Electronics Forum: rework (Page 272 of 293)

No Lead BGA Hot Gas Rework

Electronics Forum | Mon Apr 12 09:36:57 EDT 2004 | wgaffubar

Russ, These are the pb free components that you mentioned that are coming around the bend. Not the old CBGA's. I use to use CBGA's alot with former company. These are 15 x 15 mm plastic BGA's with 14 mil pg free solder balls going on 8 mil gold pads.

No Lead BGA Hot Gas Rework

Electronics Forum | Tue Apr 13 13:45:26 EDT 2004 | arcandspark

Ken you say reaching 218 to 221 C will give a homogenus solder ball. The pb free solder balls on the BGA reflow at 235 C to 238 C but I have seen when you combin to differnt types of solder say 63-37 and 10-90 you will atually lower the melting point

No Lead BGA Hot Gas Rework

Electronics Forum | Tue Apr 13 22:48:11 EDT 2004 | Ken

I assumed the balls were tin/silver 221C or tin/silver/copper 218C liquiduous....but, this is obviously not the case. It looks like you balls are almost pure tin (mp=238C) You are correct. This is exactly the same as using 10/90 high temp balls o

Large Voids with Via in Pad

Electronics Forum | Tue Apr 13 09:46:39 EDT 2004 | davef

Now, that's different. We misunderstood the problem from your original descrtiption. We thought the voids were showing at the via in the pad. Now, we understand the voids appear to be in the solder balls. Suggestions are: * Search the SMTnet Arch

Can anyone recommend a reflow profile for already flowed solder?

Electronics Forum | Wed Apr 21 11:33:20 EDT 2004 | tigerlordgm

As one of our small batch processes, we place BGAs on PCB without using solder paste. We apply tacky flux to a predetermined height on a pallet, "dip" the BGA into the tacky flux to wet the solder balls to the set height, and then use a BGA rework st

Can anyone say NOT to use my reflow profile???

Electronics Forum | Wed Apr 21 18:24:13 EDT 2004 | pjohnson@volterra.com

Simple process - we use similar Kester solder brands of "no clean" low residue solder wick to clean our pads, then brush with isopropyl, and apply Kesters brand of tacky flux under a Leica 6x microscope. We do this on 7x7mm and 9x9mm packages. This w

Glenbrook Technologies X-Ray: Anyone using this??

Electronics Forum | Wed Jun 23 12:25:13 EDT 2004 | Cal

JD- I have used a few of GlenBrook's machines.. Jewel Box 70, Jewel Box 90, and RTX-113. Currently we have the RTX -113 on our shop floor as we speak. I like the machine but wished I would have went for for the angle viewing option or even the BGA so

AOI System

Electronics Forum | Thu Jul 01 13:47:25 EDT 2004 | Tom B

Good Day! I am looking to purchase a Cyberoptics KS-Flex 18 AOI system, I have a couple of question that if you could answer, I would most appreciative. 1) Model and length of time used. Do they use AOI for all pwbs or just the more complex a

Air Bath Rework System

Electronics Forum | Wed Dec 22 17:03:23 EST 2004 | jamesd

Shameless? In APE's experience not so - air velocity/power is extremely important in carrying energy to the board and close loop control of that energy is crytical in maintaining a controlled environment - if a machine design requires that air is for

Skewing of parts

Electronics Forum | Tue Jul 20 12:49:38 EDT 2004 | mmjm_1099

We are having a problem with our Heller 1800W oven with certian parts skewing. It seems that some inductors and taller Can caps are shifting around in the oven. It seems it will solder fine and than all of a sudden just be off to one side or the othe

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