Patent ID: 11904553
Assignee: LG CHEM, LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A method for producing a joined body comprising different materials joined together, the method comprising the steps of:
preparing a metal substrate comprising two or more etched grooves on a surface thereof and burrs provided adjacent to each of the two or more etched grooves;
sequentially placing a first resin layer and a second resin layer on the surface of the metal substrate; and
irradiating a surface of the second resin layer with a laser, thereby fusing the first and second resin layers to form a laminate,
wherein the first resin layer has a light transmittance of 20% to 70% at any one wavelength selected from a range of 800 nm to 1,100 nm,
wherein the second resin layer has a light transmittance of 50% to 80% at the any one wavelength,
wherein the surface of the metal substrate has a light reflectance of 50% or less at the any one wavelength,
wherein a light absorption rate of the first resin layer at the any one wavelength selected from a range of 800 nm to 1,100 nm is 20% to 50%, and
wherein the light transmittance of the first resin layer at the any one wavelength is lower than a light transmittance of the second resin layer at the any one wavelength.