Abstract: A filter is formed on a substrate, such as a solid state imager, by providing successively on the substrate a layer of an absorber material, a layer of a barrier material, and a layer of a photoresist material. The photoresist is patternwise exposed and developed, thereby baring regions of the barrier layer underlying selected regions of the photoresist layer. The coated substrate is reactive ion etched under a first set of etching conditions to etch away the bared regions of the barrier layer and to bare but not substantially etch the underlying regions of the absorber layer, and then reactive ion etched under a second set of etching conditions, thereby etching away the remaining regions of the photoresist layer and the bared regions of the absorber layer, so forming a filter on the substrate. To form multi-colored filters, the process may be repeated with a different dye, or additional dyes may be deposited by other processes, such as that described in U.S. Pat. No. 4,808,501.

Abstract: A negative-working photoresist composition comprising, in admixture, (a) dye-loaded or dye-precursor-loaded polymeric particles individually covered with a layer of gelatin that is covalently bonded thereto and (b) a radiation-sensitive dichromate is useful in the preparation of continuous tone dyed imaging elements such as color filter arrays for use in solid state color image sensing devices.

Abstract: A solid state color image sensing device comprising a semiconductive support having a surface comprising an array of light sensing pixels and superimposed thereon in microregistration a color filter array having at least three sets of dyed filter elements is characterized in that at least one set of the filter elements is formed from a negative-working dyeable photoresist composition comprising, in admixture,(a) a poly(vinyl alcohol) binder,(b) a radiation-sensitive dichromate, and(c) a polymeric mordant comprising recurring units derived from a quaternized N-vinylimidazole.Color filter elements prepared from the dyeable photoresist composition have high resolution, excellent clarity and dye uptake, and low absorbance of blue light and thus are particularly useful in high quality high resolution solid state color imaging sensors having excellent thermal and light stability. A method of making the above-described device is disclosed.

Abstract: A silver diffusion transfer film unit comprising photosensitive silver halide, silver precipitating nuclei, a stabilizing compound of the formulaXS(CH.sub.2).sub.n COORwherein X is a noble metal below silver in the Electromotive Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group; and a compound of the formulaH.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.mwherein Z is hydrogen or alkyl, b is 1, 2 or 3, m=1 or 2, x=1 or 0 and y=1 or 2; when y=2, m=2 and x=0 and when y=1, m=1 and x=1.

Abstract: In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 is the same and is selected from ##STR2## R.sup.2 is alkyl, R.sup.3 is an electron-withdrawing group positioned ortho, meta or para to said N atom, R.sup.4 is hydrogen, alkyl or an electron-withdrawing group positioned ortho, meta or para to said N atom; R.sup.5 is alkyl; X is hydrogen, an electron-withdrawing group or an electron-donating group; and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds, e.g., as photographic light-screening dyes.

Abstract: A silver diffusion transfer film unit which comprises, in order, a support, a silver precipitating layer, a protective layer comprising chitosan having a copper salt and a polyol selected from the group consisting of glycerol, sorbitol, polyvinyl alcohol, inositol, ethylene glycol, propylene glycol and hydroxyethyl cellulose disposed therein, a release layer, and a photosensitive silver halide layer. In a particularly preferred embodiment, the film unit is an additive color diffusion transfer film unit.

Abstract: A silver diffusion transfer film unit which comprises, in order, a support carrying a silver precipitating layer, a protective layer comprising chitosan having a copper salt and gelatin disposed therein, a release layer and a photosensitive silver halide layer. In a particularly preferred embodiment, the film unit is an additive color diffusion transfer film unit.

Abstract: Photographic elements, multicolor filters and receivers are disclosed having supports providing microvessels for materials such as radiation-sensitive materials, imaging materials, mordants, silver precipitating agents and materials which are useful in conjunction with these materials. Processes of forming microvessels and introducing materials therein are also disclosed. Processes of forming images are disclosed employing microvessel containing elements. Image transfer processes are disclosed for producing one or a combination of silver and multicolor subtractive primary images alone or in combination with multicolor additive primary images.

Abstract: A diffusion transfer film unit comprising a support, a photosensitive silver halide emulsion layer, an image-receiving layer and, intermediate said silver halide emulsion layer and said image-receiving layer, a release layer which comprises a water-soluble polymer and a styrenated acid functional acrylic resin. In a preferred embodiment, the film unit is a silver diffusion transfer film unit.

