Abstract:
A photochromic optical article is provided, which includes: an optical substrate; a photochromic layer over a surface of the optical substrate, wherein the photochromic layer includes a photochromic compound; and a protective layer over the photochromic layer, wherein the protective layer includes a matrix that includes residues of an ethylenically unsaturated radically polymerizable material that includes at least one allophanate group. A method of forming the photochromic optical article is also provided.
Abstract:
In the method of manufacturing a circular optical storage disc (10), an extension body (21) is present around the substrate (11) of the optical disc (10) during the spin coating of cover or spacer layers (15). The extension body (21) may consist of one or several pieces. The outer periphery (23) has a circular or polygonal shape. The inner periphery of the extension body is in close circumferential contact with the periphery (13) of the optical disc substrate (11). The surface (22) of the extension body is substantially flush with the surface (12) of the substrate (11) of the optical disc in order not to impede the flow of spin coating liquid during spin coating. The raised edge (16), which usually forms at the periphery (13) of the substrate (11) is now transferred to the outer periphery (23) of the extension body (21). After the coating operation the extension body (21) is removed. By choosing a surface (22) to which the coating (15) adheres poorly, reuse of the extension body (21) is facilitated. The manufactured optical storage disc (10) has no or a very small raised edge (16), and the method causes no extra birefringence.
Abstract:
A method and apparatus for forming a generally uniform liquid layer on an upper surface (113) of a microelectronic substrate (112). The apparatus can include a support (133) that engages less than the entire lower surface (114) of the microelectronic substrate (112) and rotates the microelectronic substrate (112) at a selected rate. A barrier (140) can extend over the upper surface (113) of the microelectronic substrate (112) and can rotate at about the same rate as the substrate (112) to separate a rotating, internal air volume (160) adjacent to the upper surface (113) and within the barrier (140) from a stationary external air volume (150) outside the barrier (140). The rotating, internal air volume (160) can reduce the likelihood for liquid/air interface disturbances that create non-uniformities in the liquid layer. Accordingly, the method and apparatus can increase the range of thicknesses to which the liquid layer can be formed and can reduce the topographical non-uniformities of the liquid layer.
Abstract:
A method of forming a circular or annular coating film on a substrate (W) using a device of simple structure without using coating liquid wastefully, comprising the steps of, using a painting device (A) formed of a rotatable table (1) suckingly holding the substrate (W) horizontally and a horizontally movable nozzle (10) liftable relative to the table (1) and having a delivery hole (10a) at the tip part thereof, rotating the table (1) and supplying coating liquid from the delivery hole (10a) in a linear state on to the substrate (W) while moving the nozzle (10) by a specified interval between the rotating center of the table (1) and an outward specified position in one direction with the nozzle (10) held at a specified height relative to the rotating table (1) so as to form a circular or annular coating film on the substrate (W).
Abstract:
The invention relates to a device for depositing a coating on a disk-like substrate (13), such as a data carrier or an electronic storage medium. Said device comprises a circular opening (9) in a distribution element (1), said opening being designed to distribute the coating medium. The device further comprises a moving device, such as a lifting device, for moving the distribution element (1) and/or the substrate (13) towards or away from each other.
Abstract:
Device for coating disks (3), particularly optically readable data carriers, with a holding device (2) for holding a disk to be coated (3), an annular nozzle unit (8) for the application of coating liquid to the disk (3) and a collection zone (7). The coating liquid is applied continuously from the nozzle unit (8) and reaches the collection zone (7) via an annular wetting zone (15), being returned from the collection zone (7) to the nozzle unit (8) via a storage tank (19). The movement unit (6) permits the disk (3) to be brought concentrically into contact with the wetting zone (15) and again removed from it. A ring (16) of coating liquid remains on the disk (3) as a result of adhesive forces. This ring (16) is uniformly distributed over the disk, for example, by means of a centrifuge. The continuous flow of coating liquid permits a constant viscosity of the coating liquid to be achieved. Those problems which can occur with straight-line application are avoided. Moreover, the design of the coating device is simple.