PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_copper-on-one-side-of-through-hole_topic1972.xml
. It requires two slotted through holes with no copper on the top side and copper pads on the bottom layer. I have created this pattern several times in FP Designer and it looks good until I try to reload the part either by reloading the FPX or switching to a different part and coming back
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/copper-on-one-side-of-through-hole_topic1972_post8148.html
. It requires two slotted through holes with no copper on the top side and copper pads on the bottom layer. I have created this pattern several times in FP Designer and it looks good until I try to reload the part either by reloading the FPX or switching to a different part and coming back
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/copper-on-one-side-of-through-hole_topic1972.html
. It requires two slotted through holes with no copper on the top side and copper pads on the bottom layer. I have created this pattern several times in FP Designer and it looks good until I try to reload the part either by reloading the FPX or switching to a different part and coming back
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic1972&OB=ASC.html
. It requires two slotted through holes with no copper on the top side and copper pads on the bottom layer. I have created this pattern several times in FP Designer and it looks good until I try to reload the part either by reloading the FPX or switching to a different part and coming back
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_pcb-design-in-the-1970s_topic2333.xml
. The primary goal of solder mask back in the 70’s was toprotect the bare copper traces from oxidation and the acronym SMOBC wascreated
Imagineering, Inc. | https://www.pcbnet.com/blog/understanding-the-pcb-fabrication-process-from-design-to-delivery/
. This plating also covers the copper layer, protecting it from oxidation. Many finishing materials currently exist, each with its own set of trade-offs
Imagineering, Inc. | https://www.pcbnet.com/blog/what-is-the-pcb-fabrication-process/
. This gives printed circuit board its distinctive green color, although other options are available. A solder mask is a thin layer of polymer that protects the copper traces that have been printed onto the board from oxidation
Imagineering, Inc. | https://www.pcbnet.com/blog/how-pcbs-are-made/
: Copper is used to create conductive pathways on the PCB. Solder Mask: This is a protective layer, typically made of epoxy resin. It’s applied to certain board areas to protect them from the soldering process. Silkscreen
| http://etasmt.com/cc?ID=te_news_industry,4161&url=_print
Lead-free era makes whether need nitrogen in reflow a hot topic . As the lead-free solder flow resistance, wettability is not as good as lead solder, especially when the circuit board pad processed with OSP (organic protective film bare copper), the pad
| http://etasmt.com/cc?ID=te_news_industry,24165&url=_print
(organic protective film bare copper), the pad is easily oxidized, often caused problems that solder wetting angle is too largely exposed and copper pad phenomenon
