Electronics Forum | Mon Nov 15 20:56:20 EST 2004 | davef
In the most straight foreward terms, low residue fluxes are: * Less expensive than other flux types from an equipment purchase stand-point. [Obviously, this is a benefit to only those either without equipment or readily able to dispose of the equipm
Electronics Forum | Sun Nov 28 03:27:03 EST 2004 | jmedernach
Hi Guy, I see them frequently. Usually, if I have voids on my BGA's, I'll have them on my passives as well as at leaded device solder joints. They run rampant through the entire assembly. For me, it's a function of my profile. I only have a 4 zon
Electronics Forum | Thu Mar 03 18:09:06 EST 2005 | gpaelmo
We also use Indium NC-SMQ92J. We do the same as mentioned per Russ. We reduce apertures mostly on QFP's with pitch of 25 mil or less (we place down to 15 mil QFP). All other apertures we keep 1:1. We print resnet 0805 size with no problems. You might
Electronics Forum | Fri Apr 01 11:04:35 EST 2005 | chunks
A company called BEST makes a thing called Stencil Quik. It's like a stencil that sticks onto your board, you squeegee paste, place component/board and reflow. The Stencil Quik remains on the board. It prevents shorts and in your case could provid
Electronics Forum | Mon Apr 11 08:47:34 EDT 2005 | Rob
There's not many ways of doing it on the cheap except... Buy a second hand universal GSM1 with VME 630 vision, 0.5 mil per pixel camera & some expensive ceramic nozzles for the 0201's. This will be quite slow & the software quite awkward but lookin
Electronics Forum | Wed Apr 27 10:47:26 EDT 2005 | HOSS
A 1:1 pad to ball diameter will cause the balls to collapse more giving you less post solder component standoff. Depending on the application of this product and required reliability, you may want to stay with the padstack being used. You may try c
Electronics Forum | Thu Jul 14 19:12:40 EDT 2005 | sync40
Hi. In the past years I had made dozens of PCBs but now I am trying to get a professional finishing on them. The main problem is oxidation of the copper traces. Basically I use the silkscreen method to make the pattern in both layers and then etch. L
Electronics Forum | Thu Jul 21 02:54:10 EDT 2005 | Base
(... so hard to resist... Rob is probably going to kick my derriere for this post...) So was Assembleon... They first placed a very large QFP (think it was 208) and then placed a whole bunch of 01005's in between the leads. And to top it off they al
Electronics Forum | Wed Aug 16 20:54:51 EDT 2006 | PV
Hi Ahmad, I am using SRT 1100 for about 4 years. I like it but I am looking for something better. What ERSA Model you are using? Is it IR/PL 650A? I do BGA Reworks almost everyday. The most difficult Reworks I have had so far are a very small u
Electronics Forum | Wed Aug 16 20:55:13 EDT 2006 | PV
Hi Ahmad, I am using SRT 1100 for about 4 years. I like it but I am looking for something better. What ERSA Model you are using? Is it IR/PL 650A? I do BGA Reworks almost everyday. The most difficult Reworks I have had so far are a very small u
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