Flexible electronic structure and methods for fabricating flexible electronic structures are provided. An example method includes applying a first layer to a substrate, creating a plurality of vias through the first layer to the substrate, and applying a second polymer layer to the first layer such
Flexible electronic structure and methods for fabricating flexible electronic structures are provided. An example method includes applying a first layer to a substrate, creating a plurality of vias through the first layer to the substrate, and applying a second polymer layer to the first layer such that the second polymer forms anchors contacting at least a portion of the substrate. At least one electronic device layer is disposed on a portion of the second polymer layer. At least one trench is formed through the second polymer layer to expose at least a portion of the first layer. At least a portion of the first layer is removed by exposing the structure to a selective etchant to providing a flexible electronic structure that is in contact with the substrate. The electronic structure can be released from the substrate.
대표청구항▼
1. A flexible electronic structure, comprising: a base polymer layer having a first surface and a second surface, wherein the first surface comprises a plurality of electrically non-conductive anchors;at least one electronic device layer disposed above a portion of the second surface of the base pol
1. A flexible electronic structure, comprising: a base polymer layer having a first surface and a second surface, wherein the first surface comprises a plurality of electrically non-conductive anchors;at least one electronic device layer disposed above a portion of the second surface of the base polymer, the electronic device layer comprising: two or more device islands; andat least one stretchable interconnect electrically coupling the two or more device islands; anda second polymer layer disposed above a portion of the at least one electronic device layer;wherein at least one anchor of the plurality of electrically non-conductive anchors is disposed beneath at least one of the two or more device islands; andwherein the flexible electronic structure is configured such that a strain-sensitive layer of the electronic device layer is at a neutral mechanical plane of the flexible electronic structure. 2. The flexible electronic structure of claim 1, wherein an average width of the plurality of electrically non-conductive anchors is in a range from about 10 μm to about 50 μm. 3. The flexible electronic structure of claim 1, wherein an average width of the plurality of electrically non-conductive anchors is in a range from about 0.1 μm to about 1000 μm. 4. The flexible electronic structure of claim 1, wherein at least some of the plurality of electrically non-conductive anchors have a substantially circular cross-section, a substantially hexagonal cross-section, a substantially oval cross-section, a substantially rectangular cross-section, a polygonal cross-section, or a non-polygonal cross-section. 5. The flexible electronic structure of claim 1, wherein the plurality of electrically non-conductive anchors are formed in a two-dimensional array. 6. The flexible electronic structure of claim 1, wherein an average width of the plurality of vias is in a range from about 10 μm to about 50 μm. 7. The flexible electronic structure of claim 1, wherein an average width of the plurality of vias is in a range from about 0.1 μm to about 1000 μm. 8. The flexible electronic structure of claim 1, wherein the plurality of vias have a pitch with an average separation ranging from about 50 μm to about 1,000 μm. 9. The flexible electronic structure of claim 1, wherein the plurality of vias have a pitch with an average separation ranging from about 0.2 to about 10,000 μm. 10. The flexible electronic structure of claim 1, wherein the plurality of vias have a pitch with an average separation ranging from about 200 to about 800 μm. 11. The flexible electronic structure of claim 1, wherein the second polymer layer comprises polyimide, polyethylene naphthalate, polybenzobisoxazole, benzocyclobutene, siloxane, or a liquid crystal polymer. 12. The flexible electronic structure of claim 1, wherein the at least one electronic device layer comprises a transistor, a light emitting diode, a transducer, a sensor, a battery, an integrated circuit, a semiconductor, a diode, arrays of electronic components, an optical system, a temperature sensors, a pressure sensor, an electrical-conductivity sensor, a chemical sensor, a resistor, a capacitor, a passive device, a photodiode, a photodetector, an emitter, a receiver, or a transceiver. 13. A flexible electronic structure, comprising: a base polymer layer having a first surface and a second surface, wherein the first surface comprises a plurality of electrically non-conductive anchors;at least one electronic device layer disposed above a portion of the second surface of the base polymer, the electronic device layer comprising: two or more device islands; andat least one stretchable interconnect electrically coupling the two or more device islands; anda top polymer layer that is disposed above at least a portion of the at least one electronic device layer,wherein at least one anchor of the plurality of electrically non-conductive anchors is disposed beneath at least one of the two or more device islands; andwherein a thickness of the top polymer layer or a thickness of the base layer is configured such that a strain-sensitive layer of the electronic device layer is at a neutral mechanical plane of the flexible electronic structure. 14. The flexible electronic structure of claim 13, wherein the thickness of the top polymer layer is configured such that the strain-sensitive layer of the at least one electronic device layer is at a neutral mechanical plane of the flexible electronic structure. 