Abstract: A printed structure includes a substrate comprising a substrate surface, a substrate circuit disposed in or on in a circuit area of the substrate surface, a substrate post protruding from the substrate surface exterior to the circuit area, and a component having a component top side and a component bottom side opposite the component top side. The component bottom side can be disposed on the substrate post and adhered to the substrate surface forming an air gap between the component bottom side and the substrate circuit. The substrate post can comprise a substrate post material that is a cured adhesive. Some embodiments comprise a substrate electrode and the component comprises an electrically conductive connection post extending from the component bottom side toward the substrate in electrical contact with the substrate electrode.

Abstract: A method of micro-transfer printing includes providing a stamp controlled by a motion-control platform and a micro-component source wafer comprising a micro-component disposed over a cavity in a surface of the micro-component source wafer and connected to the micro-component source wafer with a tether. The stamp can contact the micro-component to adhere the micro-component to the stamp. The stamp and the micro-component can be removed from the micro-component source wafer by moving the stamp in a vertical direction orthogonal to the surface and in a horizontal direction parallel to the surface.

Abstract: A micro-transfer structure comprises a stamp comprising a rigid support, only a single contiguous bulk layer disposed on the rigid support, and posts disposed on the bulk layer. Components are adhered to (e.g., disposed in contact with) some but not all of the posts. The posts can be substantially identical and disposed in a regular array on the bulk layer. Each component is adhered to (e.g., in contact with) two or more posts. Components can be disposed on a source wafer entirely over sacrificial portions of a sacrificial layer on or in the source wafer and attached to anchors disposed between sacrificial portions with a tether.

Abstract: A method of printing comprises providing a component source wafer comprising components, a transfer device, and a patterned substrate. The patterned substrate comprises substrate posts that extend from a surface of the patterned substrate. Components are picked up from the component source wafer by adhering the components to the transfer device. One or more of the picked-up components are printed to the patterned substrate by disposing each of the one or more picked-up components onto one of the substrate posts, thereby providing one or more printed components in a printed structure.

Abstract: A micro-optical structure includes a structure substrate comprising a cavity and a micro-optical component disposed entirely and directly over or in the cavity. The micro-optical component includes a micro-optical element and a component tether physically attached to an anchor portion of the structure substrate and in contact with the micro-optical element. The structure substrate and the micro-optical component can be monolithic, for example unitary and comprise a same material or are the same material. The micro-optical component can be disposed on a sacrificial portion disposed on a micro-optical component source wafer differentially etchable form the sacrificial portion. The micro-optical component can be disposed on a micro-optical component source wafer patterned with an encapsulation layer where the micro-optical component is differentially etchable from the encapsulation layer and the micro-optical component.

Abstract: The disclosed technology provides micro-assembled micro-LED displays and lighting elements using arrays of micro-LEDs that are too small (e.g., micro-LEDs with a width or diameter of 10 ?m to 50 ?m), numerous, or fragile to assemble by conventional means. The disclosed technology provides for micro-LED displays and lighting elements assembled using micro-transfer printing technology. The micro-LEDs can be prepared on a native substrate and printed to a display substrate (e.g., plastic, metal, glass, or other materials), thereby obviating the manufacture of the micro-LEDs on the display substrate. In certain embodiments, the display substrate is transparent and/or flexible.

Abstract: A overhanging device cavity structure comprises a substrate and a cavity disposed in or on the substrate. The cavity comprises a first cavity side wall and a second cavity side wall opposing the first cavity side wall on an opposite side of the cavity from the first cavity side wall. A support extends from the first cavity side wall to the second cavity side wall and at least partially divides the cavity. A device is disposed on, for example in direct contact with, the support and extends from the support into the cavity.

Abstract: The disclosed technology provides micro-assembled micro-LED displays and lighting elements using arrays of micro-LEDs that are too small (e.g., micro-LEDs with a width or diameter of 10 ?m to 50 ?m), numerous, or fragile to assemble by conventional means. The disclosed technology provides for micro-LED displays and lighting elements assembled using micro-transfer printing technology. The micro-LEDs can be prepared on a native substrate and printed to a display substrate (e.g., plastic, metal, glass, or other materials), thereby obviating the manufacture of the micro-LEDs on the display substrate. In certain embodiments, the display substrate is transparent and/or flexible.

Abstract: An exemplary micro-optical component includes a micro-substrate and a micro-optical element disposed on the micro-substrate. The micro-optical element is structured to modify or process light. At least a portion of a component tether is physically attached to the micro-substrate or physically attached to the micro-optical element. The micro-optical component has a thickness less than 250 ?m. Light can be processed by reflection, refraction, diffraction, frequency changes, polarization changes, color-temperature or frequency distribution changes, or phase changes. The micro-optical component can be disposed on a system substrate to form a micro-optical system. The system substrate can include a cavity and the micro-optical element can be disposed at least partially in the cavity. Micro-optical components can be passive optical micro-devices. A light-active element can be disposed on the micro-substrate to receive light from or emit light to the micro-optical element.

Abstract: A method of printing comprises providing a component source wafer comprising components, a transfer device, and a patterned substrate. The patterned substrate comprises substrate posts that extend from a surface of the patterned substrate. Components are picked up from the component source wafer by adhering the components to the transfer device. One or more of the picked-up components are printed to the patterned substrate by disposing each of the one or more picked-up components onto one of the substrate posts, thereby providing one or more printed components in a printed structure.

