Abstract: In a surface acoustic wave transducer having closely space-apart IDT electrode segments, a metallic oxide is selectively formed only along the marginal edge of each electrode segment so that it separates adjacent electrode segments, thereby preventing short-circuiting therebetween, permitting easy fabrication of the transducer and improving the yield rate of fabrication.

Abstract: The present invention relates to a phase shifting mask for use in a photolithographic process of forming a wiring pattern. The phase shifting mask comprises a transparent base plate (11), shading layers (12) formed selectively on the transparent base plate (11), and two kinds of phase shifting layers (13a, 13b) formed on transparent portions of the transparent base plate between the adjacent shading layers, respectively. The phase difference of the two kinds of phase shifting layers (13a, 13b) relative to the transparent base plate (11) is 90.degree., and the phase difference between the phase shifting layers is 180.degree.. The transfer of an unnecessary pattern in the shifter edge portion can be obviated by using the shading layers having a phase difference of 90.degree. relative to the transparent base plate.

Abstract: The present invention provides silicone resin-coated carrier particles used in two-component dry-process developers for electrophotographic processes. The present invention also provides a method for preparing carrier particles using a mixture of two silicone resin compositions.

Abstract: A luminescent screen assembly for a CRT is made by first coating the interior surface of a faceplate panel with a photoconductive layer which overlies a conductive layer. A multiplicity of red-, green- and blue-emitting phosphor screen elements are then deposited in color groups, in a cyclic order, onto the interior surface of the panel. A negative charge is then established on the photoconductive layer. The charge is weakened in the areas where the photoconductive layer underlies the phosphor screen elements, but unaffected in the open areas separating the phosphor screen elements. The charged, open areas of the photoconductive layer are discharged by flood illumination and reversal developed by depositing thereon particles of light-absorptive matrix material having a triboelectric charge of the same polarity as the charge established on the photoconductive layer. The novel process provides a high opacity matrix.

Abstract: A method of forming a phosphor screen in which a color filter layer is formed between a phosphor layer and an inner surface of a panel having a slurry in which a fine particle pigment and transparent particles are dispersed into a photosensitive liquid coated on the inner surface of the panel. Then, the color filter layer is formed by exposure and development. When the color filter layer that constitutes one portion of a phosphor screen of a color cathode ray tube is formed in this manner, an adhesive force with which the color filter layer is bonded onto the panel can be increased and a transmittance of the color filter layer can be improved.

Abstract: An electrophotographic light-sensitive material comprising a support having provided thereon at least one photoconductive layer containing an inorganic photoconductive substance, a spectral sensitizing dye and a binder resin, wherein the binder resin comprises at least one resin (A) and at least one resin (B) as described in the specification.

Abstract: A phase-shifting lithographic mask is fabricated, in one embodiment, by using a resist layer that is negative tone with respect to a (patterned) electron beam and is positive tone with respect to a (flood) mid-ultraviolet beam, with the tone of the electron beam predominating over that of the mid-ultraviolet beam. The resist layer is spun on a body comprising a patterned metallic layer located on a (transparent) quartz slab. The body is subjected from below to a flood mid-ultraviolet beam and from above to a patterned electron beam whose edges are located somewhere in the midst of the patterned opaque layer but are not coincident with any edges of the patterned opaque layer. Thus, a subsequent development of the resist layer removes those regions and only those regions of the resist layer upon which the ultraviolet beam was incident--i.e., not in the shadows cast by the patterned opaque layer--in the absence of incidence of the patterned electron beam.

Abstract: An electrophotographic photosensitive member comprises a light-transmissive electroconductive substrate and a photosensitive layer on said substrate, said photosensitive layer comprising a charge generating material and a charge transporting material, the number of the photoconductive carriers formed by said charge generating material and said substrate being more than the number of the photoconductive carriers formed by said charge generating material and said charge transporting material.

Abstract: A method of manufacturing a rotary halftone screen which has no slit or meshless portion by the use of galvano process including a step of exposing the roll coated with high-sensitivity photosensitive film by a multiple number of laser beams. The multiple number of laser beams are controlled by preset electric data so that desired halftone points of negative halftone image are exposed on the roll.

Abstract: A method is disclosed for manufacturing photostencils used in screening the faceplates of color cathode ray tubes. The photostencils are produced as progeny from a parent stencil photo plotted according to the dictates of a proximity photoprinting process in conjunction with the electron optical characteristics of the operational CRT. A rectangular beam is used for radiating light through the pattern of features on the parent stencil onto the photoresist of the progeny stencil. As a result, the features of the progeny stencil differ in size or shape or both, from those of the parent stencil.

Abstract: A reflection type photomask includes a substrate, and a reflecting surface formed on the substrate and including a first region and a second region which have a relative height difference. Due to the concavo-convex structure of the reflecting surface, a light reflected from the first region and a light reflected from the second region have a predetermined phase difference which may be used effectively to form a pattern on a photoresist layer.

