Head chip, liquid jet head, and liquid jet recording device

A head chip comprising:

• an ejection section having a plurality of jet channels which extends in a first direction, and which is arranged in a second direction crossing the first direction, and electrodes formed on inner surfaces of the jet channels;
• a jet hole plate which has a plurality of jet holes individually communicated with the plurality of jet channels, and which is arranged at a first side in the first direction of the ejection section;
• a return plate which has a plurality of communication channels configured to individually communicate the plurality of jet channels and the plurality of jet holes with each other, and which is arranged between the ejection section and the jet hole plate in the first direction;
• a flow channel plate which has a manifold communicated in a lump with the plurality of communication channels, and which is arranged at one side in a third direction crossing the second direction when viewed from the first direction with respect to the ejection section;
• and
• a protective film formed throughout the inner surfaces of the jet channels and inner surfaces of the communication channels, wherein
• the communication channels each include:
• an upstream opening communicated with a channel opening which opens toward the first side in the first direction in the jet channel,
• a downstream opening communicated with a manifold opening which opens toward the first side in the first direction in the manifold, and
• a connecting part which extends in the third direction, and which is configured to connect the upstream opening and the downstream opening to each other, and
• the return plate is bonded to the ejection section so that at least a part of an opening edge in the upstream opening is arranged at an outer side when viewed from the first direction with respect to an opening edge of the channel opening.