Electronics Forum: solder joints (Page 1 of 290)

Bad solder joints

Electronics Forum | Sat May 30 09:24:12 EDT 2009 | davef

head in pillow

Cracking solder joints

Electronics Forum | Mon Feb 01 16:40:45 EST 1999 | Dave Waddick

I have a product using high temperature solder to connect terminal pins to a PCB. The board is single sided copper, no plaiting. The solder is 95% tin 5 % silver. The flux is low activity rosin. The product is a subassembly. When the product is

Re: Cracking solder joints

Electronics Forum | Tue Feb 02 12:31:26 EST 1999 | John

I have a product using high temperature solder to connect terminal pins to a PCB. The board is single sided copper, no plaiting. The solder is 95% tin 5 % silver. The flux is low activity rosin. The product is a subassembly. When the product i

Bad solder joints

Electronics Forum | Fri May 29 23:11:08 EDT 2009 | isd_jwendell

Have you tried different board orientation through the oven, or have the boards been put through the same way each time?

Bad solder joints

Electronics Forum | Mon Jun 01 17:49:39 EDT 2009 | gregoryyork

Sorry looking at your profile again and considering its Aluminium substrate I would opt for an increase to the preheat or introduce a soak to the profile to get the PCB up to reflow. Try soaking between 175 - 200C sufficient enough to heat the whole

hybrid solder joints

Electronics Forum | Thu May 13 21:45:14 EDT 1999 | ardis

I am seeing reflow around my signal pins after being subjected to a profile of 204c for 1 minute and 225c for a min of 30 seconds. Signal pins are soldered into a copper plated alum. case with SB5 and then silver plated. The pins have a hot oil tin

Bad solder joints

Electronics Forum | Thu Jun 04 14:35:11 EDT 2009 | floydf

We wound up using a ramp to spike profile with 50 sec. between 150C and 217C and 90 sec. above 217C. The idea being the flux is still active when it hits reflow, and it stays in reflow long enough for the weird alloy in the parts lead to wet. All par

Bad solder joints

Electronics Forum | Fri May 29 08:25:13 EDT 2009 | floydf

We are getting what looks like cold solder joints on one of our boards. The boards have an aluminum substrate, and use OSP plating. The solder is lead free - 96.5 Sn, 3.0 Ag, .5 Cu. The flux is no clean. When we first had the problem, my solder profi

Bad solder joints

Electronics Forum | Mon Jun 01 17:41:20 EDT 2009 | gregoryyork

What is your squeegee pressure and size. Also does the pad sit on a ground plane, as it looks like it is partially reflowed so surface has gone but not coallesced properly which would indicate it is more a problem with reflow above 217-219C OR obviou

Re: hybrid solder joints

Electronics Forum | Fri May 14 00:28:09 EDT 1999 | Mike D.

I am seeing reflow around my signal pins after being subjected to a profile of 204c for 1 minute and 225c for a min of 30 seconds. Signal pins are soldered into a copper plated alum. case with SB5 and then silver plated. The pins have a hot oil

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