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US 6,672,712 B1Granted
Slotted substrates and methods and systems for forming same
AssigneeHewlett-Packard Development Company, L.P.
InventorsJeremy Donaldson, Eric L. Nikkel, Jeffrey S. Obert, Jeffrey R. Pollard, Jeff Hess
Life of this patent
Estimating the term…
Abstract
Methods and systems for forming compound slots in a substrate are described. In one exemplary implementation, a method forms a plurality of slots in a substrate. The method also etches a trench in the substrate contiguous with the plurality of slots to form a compound slot.
Claims27
A print head substrate comprising:
- a substrate having a thickness defined by a first surface and a generally opposing second surface;
- a trench received in the first surface and extending through less than an entirety of the thickness of the substrate, the trench being defined at least in part by two sidewalls;
- and,
- a plurality of slots extending into the substrate from the second surface and connecting with the trench to form a compound slot through the substrate, wherein at least portions of individual sidewalls of the trench are positioned at an angle of greater than about 10 degrees and less than about 90 degrees relative to the first surface.
1 more element
A print head substrate comprising:
- a substrate having a thickness defined by opposing first and second surfaces;
- a trench having a long axis and received in the first surface and extending through less than an entirety of the thickness of the substrate, wherein said trench can be defined, at least in part, by at least a portion of a v-shape when viewed in cross-section taken transverse the long axis;
- and,
- a plurality of slots extending into the substrate from the second surface and connecting with the trench to form a compound slot through the substrate.
1 more element
A print head substrate comprising:
- a substrate having a thickness defined by opposing first and second surfaces;
- a trench received in the first surface and extending through less than an entirety of the thickness of the substrate;
- and,
- a plurality of slots extending into the substrate from the second surface and connecting with the trench to form a compound slot through the substrate, wherein the trench is deeper at portions proximate to said slots than at portions more distant to said slots.
1 more element
A slotted print head substrate comprising:
- a substrate having a thickness defined by opposing first and second surfaces;
- a compound slot comprising an elongate trench portion that extends along a long axis, and at least one reinforcement structure within the compound slot, the reinforcement structure having a terminus proximate the first surface;
- and, the terminus comprising at least two differently angles walls.
Dependencies are inferred from the claim text.