Patent ID: 8354683

Claim:
A semiconductor element, comprising: a first voltage-drop portion configured to provide a first voltage drop V 1 ; a second voltage-drop portion configured to provide a second voltage drop V 2 and electrically connected to the first voltage-drop portion; and a connecting material formed between the first voltage-drop portion and the second voltage-drop portion, and having a physical dimension smaller than the first voltage-drop portion, the second voltage-drop portion, or both; wherein the semiconductor element can work under a total bias voltage being greater than the second voltage drop V 2 , and the second voltage drop V 2 is equal to N times the first voltage drop V 1 , wherein N is any integer not smaller than 1, and wherein the first voltage-drop portion has a luminous efficiency greater than 75 lm/W, the second voltage-drop portion has a luminous efficiency smaller than 75 lm/W.