IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0716260
(1985-03-26)
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발명자
/ 주소 |
- Opaskar Vince (Cleveland Hts. OH) Canaris Valerie (Parma OH) Willis William J. (North Royalton OH)
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출원인 / 주소 |
- McGean-Rohco, Inc. (Cleveland OH 02)
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인용정보 |
피인용 횟수 :
25 인용 특허 :
3 |
초록
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An aqueous acidic plating bath for electrodeposition of tin, lead or tin-lead alloys on a substrate is described. The plating baths are free of fluoborate and comprise (a) at least one bath-soluble metal salt selected from the group consisting of a stannous salt, a lead salt, or a mixture of stannou
An aqueous acidic plating bath for electrodeposition of tin, lead or tin-lead alloys on a substrate is described. The plating baths are free of fluoborate and comprise (a) at least one bath-soluble metal salt selected from the group consisting of a stannous salt, a lead salt, or a mixture of stannous and lead salts, (b) at least one alkane sulfonic acid or alkanolsulfonic acid, (c) at least one nonionic, cationic or amphoteric surfactant, (d) an effective amount of at least one primary brightening agent selected from the group consisting of aromatic aldehydes, acetophenones, and carbonyl compounds having the general formula Ar-C(H)〓C(H)-C(O)-CH3 (III) wherein Ar is a phenyl, naphthyl, pyridyl, thiophenyl or furyl group, and (e) an effective amount of a secondary brightening agent selected from the group consisting of lower aliphatic aldehydes and substituted olefins of the formula [Figure] (IV) wherein R1 is a carboxy, carboxamide, alkali metal carboxylate, ammonium carboxylate, amine carboxylate or allyl carboxylate, and R2, R3 an R4 are each independently hydrogen or lower alkyl groups. Methods for the electrodeposition of tin, lead, or tin-lead alloys from such baths also are described.
대표청구항
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An aqueous tin, lead, or tin-lead alloy plating bath free of fluoride and fluoborates comprising (A) at least one bath-soluble metal salt selected from the group consisting of a stannous salt, a lead salt, or a mixture of stannous and lead salts, (B) at least one alkane sulfonic acid or alkanol sulf
An aqueous tin, lead, or tin-lead alloy plating bath free of fluoride and fluoborates comprising (A) at least one bath-soluble metal salt selected from the group consisting of a stannous salt, a lead salt, or a mixture of stannous and lead salts, (B) at least one alkane sulfonic acid or alkanol sulfonic acid, (C) at least one nonionic, cationic or amphoteric surfactant, (D) an effective amount of at least one primary brightening agent selected from the group consisting of aromatic aldehydes, acetophenones, and carbonyl compounds having the general formula Ar-C(H)〓C(H)-C(O)-CH3 (III) wherein Ar is a phenyl, naphthyl, pyridyl, thiophenyl or furyl group, and (E) an effective amount of a secondary brightening agent selected from the group consisting of lower aliphatic aldehydes and substituted olefins of the formula [Figure] (IV) wherein R1 is a carboxy, carboxamide, alkali metal carboxylate, ammonium carboxylate, amine carboxylate or allyl carboxylate, and R2, R3 and R4 are each independently hydrogen or lower alkyl groups.
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