Electronics Forum | Sat Aug 10 06:38:25 EDT 2002 | jojojameson
Dear Freinds, We are having 18000 sqfeet airconditioned space for pcb contract manufacturing.We had chipschooters,through hole machines & fine pitch placement machines with international standard.In addtion we had clean rooms & wire bond facilities.W
Electronics Forum | Tue Jan 15 06:05:37 EST 2002 | Romain
Dear all We have since few weeks problems with BGA solder joint integrity on ENIG finish. Under relatively very flexible of the FR4, the joint breaks between ball and PWB. When we take off the BGA for analysis, some of the pads seem very flat, totaly
Electronics Forum | Wed Jan 16 11:20:52 EST 2002 | bentzen
Hi... We tend to do a lot of footprint calculating for new SMD components. But what about the amount of solder paste on the solder pads. The amount of solder alloy is of cause determined by the stencil aperture size, stencil thickness and the sold
Electronics Forum | Fri Feb 01 10:19:22 EST 2002 | cyber_wolf
Whoa! I beg to differ my friend. The cure profile is VERY critical in Adhesive curing, especially if your are screen printing. When you screen print adhesive you are leaving it exposed to the atmosphere for a period of time. SMT adhesive by nature i
Electronics Forum | Fri Feb 22 00:20:41 EST 2002 | djarvis
0.005" for a distance of 0.120". I supply the cad file - they supply the blades - SIX PER SHIM - $300. Try it, you'll like it! Take yer set of overpriced, dooverlacky, hoity toity, rickerpoodley and a fandoogally, titanium, teflon, whacko the didd
Electronics Forum | Tue Feb 19 08:21:56 EST 2002 | jax
Armin, The obvious disadvantages for an in-line printer is initial cost and flexibility for smaller shops that depnd on high mix, low volume batch builds from their printer to support multiple projects at the same time. The advantage is quality a
Electronics Forum | Wed Feb 27 22:24:28 EST 2002 | davef
I own and have read this book. While it is better than the average soldering book, it is not the first book that I reach for in trying to sort through a problem. It introduces a broad range of soldering methods with a reasonable amount of detail, b
Electronics Forum | Wed Mar 06 12:14:34 EST 2002 | caldon
We would benchmark our times with the most experienced operator and them boost the time by 1/3. Example: If it takes Mary 3sec to insert the component, 3 secs to clinch and cut the leads (it is not advised to cut the leads after soldering), and 8 sec
Electronics Forum | Thu Mar 07 16:53:55 EST 2002 | PeteC
The AOI machines are basically to replace human inspectors. They certainly do a better job. First you have to look at why is there so much inspection. Usually its becuase people have no confidence in thier processes or lack the knowledge to create an
Electronics Forum | Wed Mar 20 13:54:56 EST 2002 | Aaron C
I am starting to use BGAs more and more in our process, which is using water soluble paste. Taking to the Paste Rep, he had pointed out that if you add Surfactant Packs to your inline water wash, that it would help get the water underneath the BGA pa
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