Electronics Forum | Wed May 29 22:00:19 EDT 2002 | davef
Not sure of the package style or the specific problem you're talking about, but consider searching the fine SMTnet Archives since we have talked about this previously, several times.
Electronics Forum | Tue Jun 04 18:03:25 EDT 2002 | arzu
I recognize this problem as well, building only prototypes with all attention possible, the (small) networks need extra attention for they show opens. Maybe it helps to increase the placementforce a bit to increase the contact area to the paste befor
Electronics Forum | Thu Mar 27 11:49:18 EST 2003 | kenlchin
In printing,the thickness of solder paste perpendicular to the Squegge direction is always lower 1 mil than that parallel to the Squegge direction,so Insufficient Solder may occur.I think you may slow printing speed or widen appertures to resolve it.
Electronics Forum | Fri Jul 15 14:16:09 EDT 2005 | seaK
We have this problem for a long time. It happens to 3 new Mydata MY-9 machine. When pick and place resistor array 0408 (different value, top and bottom side), the solder paste in the middle two terminals missing occasionally. Thought it's because noz
Electronics Forum | Mon Jan 18 10:49:22 EST 2010 | pcbrookie
Hello all, One of our resistor arrays is becoming detached from its balls after reflow. This is the second instance of this happening. The balls are clearly soldered to the board, but the actual package is coming off (package pads are quite bare).
Electronics Forum | Thu May 30 11:37:27 EDT 2002 | Ron Costa
Hi Ray, A couple of things to look into: 1.date code of reel 2. what is the termination made up of tin/lead or tin/lead/palladium. Check with part manufacturer. 3.paste volume/aperture openings 4.PCB plating 5.solder paste formulation Good luck R
Electronics Forum | Wed Mar 26 19:11:52 EST 2003 | russ
Tell us more about your printer. squegge blade type ,speed, snap-off distance etc... You shouldn't have to change apertures for any component based upon its rotation. the parts that are coming out good could they withstand a higher volume print? You
Electronics Forum | Tue Apr 11 20:31:54 EDT 2000 | Dave F
Russ: You�re correct. I should have explained our reasons for preferring concave over convex better. First, we use both also ... we just prefer concave because they: * Don�t bridge any where near as easily. * Self-center better. * Seem to have mor
Electronics Forum | Mon Jun 07 22:30:28 EDT 1999 | Dave F
| | | I was wondering what measurements are used to define pitch? | | | | | Frank: John's correct with the most common definition, but there can be others, depending on your perspective. TTYL Dave F | | | | Pitch. The center-to-center spacing b
Electronics Forum | Thu Jul 20 15:37:53 EDT 2000 | Tekguy2000
These parts are flat chip resistor arrays that have 4 end terminations on each side. It looks liek an IC but is typically in an 0805 and 1206 package type with convex terminations. .031" pitch from termination to termination and .011" spacing between
