Electronics Forum | Thu Apr 24 09:41:55 EDT 2003 | caldon
You may want to contact Cookson Electronics as they are leading the surge on "LEAD FREE" You may want to post your question to Chyrs Shea at Alpha Metals (Cookson). cshea@cooksonelectronics.com She should be able to field your question and put you i
Electronics Forum | Wed Apr 23 16:07:11 EDT 2003 | davef
There are no standards, nor should there be. Why would you want assess the quality requirements for an underhood product upon a company that makes talking furballs? We find that for the largest part, the approach taken by the rocket scientist that
Electronics Forum | Wed May 07 09:02:17 EDT 2003 | Kris
Hi SnAg is a binary alloy and does not have the same effect as a ternary SnAgCu alloy as far the pasty range is concerned. But then paste only can do so much. The best way to do it is to have proper pad design, controlled placement and reflow. I w
Electronics Forum | Mon May 26 04:02:13 EDT 2003 | Franky
Dear sir, I think so with every idea , everyone is correct , paste , pattern of pad design ,profiling or solder mask on PCB ,and one of the cause of tombstone that I found is alignment of machine placing and solder printing , from my experience many
Electronics Forum | Tue May 27 10:34:30 EDT 2003 | davef
Much of the ability to survive rework or thermal excursions is dependent upon the fabrication materials. The board qualification criteria under the 55110 was designed around 5 thermal heat cycles. Consider reworking a BGA in this context. BGA i
Electronics Forum | Wed Jun 04 05:13:09 EDT 2003 | emeto
Hi Pete I agree with all that. But his question was "Are most people shying away from them in favor of BGA or do most people consider 15.7 mil to be "standard" technology these days?" So, the truth is people use both.QFP has advantages and disadvanta
Electronics Forum | Thu Jun 12 12:30:44 EDT 2003 | caldon
Edmunds Optics has them http://www.edmundoptics.com/IOD/DisplayProduct.cfm?productid=2038 the link above is for a Prism. Works well. Continued search on the Edmunds site will get you a mirror if need be. Cal Communications Test Design, Inc www.CTD
Electronics Forum | Tue Jul 01 16:01:17 EDT 2003 | caldon
REX- Contact ACI 610-362-1200 x224. The contact person is Mr. Jeff Stong. They are cheap and will give you a report. www.aciusa.org jstong@aciusa.org There are some other labs that do this...but we use this one as it is close to us and they do a des
Electronics Forum | Fri Jun 27 15:37:02 EDT 2003 | caldon
Charlie- You answered your own question...1206, 0201, 0603, 0805, 0402 are all the package dimensions. In addition Here is a generic link from practical components that list most package sizes, feeder size, tape type... http://www.practicalcomponen
Electronics Forum | Thu Jul 03 15:03:39 EDT 2003 | Jim Nunns
My design group wants to change our route keep out around all SMT parts to 5 mil even under the parts with zero standoff. Are others in the industry routing under parts that have no standoff? My fear is that we will get shorting if the mask is scaped
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