Patent ID: 8540349

Claim:
A liquid ejector comprising: a substrate including a first surface; a first dielectric layer disposed on the first surface; a second dielectric layer spanning the first dielectric layer; wherein the second dielectric layer abuts the first dielectric layer at an abutting portion and is spaced apart from the first dielectric layer at a cavity portion such that a cavity is formed between the first dielectric layer and the second dielectric layer at the cavity portion, wherein the cavity is laterally bounded on two sides by the second dielectric layer and is bounded by the first dielectric layer on a side, different from the two sides, so that the first dielectric layer is between the cavity and the substrate at the cavity portion; a heating element disposed on the second dielectric layer and includes a first edge along a length between electrical contacts; an insulating sealing material that seals the cavity at a plurality of portions that project beyond the first edge of the heating element; and a chamber including a nozzle located over the heating element, the chamber being shaped to receive a liquid, the cavity being isolated from the liquid.