Electronics Forum | Tue Feb 26 10:55:58 EST 2002 | davef
This could be an electroless nickel / immersion gold specification. While the symmetry of the numbers is pleasing to the eye, but as Joyce Marchand says, "It doesn't blow-up my skirts." Problems with your specification are: * Lower end of the gold
Electronics Forum | Wed Jun 26 08:54:53 EDT 2002 | davef
it has a lousy gage. * Solderability testing machines from different suppliers produce dissimilar results. * Tests don�t well represent in-use. For instance, how does one test the solderability of a BGA? [Ooo, ooo. I know the answer. => For BGA and
Electronics Forum | Tue Aug 27 22:07:45 EDT 2002 | davef
Pad. Land. A portion of a conductive pattern used as a termination area. Metal surrounding a hole on a printed circuit board. Mask. A material applied to allow selective etching, plating, or protection of the surface of a printed circuit board.
Electronics Forum | Thu Sep 19 21:23:42 EDT 2002 | davef
I'm not saying that an eraser will necessarily work. What I'm saying is that some erasers may cause more trouble than the eliminate. Look here http://aic.stanford.edu/jaic/articles/jaic28-02-003_2.html We prefer a brand called Ruby Red. The "ole
Electronics Forum | Mon Jun 30 16:35:13 EDT 2003 | davef
Hi Steve We don�t double reflow this part. We wouldn�t consider it without a fixture or some other support. You know that sound, the almost involuntary sound that patrons in a restaurant make when a waiter drops a glass or a tray? It�s kind of an
Electronics Forum | Wed May 18 14:58:05 EDT 2005 | splice
Hi, I am having some PTH non wetting issues. Setup and chronology of events is explained: Set Up; Part: 1 MM pitch connector 378 pins Solder: Kester Ultra Pure 63/37 solder Pot; 250 C pre heat; Peak 94C top side Flux: Qualitek 775, Fluxer: foam T
Electronics Forum | Tue Sep 20 11:59:06 EDT 2011 | SheanDalton
Check specific gravity: According to a quick web search, the specific gravity should be 0.813 ± 0.003. If you have records of the specific gravity, compare current reading to past readings. Check pressure near stone: if you have records, compare
Electronics Forum | Tue Jul 27 11:32:01 EDT 1999 | M.L.
| | Presently protos of micro-bgas (80i/o) pitch .030/.031 | | 12BGA per assembly | | | | The board is a (.062, 4 layers) FR-4 using Dry film | | Pads .014inch | | Vias within footprint .020inch | | Vias to be filled by bottom side(solder side) only
Electronics Forum | Thu Jun 18 15:04:48 EDT 1998 | smd
| | | We're running into problems with board damage (broken traces, solder shorts) due to pliers and other bizarre tools being used for depanelization. I need some sort of fixture for this. A delrin plate with a slot cut to the correct depth and wid
Electronics Forum | Tue May 19 05:42:36 EDT 1998 | Earl Moon
| Earl, | I admit that I missed your article since I seemed to have let my subscription to Circuit Fabrication Magazine expire. I am interested in your experience in this area. Is there a way to get a copy of your paper? Could you maybe post it to
