Coplanar thin film printhead
AssigneeXerox Corporation
InventorsPeter Philebrown, Igor Kubelik
Life of this patent
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Abstract
A method and apparatus relating to a unique printhead configuration is disclosed. The printhead configuration is based on a coplanar arrangement of two sets of electrodes. The electrodes are electrically separated from each other by a dielectric layer, and together create a matrix of charge generating sites. Such a printhead has a very low internal capacitance and therefore is suitable for high speed and high resolution printing.
Claims18
In an image forming system, a printhead comprising:
- a first plurality of electrodes arranged in a substantially common plane;
- a second plurality of electrodes arranged to be substantially coplanar with said first plurality of electrodes;
- and
- a dielectric composition disposed at least between at least a portion of said first plurality of electrodes and said second plurality of electrodes;
- wherein one of said first plurality of electrodes and said second plurality of electrodes comprises RF-electrodes.
In an image forming system, a printhead comprising:
- a first plurality of electrodes arranged in a substantially common plane,
- a second plurality of electrodes arranged to be substantially coplanar with said first plurality of electrodes;
- and
- a dielectric composition disposed at least between at least a portion of said first plurality of electrodes and said second plurality of electrodes,
- wherein said first plurality of electrodes comprises an elongate section having electrodes extending generally in the shape of peninsulas and said second plurality of electrodes comprises individual electrodes substantially surrounding each of said extending electrodes.
In an image forming system, a printhead comprising:
- a first plurality of electrodes arranged in a substantially-common plane;
- a second plurality of electrodes arranged to be substantially coplanar with said first plurality of electrodes;
- and
- a dielectric composition disposed at least between at least a portion of said first plurality of electrodes and said second plurality of electrodes, said dielectric composition including a single dielectric layer disposed over said electrodes for sealing said first plurality and said second plurality of electrodes.
In an image forming system a printhead comprising:
- a first plurality of electrodes arranged in a substantially common plane;
- a second plurality of electrodes arranged to be substantially coplanar with said first plurality of electrodes;
- and
- a dielectric composition disposed at least between at least a portion of said first plurality of electrodes and said second plurality of electrodes, wherein said dielectric composition includes one or more dielectric layers, each layer being formed of a different dielectric material.
A method of forming an electron beam imaging printhead, the method comprising:
- forming a first plurality of electrodes and a plurality of RF electrodes in a substantially common plane;
- and
- applying a dielectric composition between said first plurality of electrodes and said plurality of RF electrodes.
A method of forming a printhead, comprising:
- coating a substrate with a metal suitable for forming electrodes;
- forming two distinct sets of electrodes in said coated substrate in the same plane;
- and
- covering said two sets of electrodes with a dielectric composition.
In an image forming system, a printhead comprising:
- a first plurality of electrodes arranged in a substantially common plane;
- a second plurality of electrodes substantially coplanar with said first plurality of electrodes;
- and
- a dielectric composition covering said first plurality of electrodes and said second plurality of electrodes, such that said dielectric composition seals gaps existing between said first plurality of electrodes and said second plurality of electrodes.
Dependencies are inferred from the claim text.