Electronic device having spatially inverted thin film transistors
View Patent ↗The invention relates to an electronic device including a sequence of a first thin film transistor (TFT) and a second TFT, the first TFT including a first set of electrodes separated by a first insulator, the second TFT comprising a second set of electrodes separated by a second insulator, wherein the first set of electrodes and the second set of electrodes are formed from a first shared conductive layer and a second shared conductive layer, the first insulator and the second insulator being formed by a shared dielectric layer. The invention further relates to a method of manufacturing an electronic device.
1. An electronic device comprising a sequence of a first thin film transistor (TFT) and a second TFT, the first TFT comprising a first set of electrodes separated by a first insulator, the second TFT comprising a second set of electrodes separated by a second insulator, wherein
a first part of the first set of electrodes and a first part of the second set of electrodes are formed from a first shared conductive layer, a second part of the first set of electrodes and a second part of the second set of electrodes are formed from a second shared conductive layer, the first insulator and the second insulator being formed by a shared dielectric layer, wherein like components of the second TFT are spatially inverted with respect to like components of the first TFT, wherein the first part of the first set of electrodes and the first part of the second set of electrodes are disposed above the shared dielectric layer, and the second part of the first set of electrodes and the second part of the second set of electrodes are disposed below the shared dielectric layer.
2. The electronic device according to claim 1 , wherein the like components comprise a gate, a drain and/or a source.
3. The electronic device according to claim 2 , wherein the first TFT comprises bottom-gate architecture and the second TFT comprises top-gate architecture.
4. The electronic device according to claim 1 , wherein at least one of a semiconductor layer of the first TFT and/or a semiconductor layer of the second TFT are selectable from the group comprising an organic material and an inorganic material.
5. The electronic device according to claim 1 , wherein the shared dielectric layer comprises a layer of a first material and a layer of a second material.
6. The electronic device according to claim 5 , wherein the first material has a dielectric constant in a range of 3.0-4.0, and the second material has a dielectric constant in a range of 1.9-4.0.
7. The electronic device according to claim 5 , wherein the first material has a water contact angle in a range of 60-100 degrees, and the second material has a water contact angle in a range of 0-10 degrees.
8. The electronic device according to claim 1 , wherein the dielectric layer comprises a mixture of materials.
9. The electronic device according to claim 8 , wherein materials constituting the mixture are homogeneously distributed along the dielectric layer.
10. The electronic device according to claim 8 , wherein materials constituting the mixture are phase-separated.
11. The electronic device according to claim 1 , further comprising a flexible substrate.
12. The electronic device according to claim 1 , wherein a semiconductor layer of at least one of the first TFT and/or the second TFT comprises a silicon-based semiconductor material.
13. The electronic device of claim 11 , wherein the flexible substrate is a foil.
14. The electronic device of claim 12 , wherein the silicon-based semiconductor material is a low-temperature poly-silicon.