Electronics Forum | Wed May 16 13:55:25 EDT 2001 | davef
Urethane and parylene have the best long term humidity resistance of the conformal coatings. Since yer not hep about urethane, try the parylene [http://www.paratronix.com/apps/, http://www.paryleneinc.com/, http://www.parylene.com/, http://www.scsco
Electronics Forum | Fri May 18 13:30:52 EDT 2001 | mparker
I will start with the statement that I think it is great that we have the ability to solder SMT components that emulates wave soldered components. With that in mind, I would want to find acceptance criteria to be similiar, regardless of the solder me
Electronics Forum | Mon May 21 17:35:37 EDT 2001 | davef
We agree with LarryK, the previous poster. We know of no such ISO document, either. ISO can be found at: http://www.iso.ch/iso/en/ISOOnline.openerpage. ISO should be able confirm our thinking. Continuing: (1) Please get back to us if you find s
Electronics Forum | Mon May 21 17:37:51 EDT 2001 | davef
IPC-2222, Sectional Design Standard For Printed Board For Organic Printed Boards talks to scoring parameters in para. 5.3.1. You can obtain the standard at: http:///www.ipc.org. and Document Center [http://www.document-center.com/home.cfm/sid=71285
Electronics Forum | Tue May 22 17:21:43 EDT 2001 | davef
BGA require placement accuracy of only 0.3mm (�12 thou), compared with a required placement accuracy of 0.08mm (�3 thou) for fine pitch devices. Even with this level of misalignment, plastic BGA self-center / self-correct during reflow due to symmetr
Electronics Forum | Thu May 24 16:17:33 EDT 2001 | jdtpfacreate
Mark, The trends are very much related to the market segments that they serve. For example you can look at the "Telecommunications" industry for the large PCB's. They are in products like network PCBs, Backplanes, switching equipment for telepho
Electronics Forum | Fri May 25 18:17:56 EDT 2001 | davef
No chart for you, but I will comment that a prudent product manager would require a substantial reason to accept the risk of product failure and loss of profit to redesign his / her product. We merrily assemble many boards each month that were desig
Electronics Forum | Fri May 25 17:25:25 EDT 2001 | morefun
Is anyone out there is the contract or the OEM sections using viscometers to check solder paste or glue for acurate process definitions. By this I mean check the materials viscosity over a period of time and measure the degradation of performance, t
Electronics Forum | Sun May 27 11:12:02 EDT 2001 | davef
Listen, you can figure this-out from your particular situation. Do this: 1 Talk to your operators and determine if they see viscosity changes in your materials. 2 Talk to the people doing viscosity measurements and determine if they see viscosity
Electronics Forum | Tue May 29 05:22:50 EDT 2001 | wbu
Why not find a rock to climb on instead of under ? You may find that it needs TRUST in your safety equipment ( harness, rope, slings, partner .... ) and concentration on your part to succeed that task. I haven�t checked those proposed parameters bu