Electronics Forum | Tue Aug 28 08:28:30 EDT 2012 | rgduval
We agree with all of the previous comments, and would add the following: Warpage is generally caused by excess moisture in the raw boards. Have you tried baking the boards prior to assembly? We had this issue on a simple 4-layer board, and found t
Electronics Forum | Wed Jun 25 03:49:17 EDT 2003 | M.DAttilio
Hello everyone, my company produce Alumina PCB. Till now we mount ceramic BGA on alumina substrate, but now it's hard to find ceramic components so we'd like to mount plastic BGA on this kind of substrate. Do you know problems about it? Please, if yo
Electronics Forum | Wed Feb 18 22:20:05 EST 2009 | LH Ng
Hi All, Does anyone know if there is any standard equipment capable for Ceramic/Alumina based PCB depenaling (cut into odd shape)? I am aware of diamond saw cutter, but it only limit to straight line cut. Thanks. LH
Electronics Forum | Mon Aug 06 17:29:07 EDT 2007 | gsala
Hi Gents, I heard people having concernes by using 2512R SMD resistors due to potential solder joint reliability defect(CTE mismach among ceramic/alumina+solder+PCB) when soldered by lead free alloys (SAC like). Any experience/news about solder j
Electronics Forum | Thu Aug 13 07:53:40 EDT 1998 | Earl Moon
| | Couple of questions. | | 1) Are we talking alumina substrates as the ceramic material? | | 2) Are we co-firing gold as the conductors on the substrate surface? | | 3) In other words, is this a hybrid thick film circuit? | | 4) If so, how large or
Electronics Forum | Wed Feb 25 08:30:44 EST 1998 | Earl Moon
| Happy Holidays All, | I am searching out a vendor (US preferred) who can fabricate a ceramic PCb with etremely fine lines. | Please reply if you are a vendor, or know of one. | Thanks, | Wendy CERAMIC CIRCUITRY Starting with hybrid thick film circ
Electronics Forum | Wed Feb 25 08:34:00 EST 1998 | Earl Moon
CERAMIC CIRCUITRY Starting with hybrid thick film circuits in 1965 at Sperry Flight Systems, I have been involved with ceramics (usually aluminum oxide) as the substrate material. Then, we developed "multilayer" circuitry (replacing "cordwood" module
Electronics Forum | Thu Feb 19 07:17:35 EST 2009 | mdavister
When I had to order ceramic (AL2O3, BeO, AlN) in the past, the fabricator always used a CO2 laser system for cutting holes and irregularities in the ceramic. Some companies that I have used that do ceramic cutting are: http://www.altinc.com/ http:/
Electronics Forum | Tue Jan 05 19:25:50 EST 1999 | Earl Moon
| Jan 05, 1999 | | My question is: | Pls kindly advise what is the meant by a "Think Film hybrid design" and what are the advantages it would have on surface mount passive components e.g. capacitors and reisitors?? | | Thanks for your respond. | El
Electronics Forum | Wed Jun 21 14:14:43 EDT 2000 | Gary Hunt
I need to construct test boards for which will be repeatedly subjected to Highly Accelerated Stress Screens, (HASS), and am looking for recommendations for materials. Would an Epoxy Glass or an Epoxy Glass Composite be least suceptible to exposure t
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