Electronics Forum | Thu Mar 18 10:09:57 EST 1999 | Stefan Witte
| My engineering Dept. has informed me that they want | to start using pins, on an aluminum substrate in the | smt process. Pins are interconnect for daughter bds. | Dia. of pins 0.020" 0.040" 0.080" flat bottoms | 1) Does any one know how to
Electronics Forum | Mon Mar 08 20:17:41 EST 1999 | Michael Larsen
| | I'm having a fun time between BGA rework/repair using an SRT 1000 and SPC efforts (much easier) using DEK stencil printing processes and BTU reflow with 6 Fuji lines in between. | | Concerning the BGA stuff, I'm getting about 60% success using
Electronics Forum | Wed Jul 08 15:18:20 EDT 1998 | Upinder Singh
We are wave soldering a board having 24 similar thru hole connectors on it, using a wave soldering pallet. The problem is that one particular pin of connector in around 6-9 connectors get excess solder on the bottom side. I have tried all the parame
Electronics Forum | Thu Jul 09 17:12:00 EDT 1998 | Dave F
| We are wave soldering a board having 24 similar thru hole connectors on it, using a wave soldering pallet. The problem is that one particular pin of connector in around 6-9 connectors get excess solder on the bottom side. I have tried all the par
Electronics Forum | Thu Aug 09 23:11:23 EDT 2001 | davef
Cheery disposition??? Would a few ;-) ;-) ;-) help? [Oh and look who is talking, the one planning the Mickie D gig after the traces on the this board start vaporizing with the fuseable link schtik.] Are you sure you're getting flux all the way up
Electronics Forum | Mon Aug 19 20:45:31 EDT 2002 | davef
Bob Willis and Phil Zarrow have had a running commentary on the ability of reflowed solder to hold components on the bottom side during reflow. You can find references to their component weight to pad area rations in the fine SMTnet Archives. The
Electronics Forum | Tue Jun 19 17:42:38 EDT 2007 | dyoungquist
We run a TP9 machine and had a very similar problem with it. On a TP9 machine there is a power supply board where all the voltages are generated. It is located on the bottom side of the unit. The problen was with one of the fuse holders. The co
Electronics Forum | Thu Sep 13 17:29:02 EDT 2007 | fnorradd
I am currently having a problem with uncut legs on one side of axial components from a universal dual head insertion machine. Initially it was thought that the anvil on one side was engaging slow so I stripped down and changed the seals in the botto
Electronics Forum | Tue Jun 03 01:03:04 EDT 2008 | daxman
Hi, I think what you are describing is a half-etch QFN, which causes the 3 mil gap. In our process, we don't require solder to bridge this gap as it's internally connected to the bottom lead. I'm not sure if this is the question you're asking, but
Electronics Forum | Tue Sep 08 10:19:27 EDT 2009 | grics
Good Morning! I need some clarification. Our company is working with a start up company on some prototypes. On the bottom of the assembly they are placing a SOT23-5 component. It is being presented to the wave so the lead banks are parallel to the
