Joint structure and method of manufacturing joint structure

A joint structure comprising a light-absorbable member having at least one opening portion and a light-permeable member superposed on the light-absorbable member so as to cover the opening portion,

• wherein an annular weld part is formed so as to enclose the opening portion and join the light-absorbable member and the light-permeable member, and the light-permeable member is provided outside the annular weld part with a thinned piece adhering to the light-absorbable member by deforming at a depressurized state of an interior of the opening portion before the formation of the annular weld part.

A method of manufacturing a joint structure which comprises superposing a light-permeable member onto a light-absorbable member having at least one opening portion so as to cover the opening portion, irradiating a laser beam from the side of the light-permeable member to form an annular weld part so as to enclose the opening portion to thereby join the light-absorbable member and the light-permeable member,

• wherein the light-permeable member is deformed at a state of depressurizing an interior of the opening portion before the formation of the annular weld part to form a thin sheet adhering to the light-absorbable member, and the interior of the opening portion is depressurized in the formation of the annular weld part to deform the light-permeable member and the laser beam is irradiated from the side of the light-permeable member at a state of adhering to the light-absorbable member.

A method of manufacturing a joint structure which comprises superposing a light-permeable member onto a light-absorbable member having at least one opening portion so as to cover the opening portion, irradiating a laser beam from the side of the light-permeable member to form an annular weld part so as to enclose the opening portion to thereby join the light-absorbable member and the light-permeable member,

• wherein a thinned piece of the light-permeable member adhering to the light-absorbable member is formed outside the annular weld part by deforming at a state of depressurizing an interior of the opening portion before the formation of the annular weld part, and the interior of the opening portion is depressurized in the formation of the annular weld part to deform the thinned piece and the laser beam is irradiated from the side of the light-permeable member at a state of adhering to the light-absorbable member.