15. A flexible electronic structure, comprising: a base polymer layer having a first surface and a second surface, wherein the first surface comprises a plurality of electrically non-conductive anchors, and wherein at least one of the plurality of electrically non-conductive anchors contacts a substrate;at least one electronic device layer disposed above a portion of the second surface of the base polymer, the electronic device layer comprising: two or more device islands; andat least one stretchable interconnect electrically coupling the two or more device islands; anda second polymer layer disposed above a portion of the at least one electronic device layer;wherein at least one anchor of the plurality of electrically non-conductive anchors is disposed beneath at least one of the two or more device islands; andwherein the flexible electronic structure is configured such that a strain-sensitive layer of the electronic device layer is at a neutral mechanical plane of the flexible electronic structure. 16. The flexible electronic structure of claim 15, wherein an average width of each anchor of the plurality of electrically non-conductive anchors is in a range from about 10 μm to about 50 μm. 17. The flexible electronic structure of claim 15, wherein an average width of each anchor of the plurality of electrically non-conductive anchors is in a range from about 0.1 μm to about 1000 μm. 18. The flexible electronic structure of claim 15, wherein at least some of the plurality of electrically non-conductive anchors have a substantially circular cross-section, a substantially hexagonal cross-section, a substantially oval cross-section, a substantially rectangular cross-section, a polygonal cross-section, or a non-polygonal cross-section. 19. The flexible electronic structure of claim 15, wherein the plurality of electrically non-conductive anchors are formed in a two-dimensional array. 20. The flexible electronic structure of claim 15, wherein an average width of each of the plurality of vias is in a range from about 10 μm to about 50 μm. 21. The flexible electronic structure of claim 15, wherein an average width of each of the plurality of vias is in a range from about 0.1 μm to about 1000 μm. 22. The flexible electronic structure of claim 15, wherein the plurality of vias have a pitch with an average separation ranging from about 50 μm to about 1,000 μm. 23. The flexible electronic structure of claim 15, wherein the plurality of vias have a pitch with an average separation ranging from about 0.2 to about 10,000 μm. 24. The flexible electronic structure of claim 15, wherein the plurality of vias have a pitch with an average separation ranging from about 200 to about 800 μm. 25. The flexible electronic structure of claim 15, wherein the second polymer layer comprises polyimide, polyethylene naphthalate, polybenzobisoxazole, benzocyclobutene, siloxane, or a liquid crystal polymer. 26. The flexible electronic structure of claim 25, wherein the at least one electronic device layer comprises a transistor, a LED, a transducer, a sensor, a battery, an integrated circuit, a semiconductor, a diode, arrays of electronic components, an optical system, a temperature sensors, a pressure sensor, an electrical-conductivity sensor, a chemical sensor, a resistor, a capacitor, a passive device, a photodiode, a photodetector, an emitter, a receiver, or a transceiver. 27. A flexible electronic structure, comprising: a base polymer layer having a first surface and a second surface, wherein the first surface comprises a plurality of electrically non-conductive anchors, and wherein at least one of the plurality of electrically non-conductive anchors contacts a substrate;at least one electronic device layer disposed above a portion of the second surface of the base polymer, the electronic device layer comprising: two or more device islands; andat least one stretchable interconnect electrically coupling the two or more device islands; anda top polymer layer that is disposed above at least a portion of the at least one electronic device layerwherein at least one anchor of the plurality of electrically non-conductive anchors is disposed beneath at least one of the two or more device islands; andwherein a thickness of the top polymer layer or a thickness of the base layer is configured such that a strain-sensitive layer of the electronic device layer is at a neutral mechanical plane of the flexible electronic structure. 28. The flexible electronic structure of claim 27, wherein the thickness of the top polymer layer is configured such that the strain-sensitive layer of the at least one electronic device layer is at a neutral mechanical plane of the flexible electronic structure. 29. A flexible electronic structure, comprising: a base polymer layer having a first surface and a second surface, wherein: the first surface comprises a plurality of electrically non-conductive anchors;the plurality of electrically non-conductive anchors have a diameter of about 50 μm and have a pitch ranging from about 200 μm to about 800 μm; andat least one electronic device layer disposed above the second surface of the base polymer layer, the electronic device layer comprising: two or more device islands; andat least one stretchable interconnect electrically coupling the two or more device islands; anda second polymer layer disposed above a portion of the at least one electronic device layer;wherein at least one anchor of the plurality of electrically non-conductive anchors is disposed beneath at least one of the two or more device islands; andwherein the flexible electronic structure is configured such that a strain-sensitive layer of the electronic device layer is at a neutral mechanical plane of the flexible electronic structure.
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