Kao Corporation

Nippon Steel Corporation

Kozo Kitazawa

Eiji Kashihara

Akimitsu Sakai

Eiji Nagoshi

Hiroyuki Nagamori

Yuzo Yamamoto

Atsushi Tamura

Shogo Nomoto

Mami Shirota

Norio Anzawa

Hisashi Yazaki

Kozi Adachi

Naoki Watanabe

Shougo Nomoto

Shuichi Miyabe

A resist developer obtained by a process comprising mixing (1) at least one compound selected from the group consisting of a basic compound A and an organic compound B having phenolic hydroxyl group and carboxyl group in a molecule, and/or (2) a salt C formed between the basic compound A and the organic compound B. The resist developer exhibiting excellent dissolution selectivity, and developing a resist in a short period of time, can be used for developing positive and negative resists.

Resist developer

A resist developer comprising (1) a basic organic compound A and (2) a salt C of (a) a basic compound A&prime; and (b) an organic compound B capable of forming a salt together with said basic compound A&prime;, wherein said basic compound A&prime; is the same or different from said basic organic compound A, and wherein said resist developer is prepared by combining (1) and (2), or by reacting an excess amount of said basic organic compound A with said organic compound B.

A stripping composition for a resist comprising a polycarboxylic acid and/or a salt thereof, and water, wherein a pH of the stripping composition is less than 8; and a stripping composition for a resist comprising 0.01 to 90% by weight of an organic acid and/or a salt thereof, 2 to 74% by weight of water, and 0.5 to 90% by weight of an organic solvent, wherein a pH of the stripping composition is less than 8; and a method of stripping a resist from a substrate, comprising applying one of the stripping composition to the substrate.

Stripping composition for resist

The anti-corrosive draining agent for use in a rinsing process includes a polyoxyalkylene alkyl ether as an essential component. The anti-corrosive draining agent further includes an amine compound as an essential component, wherein the polyoxyalkylene alkyl ether (a) and the amine compound (b) are contained in a blending weight ratio (a/b) of from 99/1 to 80/20. The rinsing process using water following a cleaning process, includes the steps of adding the above anti-corrosive draining agent to a rinsing water, and rinsing an object in the rinsing water.

Anti-corrosive draining agent and rinsing process

Cleaning process

The process for cleaning a cleaning object includes the steps of forming a water phase and an oil phase in a vessel of a cleaning apparatus, the water phase having a lower content of organic substances in a detergent than the oil phase, and cleaning the cleaning object in the water phase.

Cleaning process and detergent used therefor

Disclosed is a process for cleaning electronic parts or precision parts which comprises the steps of: washing the parts with a cleaning agent composition, rinsing the washed parts with water having a temperature of from 5.degree. to 100.degree. C., and maintaining the rinsing waste water at a temperature of 20.degree. C. or higher to effect separation of organic substances. The cleaning agent composition contains, as active cleaning components, a nonionic surface active agent and a compound selected from the group consisting of hydrocarbon compounds and slightly water soluble alkyl esters or alkyl ketones. The composition is such that 50% by weight or more of the organic substances separate from the water phase when the composition is made into an aqueous solution having an organic substance content of 5% by weight adjusted by diluting it with water or by evaporating water from it and the resulting cleaning agent aqueous solution is subsequently allowed to stand still for 30 minutes at a temperature of from 20.degree. to 100.degree. C. According to the present invention, organic substances in rinsing waste water can be separated and removed efficiently, and subsequent waste water treatment step can be simplified. The process is economically advantageous, because the rinsing waste water after the separation treatment can be used again as a rinsing liquid.

Process for cleaning electronic parts or precision parts

A detergent composition which can effectively cleanse electronic and precision parts and produces waste effluent water which is very easily treated is disclosed. The detergent composition comprises one or more nonionic surface active agents and, when diluted with water to a concentration of 5%, the aqueous solution has a cloud point of 5.degree.-100.degree. C. Disclosed is also a process for cleansing electronic and precision parts comprising the steps 1) to 3): 1) cleaning the electronic and precision parts with a detergent composition comprising one or more nonionic surface active agents and wherein a 5% by weight of aqueous solution of said detergent composition has a cloud point of 5.degree.-100.degree. C., or with an aqueous solution of this detergent composition, at a temperature below said cloud point, 2) rinsing the electronic and precision parts with a rinse water resulted in step 1) at a temperature of 5.degree.-100.degree. C., and 3) heating the rinse waste water to a temperature above its cloud point; thereby separating the oil components contained therein.

Process for cleaning electronic or precision parts and recycling rinse

Method of heat treatment of rolled steel material using foams

An electroplated composite coating of the invention which comprises 70 to 99.9 percent by weight of zinc or an alloy of zinc and 0.1 to 30 percent by weight of an organic polymer,

Growing community of inventors

Wakayama, Japan

Kozo Kitazawa