The conductive foil and plating surrounding a hole.
The conductive material surrounding a hole.
That portion of conductive material completely surrounding a hole.
A circumferential crimp or indentation around the primer. In some military rounds, a dye was used in this ring for waterproofing and often to identify some characteristic of the cartridge.
The portion on conductive material (metal), that completely surrounds the hole.
The annular ring, sometimes also called annulus, is a diameter of copper that needs to be placed arround metalized holes like pads and vias. The minimum size of the annular ring is specified by the pcb-fab. A common requirements is 16 mil larger than the hole.
The width of the copper pad area that remains after a hole is drilled through a pad.
The width of the conductor pad surrounding a drilled hole.
The copper ring around the hole in a printed wiring board.
The portion of PWB conductor material (with through-hole designs, usually a pad) that completely surrounds a hole.