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Electrolytically silver plated and/or electrolytically silver alloy plated article having oxide layer on surface

A technology of electroplating silver and oxide layer, applied in the plating of superimposed layers, electrical components, coatings, etc., can solve the problem of not carrying out effective technical development, and achieve high productivity, high reflectivity, and excellent sulfidation resistance. Effect

Inactive Publication Date: 2012-05-23
JX METALS TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, effective technical development has not yet been carried out to improve the light reflection performance of the silver film, especially the reduction in the light reflection performance caused by discoloration in an atmosphere containing sulfur, especially when it is useful as a white light source. Utilization facilitation is eager for such improvements

Method used

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  • Electrolytically silver plated and/or electrolytically silver alloy plated article having oxide layer on surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative example 1

[0045] Silver plating was performed on copper substrates under the following silver plating baths and plating conditions.

[0046] silver plating bath

[0047] Ag: 2.5g / L (using potassium silver cyanide as Ag)

[0048] KCN: 5g / L

[0049] Plating temperature: 25°C

[0050] Plating area: 0.1dm 2 (25mm×20mm)

[0051] Parts to be plated: copper plate

[0052] Current density: 2A / dm 2

[0053] Next, in Example 1, oxidation treatment was performed under the conditions described in Table 1 as follows, and after the oxidation treatment, the film thickness and reflectance of the oxide layer were measured before and after sulfur treatment. In addition, in Comparative Example 1, oxidation treatment was not performed, and the film thickness and reflectance of the oxide layer were measured before and after sulfur treatment.

[0054] In addition, the film thickness of the silver plating film and / or silver alloy plating film is obtained by fluorescent X-ray analysis.

[0055] The re...

Embodiment 2～3、 comparative example 2

[0067] On the basis of Example 1, instead of electroplating silver, the following silver alloy plating bath and plating conditions were used, and the oxidation treatment temperature was set to the temperature listed in Table 1, except that it was plated in the same manner as in Example 1 to obtain The plated materials of Example 2 and Example 3 were evaluated in the same manner as in Example 1.

[0068] In addition, on the basis of comparative example 1, instead of electroplating silver, utilize the following silver alloy plating bath and plating conditions to carry out silver plating alloy, obtain the plated part of comparative example 2 in the same way as comparative example 1 except this, and comparative example 1 Evaluate in the same way.

[0069] Silver-Palladium Plating Bath

[0070] Ag: 2.5g / L (using potassium silver cyanide as Ag)

[0071] Pd: 5.0g / L (using potassium palladium cyanide)

[0072] KCN: 5g / L

[0073] Plating temperature: 25°C

[0074] Plating area: 0....

Embodiment 4、 comparative example 3

[0079] On the basis of Example 1, instead of electroplating silver, the following silver alloy plating bath and plating conditions were used, and the oxidation treatment temperature was set to the temperature listed in Table 1, except that it was plated in the same manner as in Example 1 to obtain The plated material of Example 4 was evaluated in the same manner as in Example 1.

[0080] In addition, on the basis of comparative example 1, instead of electroplating silver, utilize the following silver alloy plating bath and plating conditions to carry out silver alloy plating, obtain the plated part of comparative example 3 in the same way as comparative example 1 except this, and comparative example 1 was evaluated in the same manner.

[0081] Silver-ruthenium plating bath

[0082] Ag: 2.5g / L (using potassium silver cyanide as Ag)

[0083] Ru: 5.0g / L (using potassium ruthenium cyanide)

[0084] KCN: 5g / L

[0085] Plating temperature: 25°C

[0086] Plating area: 0.1dm 2 (...

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Abstract

Disclosed is a silver plated or silver alloy plated article which has high productivity, high reflectance in the visible light range and excellent sulfuration resistance. Specifically disclosed is an electrolytically silver plated and / or electrolytically silver alloy plated article having an oxide layer on the surface, which is characterized in that a silver plating layer and / or a silver alloy plating layer is formed on a substrate by electrolytic silver plating and / or electrolytic silver alloy plating and then the resulting is subjected to an oxidation treatment so that an oxide layer is formed on the surface of the plating layer. It is preferable that the oxide layer formed on the surface of the plating layer has a film thickness of 0.05 micrometers or more.

Description

technical field [0001] The invention relates to an electroplated silver and / or electroplated silver alloy plating piece with an oxide layer on the surface. Background technique [0002] Silver films are widely used for reflective plates for downlighting and / or reflective surfaces of LED (Light Emitting Diode) packages due to their high light reflectance (hereinafter, simply referred to as reflectance). In the LED module, since the input current to the LED is increased until a predetermined light output is obtained, low reflectance of the reflective surface that affects the extracted light output greatly affects the life of the LED. Therefore, in high-output LED modules used for main lighting such as residential lighting and automotive headlights, the reflectance and spectral characteristics of the reflective surface become extremely important factors that affect the performance of the product, and in particular, the highest possible reflectance is required. . Specifically,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C8/12C23C8/42C25D5/48C25D7/00C25D7/08
CPCC25D3/64C23C28/023C23C28/321C23C28/345C25D3/46G02B5/0808H01L33/60C23C22/60C25D3/56C25D5/48
Inventor 伊森彻木名濑隆隆介
Owner JX METALS TRADING CO LTD
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