摘要:
Disclosed are an etchant which is used for redistribution of a semiconductor substrate having an electrode and which is capable of selectively etching copper without etching nickel; and a method for manufacturing a semiconductor device using the same. Specifically disclosed are an etchant which is used for redistribution of a semiconductor substrate and which contains hydrogen peroxide and citric acid and has a content of hydrogen peroxide of from 0.75 to 12% by mass and a content of citric acid of from 1 to 20% by mass, with a molar ratio of hydrogen peroxide and citric acid being in the range of from 0.3 to 5; an etchant for selective etching of copper which is used for redistribution of a semiconductor substrate and which contains hydrogen peroxide and malic acid and has a content of hydrogen peroxide of from 0.75 to 12% by mass and a content of malic acid of from 1.5 to 25% by mass, with a molar ratio of hydrogen peroxide and malic acid being in the range of from 0.2 to 6; and a method for manufacturing a semiconductor device using such an etchant.
摘要:
Disclosed are an etchant which is used for redistribution of a semiconductor substrate having an electrode and which is capable of selectively etching copper without etching nickel; and a method for manufacturing a semiconductor device using the same. Specifically disclosed are an etchant which is used for redistribution of a semiconductor substrate and which contains hydrogen peroxide and citric acid and has a content of hydrogen peroxide of from 0.75 to 12% by mass and a content of citric acid of from 1 to 20% by mass, with a molar ratio of hydrogen peroxide and citric acid being in the range of from 0.3 to 5; an etchant for selective etching of copper which is used for redistribution of a semiconductor substrate and which contains hydrogen peroxide and malic acid and has a content of hydrogen peroxide of from 0.75 to 12% by mass and a content of malic acid of from 1.5 to 25% by mass, with a molar ratio of hydrogen peroxide and malic acid being in the range of from 0.2 to 6; and a method for manufacturing a semiconductor device using such an etchant.
摘要:
A method for preparation of 1,3-oxathiolanes is described. The method comprises reacting, in a solvent, a fluoride ion source, a carbonyl compound, and a halomethyl trimethylsilylmethyl sulfide, wherein the halomethyl trimethylsilyl methyl sulfide is selected from a group consisting of chloromethyl trimethylsilylmethyl sulfide, bromomethyl trimethylsilylmethyl sulfide, or iodomethyl trimethylsilylmethyl sulfide.
摘要:
The surface treatment agent for copper and copper alloys contains hydrogen peroxide, a mineral acid, an azole compound, silver ion and a halide ion. The surface treatment agent for copper and copper alloys is useful in the production of printed wiring boards in electronics industry. The surface treatment agent roughens the surface of copper and copper alloys. Particularly, the surface treatment agent can form a uniform and undulation-free roughened surface on copper-clad substrates having plated mirror surface, this having been difficult in conventional techniques, thereby significantly improving the adhesion to etching resists, solder resists, in addition, to prepregs and a resin for mounting electronic parts.
摘要:
A method for preparation of polycyclic 1,3-thiazolidines is described. The method comprises reacting a fluoride ion source, in a solvent, with an onium salt synthesized by the reaction of a nitrogenous heteroaromatic compound with a halomethyl trimethylsilylmethyl sulfide, the halomethyl trimethylsilylmethyl sulfide being selected from the group consisting of chloromethyl trimethylsilylmethyl sulfide, bromomethyl trimethylsilylmethyl sulfide, or iodomethyl trimethylsilylmethyl sulfide.
摘要:
Disclosed are an etchant which is used for the manufacture of a semiconductor device using a semiconductor substrate having an electrode and which is capable of selectively etching copper without etching nickel, and a method for manufacturing a semiconductor device using the same. Specifically disclosed are an etchant to be used for the manufacture of a semiconductor device using a semiconductor substrate having an electrode, including hydrogen peroxide, an organic acid, and an organic phosphonic acid, wherein the organic acid is at least one member selected from citric acid and malic acid; a content of hydrogen peroxide is from 0.75 to 12% by mass; a content of the organic acid is from 0.75 to 25% by mass; and a content of the organic phosphonic acid is from 0.0005 to 1% by mass, and a method for manufacturing a semiconductor device using the etchant.
摘要:
Disclosed are an etchant which is used for the manufacture of a semiconductor device using a semiconductor substrate having an electrode and which is capable of selectively etching copper without etching nickel, and a method for manufacturing a semiconductor device using the same. Specifically disclosed are an etchant to be used for the manufacture of a semiconductor device using a semiconductor substrate having an electrode, including hydrogen peroxide, an organic acid, and an organic phosphonic acid, wherein the organic acid is at least one member selected from citric acid and malic acid; a content of hydrogen peroxide is from 0.75 to 12% by mass; a content of the organic acid is from 0.75 to 25% by mass; and a content of the organic phosphonic acid is from 0.0005 to 1% by mass, and a method for manufacturing a semiconductor device using the etchant.
摘要:
A food-preserving agent comprising an oxygen absorbent and a compound represented by the following structural formula (I): ##STR1## , wherein n is an integer of 2 to 4 and X is H or CH.sub.3, can remove generated acetaldehyde effective, thereby preserving food without any fear of disagreeable odor for a long duration.
摘要:
The surface treatment agent for copper and copper alloys contains hydrogen peroxide, a mineral acid, an azole compound, silver ion and a halide ion. The surface treatment agent for copper and copper alloys is useful in the production of printed wiring boards in electronics industry. The surface treatment agent roughens the surface of copper and copper alloys. Particularly, the surface treatment agent can form a uniform and undulation-free roughened surface on copper-clad substrates having plated mirror surface, this having been difficult in conventional techniques, thereby significantly improving the adhesion to etching resists, solder resists, in addition, to prepregs and a resin for mounting electronic parts.
摘要:
In the process of press molding an optical element having an optical functioning face having a grating which is rotationally asymmetric, both ends of an molding face of an lower press die are cut off to form inclined faces. During a press molding, glass material filled in the cuttings presses the inclined faces so that the rotation of a lower press die in an barrel die around an axis is prevented. In addition, the part filled in the cuttings is used as the reference point to mount on an optical apparatus. As a result, the rotation of the press dies is prevented, and the placement of the rotationally asymmetric optical functioning face is avoided. Therefore, the direction for mounting the optical element on an optical apparatus can be easily decided.