Abstract:
Disclosed herein is a substrate for an electronic device. The substrate has a visually imperceptible surface texture that exhibits different coefficients of friction on various input objects. In some implementations, the texture of the textured substrate is created using a gas etching process.
Abstract:
Surfaces having structured optical appearances are disclosed. The surface can include substrate, a first optical coating disposed on the substrate having a first refractive index; and a second optical coating disposed on the first optical coating having a second refractive index. The first refractive index is different than the second refractive index. Other surfaces can include a substrate having a visible surface, wherein the visible surface comprises a plurality of structural features, wherein each of the structural features is configured to transmit a light wave that optically interacts with waves of light of other structural features to create a visual appearance. Still other surfaces can include a substrate and an optical coating disposed on the substrate. The optical coating comprising particles in an ordered array within a matrix, wherein the matrix has a first refractive index and the particles have a second refractive index.
Abstract:
A sapphire structure including an ion-implanted, anti-reflective layer and a method of forming an ion-implanted, anti-reflective layer within a sapphire component is disclosed. The method includes forming an ion-implanted layer in a sapphire material at a first depth, and annealing the sapphire material to a second depth. The second depth may be greater than or equal to the first depth. The ion-implanted layer may have a first index of refraction, and the sapphire material may have a second index of refraction different from the first index of refraction.
Abstract:
A cover glass including a center region and an outer region abutting the center region at an interface. The interface inhibits crack propagation from the outer region to the center region and vice versa. In another embodiment the cover glass may include mitigation voids introduced into the cover glass to inhibit crack propagation. The interface may be formed from the mitigation voids.
Abstract:
A system and processes for heat treating sapphire components to improve strength while maintaining the optical finish and/or transparency of the component. The processes may include an annealing process that uses an inert gas to reduce potential contaminants and the presence of reactive gasses. The process may also include a multi-stage heating process that may reduce thermally induced stress within the sapphire component which may produce slip lines or other optical defects. The process may also include a series of wet ultrasonic cleaning operations that reduce potential contaminants which may cause optical defects in an annealed sapphire component. An example system, fixtures, and shields are also described, which may improve the quality of the heat-treating process.
Abstract:
A foldable display may have a display cover layer and display panel that bend around a bend axis. The display panel may have an array of pixels configured to display an image through the display cover layer. The display cover layer may be formed from a layer of glass. A recess may be formed in the layer of glass that extends along and overlaps the bend axis. The recess forms a flexible locally thinned portion in the glass that allows the display cover layer to bend. Polymer may be formed in the recess. Stiffening structures such as glass strips and glass beads of one or more diameters may be embedded in the polymer to help resist inward compression of the surface of the display cover layer in the locally thinned region while allowing the display cover layer to bend about the bend axis.
Abstract:
An electronic device includes electrical components in a housing. The components may include optical components such as a display. Protective structures may be used to protect the optical components. The protective structures may include one or more protective transparent layers such as layers of glass or crystalline material such as sapphire. The protective transparent layers may be coated with an oleophobic coating. To enhance coating durability, catalyst may be used to help bond the oleophobic coating. An adhesion promotion layer such as a silicon oxide layer may be deposited on the transparent protective layer. A catalyst layer such as a layer of sodium fluoride may be deposited on the adhesion promotion layer. The oleophobic material may be evaporated or otherwise deposited on the catalyst layer. Heat and moisture may help the oleophobic material form chemical bonds with the adhesion promotion layer, thereby forming a durable oleophobic coating.
Abstract:
An electronic device may have a housing. The device may include metal structures such as a metal member forming a portion of the housing, a portion of a strap, or other portions of the device. A gold-containing coating such as a layer of elemental gold or a gold alloy may cover the metal member to provide the metal member with a gold appearance or other desired appearance. To protect the metal member and the gold-containing coating, the metal member and gold-containing coating may be covered with a protective coating layer such as an organic protective layer. The organic protective layer may have a fluoropolymer layer with thiol coupling groups to promote adhesion to the gold-containing layer or may contain a polymer layer with silane and thiol coupling groups that serves as an adhesion promotion layer for an overlapping fluoropolymer layer with silane coupling groups.
Abstract:
A system may have a support structure and a glass layer that separate an exterior region surrounding the system from an interior region. Components may be mounted in the interior region. The components may include an optical component. The glass layer may have a first area that overlaps the optical component and that serves as an optical component window for the optical component. The glass layer may also have a second area that surrounds the first area and does not overlap the optical component. The first area may be selectively weakened relative to the second area to prevent excessive glass fracturing during a damage event from obscuring the optical component. Selective weakening may be provided with laser-induced-damage features, recesses from local thinning, and/or glass-weakening deposited thin films such as physical vapor deposition thin-film coatings of inorganic dielectric.
Abstract:
An electronic device may include electrical components and other components mounted within an interior of a housing. The device may have a display on a front face of the device and may have a glass layer that forms a housing wall on a rear face of the device. The glass housing wall may be provided with regions having different appearances. The regions may be textured, may have coatings such as thin-film interference filter coatings formed from stacks of dielectric material having alternating indices of refraction, may have metal coating layers, and/or may have ink coating layers. Textured surfaces, cavities, coatings, and other decoration may be embedded in glass structures that are joined with chemical bonds at diffusion-bonding interfaces.