Semiconductor light emimiting device
First Claim
1. A semiconductor light emitting device comprising:
- a substrate made of a semiconductor of a first conductivity-type;
a first light reflecting layer made of a semiconductor of the first conductivity-type and provided on a main surface of the substrate;
an active layer made of a semiconductor including InGaAlP and provided on the first reflecting layer;
a second light reflecting layer made of a semiconductor of a second conductivity-type and provided on the active layer;
a current blocking layer having an opening, only through the opening a current flowing into the active layer;
a transparent electrode provided on the second light reflecting layer;
a front surface electrode provided on the transparent electrode and having an opening through which emission from the active layer is extracted; and
a rear surface electrode provided on a rear surface of the substrate, wherein the current supplied by the transparent electrode located under the opening of the front surface electrode and flowing into the active layer through the opening of the current blocking layer causes the active layer to emit light, the light being reflected repeatedly between the first and the second light reflecting layers and extracted via the transparent electrode under the opening of the front surface electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor light emitting device has a substrate made of a semiconductor of a first conductivity-type, a first light reflecting layer made of a semiconductor of the first conductivity-type and provided on a main surface of the substrate, an active layer made of a semiconductor including InGaAlP and provided on the first reflecting layer, a second light reflecting layer made of a semiconductor of a second conductivity-type and provided on the active layer, a current blocking layer having an opening, only through the opening a current flowing into the active layer, a transparent electrode provided on the second light reflecting layer, a front surface electrode provided on the transparent electrode and having an opening through which emission from the active layer is extracted; and a rear surface electrode provided on a rear surface of the substrate. The current supplied by the transparent electrode located under the opening of the front surface electrode and flowing into the active layer through the opening of the current blocking layer causes the active layer to emit light, the light being reflected repeatedly between the first and the second light reflecting layers and extracted via the transparent electrode under the opening of the front surface electrode.
55 Citations
23 Claims
-
1. A semiconductor light emitting device comprising:
-
a substrate made of a semiconductor of a first conductivity-type;
a first light reflecting layer made of a semiconductor of the first conductivity-type and provided on a main surface of the substrate;
an active layer made of a semiconductor including InGaAlP and provided on the first reflecting layer;
a second light reflecting layer made of a semiconductor of a second conductivity-type and provided on the active layer;
a current blocking layer having an opening, only through the opening a current flowing into the active layer;
a transparent electrode provided on the second light reflecting layer;
a front surface electrode provided on the transparent electrode and having an opening through which emission from the active layer is extracted; and
a rear surface electrode provided on a rear surface of the substrate, wherein the current supplied by the transparent electrode located under the opening of the front surface electrode and flowing into the active layer through the opening of the current blocking layer causes the active layer to emit light, the light being reflected repeatedly between the first and the second light reflecting layers and extracted via the transparent electrode under the opening of the front surface electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A semiconductor light emitting device comprising:
-
a substrate made of a semiconductor of a first conductivity-type;
a first light reflecting layer made of a semiconductor of the first conductivity-type and provided on a main surface of the substrate;
an active layer made of a semiconductor including InGaAlP and provided on the first light reflecting layer;
a current blocking layer provided on the active layer and having an opening, only through the opening a current flowing into the active layer;
a transparent electrode provided on the current blocking layer and over the active layer provided under the opening of the current blocking layer a front surface electrode provided on the transparent electrode and having an opening through which emission from the active layer is picked up;
a second light reflecting layer provided over the transparent electrode located under the opening of the front surface electrode; and
a rear surface electrode provided on a rear surface of the substrate, wherein the current injected from the transparent electrode located under the opening of the front surface electrode and flowing into the active layer through the opening of the current blocking layer causes the active layer to emit light, the light extracted via the transparent electrode located under the opening of the front surface electrode and the second light reflecting layer. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A semiconductor light emitting device comprising:
-
a substrate;
a first light reflecting layer made of a semiconductor of a first conductivity-type and provided on a main surface of the substrate;
a semiconductor layer made of a semiconductor of the first conductivity-type and provided on the first light reflecting layer;
an active layer made of a semiconductor including InGaAlP and provided on a first portion of the semiconductor layer of the first conductivity-type;
a current blocking layer provided on the active layer and having an opening, only through the opening a current flowing into the active layer;
a transparent electrode provided on the current blocking layer and over the active layer provided under the opening of the current blocking layer;
a first surface electrode provided on the transparent electrode and having an opening through which emission from the active layer is picked up;
a second light reflecting layer provided over the transparent electrode located under the opening of the first surface electrode; and
a second surface electrode provided on a second portion different from the first portion of the semiconductor layer of the first conductivity-type, wherein the current injected from the transparent electrode located under the opening of the front surface electrode and flowing into the active layer through the opening of the current blocking layer causes the active layer to emit light, the light being reflected repeatedly between the first and the second light reflecting layers. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
-
Specification