Electronics Forum | Wed Aug 28 19:35:13 EDT 2002 | ppwlee
Hi, Does anyone have guidelines on minimum SMT component spacing for bottom sided wave soldering? I am looking for general rule of thumb in wave soldering bottom side SOTs, 0805 & 0603s. How about minimum through-hole lead to pad distance? Peter
Electronics Forum | Wed Aug 28 19:36:29 EDT 2002 | ppwlee
Hi, Does anyone have guidelines on minimum SMT component spacing for bottom sided wave soldering? I am looking for general rule of thumb in wave soldering bottom side SOTs, 0805 & 0603s. How about minimum through-hole lead to pad distance? Peter
Electronics Forum | Thu Sep 12 18:54:21 EDT 2002 | scottefiske
PTH to SMT spacing should be 80-100 thous. any closer will result in bridging. Scott
Electronics Forum | Fri Aug 30 16:47:56 EDT 2002 | davef
Ooops, sorry Peter. [Those pesky decimal points.] I meant to say �150-200 thou�. There is a fair amount of 'Kentucky Windage' in this due to: * Height of the component and the down-stream spacing. * Chip wave capabilities.
Electronics Forum | Thu Aug 29 20:34:02 EDT 2002 | ppwlee
A gap of 150-200� between potential shadow components is enough to eliminate those problems. Dave, Can you clarify? Do you mean 0.015 to 0.02?? Peter
Electronics Forum | Thu Aug 29 20:01:23 EDT 2002 | davef
Many people use the same spacing [and pad designs] as they use for primary side SMT. We don�t. DOWN STREAM SMT-TO-SMT SPACING: In addition to proper orientation, components cannot be immediately upstream of terminations that are to be soldered or b
Electronics Forum | Thu Aug 08 16:13:21 EDT 2013 | rangarajd
Hello All, Are there any documents that list component spacing requirements in terms of DFM/ DFA. I was going through IPC website but wasn't able to find any. Thanks!
Electronics Forum | Fri Aug 09 05:21:07 EDT 2013 | martinouk
This will usually be driven by the accuracy of your pick and place and common sense.
Electronics Forum | Tue Feb 27 20:53:10 EST 2007 | davef
We'll guarantee the two pads are too close together. The proper spacing depends on the orientation of the parts to the wave. * Do the pads hit the wave at the same time? * Does one pad hit the wave before the other? If so, which? * How does the 06
