摘要:
Disclosed is an electroless palladium plating bath containing a palladium compound, at least one complexing agent selected from ammonia and amine compounds, at least one reducing agent selected from phosphinic acid and phosphinates, and at least one unsaturated carboxylic acid compound selected from unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, unsaturated carboxylates and unsaturated carboxylic acid derivatives. Such an electroless palladium plating bath has high bath stability, and decomposition of the bath hardly occurs. Consequently, the electroless palladium plating bath of the present invention has a longer bath life than conventional electroless palladium plating baths. In addition, this electroless palladium plating bath enables to obtain excellent solder bonding characteristics and wire bonding characteristics since it does not affect plating film characteristics even when it is used for a long time.
摘要:
Part or whole of an electroless gold plating film of a plated film laminate including an electroless nickel plating film, an electroless palladium plating film and an electroless gold plating film is formed by an electroless gold plating using an electroless gold plating bath including a water-soluble gold compound, a complexing agent, formaldehyde and/or a formaldehyde-bisulfite adduct, and an amine compound represented by the following general formula R1—NH—C2H4—NH—R2 or R3—(CH2—NH—C2H4—NH—CH2)n—R4. The method of the invention does not need two types of baths, a flash gold plating bath and a thick gold plating bath for thickening. Gold plating films of different thicknesses suited for solder bonding or wire bonding can be formed using only one type of gold plating bath.
摘要:
Disclosed is an electroless palladium plating bath containing a palladium compound, at least one complexing agent selected from ammonia and amine compounds, at least one reducing agent selected from phosphinic acid and phosphinates, and at least one unsaturated carboxylic acid compound selected from unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, unsaturated carboxylates and unsaturated carboxylic acid derivatives. Such an electroless palladium plating bath has high bath stability, and decomposition of the bath hardly occurs. Consequently, the electroless palladium plating bath of the present invention has a longer bath life than conventional electroless palladium plating baths. In addition, this electroless palladium plating bath enables to obtain excellent solder bonding characteristics and wire bonding characteristics since it does not affect plating film characteristics even when it is used for a long time.
摘要:
Part or whole of an electroless gold plating film of a plated film laminate including an electroless nickel plating film, an electroless palladium plating film and an electroless gold plating film is formed by an electroless gold plating using an electroless gold plating bath including a water-soluble gold compound, a completing agent, formaldehyde and/or a formaldehyde-bisulfite adduct, and an amine compound represented by the following general formula R1—NH—C2H4—NH—R2 or R3—(CH2—NH—C2H4—NH—CH2)n—R4. The method of the invention does not need two types of baths, a flash gold plating bath and a thick gold plating bath for thickening. Gold plating films of different thicknesses suited for solder bonding or wire bonding can be formed using only one type of gold plating bath. Especially, an electroless gold plating film having a thickness of not smaller than 0.15 μm can be efficiently, effectively formed by use of one plating bath in one step, thereby enabling the process to be simplified along with an attendant advantage in cost.
摘要:
An electroless gold plating bath includes a water-soluble gold compound, a complexing agent, a formaldehyde metabisulfite adduct, and an amine compound represented by R1—NH—C2H4—NH—R2 or (CH2—NH—C2H4—NH—CH2)n—R4 (wherein R1 to R4 represent —OH, —CH3, —CH2OH, —C2H4OH, —CH2N(CH3)2, —CH2NH(CH2OH), —CH2NH(C2H4OH), —C2H4NH(CH2OH), —C2H4NH(C2H4OH), —CH2N(CH2OH)2, —CH2N(C2H4OH)2, —C2H4N(CH2OH)2 or —C2H4N(C2H4OH)2, and n is an integer of 1 to 4). A gold plated coating of a good appearance can be formed without causing a failure in appearance owing to the progress of intergranular corrosion in a nickel surface.
摘要翻译:化学镀金浴包括水溶性金化合物,络合剂,偏亚硫酸氢甲酯加成物和由R1-NH-C2H4-NH-R2或(CH2-NH-C2H4-NH-CH2)n表示的胺化合物 -R4(其中R1至R4表示-OH,-CH3,-CH2OH,-C2H4OH,-CH2N(CH3)2,-CH2NH(CH2OH),-CH2NH(C2H4OH),-C2H4NH(CH2OH),-C2H4NH(C2H4OH) ,-CH 2 N(CH 2 OH)2,-CH 2 N(C 2 H 4 OH)2,-C 2 H 4 N(CH 2 OH)2或-C 2 H 4 N(C 2 H 4 OH)2,n为1〜4的整数)。 可以形成良好外观的镀金涂层,而不会由于镍表面的晶间腐蚀的进行而导致外观不良。
摘要:
An electroless gold plating bath includes a water-soluble gold compound, a complexing agent, a formaldehyde metabisulfite adduct, and an amine compound represented by R1—NH—C2H4—NH—R2 or (CH2—NH—C2H4—NH—CH2)n—R4 (wherein R1 to R4 represent —OH, —CH3, —CH2OH, —C2H4OH, —CH2N(CH3)2, —CH2NH(CH2OH), —CH2NH(C2H4OH), —C2H4NH(CH2OH), —C2H4NH(C2H4OH), —CH2N(CH2OH)2, —CH2N(C2H4OH)2, —C2H4N(CH2OH)2 or —C2H4N(C2H4OH)2, and n is an integer of 1 to 4).A gold plated coating of a good appearance can be formed without causing a failure in appearance owing to the progress of intergranular corrosion in a nickel surface.
摘要翻译:无电镀金浴包括水溶性金化合物,络合剂,偏亚硫酸氢甲酯加成物和由R 1 -NH-C 2 H表示的胺化合物 4-NH-R 2或(CH 2 -NH-C 2 H 4) (其中R 1至R 4)其中R 1至R 4(其中R 1至R 4) -CH 3,-OH,-CH 2,-SO 2 H,CH 2 CH 2, OH,-CH 2 N(CH 3)2 - , - CH 2 NH(CH 2) OH),-CH 2 NH(C 2 H 4 OH),-C 2 - H 2 NH(CH 2 OH),-C 2 H 4 NH(C 2 H 2) H 2 OH,-CH 2 N(CH 2 OH)2,-CH 2, N 2 C 2 H 2 H 2,H 2 H 2, N 2(CH 2 OH)2或-C 2 H 4 H(N) C 2 H 4 OH)2,n为1〜4的整数。 可以形成良好外观的镀金涂层,而不会由于镍表面的晶间腐蚀的进行而导致外观不良。