Abstract: Photographic elements, multicolor filters and receivers are disclosed having supports providing microvessels for materials such as radiation-sensitive materials, imaging materials, mordants, silver precipitating agents and materials which are useful in conjunction with these materials. Processes of forming microvessels and introducing materials therein are also disclosed. Processes of forming images are disclosed employing microvessel containing elements. Image transfer processes are disclosed for producing one or a combination of silver and multicolor subtractive primary images alone or in combination with multicolor additive primary images.

Abstract: A stripping sheet adapted for use with a diffusion transfer film unit to remove at least the photosensitive layer from said film unit subsequent to processing is disclosed, as well as methods for using said stripping sheet, wherein said stripping sheet comprises a support, carrying in order, a water-absorbing layer, and a layer capable of conversion from substantial liquid processing composition impermeability to a condition of substantial liquid processing composition permeability.

Abstract: A processing composition adapted for use in a silver diffusion transfer process which includes a saturated polyol containing at least 3 hydroxyl groups wherein each hydroxyl group is no more than 3 carbon atoms away from another hydroxyl group.

Abstract: In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 the same or different is hydrogen or alkyl, each R.sup.2 the same or different is alkyl or phenyl, R.sup.3 is phenyl or alkyl, Y is an electron-withdrawing group and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

Abstract: A color filter array for a solid-state imaging device is disclosed. The color filter array is of the "wash-off" type wherein the individual filter elements are formed by dyeing tiny islands of a dyeable composition. As a barrier layer, the color filter array of the present disclosure uses a photocrosslinkable dye-impermeable polymer. The barrier is coated over a set of filter elements. A method of making the described solid-state device is also disclosed.

Abstract: The present invention is concerned with photographic products and processes, particularly diffusion transfer products and processes employing certain colored triarylmethane compounds possessing in their triaryl structure a 4'-oxo-1'-naphthylidene (or a 4'-oxo-1'-phenylidene) moiety, a naphthyl (or phenyl moiety) and a phenyl moiety substituted in the ortho-position to the central carbon atom with a non-nucleophilic group that cannot add to the central carbon atom but in alkaline solution undergoes an irreversible cleavage reaction with base that is complete within a predetermined time at a predetermined alkaline pH to provide a nucleophilic moiety that adds to the central carbon atom to form a ring-closed compound which is colorless.

Abstract: A novel photographic film unit, preferably a diffusion transfer film unit adapted to provide silver images of enhanced image stability which comprises photosensitive silver halide, silver precipitating nuclei and a stabilizing compound consisting of a noble metal complexed with a ligand, said ligand being adapted to hydrolyze in aqueous alkali to provide a diffusible complex of said noble metal.

Abstract: A processing composition adapted for use in a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent and a surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 repeating units of ethylene oxide per hydrophobe.

Abstract: There is described a photograhic method employing a positive-negative diffusion transfer film unit wherein there is formed a positive silver transfer image which may be viewed as a positive transparency without being separated from the developed negative silver image, including an embodiment wherein additive color projection positive images are formed. According to the method, the exposed film unit is developed by contacting the silver halide emulsion layer with a photographic processing composition which comprises an aqueous alkaline solution containing a silver halide developing agent and a silver complexing agent. The silver complexing agent is stable in an alkaline environment, has a melting point less than about 50.degree. C. preferably about 25.degree. C. or less, and the log of the stability constant (.beta.) for a 1:1 complex of the complexing agent with silver is at least about 10.5. The film unit is not washed during the method.

Abstract: In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein X is ##STR2## wherein R' is alkyl, Y is an electron-withdrawing group and n is 0 or 1. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

Abstract: In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein R' is alkyl; Y is an electron-withdrawing group and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

Abstract: A receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising gelatin, polyvinyl alcohol and noble metal silver-precipitating nuclei; wherein said nuclei are present in a level of from about 0.1-0.4 mgs/ft.sup.2, gelatin is present at a level of from about 0.05 to 1.5 mgs/ft.sup.2 and polyvinyl alcohol is present at a level of about 0.1 to 5 mgs/ft.sup.2. Preferably, the noble metal is palladium. The receiving element is particularly useful in an additive color diffusion transfer process.