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US 7,118,199 B2Granted
Liquid jet recording head
AssigneeCanon Kabushiki Kaisha
InventorToshihiro Mori
Life of this patent
Estimating the term…
Abstract
This invention is intended to connect a dummy lead while preventing depression of a resin that seals electric connection sections, without bringing the dummy lead into contact with a recording element substrate or without taking the dummy lead for a lead electrode. The dummy lead which is provided inward of an opening of a flexible film wiring substrate to be shorter than the lead electrode, and which is not electrically connected to an electrode pad is provided to be adjacent to the lead electrode.
Claims17
A liquid jet recording head comprising:
- a recording element substrate which includes a recoding liquid discharge port, and includes a discharge energy generation element that generates a discharge energy;
- a flexible film wiring substrate which includes an opening for exposing the recording element substrate to an outside, and includes a plurality of lead electrodes projecting inward of the opening, the flexible film wiring substrate connected to the recording element substrate so as to apply an electrical signal to the discharge energy generation element;
- a plurality of electrode pads provided on the recording element substrate, the electrode pads electrically connected to the lead electrodes, respectively so as to electrically connect the recording element substrate to the flexible film wiring substrate;
- a dummy lead which is provided inward of the opening to protrude to be shorter than each of the lead electrodes, and which is not electrically connected to each of the electrode pad, the dummy lead provided to be adjacent to at least one lead electrode group comprising of a plurality of lead electrodes among the plurality of lead electrodes;
- and
- wherein a plurality of the recording element substrates are provided in the opening, and the dummy lead is provided correspondingly between end portions of the plurality of recording element substrates adjacent to each other.
3 more elements
A liquid jet recording head comprising:
- a recording element substrate which includes a recoding liquid discharge port, and includes a discharge energy generation element that generates a discharge energy;
- a flexible film wiring substrate which includes an opening for exposing the recording element substrate to an outside, and includes a plurality of lead electrodes projecting inward of the opening, the flexible film wiring substrate connected to the recording element substrate so as to apply an electrical signal to the discharge energy generation element;
- a plurality of electrode pads provided on the recording element substrate, the electrode pads electrically connected to the lead electrodes, respectively so as to electrically connect the recording element substrate to the flexible film wiring substrate;
- a dummy lead which is provided inward of the opening to protrude to be shorter than each of the lead electrodes, and which is not electrically connected to each of the electrode pad, the dummy lead provided to be adjacent to at least one lead electrode group comprising of a plurality of lead electrodes among the plurality of lead electrodes;
- wherein a plurality of the recording element substrates are provided in the opening, and the dummy lead is provided near end portions of the plurality of recording element substrates adjacent to each other;
- and
- wherein a gap between each of the lead electrodes and the dummy lead is set to fall within a range of 0.75P≦P≦1.25P, where P is an arrangement pitch of the plurality of lead electrodes.
4 more elements
Dependencies are inferred from the claim text.