Electronics Forum | Tue Aug 05 17:19:55 EDT 2003 | csimfgeng
Another variable is whether the ground pads have proper thermal reliefs. If the pad has solid ground plane around the perimeter, the heat being applied will quickly dissipate to the surrounding metal. A proper relief of the pad will prevent the hea
Electronics Forum | Thu Sep 02 22:23:44 EDT 2004 | davef
Dunno about something formal. After you specify your hole size and fill material, why not say something like: " Surface to be planar prior to final plating and metallization. Boards must be suitable for via in pad technology." We do not allow plati
Electronics Forum | Fri Nov 09 00:40:59 EST 2007 | cadcopac
We design and assemble PCB's and use a min of .015 thou over the component lead diameter without incident but if your component pad is in a copper mass either top or bottom this can create other problems especially if you don't have top heating as th
Electronics Forum | Wed Oct 25 13:42:32 EDT 2000 | Chris McDonald
I was wondering IF anybody has has success wave soldering a 50 (2 rows of 25) pin 0.050" pitch thru-hole connector. I seem to be getting alot of bridging no matter what I do. Is there a design spec for the size and shape of pads? The pads on the pcb
Electronics Forum | Wed Dec 05 07:25:22 EST 2007 | realchunks
All posters here are right. My point was you have to design your board to the process. You cannot simply take any connector and change it to Pin and Paste. So much depends on your aperture openings, hole size to pin size, board thickness, number o
Electronics Forum | Tue Sep 01 12:20:47 EDT 2009 | fujiphil
Manually load the board and activate the solenoid for table up/down. Goto I/O then check the status of the sensor. if the sensor was tripped when table is down, removed the pin and check for foreign objects. Or check the hole of the pcb, maybe the si
Electronics Forum | Tue Sep 14 16:09:50 EDT 2004 | HOSS
Adam, Is your fluxer giving you good coverage into the holes and to the top of the board? If your hole size in relation to the lead diameter is too small, this may be contributing. I'd check your fluxing first though. Just an aside.....We just sw
Electronics Forum | Mon Jun 19 14:53:28 EDT 2000 | Mike Demos
I'm looking for some design paramters for perforated tabs. These are the tabs that connect the circuit board to the break-away pannel material. I've never used these before, but I've seen some that have reportedly worked well. These tabs are ident
Electronics Forum | Tue Apr 11 08:57:35 EDT 2000 | Alfred
Can you get me a recommendation regarding a Micro BGA soldering. It is apparent there is a problem and I want to insure success by following recommended practices. Is there a particular solder mask configuration recommended, as far as stencil thick
Electronics Forum | Fri Jun 11 03:50:39 EDT 2004 | Scott B
We currently have an issue with via's in pads which we have been living with for some time. The problem has now escalated with the need to increase the via hole size to achieve PCB fabricators aspect ratio's. We are now not only experiencing solder d
