Electronics Forum | Fri Nov 14 07:32:24 EST 2008 | davef
Yes, courtyard gives you the space requirement of a component. Sometimes, the working space of a rework tool takes precidence, though.
Electronics Forum | Wed Dec 17 11:25:38 EST 2008 | davef
dots of minimal height. So, use a lower viscosity adhesive. * Higher standoff components => larger (and taller) dots. So, use a high viscosity [typically, also high yield point] adhesive.
Electronics Forum | Wed Dec 17 13:34:15 EST 2008 | jorge_quijano
Ok, thanks for the info, fortunatelly we already have our Camalot glue dispenser machine In-line with our MPM, for helping whit the high stand-off components.
Electronics Forum | Tue Jul 06 12:06:32 EDT 2010 | baildl632
Is the board a two sided smt board? If so, where are the standoffs (board supports) located during the second side run? The 0805 being thicker than the 0603 may explain why 0805 was cracked less.
Electronics Forum | Thu Aug 05 14:58:18 EDT 2010 | mikesewell
Smaller and multi-row QFNs will probably require an oblique view/5-axis xray with resolution of at least 1 micrometer and preferably a nanofocus machine. Given the low standoff and small pad size, verifying wetting can be challenging on interior pad
Electronics Forum | Wed Aug 11 14:45:46 EDT 2010 | davef
Yes, it OK to mount axial PTH component as radial PTH, if that's what you're asking. * There are no rules for orientation. Pick something and stick to it. We like to be able to read the component value / orientation from the top towards the board.
Electronics Forum | Mon Oct 31 13:31:19 EDT 2011 | davef
We're not sure what a 'sticky roller' is, but will it: * Remove ionic materials * Leave no residue * Clean the walls of through holes and vias * Clean under low stand-off BGA and LGA
Electronics Forum | Fri Dec 13 10:06:05 EST 2013 | davef
For vertical mounted, axial leaded components; the standoff from the land to the component body should be 0.4mm[0.016in] to 1.5mm[0.059in]. Right?
Electronics Forum | Tue Mar 26 16:36:00 EDT 2019 | charliedci
80% on edge pads and >60% on center pad(s). So with this in mind the component body should stand off a bit.
Electronics Forum | Wed Jul 03 17:23:03 EDT 2019 | davef
Pavel Murtishev: Please click the link under my avatar [to the left of this message] and send me your email address.
