Silver electroplating solution
AssigneeShinko Electric Industries Co., Ltd.
InventorsYoko Ogihara, Shinichi Wakabayashi, Masao Nakazawa
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Abstract
A silver electroplating solution containing a cyanide as a silver source, said silver electroplating solution characterized by containing at least one type of compound of As, Tl, Se, and Te as a brightener and a brightness adjuster having a benzothiazole skeleton or benzoxazole skeleton. This plating solution utilizes the high speed property of gloss agents to the maximum, does not have an effect on the current density, gives stable non- or semi-gloss plating appearance, and facilitates control.
Claims14
A silver electroplating solution comprising:
- a cyanide as a silver source;
- at least one compound of As (arsenic), Tl (thallium), Se (selenium), or Te (tellurium) as a brightener;
- and
- a brightness adjuster for suppression of brightness having a benzothiazole skeleton,
- wherein the brightness adjuster for suppression of brightness has the formula
- wherein
- R is H, CH3, or CH3O,
- T is H,
- V is H or SO3Na,
- Y is H or CH3,
- X is one of the following a to i
A silver electroplating solution comprising:
- a cyanide as a silver source;
- at least one compound of As (arsenic), Tl (thallium), Se (selenium), or Te (tellurium) as a brightener;
- and
- a brightness adjuster for suppression of brightness having a benzoxazole skeleton,
- wherein the brightness adjuster for suppression of brightness has the formula
- wherein
- X is —CH2CH2CH2CH2SO3Na,
- Y is one of the following a to b
A silver electroplating solution comprising:
- a cyanide as a silver source;
- at least one compound of As (arsenic), Tl (thallium), Se (selenium), or Te (tellurium) as a brightener;
- and
- a brightness adjuster for keeping down a brightness degree having the formula
- wherein
- R is H, CH3, or CH3O,
- T is H,
- V is H or SO3Na,
- Y is H or CH3,
- X is one of the following a to i
A silver electroplating solution comprising:
- a cyanide as a silver source;
- at least one compound of As (arsenic), Tl (thallium), Se (selenium), or Te (tellurium) as a brightener;
- and
- a brightness adjuster for keeping down a brightness degree having the formula
- wherein
- X is —CH2CH2CH2SO3Na,
- Y is one of the following a to b
Dependencies are inferred from the claim text.