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Electronics Forum: past (Page 400 of 989)

Nitrogen Reflow - a source of BGA Voiding?

Electronics Forum | Mon Jul 25 17:20:47 EDT 2005 | Dreamsniper

I'm confused. A paste Supplier suggested to turn off nitrogen during reflow because it is one source of voiding of bga solder joints...is this true? regards, Dreamy

Harwin SM connector problems

Electronics Forum | Fri Jul 29 08:50:30 EDT 2005 | bandjwet

For these type of connectors proper underside board heating, a customized nozzle and careful past printing are the keys to reworking properly. Pls contact BEST Inc at http://www.solder.net offline if you need someone to look at these for you. Regar

Large PCB Paste Printing

Electronics Forum | Wed Aug 03 08:42:02 EDT 2005 | ianlg

Hi Here is one that can handle the size board that you are looking to print. http://www.reprintservices.co.uk/R29_Series_Screen_Printer.html Hope that this is of help. Regards Ian

Large PCB Paste Printing

Electronics Forum | Wed Aug 03 10:03:25 EDT 2005 | Rob

There's always a used MPM UP3000, they're cheap.... ....but there is a very good reason for this.

Reflow solder issues with 6pin SOT's

Electronics Forum | Tue Aug 09 12:09:26 EDT 2005 | mtd

I am having reflow issues with small 6 pin SOT's. The joints on these components still look like solder paste after the reflow oven. I have tried adjusting the profile on forced air oven. Any recommendations as what to change in the profile or proces

Reflow solder issues with 6pin SOT's

Electronics Forum | Tue Aug 09 13:44:48 EDT 2005 | mtd

The solder on the rest of the board looks good. There are no large components around these parts. We check the profile using a KIC and it met the recommendations of the solder paste manufacturer. I have not did a dip test of the board or components.

QFP Solder PROBLEM

Electronics Forum | Tue Aug 30 12:06:41 EDT 2005 | MM

All of your response were similar to our investigation. Paste was sufficient, pcb's and parts came from several different lots run in at least 2 seperate ovens. Joints look good but the solder is soft?

Stencil Cleaning / Zestron / Vigon

Electronics Forum | Tue Aug 23 10:59:37 EDT 2005 | cyber_wolf

Is there anyone out there using Zestron Vigon SC200 stencil cleaning solution? We were told that it can be used to clean SMT adhesive, water soluble, and no clean paste flux. Can anyone tell me anything about this stuff ?