Abstract:
The present invention includes a radiation-imageable element for lithographic printing having a hydrophilic anodized aluminum base with a surface having pores and a image-forming layer having polymer particles coated on the aluminum base. The ratio of the average pore diameter to the average particle diameter is from 0.4:1 to 10:1. The present invention further includes a method of producing the imaged element. The method includes the steps of imagewise exposing the radiation-imageable element to radiation to produce exposed and unexposed regions and contacting the imagewise exposed radiation-imageable element and a developer to remove the exposed or the unexposed regions.
Abstract:
Photocurable, conductive, and transparent polymer coating compositions and methods of using the same are provided. The compositions include a photopolymer and an electrically conductive polymer dissolved or dispersed in a solvent system. Preferred photopolymers include water-miscible, multifunctional acrylates. Preferred electrically conductive polymers include poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate) (PEDOT-PSS). The compositions preferably also contain a photoinitiator and may contain a water-immiscible acrylate and/or a surfactant. The compositions are applied to substrates and exposed to actinic radiation such as ultraviolet (UV) light to form a cured, durable, conductive, and transparent coating.
Abstract:
The present invention relates to a negative-working radiation imageable lithographic printing plate precursor, preferably having only two polymeric layers on a support. The first (bottom) layer is composed of oleophilic polymers and a photothermal converter which converts radiation to heat. The second polymeric layer (top) is composed of crosslinked hydrophilic polymers which absorb aqueous fountain solution and repel ink. The oleophilic polymers in the first layer contain functional groups are interlayer chemically bonded to the hydrophilic polymer in the second layer to provide interlayer adhesive bonding between the two layers. The plate is imagewise exposed to radiation, such as with an IR laser, resulting in non-ablative adhesion-weakening between the two layers so that the plate can be developed by fountain solution and/or ink on press whereby the top layer in the exposed area is removed on the press to reveal the ink-receptive image area. The top layer in the unexposed area remains as the non-image area.
Abstract:
Presensitized lithographic plates are prepared which permit direct formation of printable images on plates by digital computerization without the intervening formation of a photographic image with a quality that allows the plates to be used for high volume printing applications. The lithographic printing plate has a structure which contains a substrate; a positive or negative working photosensitive layer; and a thermally sensitive masking layer which is opaque to the actinic radiation but which is soluble in an aqueous medium. The masking layer contains a heat softenable disperse phase which is insoluble in the aqueous medium; a polymeric continuous phase which is soluble or swellable in the aqueous medium; and a colorant which strongly absorbs radiant energy and converts the radiant energy to heat. In use the masking layer is digitally exposed to a computer controlled laser image so that exposed image areas of the masking are insolublized in the aqueous medium; soluble areas of the mask layer are then removed to form an opaque image mask on the photosensitive layer which is then exposed to actinic radiation passing through the mask to solubilize or insolubilize exposed areas of the photosensitive layer; the photosensitive layer is then developed with the developer liquid to remove the soluble areas and any overlying mask areas to form the lithographic printing plate. Both wet and waterless lithographic printing plates may be digitally prepared in this manner.
Abstract:
A cleaning composition for removing temporary wafer bonding material is provided. The cleaning composition comprises an alkylarylsulfonic acid and an aliphatic alcohol dispersed or dissolved in a hydrocarbon solvent system. Methods of separating bonded substrates and cleaning debonded substrates using the cleaning composition are also provided. The invention is particularly useful for temporary bonding materials and adhesives. The methods generally comprise contacting the bonding material with the cleaning solution for time periods sufficient to dissolve the desired amount of bonding material for separation and/or cleaning of the substrates.
Abstract:
New photoresists for use during the production of semiconductor and MEMS devices are provided. The primer layer preferably comprises a silane dissolved or dispersed in a solvent system. The photoresist layer includes copolymers prepared from styrene, acrylonitrile, and epoxy-containing monomers. The photoresist layer comprises a photoacid generator, and is preferably negative-acting.
Abstract:
There is provided a composition that can effectively remove a protective coating and a primer coating that have a resistance to etching solutions and are rendered unnecessary after wet-etching treatment in MEMS fabrication processes, and a method for removing the protective layer. The composition contains (A) at least one organic solvent selected from the group consisting of amides, lactones, pyrrolidones and ketones, (B) water, and (C) a fluoride, in an amount of 80.00 to 99.90 mass %, 0.05 to 12.00 mass %, and 0.05 to 8.00 mass %, respectively. The composition may further contain (D) phosphoric acid, phosphonic acid or phosphinic acid in an amount over 0 mass part to 5.5 mass parts, or (E) an organic amine in an amount over 0 mass part to 45 mass parts, based on 100 mass parts of the composition.
Abstract:
New photoresists for use during the production of semiconductor and MEMS devices are provided. The primer layer preferably comprises a silane dissolved or dispersed in a solvent system. The photoresist layer includes a first polymer prepared from a styrene and an acrylonitrile, and a second polymer comprising epoxy-containing monomers (and preferably phenolic-containing monomers). The photoresist layer comprises a photoacid generator, and is preferably negative-acting.
Abstract:
QHB-Modified free radical polymerizable compounds and free radical polymerizable compositions that comprise these compounds are disclosed. A QBH-modified free radical polymerizable compound has at least one moiety that comprises at least one free radical polymerizable group; a supporting backbone, and at least one and preferably at least two moieties capable of forming four or more, typically four, hydrogen bonds with similar or complementary units on other molecules or portions of molecules. Free radical polymerizable compositions that contain these compounds may be used in any of the well-known applications for free radical polymerizable compositions. They are especially useful for the formation of imageable elements useful as lithographic printing plate precursors.
Abstract:
The present invention provides an imageable element, which includes: a substrate; a crosslinked layer disposed on the substrate; and an imageable ink-receptive layer disposed on the crosslinked layer, the imageable ink-receptive layer including an ablation free imageable composition. The present invention provides methods of producing the above imaged element.