Ink jet printhead with channels formed in silicon with a (110) surface orientation
First Claim
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1. An ink-jet printhead comprising:
- a substrate defining a main surface;
a single crystal silicon wafer bonded to the main surface of the substrate, the silicon wafer being oriented with a (110) plane parallel to the main surface of the substrate; and
a plurality of parallel channels defined in the silicon wafer, with a portion of the main surface of the substrate being exposed within each channel, wherein each parallel channel defines sidewalls in the silicon wafer which are perpendicular to the main surface of the substrate.
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Abstract
In an ink-jet printhead, the individual channels for ejecting ink onto a print medium are orientation dependently etched along the (111) planes perpendicular to the (110) surface orientation of a single crystal silicon wafer. The silicon wafer is bonded on a glass substrate to act as both a support and an etch stop in the etching process. The orientation of the channels within the silicon layer facilitates channels which are rectangular in cross section.
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Citations
11 Claims
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1. An ink-jet printhead comprising:
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a substrate defining a main surface; a single crystal silicon wafer bonded to the main surface of the substrate, the silicon wafer being oriented with a (110) plane parallel to the main surface of the substrate; and a plurality of parallel channels defined in the silicon wafer, with a portion of the main surface of the substrate being exposed within each channel, wherein each parallel channel defines sidewalls in the silicon wafer which are perpendicular to the main surface of the substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making an ink-jet printhead, comprising the steps of
providing a substrate defining a main surface; -
bonding a single crystal silicon wafer to the main surface of the substrate, the silicon wafer being oriented with a (110) plane parallel to the main surface of the substrate; and creating a plurality of parallel channels in the silicon wafer, with a portion of the main surface of the substrate being exposed within each channel. - View Dependent Claims (8, 9, 10, 11)
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Specification