Flow path unit, method of manufacturing flow path unit, and liquid ejecting apparatus

A liquid ejecting apparatus comprising:

• a head that ejects a liquid;
• and
• a flow path unit that constitutes a flow path through which a liquid supplied to the head flows, wherein
• the flow path unit has
• a flow path base material absorbent to laser light, and
• a flow path member that is transparent to laser light and is welded to the flow path base material,
• the flow path base material has a first surface and a second surface that is a surface opposite to the first surface,
• a welding region to be welded to the flow path member is formed at the first surface,
• a relay flow path that is a portion of the flow path is defined by welding the flow path member to the welding region,
• the flow path member has
• a welding surface welded to the welding region,
• an opposite surface that is a surface opposite to the welding surface, and
• a coupling pipe that extends from the opposite surface,
• a coupling flow path that is a portion of the flow path opens in the coupling pipe, and
• the coupling flow path communicates with the relay flow path.

A method of manufacturing a flow path unit including a flow path base material and a flow path member, the flow path base material being absorbent to laser light and having a first surface and a second surface that is a surface opposite to the first surface,

• the flow path member being transparent to laser light and having a welding surface, an opposite surface opposite to the welding surface, and a coupling pipe that extends from the opposite surface and has a coupling flow path opened, the method comprising:
• bringing the welding surface into contact with the first surface;
• and
• welding the flow path member to the flow path base material such that a relay flow path communicating with the coupling flow path is defined by irradiating a welding region, which is a region in contact with the welding surface on the first surface, with laser light.