Electronics Forum | Tue Jan 04 07:22:12 EST 2000 | Michael Selva
One of the boards has a via designed right in the middle of a pad for a 1206 cap, one side only. This causes the solder paste to run into the via during reflow. We run No-Clean paste. One alternative is to increase the aperture on the stencil for tha
Electronics Forum | Mon Jan 10 19:13:46 EST 2000 | TNT
HELLO MIKE, THE PROBLEM WITH THE VIA BEING IN THE MIDDLE OF THE PAD CAN BE HANDLED. IF YOU ARE HAVING PROBLEMS WITH SOLDER FLOWING THROUGH AT REFLOW YOU MIGHT WANT TO CHECK YOUR VACUUM AT YOU SCREEN PRINTER. SOMETIMES THE VACUUM THAT HOLDS THE PCB
Electronics Forum | Wed Jan 05 09:44:45 EST 2000 | Millerin Claude
Some PCB's manufacturers are now able to fill the hole and then re-metallized the pattern in order to obtain a final soldering surface perfectly flat but with an electrical connection under. This of course increase the price of the pcb but avoid any
Electronics Forum | Tue Jan 11 13:39:11 EST 2000 | David
Is this a thru hole via or a blind via? What is the hole diameter? If blind, how deep is it?
Electronics Forum | Wed Jan 05 12:48:44 EST 2000 | Dave F
Millerin: You are generally correct about plugging and over plating vias, but in Michaels case, the via is blind. Plugging would trap air between the bottom of the via and the plug material, causing an air pocket. When heated to soldering temperat
Electronics Forum | Mon Jan 10 10:02:57 EST 2000 | Istv�n Dominik
We had the same problems. Certainly the best solution to redesign the boards. Otherwise the holes must be plugged. We tried many solutions (more paste, printing twice etc.) but the result was almost the same. Finally we printed solderpaste only on th
Electronics Forum | Tue Jan 04 08:40:24 EST 2000 | g cronin
don't you just love those design guys sometimes, this is an issue that pops up every once in a while with us too. We have a couple assemblies that have hundreds of vias on pads. We have tried and had some sucess with: increasing squeegee pressure,
Electronics Forum | Sun Feb 17 23:21:29 EST 2002 | dwoon
In the terminology of X-ray, does anyone know the meaning of "middle height splice"? Regards, Daniel
Electronics Forum | Fri Dec 27 10:04:56 EST 2002 | haran
Big pad located at the middle of the package. On the PCB,we need to have solder paste printed on the thermal pad which is at the middle and the other pads of the perimeter BGA.
Electronics Forum | Wed Aug 19 13:52:11 EDT 2020 | goldendragon
Hello guys, Please help me how to parallel the width chain, it is bow out in the middle and keep dropped the board in oven, I can't find anything there that I can manually adjust the middle width to the same size with the entrance and exit. HELP!!! T
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