Electronic devices having a layer overlying an edge of a different layer and a process for forming the same
View Patent ↗An electronic device includes a radiation-emitting component, a radiation-responsive component, or a combination thereof. In one embodiment, the electronic device includes a substrate and a first structure overlying the substrate. The electronic device also includes a second structure that includes a first layer, wherein the first layer has a first refractive index, and the first layer includes a first edge. The electronic device further includes a second layer overlying at least portions of the first structure and the second structure at the first edge. The second layer has a second refractive index that is lower than the first refractive index. In another embodiment, the first structure includes a layer having a perimeter and a pattern lying within the perimeter. The pattern extends at least partly though the first layer to define an opening with a first edge. In another embodiment, a process is used to form the electronic device.
1. An electronic device including a radiation-emitting component or a radiation-responsive component, or a combination thereof, the electronic device comprising:
a substrate;
a first structure overlying the substrate, wherein the first structure is an electrically active structure;
a second structure overlying at least portions of the first structure and the substrate, wherein:
the second structure comprises a first layer;
the first layer has a first refractive index; and
the first layer comprises a first edge; and
a second layer overlying at least portions of the first structure and the second structure, wherein:
the second layer has a second refractive index that is lower than the first refractive index;
the second layer includes a first portion and a second portion;
the first portion of the second layer overlies both the first structure at the first edge and the second structure; and
the second portion of the second layer overlies the first structure but not the second structure.
2. The electronic device of claim 1 , wherein the second structure includes a well structure.
3. The electronic device of claim 1 , wherein the first structure further comprises a third layer having a third refractive index, wherein:
a first difference is an absolute value of the first refractive index minus the second refractive index;
a second difference is an absolute value of the first refractive index minus the third refractive index; and
the first difference is larger than the second difference.
4. The electronic device of claim 3 , wherein:
the substrate comprises a fourth layer having a fourth refractive index; and
the fourth layer is optically coupled to the first layer, the second layer, and the third layer.
5. The electronic device of claim 1 , wherein the first structure has a second edge, wherein the first layer overlies the second edge.
6. The electronic device of claim 5 , wherein the first edge of the second structure includes a receding edge, wherein the receding edge overlies the second edge of the first structure.
7. The electronic device of claim 1 , wherein the second layer comprises an organic active layer.
8. The electronic device of claim 1 , wherein the second structure does not have en upper portion that is spaced apart and overhangs a lower portion of the second structure, wherein the lower portion lies between the upper portion and the substrate.
9. An electronic device comprising:
a substrate;
a first structure overlying the substrate, wherein:
the first structure comprises a first layer having a first refractive index, a perimeter and a pattern lying within the perimeter; and
the pattern extends at least partly through the first layer to define an opening with a first edge;
a second structure overlying the opening and at least portions of the first structure and the substrate, wherein:
the second structure comprises a second layer having a second refractive index
that comprises a second edge; and
a third layer having a third refractive index overlying at least portions of the first structure and the second structure, wherein:
the third layer includes a first portion and a second portion;
the first portion of the third layer overlies the first structure and the second structure at the second edge;
the second portion of the third layer overties the first structure but not the second structure and wherein:
a first difference is an absolute value of the first refractive index minus the second refractive index;
a second difference is an absolute value of the first refractive index minus the third refractive index; and
the first difference is larger than the second difference.
10. The electronic device of claim 9 , wherein the second structure includes a well structure.
11. The electronic device of claim 9 , wherein the third layer overlies the first edge.
12. The electronic device of claim 9 , wherein the second edge of the second structure includes a receding edge, wherein the receding edge overlies the first edge of the first structure.
13. The electronic device of claim 9 , wherein the third layer comprises an organic active layer.