Electronics Forum | Thu Mar 29 14:55:59 EDT 2007 | HOSS
Hello, I searched the forums and found little specific info on LGAs with interior lands. This is not a QFN with a center pad. This is a multi-row BGA without solderballs. I'm looking for recommendations on PCB land to part land ratio, stencil a
Electronics Forum | Fri Sep 14 09:30:29 EDT 2007 | russ
That is inherent issue with lead free, you may want to ask your customer to reconsider this specification, It was probably initiated during the pb days when an exposed pad could signify a reflow issue. Overprinting will give you solderballs and unle
Electronics Forum | Tue Jan 20 07:57:00 EST 2009 | mrdtech
Depends on the solder paste. If it has been on the stencil for 24h there is a good chance that the paste is destroyed. You can however check if it has not dried out too much by letting the stencil printer do a few strokes and see if the paste still h
Electronics Forum | Thu Aug 06 19:20:09 EDT 2009 | boloxis
easy, just dip the ICs on a very weak solution of Nitric Acid, by very weak I mean like drops of Fuming Nitric acid in a half full DI water beaker. Place the beaker on a Ultrasonic bath and dip/shake the ICs in the solution in 5~ 10 seconds only. You
Electronics Forum | Thu Aug 22 16:25:18 EDT 2019 | scotceltic
Yes, unfortunately a lot of datasheets these days do not contain the temperature resistance to determine if it can handle the PIP application. In the past I have always used a 250 C at a min of 5 sec for the material. Also, the part should have sta
Electronics Forum | Thu Aug 24 12:35:30 EDT 2000 | Wolfgang Busko
The dilemma with this is that the search in the archive is often not that enlighting as someone might hope. Fact is that each new question (and the answers as well) on old topics adds to the archive making it not better. Well, and than look for the r
Electronics Forum | Wed May 12 17:37:08 EDT 1999 | Timothy O'Neill
| I am looking for anyone who has converted over to VOC Free flux. I need some info on any problems, etc. that you might have had. | | Please E-mail me at wes.ruggles@vickers-systems.com or call at (513) 494-5229 | | Thanks | Wes Ruggles | Hi Wes
Electronics Forum | Tue Sep 22 12:58:18 EDT 1998 | Chyrs
| How can I solve the small solder ball in the N2 W/S ? | The Oxygen level is 10000~20000ppm & no-clean flux. Yuen, Sorry I an't got an answer, just more questions. 1-2% O2 in your wave solder - are you running membrane generated nitrogen? I don't
Electronics Forum | Tue Aug 22 19:47:57 EDT 2000 | Dave F
No you're NOT, Jax, you�re 100% correctamuno!!! Thanks for setting-up the soap box. I believe that responding to repeated questions other than referring the person to the archives degrades the Forum. This Forum is pathetic in its pandering to peop
Electronics Forum | Fri Jun 22 05:03:29 EDT 2001 | wbu
no - can it be left uncleaned on the board? ---> for many applications yes says our supplier and many companies do ( techi over there) - are our products specified for conditions that we and our customers can live with that? ---> well, at first
