Abstract: A polymethylsilsesquioxane powder according to the present invention is characterized by being surface treated with an organic silicon compound represented by the following general formula:(R.sub.3 Si)aZwherein R represents a non-substituted monovalent hydrocarbon group, a represents a numeral of 1 or 2, and Z represents a hydrogen atom, a halogen atom, a hydroxyl group, --OR', --NR'X, --ONR'.sub.2 or --OOCR' when a is 1, while --O--, --N(X) or --S-- when a is 2, wherein R' represents an alkyl group having 1 to 4 carbon atoms, and X a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.

Abstract: An Al layer (6) is first formed to cover an opening region (9) for interconnection in a semiconductor device. Then, an Al-Si-Ti layer (7) having a higher degree of hardness than that of the Al layer (6) is formed on the Al layer (6) and subsequently a mixture layer (8) of aluminum hydrate and aluminum oxide is formed on the surface of the Al-Si-Ti layer (7). Thus, a multilayered film of electrode and interconnection (11) is formed.

Abstract: An optical recording method is provided which comprises a step of irradiating light corresponding to recording information on the optical recording medium having a recording layer containing at least one selected from the group consisting of azulenium salt compounds, pyrylium dyes, diene compounds, croconic methine dyes or polymethine compounds and a diacetylene derivative compound to thereby form a pit on said recording layer.

Abstract: An electroconductive film is provided which has a first region constituted of a lamination layer comprising an electroconductive layer and an insulating layer, and a second layer having reduced or eliminated electroconductivity. Another type of electroconductive film is also provided having a first region constituted of a limination layer containing a compound having a polymerizable double bond and comprising an electroconductive layer and an insulating layer, and a second layer which is modified and having changed dissolution characteristics. The layer may be formed of a monomolecular film or monomolecular built-up film. A patterning method by use of the above electroconductive film is also provided.

Abstract: A polymerizable film is provided which comprises a transition metal and a polymerizable compound, and having a solubility in a solvent which changes through a maximum and a minimum repeatedly with an increase in energy imparted for polymerization. The polymerized film may comprise a polymerizable compound represented by the formula:R--C.tbd.C--C.tbd.C--(R.sub.1).sub.n --Xwherein R and R.sub.1 are hydrophobic sites, X is a hydrophilic site, and n is 0 or 1. This polymerizable film is useful as recording materials and resist materials.