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US 2010/0149279 A1Published application
Inkjet nozzle assembly having heater element bonded to chamber wall via dielectric layer
AssigneeSilverbrook Research Pty Ltd
InventorsKia Silverbrook, Gregory John McAvoy, Angus John North, Samuel George Mallinson, Mehdi Azimi, Paul Justin Reichl
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Abstract
An inkjet nozzle assembly has a chamber with a nozzle opening for ejecting a liquid, a heater element disposed in the chamber, and a dielectric layer sandwiched between the heater element and a wall of the chamber. The dielectric layer has a thermal product of less than 1495 Jm−2K−1s−1/2. The thermal product is defined as (ρCk)1/2, where ρ is the density of the layer, C is specific heat of the layer and k is thermal conductivity of the layer.
Claims15
An inkjet nozzle assembly comprising:
- a chamber for containing an ejectable liquid, said chamber having a nozzle opening for ejection of said liquid;
- a heater element disposed in said chamber, said heater element having a first side and an opposite second side, said first side being positioned for directly contacting the ejectable liquid;
- and
- a dielectric layer sandwiched between the second side of said heater element and a wall of said chamber,
- wherein the dielectric layer has a thermal product of less than 1495 Jm−2K−1s−1/2, the thermal product being defined as (ρCk)1/2, where ρ is the density of the layer, C is specific heat of the layer and k is thermal conductivity of the layer.
2 more elements
Dependencies are inferred from the claim text.