US Patent 7501070 Slotted substrate and method of making

The described embodiments relate to a slotted substrate for use in a fluid ejecting device. One exemplary embodiment includes a substrate having a thickness between generally opposing first and second surfaces. A slot received in the substrate. The slot has a central region joined with at least one terminal region. The central region extends between the first and second surfaces. The at least one terminal region includes, at least in part, a bowl-shaped portion that has a diameter at the first surface greater than a width of the central region at the first surface.