Printed circuit board
AssigneeSamsung Electronics Co., Ltd.
InventorHyejin KIM
Life of this patent
Estimating the term…
Abstract
A printed circuit board that includes a core substrate including a core layer, an upper glass layer on a surface of the core layer, and a lower glass layer on another surface of the core layer; an optical waveguide including at least a portion between the upper glass layer and the lower glass layer, the optical waveguide including a reflection layer on at least a portion of an inner wall of the optical waveguide; a first pad on the core substrate, the first pad being connected to the optical waveguide; a second pad on the core substrate, the second pad being spaced apart from the first pad, and the second pad being connected to the optical waveguide; and a heat emission layer contacting at least a portion of each of the first pad and the second pad.
Claims20
A printed circuit board comprising:
- a core substrate comprising a core layer, an upper glass layer on a surface of the core layer, and a lower glass layer on another surface of the core layer;
- an optical waveguide including at least a portion between the upper glass layer and the lower glass layer, the optical waveguide comprising a reflection layer on at least a portion of an inner wall of the optical waveguide;
- a first pad on the core substrate, the first pad being connected to the optical waveguide;
- a second pad on the core substrate, the second pad spaced apart from the first pad, and the second pad being connected to the optical waveguide;
- and
- a heat emission layer contacting at least a portion of each of the first pad and the second pad.
A printed circuit board comprising:
- a core substrate comprising a core layer, an upper glass layer on a surface of the core layer, and a lower glass layer on another surface of the core layer, the core layer comprising a dielectric;
- an optical waveguide including at least a portion between the upper glass layer and the lower glass layer, the optical waveguide comprising a reflection layer on at least a portion of an inner wall of the optical waveguide;
- a first pad on the core substrate, the first pad being connected to the optical waveguide;
- a second pad on the core substrate, the second pad being spaced apart from the first pad, and the second pad being connected to the optical waveguide;
- and
- a heat emission layer contacting at least a portion of each of the first pad and the second pad,
- wherein the at least a portion of the inner wall of the optical waveguide has an average surface roughness less than or equal to 50 nanometers.
A printed circuit board comprising:
- a core substrate comprising a core layer, an upper glass layer on a surface of the core layer, and a lower glass layer on another surface of the core layer, the core layer comprising a dielectric;
- an optical waveguide including at least a portion between the upper glass layer and the lower glass layer, the optical waveguide comprising a reflection layer on at least a portion of an inner wall of the optical waveguide;
- a first pad on the core substrate, the first pad being connected to the optical waveguide;
- a second pad on the core substrate, the second pad being spaced apart from the first pad, and the second pad being connected to the optical waveguide;
- and
- a heat emission layer contacting at least a portion of each of the first pad and the second pad,
- wherein when viewed in a first direction perpendicular to an upper surface of the core substrate, the optical waveguide comprises
- a first area overlapping the first pad,
- a second area overlapping the second pad, and
- a third area connecting the first area and the second area, and
- wherein
- the first area and the second area are side by side and extend parallel to the first direction,
- the third area extends parallel to a second direction, the second direction is parallel to the surface of the core substrate and the second direction crosses the first direction,
- the at least a portion of the inner wall of the optical waveguide has an average surface roughness less than or equal to 50 nanometers,
- a total reflectance of the at least a portion of the inner wall of the optical waveguide for an ultraviolet ray is less than or equal to 10%,
- a specular reflectance of the at least a portion of the inner wall of the optical waveguide for the ultraviolet ray is less than or equal to 10%, and
- a diffuse reflectance of the at least a portion of the inner wall of the optical waveguide for the ultraviolet ray is less than or equal to 3%.
Dependencies are inferred from the claim text.