Patent ID: 11933489
Assignee: STANLEY ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G  H | IPC F  H

Claim 8:
9. A method of fabricating an optical device having a metal reflective layer substantially made of a metal material, a first light transmissive layer disposed on the metal reflective layer, an optical multilayer reflective film disposed on the first light transmissive layer and comprising a plurality of sublayers stacked on each other and having different refractive indexes, and a wavelength converting layer disposed on the optical multilayer reflective film and including a fluorescent material capable of absorbing incident excitation light and generating fluorescent light having a lower energy, the wavelength converting layer being capable of generating mixed light including the excitation light and the fluorescent light in response to irradiation with the excitation light, wherein the optical device is configured such that part of the fluorescent light generated by the fluorescent material included in the wavelength converting layer is incident to the optical multilayer reflective film and the metal reflective layer and reflected by the optical multilayer reflective film and the metal reflective layer, thereby being emitted through a surface of the wavelength converting layer to outside, the method comprising:
providing the metal reflective layer on a rear surface of the first light transmissive layer;
providing the optical multilayer reflective film on a front surface of the first light transmissive layer; and
bonding the wavelength converting layer to an upper surface of the optical multilayer reflective film via an optically transparent adhesive layer,
wherein the bonding the wavelength converting layer to the upper surface of the optical multilayer reflective film comprises:
providing a first coupling layer on the upper surface of the optical multilayer reflective film;
providing a second coupling layer on a lower surface of the wavelength converting layer;
flattening a lower surface of the second coupling layer; and
bonding an upper surface of the first coupling layer and the lower surface of the second coupling layer by surface activation, thereby integrating the first coupling layer and the second coupling layer to yield a second light transmissive layer, and
wherein the second light transmissive layer has a refractive index lower than a refractive index of the wavelength converting layer.