Light emitting diode having transparent conductive oxide formed on the contact layer

A light emitting diode comprising:

• a substrate formed on a first electrode;
• a first cladding layer of a first conductivity type formed on said substrate;
• an active layer formed on said first cladding layer;
• a second cladding layer of a second conductivity type formed on said active layer;
• a window layer of the second conductivity type formed on said second cladding layer, electrical resistivity of said window layer being less than electrical resistivity of said second cladding layer;
• a contact layer of the second conductivity type formed on said window layer for providing ohmic contact;
• an insulating region formed on a portion of said contact layer;
• a conductive transparent oxide layer formed on said contact layer and said insulating region, electrical resistivity of said conductive transparent oxide layer being less than electrical resistivity of said window layer and said contact layer;
• and
• a second electrode formed on a portion of said conductive transparent oxide layer, said second electrode being approximately aligned with said insulating region.

A light emitting diode comprising:

• a substrate formed on a first electrode;
• a first cladding layer of a first conductivity type formed on said substrate;
• an active layer formed on said first cladding layer;
• a second cladding layer of a second conductivity type formed on said active layer;
• a window layer of the second conductivity type formed on said second cladding layer, electrical resistivity of said window layer being less than electrical resistivity of said second cladding layer;
• a contact layer of the second conductivity type formed on said window layer for providing ohmic contact, portions of said contact layer and said window layer being ion implanted to form a resistive region of the second conductivity type;
• a conductive transparent oxide layer formed on said contact layer, electrical resistivity of said conductive transparent oxide layer being less than electrical resistivity of said window layer and said contact layer;
• and
• a second electrode formed on a portion of said conductive transparent oxide layer, said second electrode being approximately aligned with the resistive region in said contact layer and said window layer.

A light emitting diode comprising:

• a substrate formed on a first electrode;
• a first cladding layer of a first conductivity type formed on said substrate;
• an active layer formed on said first cladding layer;
• a second cladding layer of a second conductivity type formed on said active layer;
• a window layer of the second conductivity type formed on said second cladding layer, electrical resistivity of said window layer being less than electrical resistivity of said second cladding layer;
• a contact layer of the second conductivity type formed on said window layer for providing ohmic contact, portions of said contact layer and said window layer being ion diffused to form a diffused region of the second conductivity type, thereby resulting in a potential barrier between said window layer and the diffused region;
• a conductive transparent oxide layer formed on said contact layer, electrical resistivity of said conductive transparent oxide layer being less than electrical resistivity of said window layer and said contact layer;
• and
• a second electrode formed on a portion of said conductive transparent oxide layer, said second electrode being approximately aligned with the diffused region in said contact layer and said window layer.