. | | Try this Link http://mot-sps.com/soluti

Re: BGA step by step

Electronics Forum | Thu Sep 23 10:03:09 EDT 1999 | Wolfgang Busko

| | I need know the types, characteristic specials for temperature, general characteristics and all I need know about of manufacturer for BGA. | | | | I Hope than you send my information about this. | | | | | Try this Link http://mot-sp

Re: IR rework stations

Electronics Forum | Thu Sep 23 08:59:20 EDT 1999 | Wolfgang Busko

| Hiya, | | Could anyone please suggest recommended manufacturers of | IR rework stations for the removal of various SMT comps. | | Cheers | Why IR ? Ok, I�ve seen only one but that thing burnt the PCB before the solder was melting and costs a lo


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