Abstract: An electrophotographic method for image formation comprising forming an electrostatic latent image on an electrophotographic photoreceptor comprising a conductive substrate having formed thereon a photosensitive layer containing a high polymeric arylamine compound represented by formula (I): ##STR1## wherein n represents an integer of from 5 to 5000; m represents 0 or 1; y represents 1, 2, or 3; Ar represents ##STR2## wherein R represents a methyl group, an ethyl group, a propyl group, or a butyl group; Ar' represents ##STR3## wherein R is as defined above; X represents an alkylene or isoalkylene group having from 2 to 10 carbon atoms; and Z represents ##STR4## or --Ar--(W).sub.k --Ar--, wherein Ar is as defined above; W represents --CH.sub.2 --, --C(CH.sub.3).sub.

Abstract: A curable composition comprising the following components (a), (b), (c) and (d) and/or (e):(a) a compound having one carboxyl group and one (meth)acryloyl group in the molecule,(b) a compound having two or more (meth)acryloyl groups in the molecule,(c) a levelling agent, and(d) a chain transfer agent and/or(e) a tertiary amine type photoinitiator; and a process for producing a shadow mask, comprising two etching steps, wherein the above curable composition is used as a secondary etching resist material.

Abstract: A developer composition containing color toner particles, bare carrier core particles and coated carrier particles.

Abstract: An X-ray transmission film 2 of a SiN film is formed on the surface of a mask base 1. Formed on the surface of the X-ray transmission film 2 are an LSI pattern 3, and an alignment mark 4 composed of a convex portion 4a and a concave portion 4b. On the surface of the convex portion 4a is an alignment light reflection grating pattern 5 of a tungsten film. Formed on the surface of the concave portion 4b is a metal film 7 of a tungsten film.With this arrangement, a laser light beam 13 does not reach a semiconductor substrate 30 through the alignment mark 4. Thus, when detecting a first-order reflection diffracted light beam 14 from the alignment mark 4 by means of a photodetector, there is no inclusion of unwanted reflected light beams from the semiconductor substrate 30.

Abstract: A method for producing a color filter involves (A) forming a photosensitive coating film on a transparent electrically conductive layer provided on an outermost surface of a substrate having an alignment film, and exposing the photosensitive coating film to light in a first irradiation amount through a mask having a predetermined pattern of a certain light transmittance and at least once displacing the mask to another position on the photosensitive coating film and exposing the photosensitive coating film to light in a second irradiation amount different from the first irradiation amount through the mask; (B) developing and removing a photosensitive coating film portion exposed to light in one of smallest and largest irradiation amounts for exposing the transparent electrically conductive layer and electrodepositing a colored coating on the exposed electrically conductive layer for forming a colored layer thereon, operation of developing and removing the photosensitive coating film and electrodepositing the c

Abstract: The invention is for the formation of multilayer circuit boards where layers are formed sequentially using selective plating techniques and imaging of dielectric materials to achieve fine line resolution and interconnections between circuits. The invention permits the sequential formation of multilayers of higher density using imaging techniques.

Abstract: A gray level mask suitable for photolithography is constructed of a transparent glass substrate which supports plural levels of materials having different optical transmissivities. In the case of a mask employing only two of these levels, one level may be constructed of a glass made partially transmissive by substitution of silver ions in place of metal ions of alkali metal silicates employed in the construction of the glass. The second layer may be made opaque by construction of the layer of a metal such as chromium. The mask is fabricated with the aid of a photoresist structure which is etched in specific regions by photolithographic masking to enable selective etching of exposed regions of the level of materials of differing optical transmissivities. Various etches are employed for selective etching of the photoresist, the metal of one of the layers, and the glass of the other of the layers.

Abstract: A method of manufacturing improved strontium or barium ferrite carrier particles for use in two-component electrographic developer compositions for the development of electrostatic charge patterns is provided in which the tendency toward early life dusting of the strontium or barium ferrites is reduced.Such strontium or barium ferrite carrier particles are obtained by (i) mixing unreacted particles of iron oxide and barium or strontium oxide or, alternatively, a salt of barium or strontium convertible to the corresponding oxide by heat upon subsequent firing in a mole ratio of iron oxide to the metal oxide or salt of exactly 5.95 to 6.0:1 with an organic binder and a polar solvent, preferably water, to form a slurry, (ii) spray drying the slurry to obtain green beads of substantially uniform particle size and substantially spherical shape, and (iii) firing the beads at a temperature of from 1150.degree. to 1175.degree. C.

Abstract: A toner for use in electrophotography in accordance with the present invention comprises toner particles and an external additive that is constituted by a silica fine powder composed of inexpensive silica particles coated with a mixture of homogeneously distributed tin oxide and antimony, and that is attached to the surface of the toner particles. The use of the silica fine powder improves the flowability of the toner whereby images with a uniform density can be obtained. In addition, the toner is stabilized as the above mixture lowers the electric resistance on the surface of the toner particles.The above external additive may also be composed of aluminum oxide fine powder or cerium oxide fine powder.