摘要:
The present invention is directed to provide an etching agent for a semiconductor substrate, which is capable of etching a tungsten (W)-based metal film on a semiconductor substrate and an etching method using relevant etching agent, and relates to a liquid for preparing the etching agent for a semiconductor substrate composed of a solution comprising (A) hydrogen peroxide, (B) a phosphonic acid chelating agent having a hydroxyl group and not having nitrogen atom, (C) a basic compound, and (D-2) 0.01 to 3 % by weight of two or more kinds of anion species other than phosphonic acid chelating agents having a hydroxyl group and not having nitrogen atom, in which anion species have no oxidizing power, an etching method characterized by etching a tungsten (W)-based metal film on a semiconductor substrate using relevant etching agent for a semiconductor substrate, further, a solution comprising (B) a phosphonic acid chelating agent having a hydroxyl group and not having nitrogen atom, (C) a basic compound, and (D-2) anion species other than phosphonic acid chelating agents having a hydroxyl group and not having a hydroxyl group, in which anion species have no oxidizing power.
摘要:
PROBLEM TO BE SOLVED: To provide a temperature sensor which is hard to have high resistivity in an electrode structure for a thermistor material layer of TiAlN under high temperature environment, can be deposited directly on a film and the like without burning, and has high heat resistance and high reliability, and a method of manufacturing the same.SOLUTION: A temperature sensor includes an insulation base material 2, a thin film thermistor 3 formed on the insulation base material, and a pair of pattern electrodes 4 formed on the insulation base material so as to arrange a pair of counter electrodes 4a facing each other on the thin film thermistor. The thin film thermistor is formed of a thermistor material of TiAlN. The pattern electrode includes a joint layer 5 formed of TiN on the insulation base material, and an electrode layer 6 formed of noble metal on the joint layer.
摘要:
PROBLEM TO BE SOLVED: To provide an etching method of a semiconductor substrate which resolves a decrease in activity of an etchant due to aging and enables excellent wet etching of a Ti-containing layer; and provide manufacturing methods of a semiconductor substrate product and a semiconductor element, and etchant preparation kit.SOLUTION: In an etching method of a semiconductor substrate, when etching a Ti-containing layer of the semiconductor substrate by applying an etchant of pH 8.5-14 is to the Ti-containing layer, the etchant is prepared by mixing a first solution containing a basic compound with a second solution containing an oxidant, and after mixing, the etchant is applied to the semiconductor substrate.
摘要:
PROBLEM TO BE SOLVED: To provide an etching agent for a semiconductor substrate by which a tungsten(W)-system metal film on the semiconductor substrate can be etched, and to provide an etching method using the etching agent, and an etching agent preparation liquid.SOLUTION: An etching agent for a semiconductor substrate, on which a metal bump or a metal wire having a lower ionization tendency than that of tungsten is formed in an upper part of a tungsten(W)-system metal film, consists of a solution containing (A) hydrogen peroxide, (B) a phosphonic acid system chelate agent having a hydroxyl group, (C) a basic compound, and (D-2) 0.01 to 3 wt.% of two or more kinds of anion species selected from anion species derived from an inorganic acid, and anion species derived from an organic acid selected from a carbonate ion, a monocarboxylic acid ion, a hydroxytricarboxylic acid ion, and a hydroxycarboxylic acid ion. The etching agent is used in a method of etching the W-system metal film. An etching agent preparation liquid for a semiconductor substrate consists of a solution containing the above (B), (C), and (D-2).