| 摘要 |
一种发光元件包含：一半导体接触层包含一粗糙顶面，其包含两相邻的第一顶峰及一第一波谷，各第一顶峰包含一第一最高点，第一波谷包含一第一最低点，两个第一最高点与第一最低点连接形成两条第一斜线且之间有一第一角度；及一透明电流扩散层包含一顶面，其包含两相邻的第二顶峰以及一第二波谷，各第二顶峰包含一第二最高点，第二波谷包含一第二最低点，顶面的两个第二最高点与第二最低点连接形成两条第二斜线且之间有一第二角度；其中半导体接触层的粗糙顶面大致位于透明电流扩散层的顶面的正下方，第一角度与第二角度的差异不大于10度。; and a transparent current spreading layer comprising a top surface on the semiconductor contact layer and comprising any two second adjacent crests and a second trough, wherein the two second adjacent crests each comprises a second highest point respectively and the second trough comprises a second lowest point between the two second adjacent crests, and two second oblique lines are formed by connecting the second highest points and the second lowest point, and a second angle is formed between the two second oblique lines; wherein the rough top surface of the semiconductor contact layer is substantially directly under the top surface of the transparent current spreading layer and a difference between the first angle and the second angle is not greater than 10 degrees |
