Abstract:
Organic compositions of conductive polymers are provided. The compositions have at least one polymer selected from polypyrrole, polythiophene, or combinations and at least one colloid-forming polymeric acid dispersed in a liquid medium that is at least 60% by weight at least one organic liquid. Also provided is a method of making such compositions.
Abstract:
Security documents often incorporate optically variable devices to prevent or hinder counterfeiters. Disclosed herein are layered optically variable devices such as color-shift foils, and methods for their production and use. Such devices afford new techniques for a user of a security document to check quickly and easily whether the security document is a legitimate document or a counterfeit copy.
Abstract:
A security device for authenticating bank notes, documents and other items, comprises a luminescent material for producing luminescent radiation of first and second wavelengths. The security device includes an optically variable structure for controlling emission of luminescent radiation of at least one of the first and second wavelengths from the security device, the security device being arranged to permit, from an area of the optically variable structure, emission of luminescence of the first and second wavelengths from the security device. The optically variable structure causes the relative emissivity of the security device for luminescent radiation of the first and second wavelengths to change with a change m emission angle, so that the security device produces an angle-dependent color shift m the emitted luminescent radiation. The optically variable structure may comprise an optical interference stack that controls transmission of luminescent radiation therethrough in response to the wavelength of luminescent radiation.
Abstract:
This invention relates to a process for forming a continuous pattern on a substrate with a liquid media. Upon the deposition of the liquid media on the substrate, a portion the continuous pattern is evaporated upon contact with the substrate.
Abstract:
An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.
Abstract:
An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.
Abstract:
An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.
Abstract:
A process for forming an electronic device includes forming a first layer over a substrate and placing a first liquid composition over a first portion of the first layer. The first liquid composition includes at least a first guest material and a first liquid medium. The first liquid composition comes in contact with the first layer and a substantial amount of the first guest material intermixes with the first layer. An electronic device includes a substrate and a continuous first layer overlying the substrate. The continuous layer includes a first portion in which an electronic component lies and a second portion where no electronic component lies. The first portion is at least 30 nm thick and includes a first guest material, and the second portion is no more than 40 nm thick.
Abstract:
An electronic device is provided that includes an organic panel, including a platform made of an electrically nonconductive material; a first electrode on the platform; an organic active layer on the first electrode; a second electrode on the organic active layer; and a first alignment structure, in addition, a driver panel is provided and includes a substrate; a driver circuit formed on the substrate; and a second alignment structure for coupling with the first alignment structure to position the organic panel and driver panel in substantial alignment, and to electrically couple the driver circuit to the organic active layer.
Abstract:
A security device for authenticating bank notes, documents and other items, comprises a luminescent material for producing luminescent radiation of first and second wavelengths. The security device includes an optically variable structure for controlling emission of luminescent radiation of at least one of the first and second wavelengths from the security device, the security device being arranged to permit, from an area of the optically variable structure, emission of luminescence of the first and second wavelengths from the security device. The optically variable structure causes the relative emissivity of the security device for luminescent radiation of the first and second wavelengths to change with a change m emission angle, so that the security device produces an angle-dependent colour shift m the emitted luminescent radiation. The optically variable structure may comprise an optical interference stack that controls transmission of luminescent radiation therethrough in response to the wavelength of luminescent radiation.