Liquid jet recording head having a substrate with minimized electrode overlap
AssigneeCanon Kabushiki Kaisha
InventorsAsao Saito, Ryoichi Koizumi, Tsutomu Kato
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Abstract
A substrate for use with a liquid jet recording head has a semiconductor substrate, functional elements formed on said semiconductor substrate, and electro-thermal transducers electrically connected to the functional elements for generating thermal energy to be utilized to discharge liquid. The substrate comprises a common electrode electrically connected to the functional elements in common. The common electrode has a notch at a position facing control electrodes formed between adjacent functional elements. The notch minimizes the overlap of the common electrode and the control electrodes to decrease the probability of an electrical defect.
Claims48
A substrate for use with a liquid jet recording head comprising:
- a semiconductor substrate;
- functional elements formed on said semiconductor substrate;
- control electrodes formed between adjacent functional elements;
- and
- electro-thermal transducers electrically connected to said functional elements for generating thermal energy to be utilized to discharge liquid,
- said substrate comprising a common electrode electrically connected to said functional elements in common, said common electrode having a notch at a position facing said control electrodes.
A liquid jet recording head comprising:
- discharge ports for discharging liquid;
- electro-thermal transducers provided for said discharge ports for generating thermal energy to be used to discharge the liquid;
- a semiconductor substrate;
- functional elements electrically connected to said electro-thermal transducers and formed on said semiconductor substrate;
- a common electrode electrically connected to said functional elements;
- and
- control electrodes formed between adjacent functional elements, said common electrode having a notch at a position facing said control electrodes.
In a recorder having a liquid tank for storing liquid therein to be supplied to said liquid jet recording head, and a platen along which a record medium is guided for receiving the liquid discharged from said liquid jet recording head, a liquid jet recording head comprising:
- discharge ports for discharging liquid;
- electro-thermal transducers provided for said discharge ports for generating thermal energy to be utilized to discharge the liquid;
- a semiconductor substrate;
- functional elements electrically connected to said electro-thermal transducers and formed on said semiconductor substrate;
- a common electrode electrically connected to said functional elements;
- and
- control electrodes formed between adjacent functional elements,
- said common electrode having a notch at a position facing said control electrodes.
A liquid jet recording head having discharge ports for discharging liquid, a liquid path connected to said discharge ports and electrothermal transducers provided for each of said discharge ports, said recording head comprising:
- functional elements formed on the same substrate as that of said electro-thermal transducers, said functional elements independently driving said electro-thermal transducers;
- a supply electrode pattern arranged on said substrate with the intervention of said functional elements for supplying a drive current to said elector-thermal transducer;
- a control electrode pattern for controlling the supply of the drive current in said functional elements isolating the operation of said functional elements from other operations;
- said supply electrode pattern and said control electrode pattern being designed such that a crossing area of said supply electrode pattern and said control electrode pattern is minimized.
A substrate for a liquid jet recording head having electrothermal transducers formed thereon for generating discharge energy to discharge liquid, said substrate comprising:
- functional elements formed on said substrate for independently driving said electro-thermal transducers;
- a supply electrode pattern arranged on said substrate with the intervention of said functional elements for supplying a drive current to said elector-thermal transducer;
- a control electrode pattern for controlling the supply of said drive current in said functional elements or isolating the operation of said functional elements from other operations;
- said supply electrode pattern and said control electrode pattern being designed such that a crossing area of said supply electrode pattern and said control electrode pattern is minimized.
A substrate for use with a liquid jet recording head comprising:
- functional elements formed on said substrate;
- electrodes formed between adjacent functional elements;
- electro-thermal transducers electrically connected to said functional elements for generating thermal energy to be utilized to discharge liquid;
- and
- a common electrode formed on said substrate and electrically connected to said functional elements in common, said common electrode having a notch at a position facing said electrodes.
A liquid jet recording head comprising:
- discharge ports for discharging liquid;
- electro-thermal transducers provided for said discharge ports for generating thermal energy to be utilized to discharge the liquid;
- a substrate;
- functional elements electrically connected to said electro-thermal transducers and formed on said substrate;
- electrodes formed between adjacent functional elements;
- and
- a common electrode formed on said substrate and electrically connected to said functional elements in common, said common electrode having a notch at a position facing said electrodes.
In a liquid jet recording apparatus having a liquid tank for storing liquid therein to be supplied to said liquid jet recording head, and a platen along which a record medium is guided for receiving the liquid discharged from said liquid jet recording head, a liquid jet recording head comprising:
- discharge ports for discharging liquid;
- electro-thermal transducers provided for said discharge ports for generating thermal energy to be utilized to discharge the liquid;
- a substrate;
- functional elements electrically connected to said electro-thermal transducers and formed on said substrate;
- electrodes formed between adjacent functional elements;
- and
- a common electrode formed on said substrate and electrically connected to said functional elements in common, said common electrode having a notch at a position facing said electrodes.
A substrate for use in a recording unit, the substrate comprising:
- functional elements;
- a first electrode formed between said functional elements;
- and
- a second electrode formed above said first electrode;
- wherein said second electrode has a notch at a position facing said first electrode and said first and said second electrodes are electrically connected to at least one of said functional elements.
Dependencies are inferred from the claim text.