Abstract: A micro-transfer structure comprises a stamp comprising a rigid support, only a single contiguous bulk layer disposed on the rigid support, and posts disposed on the bulk layer. Components are adhered to (e.g., disposed in contact with) some but not all of the posts. The posts can be substantially identical and disposed in a regular array on the bulk layer. Each component is adhered to (e.g., in contact with) two or more posts. Components can be disposed on a source wafer entirely over sacrificial portions of a sacrificial layer on or in the source wafer and attached to anchors disposed between sacrificial portions with a tether.

Abstract: A micro-transfer structure comprises a stamp comprising a rigid support, only a single contiguous bulk layer disposed on the rigid support, and posts disposed on the bulk layer. Components are adhered to (e.g., disposed in contact with) some but not all of the posts. The posts can be substantially identical and disposed in a regular array on the bulk layer. Each component is adhered to (e.g., in contact with) two or more posts. Components can be disposed on a source wafer entirely over sacrificial portions of a sacrificial layer on or in the source wafer and attached to anchors disposed between sacrificial portions with a tether.

Abstract: The disclosed technology provides micro-assembled micro-LED displays and lighting elements using arrays of micro-LEDs that are too small (e.g., micro-LEDs with a width or diameter of 10 ?m to 50 ?m), numerous, or fragile to assemble by conventional means. The disclosed technology provides for micro-LED displays and lighting elements assembled using micro-transfer printing technology. The micro-LEDs can be prepared on a native substrate and printed to a display substrate (e.g., plastic, metal, glass, or other materials), thereby obviating the manufacture of the micro-LEDs on the display substrate. In certain embodiments, the display substrate is transparent and/or flexible.

Abstract: A printed structure includes a substrate comprising a substrate surface, a substrate circuit disposed in or on in a circuit area of the substrate surface, a substrate post protruding from the substrate surface exterior to the circuit area, and a component having a component top side and a component bottom side opposite the component top side. The component bottom side can be disposed on the substrate post and adhered to the substrate surface forming an air gap between the component bottom side and the substrate circuit. The substrate post can comprise a substrate post material that is a cured adhesive. Some embodiments comprise a substrate electrode and the component comprises an electrically conductive connection post extending from the component bottom side toward the substrate in electrical contact with the substrate electrode.

Abstract: Embodiments disclosed herein include devices and methods of using devices for protecting a face and/or head of an individual receiving medical treatment in a supine or reclined position. The device includes a body having a top portion with an exterior surface and a base portion with an interior surface. The top portion includes opposing side edges, the base portion includes opposing bottom side edges extending outwardly from the top side edges. The base portion is flexible and is configured to wrap partially around the individual’s head, while an aperture extends between the exterior surface and the interior surface to provide access to at least one of the individual’s eyes, nose, or mouth. A strap spans the side edges, wraps behind the base portion and the individual’s head, and detachably couples to the exterior surface along a plurality of connection positions along the side edges.

Abstract: A method of printing comprises providing a component source wafer comprising components, a transfer device, and a patterned substrate. The patterned substrate comprises substrate posts that extend from a surface of the patterned substrate. Components are picked up from the component source wafer by adhering the components to the transfer device. One or more of the picked-up components are printed to the patterned substrate by disposing each of the one or more picked-up components onto one of the substrate posts, thereby providing one or more printed components in a printed structure.

Abstract: A method of making a micro-module structure comprises providing a substrate, the substrate having a substrate surface and comprising a substrate post protruding from the substrate surface. A component is disposed on the substrate post, the component having a component top side and a component bottom side opposite the component top side, the component bottom side disposed on the substrate post. The component extends over at least one edge of the substrate post. One or more component electrodes are disposed on the component.

Abstract: In an aspect, a system and method for assembling a semiconductor device on a receiving surface of a destination substrate is disclosed. In another aspect, a system and method for assembling a semiconductor device on a destination substrate with topographic features is disclosed. In another aspect, a gravity-assisted separation system and method for printing semiconductor device is disclosed. In another aspect, various features of a transfer device for printing semiconductor devices are disclosed.

Abstract: A overhanging device cavity structure comprises a substrate and a cavity disposed in or on the substrate. The cavity comprises a first cavity side wall and a second cavity side wall opposing the first cavity side wall on an opposite side of the cavity from the first cavity side wall. A support extends from the first cavity side wall to the second cavity side wall and at least partially divides the cavity. A device is disposed on, for example in direct contact with, the support and extends from the support into the cavity.

Abstract: A stamp for micro-transfer printing includes a support having a support stiffness and a support coefficient of thermal expansion (CTE). A pedestal layer is formed on the support, the pedestal layer having a pedestal layer stiffness that is less than the support stiffness and a pedestal layer coefficient of thermal expansion (CTE) that is different from the support coefficient of thermal expansion (CTE). A stamp layer is formed on the pedestal layer, the stamp layer having a body and one or more protrusions extending from the body in a direction away from the pedestal layer. The stamp layer has a stamp layer stiffness that is less than the support stiffness and a stamp layer coefficient of thermal expansion that is different from the support coefficient of thermal expansion.