Electronics Forum | Mon Dec 27 22:45:58 EST 1999 | Jim
Is there a way to avoid the reliability problems arising from the tce mismatch between ceramic chip smc's and FR4 laminates, without spending an arm and a leg on expensive substrate materials? Are there inexpensive substrates with reasonably compata
Electronics Forum | Tue Dec 28 12:34:03 EST 1999 | Justin Medernach
Jim, I wouldn't sweat a TCE mismatch between Ceramic chip components and FR4. No need to worry. 99.5% of consumer product out there utilizes this exact technology with no threat of failure due to CTE mismatch. The terminices of the components occu
Electronics Forum | Thu Dec 30 21:22:12 EST 1999 | Jim
Mike, Thanks for the reply. It's not really a matter of slope. It is the long term thermomechanical fatigue that the solder joint undergoes as a result of repeated severe temperature swings, while the product is in use. Non-leaded parts are suscep
Electronics Forum | Fri Oct 05 09:15:23 EDT 2001 | Ben Bierlein
It is a PCB material that has a woven glass / epoxy internal core and glass veil surface. It is in between the paper materials (FR1,FR2 and CEM1) and FR-4 as far as strength and cost. It is available in HiCTI material for high power applications.
Electronics Forum | Tue May 25 13:30:38 EDT 2010 | nikopolidis
HI Please Advice witch material can stand more heat FR4 or CEM3. PCB assembly will be used under the body of toaster Temp. range 90°C Could anyone tell me the difference in PCB material For imcoming quality control. Thanks & regards Fotis
Electronics Forum | Fri Jun 04 01:13:31 EDT 2010 | boardhouse
Hi fotis, Big difference between Cem3 & FR4 is that FR4 the glass is woven and Cem3 is sheet glass non-woven. for Multi layer product, i would not consider Cem3 due to increase chance of de-lam due to lack of weave for strength. Cem1 and Cem3 are
Electronics Forum | Fri Jun 04 11:28:15 EDT 2010 | mikesewell
At 400C, I'd worry about the solder as well....
Electronics Forum | Wed Jun 23 07:24:55 EDT 2010 | szpcbpartner
welcome to PCB Partner, there are more than 2300 PCB suppliers here. http://www.pcbpartner.com
Electronics Forum | Thu Jul 22 02:58:25 EDT 1999 | George Verboven (Process Engineer)
| We are considering adding surface mount components to a board we currently produce. The board is made from CEM-1. Has anyone had any problems with surface mounting to this material? We use a glue/place/cure process. | | Thanks in advance, | |
