18883216. SUBSTRATE AND LIGHT EMITTING DEVICE (NICHIA CORPORATION)
SUBSTRATE AND LIGHT EMITTING DEVICE
Organization Name
Inventor(s)
Norifumi Sasaoka of Tokushima-shi JP
Daisuke Iwakura of Komatsushima-shi JP
Yoshiyuki Kageyama of Tokushima-shi JP
SUBSTRATE AND LIGHT EMITTING DEVICE
This abstract first appeared for US patent application 18883216 titled 'SUBSTRATE AND LIGHT EMITTING DEVICE
Original Abstract Submitted
A substrate includes a first member having a through hole extending from an upper surface to a lower surface thereof, and a second member disposed inside the through hole. The second member includes a first region containing graphite, a second region located outward of the first region in a top view, containing graphite and a thermally conductive material that contains at least one of a metal or a ceramic, and having a volume fraction of the graphite lower than a volume fraction of the graphite in the first region, and a third region located outward of the second region in the top view, containing a thermally conductive material that contains at least one of a metal or a ceramic, and having a volume fraction of the thermally conductive material higher than a volume fraction of the thermally conductive material in the second region.