PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic619.html
), just a clean hole through the FR4 material. But why? The plated hole drill bit hits copper on every hole. JZsori wrote: My understanding is that it is preferable to have a donut pad for the screw head so that the screw does not crush the epoxy glass material as much as it has a copper pad in between
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic619&OB=ASC.html
), just a clean hole through the FR4 material. But why? The plated hole drill bit hits copper on every hole. JZsori wrote: My understanding is that it is preferable to have a donut pad for the screw head so that the screw does not crush the epoxy glass material as much as it has a copper pad in between
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_via-guidance-request-from-tim-c_topic538.xml
;If you do not mention the plug fill material in your fabrication notes, LPI solder mask is the default. But if you have high current you should probably request Dupont Silver Epoxy
| http://etasmt.com/cc?ID=te_news_industry,23962&url=_print
. Is the layout designed for the PIP process? If the PCB hole diameter is too big, it will require too much solder to fill it up. If it is too small, it is very difficult to fill the hole properly with paste during solder paste printing
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/minimum-trace-width-spacing-for-bga_topic1556.html
. If you want to cover both top and bottom holes I recommend that you fill the holes with something (over-plate, silver epoxy, solder mask
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/minimum-trace-width-spacing-for-bga_topic1556.html
. If you want to cover both top and bottom holes I recommend that you fill the holes with something (over-plate, silver epoxy, solder mask
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic1556&OB=DESC.html
. If you want to cover both top and bottom holes I recommend that you fill the holes with something (over-plate, silver epoxy, solder mask
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic1556&OB=ASC.html
. If you want to cover both top and bottom holes I recommend that you fill the holes with something (over-plate, silver epoxy, solder mask
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic1556&OB=ASC.html
. If you want to cover both top and bottom holes I recommend that you fill the holes with something (over-plate, silver epoxy, solder mask
