Electronics Forum | Wed Jul 25 10:57:08 EDT 2007 | cecil
Our board layout folks are currently designing a PWB using a 132 QFN. The component is .5mm pitch with .35mm square pads. The component manufacturer recommends the following footprint: .4mm square land .3mm square solder resist 1.why do they spec
Electronics Forum | Fri Sep 16 14:51:06 EDT 2011 | isd_jwendell
I recently did a layout for a Freescale accelerometer and the mfg recommended pad layout did something similar. They where very specific in the pad layout dimensions. They stated the reason was "With the correct footprint, the packages will self-alig
Electronics Forum | Fri Nov 27 08:58:39 EST 1998 | Des
I have a PCMCIA type pcb with an 0603 resistor situated exactly half way along the longest edge the device is 2mm form the edge of the pcb. I have experienced incidences of the device fracturing after breakout (hand operation) (pcbs are routed) Coul
Electronics Forum | Sat Jan 04 09:02:17 EST 2003 | davef
Q1. What is the recommended stencil thickness to apply the proper amount of solder for 0603 components? A1. The proper amount of solder is determined by: * Metal content of the solder paste. * Stencil thickness. * Aperture opening. * Other factors,
Electronics Forum | Mon Nov 01 16:41:58 EST 1999 | Robert Culpepper
Hello Mark, I can�t provide any hands on feedback with 0402 packages but we are using a no clean process with 0603 devices. Here are some parameters which will affect solder balling. Stencil thickness, aperture size, paste viscosity, snap off and bot
Electronics Forum | Wed Dec 03 01:36:35 EST 2008 | lococost
Is anyone wave soldering 0603 leadfree succesfully? We have no problems soldering them leaded, but lead free we see a lot of random skips and some shorts. We use SAC. We have tried different fluxes, flux settings, playing around with preheat, sol
Electronics Forum | Tue Dec 01 10:19:43 EST 1998 | Dave F
| I have a PCMCIA type pcb with an 0603 resistor situated exactly half way along the longest edge the device is 2mm form the edge of the pcb. I have experienced incidences of the device fracturing after breakout (hand operation) (pcbs are routed) Co
Electronics Forum | Tue Feb 10 05:58:14 EST 2015 | dberenguer
We have the possibility to buy a used Zevatech FS710 pick&place machine with vision. I've read that these machines used to be very well built but I'm wondering if it's capable to place 0603 parts accurately since it lacks a laser-type alignment AFAIK
Electronics Forum | Sat Jul 24 09:06:40 EDT 2004 | davef
We believe that many manufacturers' recommended pads should be close to the last resort. Recommendations are: * Standardize with the IPC guidelines or those by Jim Blankenhorn [ smtplus.com ]. Anyone that wants to change from that standard needs to
Electronics Forum | Mon Sep 30 09:12:18 EDT 2013 | rgduval
1 mm, recommended inspection range is from 1.5X to 3X magnification. For verification of rejects, 4X magnification is recommended. Cheers, ..rob
