Abstract:
PROBLEM TO BE SOLVED: To provide a water-based sealing agent solution which does not contain organic solvents causing environmental pollution, is capable of carrying out a treatment without energization so as to respond to the treatment of a recent device with a small size and a high density, and is capable of carrying out the sealing treatment selectively and quantitatively to parts to be treated; and to provide a sealing method using the same.SOLUTION: The sealing agent solution for plating materials of noble metals or noble metal alloys includes: a nitrogen-containing five-membered cyclic compound having a mercapto group and not containing a benzene ring, as a first component; a linear alkane thiol having a carbon number of 10 or more and 20 or less, as a second component; and a nonionic surfactant, as a third component.
Abstract:
PROBLEM TO BE SOLVED: To obtain a new molten salt by regarding DNA as a high- concentration nucleic acid base assembly and converting the DNA into an onium salt. SOLUTION: This molten salt is obtainable by converting the DNA or a nucleic acid base by reacting with a certain kind of organic acid or an alkylating agent or the like into an onium salt. The molten salt has excellent performances as an electrolyte to the served for an ionics material.
Abstract:
PROBLEM TO BE SOLVED: To provide a plating bath which can enhance the uniformity and the like of a plated film in a wide range of current density, impart an adequate appearance and soldering characteristics to the plated film, and prevent the aggregation among electroconductive media and among articles to be plated, in a barrel-plating process. SOLUTION: A bath for tin or tin-alloy plating includes: (A) a soluble salt formed of either a stannous salt or a mixture of the stannous salt and a salt of a metal selected from the group consisting of silver, copper, bismuth, indium, zinc, antimony, nickel and lead; (B) an acid or a salt thereof; and (C) a dibenzazole disulfide sulfonate compound specifically such as dibenzothiazolyl disulphide disodium disulfonate. Because of including the compound (C), the plating bath can enhance the uniformity and smoothness of the film in the wide range of the current density, impart the superior appearance and soldering characteristics to the film, and prevent the aggregation among the electroconductive media, when having applied to a barrel-plating process. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To impart satisfactory film appearance stably with lapse of time to a grain refining agent of a film crystal to be added to a tin or tin alloy plating bath. SOLUTION: The tin or tin alloy plating bath includes (A) a stannous salt or a soluble salt comprised of a mixture composed of the stannous salt and a salt of a metal (for example, silver, copper, bismuth, etc.) selected from the groups VIII, IB, IIB, IIIA, IVA, VA from the fourth to the sixth period, (B) an acid or its salt, (C) a specific 2-mercaptobenzoazole derivative bonded with 3-6C alkylene with a mercapto group on the position 2 of benzoazole ring. Oxidation or cleavage is made to hardly arise by bonding of the 3-6C alkylene, and therefore, even if plating work progresses, the grain refining function lasts without declining, and the satisfactory film appearance can be of obtained stably with lapse of time. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To develop and provide a post-treatment agent for plating, which improves fusion-joining resistance more effectively than sodium phosphate treatment solution. SOLUTION: A composition of the post-treatment agent for plating to improve fusion-joining resistance is a solution which includes one or more selected from among compounds having amino nitrogen having at least two methylene groups coupled with a phosphonic acid group; and has a pH adjusted to an acidic region of 7 or lower. The solution also includes one or more compounds selected from among: a heterocyclic nitrogen-containing compound or a salt thereof; an aliphatic amine or an aromatic amine; and a C6-C24 straight-chain or branched-chain aliphatic carboxylic acid, or a salt of the carboxylic acid and the above amine. The composition can extremely effectively improve the fusion joinability of a plating film surface of tin or a tin alloy. COPYRIGHT: (C)2007,JPO&INPIT