Abstract: A body-mountable device may include a first polymer layer, a second polymer layer, and a structure that includes a sensor between the first and second polymer layers. Forming the body-mountable device may involve positioning the structure on the first polymer layer and then forming, in a molding piece, the second polymer layer over the structure positioned on the first polymer layer. The molding piece includes a surface that supports the second polymer layer as the second polymer layer is being formed and a protrusion that extends from the surface to the sensor through the second polymer layer as the second polymer layer is being formed. The body-mountable device that is removed from the molding piece has a channel to the sensor formed by the protrusion.

Abstract: An eye-mountable device includes an electrochemical sensor embedded in a polymeric material configured for mounting to a surface of an eye. The electrochemical sensor includes a working electrode and a reference electrode that reacts with an analyte to generate a sensor measurement related to a concentration of the analyte in a fluid to which the eye-mountable device is exposed. An example assembly process includes: forming a sacrificial layer on a working substrate; forming a first layer of a bio-compatible material on the sacrificial layer; providing an electronics module on the first layer of the bio-compatible material, forming a second layer of the bio-compatible material to cover the electronics module; and annealing the first and second layers of the bio-compatible material together to form an encapsulated structure having the electronics module fully encapsulated by the bio-compatible material.

Abstract: A battery includes an electrolyte disposed on a substantially planar substrate. The electrolyte has a first surface extending from the substrate and in contact with a cathode. The electrolyte has a second surface extending from the substrate and in contact with an anode. The second surface is opposite the first surface. The anode and the cathode are non-overlapping. The battery additionally includes a biocompatible protective layer that covers the electrolyte and at least portions of the anode and cathode. The battery can be disposed in an eye-mountable device or other device to power electronics in the device. The battery can be configured to be rechargeable.

Abstract: Systems and methods for the wireless transfer of power between two hermetically sealed devices are described herein. An example system may include a battery package and a hermetically sealed body-implantable electronic device having an electronics package. The battery package may include one or more alignment structures, configured to removably align the battery package with the electronic device, a battery, and a wireless power transceiver. At least the battery and the wireless power transceiver of the battery package may be contained within a hermetic material separate from the electronic device. Power may be wirelessly transferred between the devices by any means, including inductive coupling or capacitive coupling. In some examples, the hermetically-sealed devices may be implanted in a living body.

Abstract: A contact lens having a thin silicon chip integrated therein is provided along with methods for assembling the silicon chip within the contact lens. In an aspect, a method includes creating a plurality of lens contact pads on a lens substrate and creating a plurality of chip contact pads on a chip. The method further involves applying assembly bonding material to the each of the plurality of lens contact pads or chip contact pads, aligning the plurality of lens contact pads with the plurality of chip contact pads, bonding the chip to the lens substrate via the assembly bonding material using flip chip bonding, and forming a contact lens with the lens substrate.

Abstract: A flexible electronic device is provided that includes electronics, metal traces, and other components at least partially encapsulated in a protective, corrosion- and fluid-resistant encapsulating adhesive coating. The device include electronics, sensors, and other components disposed on a flexible substrate that is configured to be mounted to a body or disposed in some other environment of interest. The encapsulating adhesive coating is flexible and adheres securely to the electronics, metal traces, and other components disposed on the flexible substrate. The encapsulating adhesive coating prevents voids from forming proximate the components within which water or other chemicals could be deposited from the environment of the device. The encapsulating adhesive coating could include silicone or other flexible highly adhesive substances. The encapsulating adhesive coating could be a conformal coating.

Abstract: An eye-mountable device includes a transparent polymer and a structure embedded in the transparent polymer. The transparent polymer defines a posterior side and an anterior side of the eye-mountable device, and the transparent polymer has a concave surface and a convex surface. The structure includes a substrate, an antenna comprising a conductive loop, and a sensor that is configured to detect an analyte. The substrate includes a loop portion and a tab portion, where the loop portion has an outer circumference defined by an outer diameter and an inner circumference defined by an inner diameter, and where the tab portion extends from the inner circumference of the loop portion towards a center of the loop portion. The conductive loop is disposed on the loop portion of the substrate between the inner circumference and outer circumference, and the sensor is disposed on the tab portion of the substrate.

Abstract: A multi-colored display includes a semiconductor substrate layer, a first light emitting diode (“LED”) integrated onto the semiconductor substrate layer to natively emit pump light having a first color, a second LED integrated onto the semiconductor substrate layer to natively emit the pump light having the first color, and a first wavelength conversion layer disposed over an emission aperture of the second LED to convert the pump light natively emitted from the second LED to first output light having a second color different from the first color of the pump light. The first wavelength conversion layer includes a first matrix of quantum dots. The first and second LEDs are integrated into a single semiconductor die.

Abstract: A battery includes an electrolyte disposed on a substantially planar substrate. The electrolyte has a first surface extending from the substrate and in contact with a cathode. The electrolyte has a second surface extending from the substrate and in contact with an anode. The second surface is opposite the first surface. The anode and the cathode are non-overlapping. The battery additionally includes a biocompatible protective layer that covers the electrolyte and at least portions of the anode and cathode. The battery can be disposed in an eye-mountable device or other device to power electronics in the device. The battery can be configured to be rechargeable.

