Electronics Forum | Fri Mar 02 08:52:20 EST 2001 | markkrmp
Are your voids looking like blow holes also? Is this only occurring on the solder joints of the Thru Hole components and Via's? Or does this happen on SMD pads? My experience is that we have seen this but only with some of our older PCB's which are
Electronics Forum | Mon May 24 10:45:04 EDT 1999 | John Thorup
| Can anyone help me with the correct baking cycle for removing moisture for PWB's. These are 10 layer double sided SMT. | | Thank You R. J. Klein Wassink in Soldering in Electronics states - 16 hours @ 105C or 40 hours @ 80C in a ventilated oven
Electronics Forum | Mon Oct 29 15:58:47 EST 2001 | davef
Kitting: Buy-in material in kit form that is complete and in the proper form. Line set-up: Layout all boards to be the same width. Printer set-up: Use a dispenser, instead of a printer. Dispenser set-up: Program & debug off-line. Placement machin
Electronics Forum | Fri May 31 10:35:46 EDT 2002 | dason_c
I think that the IPC spec only apply to the MSD. I had a paper from Lucent and forwarded by Francois Monette, please aware that the first 2 hours, the moisture doesn't bake out from the assembly/component and result show that it is increase the weigh
Electronics Forum | Mon Oct 28 18:59:25 EST 2002 | tkenny007
Specs for Bow and Twist for PCBs (IPC-A-610C, 10.6. There may be an update by now). I also have a note in our quality guide referencing (IPC-TM-650, 2.4.22) and (MIL-STD-105D). In summary, a PCB should not bow more than 0.040" with all four corner
Electronics Forum | Fri May 07 16:24:08 EDT 2004 | bruce @ knoll
I did have my solder analyzed and it is clean. The Hollis preheat coils are a bit hard to control but I have measured the board top side and I am getting a temp of 105c just before wave contact. I would like to move to a spray fluxer but I am going
Electronics Forum | Thu Jun 09 03:16:06 EDT 2005 | PSGill
I'm using Kester R520A Lead free solder paste. The flux % stated on the Certificate of Analysis(COA) when the product delivered to us is 10 %. The tolerance is 1%. But when i send the jar to an external lab to determine the flux % it is more than 11%
Electronics Forum | Fri Dec 09 05:03:35 EST 2005 | rlackey
Hi, I'd be inclined to go with the through hole capacitor, as to surface mount it you would probably need to go for an elco (ceramics & films don't do that value in that voltage, & you'd be hard pressed to get a tant in that voltage). SMD Elcos a
Electronics Forum | Fri Dec 29 15:02:33 EST 2006 | bman
We build quite a few cables ourselves, and we go through a lot of heat shrink labels. Unfortunately, we only use Brady heat shrink labels, so I don't know if I can help much. Are you actually running raw heat shrink through your printer? If so, go
Electronics Forum | Tue Jun 19 21:44:20 EDT 2007 | rfrog
The first thing that I would do is contact the smock manufacturer and ask them for advice on testing the smocks. ESD FROM A TO Z 2nd ed. (Kolyer) states that: smocks should have a resistivity of less than 10^12/sq and must not shed steel fibers.
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