Electronics Forum | Thu Jun 18 09:26:38 EDT 1998 | Maurice McClain
WHAT SHOULD THE RATIO BE OF STENCIL APERATURE TO PAD TO GET GOOD QUALITY RESULTS. BY THAT I MEAN, A MINIMM OF SOLDER BALLS, AND LITTLE TO NO BRIDGING, SHORTS, ETC.. RIGHT NOW WE ARE USING A 1:1 RATIO, BUT ARE INVESTIGATING REDUCING THE APERATURE S
Electronics Forum | Thu Jul 12 08:49:14 EDT 2018 | robl
Started with a 1 part shield and we had an 0201 tombstone due to the pad design. We changed the pad design but the customer wanted to be 100% sure, so we moved to a 2 part, adding the lid after verification. We also trialled the original 1 part c
Electronics Forum | Thu Aug 17 08:09:52 EDT 2000 | LarryK
We had an interesting problem this week that is along this thread. Had a project that had the same resistance value components, but one component was a 1% tolerance and the other was a 1/2%. Guess what? the operator got them mixed up. We have a first
Electronics Forum | Tue Jul 10 07:22:48 EDT 2007 | davef
Q1. Is kapton tape an industry accepted way of protecting gold pads from solder splashes? A1. No. It is more accepted to resolve the reason behind the solder splats, so that the added labor and cost of taping is eliminated. Search the fine SMTnet Arc
Electronics Forum | Fri May 17 20:11:32 EDT 2013 | isd_jwendell
I am familiar with TI's documents on QFN mounting. I do not have an X-Ray machine, so I worry about excessive voiding that could happen with using the thermal vias improperly. As a general rule-of-thumb, I print paste with a 25% reduction on the ther
Electronics Forum | Tue Jul 11 11:35:03 EDT 2000 | genglish
John, Dave. The adhesive deposition is on the second pass through the SMT area, the PTH components have previously been fitted during the axial / radial stages of manufacture. The stencil is 2mm thick with a 1.5 mm routing depth. the leads (cut & cl
Electronics Forum | Tue Sep 10 19:08:59 EDT 2002 | cp743
Brian, I believe that someone has given you incorrect info. Both of these vision types ignore protruding nozzles during vision processing. I am currently running 1608 components with a 1.0mm nozzle on a CP-643E series machine utilizing vision type
Electronics Forum | Tue Jan 14 11:02:59 EST 2003 | soupatech
I found a feeder with a 2mm pitch and was told that although it was made for the CP4, it would work with the CP3. Before we throw out a thousand bucks, has anyone had experience loading parts off of a 2mm pitch tape with the CP3? The part is a 1.6
Electronics Forum | Wed Oct 01 21:22:37 EDT 2003 | ramanandkini
We have a 1.6 mm thick automotive PCB board of size 35x70mm. One of our vendor has given us a batch with lesser soldermask thickness 5~8 microns. Will this affect the circuit board on a long term. What should be standard for the soldermask thickness?
Electronics Forum | Thu Oct 16 10:56:23 EDT 2003 | james
We received some parts from our stores room with out a part number. We have 2 to choose from one being a 5% and one being a .1%. Does the color of the resistor mean anything? Just need some help on this. Thanks.
