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 | Thu Sep 10 21:48:37 EDT 1998 | Dave F
| 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 | Thu Sep 03 14:09:22 EDT 1998 | Matthew Park
Rich, From my experience, few causes of capacitor cracking are: - mechanical stress caused by pick'n place nozzles and chucks. Try to isolate and find cracked caps before boards go thru reflow or wavsoldering. - thermal stress by reflow pro
Electronics Forum | Fri Aug 21 13:43:13 EDT 1998 | Ben Salisbury
| Hello everyone, | I am currently running a gold plated SMT board and am experiencing tiny solder balls between the pads and the masking between the 20 mil pitch devices. I'm looking at these boards with a 60x microscope. IPC-610 say's any visible s
Electronics Forum | Thu Aug 06 13:09:57 EDT 1998 | Bob Willis
| Bob | I have had problems with spotting on gold contacts for many years and have spent many hours working on ways to solve this problem. Once a source of the problem is found and corrected the next month another source will crop up (new operator o
Electronics Forum | Tue Jul 28 02:13:57 EDT 1998 | Bob Willis
There is a procedure for profiling on my web site that may be of use to start with www.bobwillis.co.uk | We are about to run our first BGA devices and would appreciate some confirmation on a few points. | First some details: | PCB & Device: | ======
Electronics Forum | Fri Jul 24 13:17:55 EDT 1998 | Ben Salisbury
| Does anyone out there know of anyone renting equipment to record video of reflow actions? I am looking for a hi-temp camera to run behind boards in my ovens to record what's happening in there. We have some crazy stuff going on with some boards. He
Electronics Forum | Thu Jul 23 11:39:16 EDT 1998 | Russ Miculich
Are you using a HASL board or an organic protection on the pads? This will help determine as to whether paste is necessary or just a very active/tacky flux should be used. Tight process control will also help in the reflow oven. Many users don't wan
Electronics Forum | Wed Jul 22 10:21:46 EDT 1998 | Dave F
| Hi all, | I am new to SMT. In past I've made many PCB boards with my small hands at home, but I've used regular technology drilling the holes for the components. | I am trying to use SMT for my projects. SOP packages I was able to solder using a re
Electronics Forum | Fri Jul 10 10:40:13 EDT 1998 | Todd N
Hi all, We are currently having problems with a laser-cut stencil that is electropolished and nickel plated with 9-mil openings. The paste does not release well from the apertures. We are having to wipe after every print. The board is fixtured well a
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