US 12,396,299 B2
Light-emitting diode and manufacturing method thereof
Yuan-Hui Fu, Miaoli County (TW); Yi-Hung Chen, Miaoli County (TW); and Tai-Hsiang Hu, Miaoli County (TW)
Assigned to Tyntek Corporation, Miaoli County (TW)
Filed by TYNTEK CORPORATION, Miaoli County (TW)
Filed on Jan. 19, 2023, as Appl. No. 18/156,973.
Claims priority of application No. 111122043 (TW), filed on Jun. 14, 2022.
Prior Publication US 2023/0411564 A1, Dec. 21, 2023
Int. Cl. H10H 20/841 (2025.01); H10H 20/01 (2025.01); H10H 20/821 (2025.01); H10H 20/824 (2025.01); H10H 20/831 (2025.01); H10H 20/84 (2025.01); H10H 20/857 (2025.01)
CPC H10H 20/841 (2025.01) [H10H 20/0133 (2025.01); H10H 20/824 (2025.01); H10H 20/8312 (2025.01); H10H 20/857 (2025.01); H10H 20/032 (2025.01); H10H 20/034 (2025.01)] 15 Claims
OG exemplary drawing
 
1. A light-emitting diode (LED), comprising:
a substrate, which comprises a top surface and a bottom surface, the top surface and the bottom surface being opposite to each other;
a light-tight reflective layer, which is formed on the top surface of the substrate;
an epitaxial layer, which comprises an inner epitaxial layer and an outer epitaxial layer,
wherein the inner epitaxial layer is formed on a poring of the top surface of the light-tight reflective layer, and
the outer epitaxial layer is formed on a portion of the top surface of the light-tight reflective layer and surrounds the inner epitaxial layer, the inner epitaxial layer and the outer epitaxial layer being not in contact with each other, a separation space being located between the inner epitaxial layer and the outer epitaxial layer, wherein, in a view made from a top side of the LED, the separation space forms a closed path, and in a cross-section perpendicular to the closed path, an outside wall of the inner epitaxial layer, an inside wall of the outer epitaxial layer, and a portion of the top surface of the light-tight reflective layer jointly define an inverted trapezoid cross-section, and two sides of the inverted trapezoid cross-section are respectively formed of the outside wall of the inner epitaxial layer and the inside wall of the outer epitaxial layer, and a base of the inverted trapezoid cross-section is formed of the portion of the top surface of the light-tight reflective layer, an included angle between the outside wall of the inner epitaxial layer and a normal line of the top surface of the light-tight reflective layer being from 2 to 30 degrees, an included angle between the inside wall of the outer epitaxial layer and a normal line of the top surface of the light-tight reflective layer being from 2 to 30 degrees;
a non-conducting layer, which covers a top surface and the outside wall of the inner epitaxial layer and a top surface and the inside wall of the outer epitaxial layer, and covers a portion of the top surface of the light-tight reflective layer between the inner epitaxial layer and the outer epitaxial layer, the non-conducting layer comprising a light-transmitting material;
an ohmic metallic body, which is disposed in the non-conducting layer, the ohmic metallic body being in electrical connection with the inner epitaxial layer;
a first electrode, which is in electrical connection with the ohmic metallic body, the first electrode comprising a light-reflecting material, a light exit hole in a circular form being formed in the first electrode, the light exit hole being located in a top side of the LED, wherein, in a view made from a top side of the LED, the separation space forms a closed path and surrounds the light exit hole; and
a second electrode, which is in electrical connection with the inner epitaxial layer.