Photosensitive members and a process for forming patterns using the same

An image forming method comprising image-wise exposing with actinic radiation a positive-working and negative-working photosensitive member comprising a photosensitive layer and a support, said photosensitive layer containing an o-benzo- or o-naptho-quinonediazide sulfonic acid ester of a hydroxy compound as a photosensitive agent and an additive selected from a quinone or an aromatic ketone compound, heating said member at about 70.degree. to 300.degree. C. concurrent with or subsequent to exposure to insolubilize the exposed areas, post-exposing said member to actinic radiation to render unexposed areas removable upon development and developing said member with a common alkaline developer to remove unexposed areas, and wherein said quinone compound is selected from the group consisting of anthraquinone, 1-methylanthraquinone, 2-methylanthraquinone, 2-t-butylanthraquinone, 1-acetylamino-4-nitroanthraquinone, 1,2-benzanthraquinone, 2,3-triazoylanthraquinone, phenanthraquinone, 1-methylphenanthraquinone, and benzphenanthraquinone, and wherein said aromatic ketone compound is selected from the group consisting of perinaphthenone, xanthone, thioxanthone, benzanthrone, 3-chlorobenzanthrone, naphthofuranone, 4-phenylnaphthofuranone, indenone, 2,3-diphenylindenone, benzophenone, and benzalacetophenone.