18229799. LIQUID EJECTION HEAD INSPECTION METHOD, LIQUID EJECTION HEAD INSPECTION APPARATUS, AND EJECTION ELEMENT SUBSTRATE simplified abstract (CANON KABUSHIKI KAISHA)

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LIQUID EJECTION HEAD INSPECTION METHOD, LIQUID EJECTION HEAD INSPECTION APPARATUS, AND EJECTION ELEMENT SUBSTRATE

Organization Name

CANON KABUSHIKI KAISHA

Inventor(s)

SATORU Takahashi of Kanagawa (JP)

JUNICHIRO Iri of Kanagawa (JP)

LIQUID EJECTION HEAD INSPECTION METHOD, LIQUID EJECTION HEAD INSPECTION APPARATUS, AND EJECTION ELEMENT SUBSTRATE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18229799 titled 'LIQUID EJECTION HEAD INSPECTION METHOD, LIQUID EJECTION HEAD INSPECTION APPARATUS, AND EJECTION ELEMENT SUBSTRATE

Simplified Explanation

The patent application describes a technique for inspecting the energy used for liquid ejection without making any changes to the electric wiring on the substrate of a liquid ejection head. The liquid ejection head includes a substrate, an electrothermal converter for heat generation, a protective film covering the converter, and an organic layer covering both the converter and the protective film.

The technique involves acquiring the electrical resistance value of the electrothermal converter as a first measurement result, and acquiring the film thickness of a portion of the substrate where the protective film is exposed as a second measurement result. Based on these measurement results, information on the ejection energy required to eject liquid from the ejection port is obtained.

  • The technique allows for the inspection of liquid ejection energy without modifying the electric wiring on the liquid ejection head.
  • The liquid ejection head includes a substrate, an electrothermal converter, a protective film, and an organic layer.
  • The electrical resistance value of the electrothermal converter is measured as a first measurement result.
  • The film thickness of the exposed portion of the substrate is measured as a second measurement result.
  • The ejection energy required to eject liquid from the ejection port is determined based on the first and second measurement results.

Potential Applications:

  • This technique can be used in the manufacturing process of liquid ejection heads to ensure the proper functioning of the ejection element substrate.
  • It can be applied in industries that utilize liquid ejection technology, such as printing, 3D printing, and inkjet technology.

Problems Solved:

  • The technique allows for the inspection of liquid ejection energy without the need to modify the electric wiring, reducing the complexity and cost of the inspection process.
  • It provides a non-invasive method to assess the functionality of the ejection element substrate and ensure the quality of liquid ejection.

Benefits:

  • Simplifies the inspection process for liquid ejection heads, saving time and resources.
  • Enables accurate determination of the ejection energy required for liquid ejection, ensuring optimal performance.
  • Facilitates quality control in the manufacturing of liquid ejection heads, leading to improved product reliability.


Original Abstract Submitted

Provided is a technique which can inspect liquid ejection energy without changing electric wiring on an ejection element substrate of a liquid ejection head or ejecting liquid from the liquid ejection head. A liquid ejection head as an ejection-energy inspection target includes an ejection element substrate having a substrate, a heat generation portion having an electrothermal converter on the substrate, a protective film covering the electrothermal converter, and an organic layer covering the electrothermal converter and the protective film. For this liquid ejection head, an electrical resistance value of the electrothermal converter is acquired as a first measurement result, and the film thickness of a film thickness measurement portion of the ejection element substrate where the protective film is exposed is acquired as a second measurement result. Further, information on ejection energy needed to eject liquid from the ejection port is obtained based on the first and second measurement results.

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