Printable inorganic semiconductor structures
First Claim
1. A printable inorganic semiconductor structure comprising:
- a handle substrate;
an interlayer adhered to the handle substrate and forming an anchor;
a sacrificial layer disposed on or over portions of the interlayer adjacent to the anchor, the interlayer having a different chemical selectivity than the sacrificial layer;
a semiconductor layer disposed on or over at least portions of the sacrificial layer; and
a semiconductor element made from at least the semiconductor layer, the semiconductor element having an exposed substrate side and a handle side opposite the exposed substrate side adjacent to the sacrificial layer, wherein the semiconductor element comprises a first electrical contact on the semiconductor layer, a cantilever extension comprising a portion of the semiconductor layer, and a second electrical contact on the cantilever extension,wherein the sacrificial layer covers the first and second electrical contacts, the sacrificial layer covers at least a portion of the handle side of the semiconductor element, and a portion of the sacrificial layer is exposed.
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Accused Products
Abstract
The present invention provides structures and methods that enable the construction of micro-LED chiplets formed on a sapphire substrate that can be micro-transfer printed. Such printed structures enable low-cost, high-performance arrays of electrically connected micro-LEDs useful, for example, in display systems. Furthermore, in an embodiment, the electrical contacts for printed LEDs are electrically interconnected in a single set of process steps. In certain embodiments, formation of the printable micro devices begins while the semiconductor structure remains on a substrate. After partially forming the printable micro devices, a handle substrate is attached to the system opposite the substrate such that the system is secured to the handle substrate. The substrate may then be removed and formation of the semiconductor structures is completed. Upon completion, the printable micro devices may be micro transfer printed to a destination substrate.
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Citations
20 Claims
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1. A printable inorganic semiconductor structure comprising:
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a handle substrate; an interlayer adhered to the handle substrate and forming an anchor; a sacrificial layer disposed on or over portions of the interlayer adjacent to the anchor, the interlayer having a different chemical selectivity than the sacrificial layer; a semiconductor layer disposed on or over at least portions of the sacrificial layer; and a semiconductor element made from at least the semiconductor layer, the semiconductor element having an exposed substrate side and a handle side opposite the exposed substrate side adjacent to the sacrificial layer, wherein the semiconductor element comprises a first electrical contact on the semiconductor layer, a cantilever extension comprising a portion of the semiconductor layer, and a second electrical contact on the cantilever extension, wherein the sacrificial layer covers the first and second electrical contacts, the sacrificial layer covers at least a portion of the handle side of the semiconductor element, and a portion of the sacrificial layer is exposed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A printable inorganic semiconductor structure comprising:
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a handle substrate; an interlayer adhered to the handle substrate and forming an anchor; a semiconductor layer disposed over at least portions of the interlayer; and a semiconductor element made from at least a semiconductor layer, the semiconductor element having an exposed substrate side and a handle side opposite the exposed substrate side adjacent to the sacrificial layer, wherein the semiconductor element comprises a first electrical contact on the semiconductor layer, a cantilever extension comprising a portion of the semiconductor layer, and a second electrical contact on the cantilever extension, wherein the semiconductor element is adjacent to the anchor and a physical separation exists between the semiconductor element and the interlayer. - View Dependent Claims (20)
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Specification