| 摘要 |
An improved integral ink filter for an ink jet printhead has decreased flow resistance and minimal machine cost to implement. The integral ink filter includes both a first filter array patterned in a silicon channel plate of the printhead and a second filter array patterned in an insulative layer located between the channel plate and a heater plate. As the insulative layer already requires photolithographic patterning, such as to remove portions over heating elements and between an ink manifold and nozzle channels, there are no additional processing steps necessary. As such, the present invention achieves improved filtration by doubling the filtration rate, while retaining a small pore size corresponding to a channel size of the nozzles. Thus, a desired ink flow to the nozzles can be maintained even if the ink channels are made increasingly smaller.
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