Electronics Forum | Fri May 14 15:03:19 EDT 1999 | lima
| | Does anyone know of any industry guidelines for the exhausting of volatiles in reflow ovens? I've seen some numbers like 1,000ppm for the oven atmosphere, but is this typical? | | | | My concern is the volatiles in my WS629 solder paste may be
Electronics Forum | Sun Apr 25 19:03:13 EDT 1999 | Steve Gregory
| Again, I know this does not answer your needs. I do believe there to be a cheaper system than ours that will satisfy your needs. Big Steve found one that seems fairly reasonable for less damandig boards than ours. | | Earl Moon Hi Joe! Yeah Earl
Electronics Forum | Wed Apr 21 22:15:12 EDT 1999 | Chris
| I'm having problems with trying to get a good solder joint using a Ceramic PCB. We are using AMTECH hi-temp solder (ws-486 96.5/3.5ag). My profile looks great and I used the recommended profile from Amtech with a few adjustments. My max temp is abo
Electronics Forum | Tue Apr 13 18:39:24 EDT 1999 | Tom B
| | Netters, | | | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | | | 1. Kester 293 no clean | | 2. 2.1 C/s for 30s to 150 C | | 3. .5 - .7 C/s f
Electronics Forum | Tue Apr 13 23:08:56 EDT 1999 | Jeff Sanchez
| | | Netters, | | | | | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | | | | | 1. Kester 293 no clean | | | 2. 2.1 C/s for 30s to 150 C | | | 3.
Electronics Forum | Mon Nov 02 17:45:46 EST 1998 | ChrisK
In my experience, solder balls are normally caused by only a few things. In order of likelyhood: 1) Water based fluxes (VOC-Free)not having the water carrier completely dried from the board before going into the solder. I.E, too fast conveyor spee
Electronics Forum | Sat Oct 24 23:30:59 EDT 1998 | Pete Sorenson
| I know that this not surface mount, but many of us have to perform multipule duties. Can anyone give me some information on this I am having problems getting relibility | getingthe heat seal ribbon to make consistant electrical contact. | Any help
Electronics Forum | Tue Sep 01 10:32:51 EDT 1998 | Ben Salisbury
| We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, carbon bed, mixed resin bed, ca
Electronics Forum | Tue Jul 28 02:22:59 EDT 1998 | Bob Willis
Here is what I would do faced with your problem. First I would profile a similar board or use an existing profile. From there I would place the dummy device on the surface of a sample board with a thin thermocouple soldered to the board surface under
Electronics Forum | Mon Jun 08 15:01:02 EDT 1998 | D.Lange
| I work QA at an OEM in Alberta, Canada. I saw earlier posts on the smtnet regarding PCB haloing criteria. I am currently in a dispute with my PCB vendor over the acceptability of haloing (delamination) around plated through holes and vias on a lot
