Abstract: Pixels in an organic light-emitting diode (OLED) display may be microcavity OLED pixels having optical cavities. The optical cavities may be defined by a partially transparent cathode layer and a reflective anode structure. The anode of the pixels may include both the reflective anode structure and a supplemental anode that is transparent and that is used to tune the thickness of the optical cavity for each pixel. Organic light-emitting diode layers may be formed over the pixels and may have a uniform thickness in each pixel in the display. Pixels may have a conductive spacer between a transparent anode portion and a reflective anode portion, without an intervening dielectric layer. The conductive spacer may be formed from a material such as titanium nitride that is compatible with both anode portions. The transparent anode portions may have varying thicknesses to control the thickness of the optical cavities of the pixels.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.

Abstract: Pixels in an organic light-emitting diode (OLED) display may be microcavity OLED pixels having optical cavities. The optical cavities may be defined by a partially transparent cathode layer and a reflective anode structure. The anode of the pixels may include both the reflective anode structure and a supplemental anode that is transparent and that is used to tune the thickness of the optical cavity for each pixel. Organic light-emitting diode layers may be formed over the pixels and may have a uniform thickness in each pixel in the display. Pixels may have a conductive spacer between a transparent anode portion and a reflective anode portion, without an intervening dielectric layer. The conductive spacer may be formed from a material such as titanium nitride that is compatible with both anode portions. The transparent anode portions may have varying thicknesses to control the thickness of the optical cavities of the pixels.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have a steep sidewall, a sidewall with an undercut, or a sidewall surface with a plurality of curves to disrupt continuity of the OLED layers. A control gate that is coupled to a bias voltage and covered by gate dielectric may be used to form an organic thin-film transistor that shuts the leakage current channel between adjacent anodes on the display.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.

Abstract: Pixels in an organic light-emitting diode (OLED) display may be microcavity OLED pixels having optical cavities. The optical cavities may be defined by a partially transparent cathode layer and a reflective anode structure. The anode of the pixels may include both the reflective anode structure and a supplemental anode that is transparent and that is used to tune the thickness of the optical cavity for each pixel. Organic light-emitting diode layers may be formed over the pixels and may have a uniform thickness in each pixel in the display. Pixels may have a conductive spacer between a transparent anode portion and a reflective anode portion, without an intervening dielectric layer. The conductive spacer may be formed from a material such as titanium nitride that is compatible with both anode portions. The transparent anode portions may have varying thicknesses to control the thickness of the optical cavities of the pixels.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.

Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have a steep sidewall, a sidewall with an undercut, or a sidewall surface with a plurality of curves to disrupt continuity of the OLED layers. A control gate that is coupled to a bias voltage and covered by gate dielectric may be used to form an organic thin-film transistor that shuts the leakage current channel between adjacent anodes on the display.

Abstract: A wireless communication device and methods of manufacturing and using the same are disclosed. The wireless communication device includes a substrate with an antenna and/or inductor thereon, a patterned ferrite layer overlapping the antenna and/or inductor, and a capacitor electrically connected to the antenna and/or inductor. The wireless communication device may further include an integrated circuit including a receiver configured to convert a first wireless signal to an electric signal and a transmitter configured to generate a second wireless signal, the antenna being configured to receive the first wireless signal and transmit or broadcast the second wireless signal. The patterned ferrite layer advantageously mitigates the deleterious effect of metal objects in proximity to a reader and/or transponder magnetically coupled to the antenna.

Abstract: A wireless communication device and methods of manufacturing and using the same are disclosed. The wireless communication device includes a substrate with an antenna and/or inductor thereon, a patterned ferrite layer overlapping the antenna and/or inductor, and a capacitor electrically connected to the antenna and/or inductor. The wireless communication device may further include an integrated circuit including a receiver configured to convert a first wireless signal to an electric signal and a transmitter configured to generate a second wireless signal, the antenna being configured to receive the first wireless signal and transmit or broadcast the second wireless signal. The patterned ferrite layer advantageously mitigates the deleterious effect of metal objects in proximity to a reader and/or transponder magnetically coupled to the antenna.

Abstract: A wireless communication device and methods of manufacturing and using the same are disclosed. The wireless communication device includes a substrate with an antenna and/or inductor thereon, a patterned ferrite layer overlapping the antenna and/or inductor, and a capacitor electrically connected to the antenna and/or inductor. The wireless communication device may further include an integrated circuit including a receiver configured to convert a first wireless signal to an electric signal and a transmitter configured to generate a second wireless signal, the antenna being configured to receive the first wireless signal and transmit or broadcast the second wireless signal. The patterned ferrite layer advantageously mitigates the deleterious effect of metal objects in proximity to a reader and/or transponder magnetically coupled to the antenna.

Abstract: Devices on a diffusion barrier coated metal substrates, and methods of making the same are disclosed. The devices include a metal substrate, a diffusion barrier layer on the metal substrate, one or more insulator layers on the diffusion barrier layer, and an antenna and/or inductor on the one or more insulator layer(s). The method includes forming a diffusion barrier layer on the metal substrate, forming one or more insulator layers on the diffusion barrier layer; and forming an antenna and/or inductor on an uppermost one of the insulator layer(s). The antenna and/or inductor is electrically connected to at least one of the diffusion barrier layer and/or the metal substrate. Such diffusion barrier coated substrates prevent diffusion of metal atoms from the metal substrate into device layers formed thereon.

Abstract: Devices on a diffusion barrier coated metal substrates, and methods of making the same are disclosed. The devices include a metal substrate, a diffusion barrier layer on the metal substrate, one or more insulator layers on the diffusion barrier layer, and an antenna and/or inductor on the one or more insulator layer(s). The method includes forming a diffusion barrier layer on the metal substrate, forming one or more insulator layers on the diffusion barrier layer; and forming an antenna and/or inductor on an uppermost one of the insulator layer(s). The antenna and/or inductor is electrically connected to at least one of the diffusion barrier layer and/or the metal substrate. Such diffusion barrier coated substrates prevent diffusion of metal atoms from the metal substrate into device layers formed thereon.