Electronics Forum | Thu Jun 25 16:13:05 EDT 1998 | Mike McMonagle
I am looking for a little enlightenment with an issue that we have been seeing. We have SMT assemblies with poor solderability on TSOP and mini-QFP type devices. The solder appears to have incomplete reflow and/or grainyness to the joints. Everything
Electronics Forum | Wed May 20 07:13:15 EDT 1998 | smd
Does anyone use the "Quick Frame" with their Dek printer? The threads on the screws keep stripping, so we thought maybe we'd send our frames to a machine shop for heftier screws. Has anyone done this? Is there a better way? Isn't it weird how Alpha k
Electronics Forum | Wed May 20 19:35:59 EDT 1998 | Rin Or
| Does anyone use the "Quick Frame" with their Dek printer? | The threads on the screws keep stripping, so we thought | maybe we'd send our frames to a machine shop for heftier | screws. Has anyone done this? Is there a better way? | Isn't it weird h
Electronics Forum | Mon Sep 24 11:12:56 EDT 2001 | nwyatt
Hi. We are currently using an unconventional method to rework a micro BGA - removing component with hot air, fluxing the area, placing the part with pick and place, then reflowing it in the oven. The reason we are doing it this way and not with a r
Electronics Forum | Tue Oct 16 11:51:26 EDT 2001 | bobm
i am using the epibond. i had alpha come in and look at our set up. they told me that the epibond can be reflowed at regular temp profiles with no problems. because i only have one oven and two pick n place machines it was important to be able to run
Electronics Forum | Thu Apr 18 17:29:00 EDT 2002 | dason_c
The industrial standard is follow the R.O.S.E test as a guideline per J-STD-001 and the limit is 10ug/sq. inch. Different tester with different equivalent factor with the ROSE and you can refer back to the manual, the Zero Ion tester with equivalent
Electronics Forum | Thu May 30 10:45:16 EDT 2002 | sjpence
We got a similar alloy Sn05Pb93.5Ag1.5, of Alpha Vaculoy bars. It is not the eutectic alloy you were looking for but it is close. This alloy and similar high temperature alloys are used in downhole electronics and so a supplier in the Houston area
Electronics Forum | Thu Jun 06 12:24:30 EDT 2002 | cyber_wolf
Brad your theory sounds good, but I have seen this happen at very low ramp rates .5 deg to 1.5 deg C rate of rise a sec. with the same soak duration you mentioned. If flux spattering is the case and you are using Alpha paste..switch to Indium and yo
Electronics Forum | Wed Jun 26 10:36:24 EDT 2002 | Steve L
Thanks for all of your valuable inputs. The paste we are useing is PWS0111Ae36 (Alpha MEtal), peak temp from 210 to 225 C. The paste was on the floor about 3 weeks. ianchan, when you mentioned "no more than 6 hrs in the stencil", you mean no more t
Electronics Forum | Thu Sep 05 18:15:15 EDT 2002 | pjc
There are chemistries out there that will solublize some post-solder NC flux residues. I have had success with Zestron material Vigon A200 and Petroferm material Hydrex DX. Go to http://www.zestron.com and http://www.petroferm.com These are chemical
