Electronics Forum: index (Page 4641 of 7929)

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 15:35:21 EDT 2008 | gregoryyork

Do those Balls pass IPC LOL Looks like the paste has been stored incorrectly probably stored stood upright and the flux medium has 'moved' so you have very rich flux areas and getting slumping due to it. Paste in cartridges should be stored flat refr

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 10:51:56 EDT 2008 | slthomas

ISSG, I didn't see you mention anything with respect to profiling. Should we assume that you've already ruled out any thermal issues? Based on the proximity of your problems to a big honkin' connector that's where I'd have looked first. But then a

Clean vs No-Clean

Electronics Forum | Mon Sep 08 10:34:37 EDT 2008 | blnorman

Because of our high volume production, we use no clean flux. We have experienced leakage currents with leadless QFNs. One problem is the part isn't being utilized as it should, but another is the flux residue. There is ionic residue in no-clean fl

Clean vs No-Clean

Electronics Forum | Tue Sep 09 10:29:58 EDT 2008 | wavemasterlarry

Wow, the anger grows deep within this one. Why not build some with and without no cleans flux? Nothing like real life stuff versus all these experts. Or start by cleaning and work your way out form there. I's rather clean and know i have good pro

producing membrane switches

Electronics Forum | Fri Sep 12 18:31:09 EDT 2008 | davef

2008 Euroland membrane switch symposium lists what they call leading manufacturers of machinery and consumables, including: � 3M � Fimor � Hurtz � Hy.tech Forming Systems � Kissel + Wolf (KIWO) � Luescher � MacDermid Autotype � Marabu � Mimaki � N

SMT LEDS SOLDERING

Electronics Forum | Tue Sep 09 07:03:56 EDT 2008 | mun4o

Hi All, we poduce diferent kind of Keyboards, and use a lot of SMT LEDs.When I looking for reflow soldering Conditions i n the Data Sheets, usually I find "IR-reflow" Soldering profile.Our Reflow owen have onli conventional heating.Is that problem?

SMT LEDS SOLDERING

Electronics Forum | Fri Sep 12 18:19:59 EDT 2008 | davef

Questions are: * Why aren't the defective LED blinking? * Do the defective LED blink when removed from the board and tested according to the functional test that you used prior to assembling the boards? * Do the defective LED blink after the solder i

SMT LEDS SOLDERING

Electronics Forum | Mon Sep 29 14:47:07 EDT 2008 | ikonify

Have seen similar problem before with regards the MSD being the cause. But also seen similar defects being found at functional test as the in-circuit test was injecting to much current during test. The devices were walking wounded afterwards. The in

D Connectors on both sides

Electronics Forum | Tue Sep 09 09:02:39 EDT 2008 | floydf

We are quoting a job that has about 30 50 pin D connectors on one side of the board, and about 10 on the other side. Barring any stroke of genius, we would wave solder one side, and hand solder the other side. Does anyone have any suggestions on how

62sn 36pb 2 solder

Electronics Forum | Tue Sep 09 16:17:45 EDT 2008 | boardhouse

Logannsan, you may want to check into this a little more with your customer to find out what 2 is. It could be as Vlad say's 2Ag -silver, or it could be 2CU -copper or 2Ni- nickel. Also check this form for 62Sn 36Pb 2Ag just my 2 cent. Regards


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