PATTERNED COMPOSITE SUBSTRATE AND LIGHT-EMITTING ELEMENT

• Main Authors: WANG, Lehao, FU, Xingxing, SUN, Shuai, CHENG, Chih-Ching, LIU, Peng, SONG, Changwei, LU, Ling
• Format: Patent
• Language: Chinese; English; French
• Published: 09.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The present invention relates to the technical field of semiconductors, and in particular to a patterned composite substrate and a light-emitting element. The patterned composite substrate comprises a substrate body and a periodic composite structure protruding out of the upper surface of the substrate body, the composite structure comprises quasi polygonal frustums and quasi polygonal pyramids which are disposed in a stacked manner, and the duty cycle F of the composite structure satisfies 0.80<F≤0.985. According to the patterned composite substrate of the present invention, by means of patterning settings, the duty cycle of patterns is increased, especially the lateral area of the quasi polygonal pyramid portions is greatly increased, so that the reflective area of light inside an LED can be remarkably increased, and the light exit efficiency and the like of an LED device is further improved; moreover, both the guarantee of manufacturability and the reduction of spacing region are taken into account, a bett