Electronics Forum | Fri Jul 04 00:36:25 EDT 2008 | shrek
Try a linear, very flat ramp rate on the order of 0.5 degrees celcius per second. I know this is hard to accomplish with a five zone, but try to lower the first couple of zones (the preheat zone), and then spike to reflow aggressively during your la
Electronics Forum | Mon Jul 07 11:46:29 EDT 2008 | aj
Hi All, Can anyone advise the spec for land size of a lead 0.2mm in width? I am placing a TQFP128 0.4mm pitch, the leads seem to be wider than the actual pads they are been placed on? I am also experiencing poor wetting on this part , it has NiPdAU
Electronics Forum | Fri Aug 08 13:21:14 EDT 2008 | RobP
With AOI it really depends on what you are testing. Not only what criteria, but what different types of components. We run a high volume low mix application for automotive checking for presense, positional accuracy, and all solder joints. We curre
Electronics Forum | Thu Jul 24 21:20:58 EDT 2008 | srt
Hi, Now we also facing voiding issue after rework .But this only happen to 1 BGA from diffrent PCBA.We also already change 3 type solder paste and fine tune the profile follow solder paste spec but problem intermitten happen again.Pls help to advic
Electronics Forum | Tue Aug 12 13:40:08 EDT 2008 | ck_the_flip
GR@ICS: Are you drag soldering or point-to-point soldering? Keep in mind. Drag soldering mimics wave soldering. Molten solder is contacting and dragging across the solder mask. Keep in mind, too, that "semi-matt" or "semi-gloss" will also tend to
Electronics Forum | Fri Aug 01 00:40:06 EDT 2008 | roc2x
thanks,my pad design is 24 x 23 mils and now I chnged my stencil to 24 x 20 mils ship inwrds to lower down my volume. My placement is and part data are ok. My reflow N2 is using 1000ppm, Actual is 700-800ppm I already prolonged my pre-heat butit only
Electronics Forum | Thu Aug 07 10:02:10 EDT 2008 | eyalg
We are facing low quality due to soldering opens with coilcraft inductors 0402CS-2N7XGLW. The termination used is(suffix L =RoHS compliant silver-palladium-platinum-glass frit. Did anyone had this problem in the past? Can we do better using T = RoH
Electronics Forum | Tue Aug 12 14:49:26 EDT 2008 | awegener
I'm attempting to pick and place a small rivet onto our PCB. The rivet should be attached via reflow solder. The rivet will be used to create a sandwich, holding together a frame and additional circuit board in a package. This part is intended onl
Electronics Forum | Fri Aug 15 00:51:30 EDT 2008 | boardhouse
Hi Paul, My discloser, I sell for an offshore house, this is Crap.... Section 3.4.3 Annular Ring (External) of IPC-6012A, which also calls out Table 3-5, states that "Plated-through holes identified as vias can have up to 90 degrees breakout of t
Electronics Forum | Mon Aug 18 14:17:08 EDT 2008 | patrickbruneel
Here's another good one �Problems Implementing The Restriction of Hazardous Substances� http://desicritics.org/2008/08/17/120825.php Unfortunately it might take another 2 years to gather enough data on how much damage lead-free has done to our ind
