Electronics Forum | Mon Sep 23 14:08:38 EDT 2002 | rocco
Hello My question is if the diferent types of allows that components manufacturers have considered like SnAg,SnCu,SnBi,NiPd,etc for platings instead Pb Have special handling at storage,floor handling and re-using as well as reworking ... Consideri
Electronics Forum | Thu Dec 14 14:29:53 EST 2017 | barryg
We did check for oven clearance thinking the same , but there is plenty clearance. We have however found that the problem was on several lots of PCBs. We ran a fresh lot and problem went away. There appears to be some kind of contamination on the PCb
Electronics Forum | Fri Nov 13 23:33:33 EST 1998 | Kallol Chakraborty
| | | I believe that gold fingers on my circuit boards are being | | | contaminated and need to clean them with some chemical | | | solution. Any recommendations. | | | | | Chuck: What is the type and source of your contamination? Dave F | | We a
Electronics Forum | Wed Jul 24 23:21:26 EDT 2002 | ppcbs
Being in the line of BGA rework and having performed much rework on boards that go into military planes, I can give you an opinion from a practical background rather than an in depth study. Basically BGA's have caused many of my customers big headac
Electronics Forum | Mon Sep 28 09:35:28 EDT 1998 | Clive Heke
I have had some field failures returned recently, the boards had flux contamination under the components in a sensitive area, Nothing really visible until the component was removed, and the board had no evidence of rework of any type. Is it possib
Electronics Forum | Sun Jul 26 20:56:43 EDT 1998 | Masdi Muhammad
We are trying to reduce the number of units fail at system test due to flux on gold finger. We know so far that the flux is deposited onto the goldfinger during touch-up or rework and to reduce the contamination we are planning to implement 'tapin
Electronics Forum | Sun Sep 22 13:14:56 EDT 2002 | scottefiske
Stop the lines...! Stop building defects and rework into your product. Contact Fab Supplier and have pipeline filled for small amount of replacement fabs to keep lines running and limiting production scheduling and impact. Request to have the board
Electronics Forum | Sat Mar 20 08:54:28 EST 2004 | Primus
As I said, I'm new, and I've never seen the adhesive dot method. I'm certian our company will stick with paste, though, because we make our own boards (with a vertical plater no less!!!) and contamination is quite an issue. We do a fair amount of rew
Electronics Forum | Thu Sep 13 11:27:28 EDT 2007 | davef
After receiving either a water soluable or low residue soldered board for rework, in a real life work environment, regardless of the quality of the documentation, we can picture it a bit confusing for troop to consistantly select the proper combinati
Electronics Forum | Fri Jan 29 21:31:46 EST 2010 | aqueous
I would recommend the following paper entitled "Cleaning for Reliability Post QFN Rework" by Mike Bixenman (Kyzen) and myself (Aqueous Technologies). While it discussed cleaning under QFN's in a batch environment, it is also applicable to cleaning u
