×

LIGHT EMITTING DIODE

  • US 20100163910A1
  • Filed: 06/09/2008
  • Published: 07/01/2010
  • Est. Priority Date: 06/20/2007
  • Status: Active Grant
First Claim
Patent Images

1. An LED chip (1) grown on an electrically insulating substrate (4), the LED chip comprising a lower current-distributing layer (5) of a first conductivity type, a first electrode (2), a vertical layer structure (5, 6, 7), the last two being formed on the lower current-distributing layer horizontally separated from each other, the vertical layer structure comprising an active layer (6) and an upper current-distributing layer (8) of a second conductivity type above the active layer, and a second electrode (3) formed on the upper current-distributing layer, the geometry of the electrodes being adjusted to provide a horizontal distance between the electrodes lower than the current spreading length of the chip, characterized in that a vertical trench (9) is formed between the electrodes (2, 3), the trench extending through the chip (1), including the lower current-distributing layer (5), for controlling the horizontal current flow in order to achieve a uniform current density over the active layer (6).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×