Abstract: An example device includes a lithium-based battery having conductive battery contacts protruding from a surface of the battery, where a non-conductive potion of the surface of the battery separates the conductive battery contacts. The battery is a type that undergoes an expansion during charging in which the expansion of the lithium-based battery includes an outward bulging of the non-conductive portion of the battery surface. The device includes a substrate having conductive substrate contacts. The conductive battery contacts are electrically connected to the respective conductive substrate contact via a flexible electrically-conductive adhesive that physically separates the conductive battery contacts from the respective conductive substrate contacts and allows for relative movement therebetween caused by the expansion of the lithium-based battery.

Abstract: Body-mountable devices and methods for embedding a structure in a body-mountable device are described. A body-mountable device includes a transparent polymer and a structure embedded in the transparent polymer. The transparent polymer defines a posterior side and an anterior side of the body-mountable device. The structure has an outer diameter and an inner diameter and includes a sensor configured to detect an analyte and an antenna. The antenna includes a plurality of conductive loops spaced apart from each other between the outer diameter and the inner diameter.

Abstract: Apparatus, systems and methods employing contact lenses having one or more sensor that sense an analyte in tear fluid and one or more recesses that collect the tear fluid. In some aspects, a contact lens includes a substrate that forms at least part of a body of the contact lens and a recess formed within the substrate configured to collect tear fluid when the contact lens is worn. The contact lens further includes at least one sensor disposed within the substrate configured to sense presence of an analyte in the collected tear fluid.

Abstract: Apparatus, systems and methods facilitating contact lenses that detect fatigue or emotional state of a wearer of the contact lenses are provided. In some aspects, a contact lens includes: a substrate; one or more sensors disposed on or within the substrate, wherein the one or more sensors senses fatigue and/or an emotional state of a wearer of the contact lens; and an antenna disposed on or within the substrate, that communicates information sensed by the one or more sensors. In various aspects, systems can include the contact lens, a reader that can process the information sensed and an alarm generation component that can generate an alarm based on the determined fatigue and/or emotional state of the wearer of the contact lens.

Abstract: A method may involve: forming a sacrificial layer on a working substrate; forming a first bio-compatible layer on the sacrificial layer such that the first bio-compatible layer adheres to the sacrificial layer; forming a conductive pattern on the first bio-compatible layer; mounting an electronic component to the conductive pattern; forming a second bio-compatible layer over the first bio-compatible layer, the electronic component, and the conductive pattern; and removing the sacrificial layer to release the bio-compatible device from the working substrate. The first bio-compatible layer defines a first side of a bio-compatible device. The second bio-compatible layer defines a second side of the bio-compatible device.

Abstract: A body-mountable device may be formed of a polymeric material. A molding form can define a cavity and polymeric material can be formed using the mold to create a device shaped in accordance with the cavity. Electronics disposed on a substrate can be encapsulated within the polymeric material by forming a first layer of polymeric material, positioning the substrate on the first layer, and then forming a second layer of polymeric material over the substrate. A channel can expose a sensor disposed on the substrate. The channel may be formed while molding the second layer of polymeric material over the substrate. The molding form can include a protrusion that extends toward the sensor. A sacrificial sealant material can be applied to the sensor or the protrusion to create a seal between the protrusion and the sensor. The polymeric material forms around the sealed protrusion to create the channel.

Abstract: An electrochemical battery can include electrodes (a cathode and an electrode) arranged on respective surfaces of an electrolyte. The electrodes and electrolyte can each be solid state films that can be layered on top of one another to create a stacked structure disposed on a substrate. A polymeric sealant material can be applied over and around the battery stack and a moisture barrier can be formed over the sealant material to thereby prevent moisture from reaching the battery. Conductive terminals electrically coupled to the cathode and anode, respectively, can be formed on a second side of the substrate. As such, the battery can be flip-chip mounted to corresponding mounting pads and thereby connected to other electronics that can receive power from the battery.

Abstract: An electrochemical sensor is disposed on a sensor substrate suitable for flip-chip mounting to another substrate. The electrochemical sensor can be fabricated in bulk by patterning sets of electrodes on a common substrate with vias that electrically couple each electrode to a conductive pad on the opposite side of the substrate. The substrate with electrodes thereon can then be diced and the individual electrochemical sensors can be flip-chip mounted in a body-mountable device in which the sensor can be used to obtain analyte concentrations. As a result, fabrication of the electrochemical sensor electrodes can be isolated from fabrication of the other electronics in the device, which can facilitate efficient fabrication of the sensor and allows for other electronics to be fabricated without restrictions associated with the electrode fabrication.

Abstract: A manufacturing method for a wireless device may involve placing a plurality of antennas on a plastic layer, wherein each of the antennas comprises one or more conductive loops positioned within an inner diameter and an outer diameter; placing a plurality of sensor chips on the plastic layer such that each sensor chip is interconnected to a respective antenna on the plastic layer and is positioned within the inner diameter and outer diameter of the respective antenna, wherein each sensor chip has a respective sensor facing away from the plastic layer and has respective electrical contacts interconnected with the respective antenna; and providing an encapsulation layer over the plurality of antennas and the plurality of sensor chips on the plastic layer.

Abstract: Techniques and mechanisms for providing an eye-mountable device including an accommodation actuator. In an embodiment, fabrication of the eye-mountable device includes sealing layers of enclosure material to form a lens enclosure comprising a pinch-off region where the layers of enclosure material physically contact one another. The accommodation actuator includes a liquid crystal layer disposed between the layers of enclosure material in a central region around which the pinch-off region extends. In another embodiment, electrodes are disposed in the central region each between the liquid crystal layer and a respective one of the layers of enclosure material. The liquid crystal layer isolates the electrodes from one another in the central region.