Electronics Forum | Sun Feb 05 09:49:11 EST 2006 | Cmiller
We have been using ENIG for 8 years as our primary board finish. We have not seen any issues with tenting the vias. We have used a number of suppliers. The ENIG from China does not seem to solder quite as well in general but only had black pad from o
Electronics Forum | Tue Oct 23 20:27:06 EDT 2001 | davef
WOW!!! How do people get these coo toys? Comments are: * IPC-7530 is not a specification. It is merely a guideline. [IPC-7530 �Guidelines for Temperature Profiling for Mass Soldering (Reflow and Wave)�] * What makes you say a 20-micron intermetall
Electronics Forum | Tue Dec 01 07:24:44 EST 1998 | Earl Moon
| Hi folks , | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspection
Electronics Forum | Tue Dec 01 07:54:49 EST 1998 | kallol chakraborty
| | Hi folks , | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspec
Electronics Forum | Wed Oct 24 11:14:44 EDT 2001 | Cemal Basaran
Dave; Thanks for responsding so fast. here are my answers. 1-WOW!!! How do people get these cool toys? I am with the University at Buffalo Electronic Packaging Lab. http://www.packaging.buffalo.edu We have pretty much everything that is sold on the
Electronics Forum | Thu Jul 27 21:57:16 EDT 2000 | Dave F
Hi Doug: Responding to your questions: � If gold over nickel is self limiting ... You didn�t say whether you gold plating was electroless or immersion. Electroless is not is self limiting. It can plate up to 5 thou. Expect immersion plated gold to
Electronics Forum | Tue Apr 17 10:16:42 EDT 2001 | davef
Welcome to SMTnet. Awww, those assemblers are always whining about something. Just tell him to shut-up and build the blankin� boards. Jeesh!!! We used to have copious archives on the topic on SMTnet and our friend Brian is working his fingers t
Electronics Forum | Fri Sep 11 09:45:39 EDT 1998 | Earl Moon
| I'm very familiar with the great board space savings of BGA and all the "claims to fame." However, can someone out there tell me if any concern exist in the inspection realm. Additionally, solder cracking, CTE/TCE mismatches, no leads for stress re
Electronics Forum | Tue Jan 04 12:37:41 EST 2005 | Cmiller
We have been using this finish almost exclusively for fine pitch boards for about 5 years. Make SURE you use a board house that does the gold plating in-house. There are some potential issues as DaveF stated. The only problem we have encountered is w
Electronics Forum | Tue Dec 01 09:02:18 EST 1998 | Earl Moon
| | | Hi folks , | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our in
