Liquid discharge head, liquid discharge apparatus, and method for manufacturing liquid discharge head

A liquid discharge head comprising:

• a nozzle plate having multiple nozzle holes from each of which a liquid is dischargeable;
• a housing supporting the nozzle plate;
• a diffusion bonding member between the nozzle plate and the housing and bonded to each of the nozzle plate and the housing by a diffusion bonding,
• the diffusion bonding member including:
• multiple connecting portions arrayed in an array direction of the multiple nozzle holes, the multiple connecting portions contacting the nozzle plate and the housing to bond the nozzle plate and the housing;
• multiple channels in the multiple connecting portions and communicating with the multiple nozzle holes of the nozzle plate, respectively;
• a gap formed between one of the multiple connecting portions and another of the multiple connecting portions adjacent to the one of the multiple connecting portions;
• and
• a wall portion along an outer periphery portion of the nozzle plate, the wall portion contacting the nozzle plate and the housing to bond the nozzle plate and the housing, wherein
• the multiple connecting portions are connected to a part of the wall portion, and
• each of the connecting portions is contacting the wall portion.

A manufacturing method comprising:

• forming a wall portion on an outer peripheral portion of a nozzle plate or on an outer peripheral portion of a housing;
• forming multiple connecting portions on one of the nozzle plate having multiple nozzle holes or the housing, the multiple connecting portions arrayed in an array direction of the multiple nozzle holes, wherein the multiple connecting portions are connected to a part of the wall portion and each of the connecting portions is contacting the wall portion;
• forming a gap between one of the multiple connecting portions and another of the multiple connecting portions adjacent to one of the multiple connecting portions;
• forming multiple channels, communicating with the multiple nozzle holes of the nozzle plate, in the multiple connecting portions, respectively;
• bringing the multiple connecting portions into contact with the one of the nozzle plate or the housing to bond the nozzle plate and the housing;
• and
• performing a diffusion bonding between the nozzle plate and the housing via the multiple connecting portions.