Nano fine silver particle ink and fine silver particle sintered body

A nano-sized, silver particle technology, applied in inks, conductive materials dispersed in non-conductive inorganic materials, applications, etc., can solve the problems of undisclosed sintering temperature and undisclosed surface roughness of sintered body.

Active Publication Date: 2016-01-13
TANAKA PRECIOUS METAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The average particle size of the silver ultrafine particle colloid is 1-20 nm, is monodisperse, and is polygonal with a uniform shape, and is suitable for materials such as low-temperature sinterable alkaline pastes, but the specific sintering temperature is not disclosed. However, according to the experiments of the present inventors, it was found that the sintering temperature still far exceeds 100°C.
[0011] In addition, the surface roughness of the sintered bodies of Patent Documents 1 and 2 is not disclosed, and both of the surfaces are in a matte state. In addition, it has been confirmed that when the film thickness in terms of weight is about 500 nm, the sintered The volume resistivity of the body exceeds 30μΩ·cm

Method used

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  • Nano fine silver particle ink and fine silver particle sintered body
  • Nano fine silver particle ink and fine silver particle sintered body
  • Nano fine silver particle ink and fine silver particle sintered body

Examples

Experimental program
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Effect test

Embodiment

[0053] Examples of the present invention will be specifically described below.

[0054] Silver particle inks described in the examples were produced in the following manner.

[0055] In the first process, N,N-dimethyl-1,3-diaminopropane is mixed with silver oxalate wetted by 30-200 wt% organic solvent to form N,N-dimethyl -1,3-diaminopropane coordination silver complex. In the second step, hexylamine (6 carbon atoms) and dodecylamine (12 carbon atoms) and oleic acid (19 carbon atoms) as a fatty acid are added to the mixture of the first step and kneaded.

[0056] Specifically, in the first step, silver oxalate is synthesized from silver nitrate and oxalic acid dihydrate, and an organic solvent is added thereto. In this example, the alkylamine was added so that the molar amount of all the alkylamines was approximately 4 to 6 times the molar amount of the silver oxalate. Since there are two silver atoms in the silver oxalate molecule, the amount of the above-mentioned alkylam...

experiment example

[0068] Table 1 shows Experimental Examples 1 to 15. In addition, Comparative Examples 1-8 are shown in Table 2.

[0069]

[0070]

[0071] Experimental Examples 1 to 8 and Comparative Examples 2 to 4 investigated the wetting by various organic solvents, Comparative Example 1 was not wetted, and Experimental Examples 9 to 12 and Comparative Example 8 investigated the types of organic solvents finally dispersed. In Experimental Examples 13-15 and Comparative Examples 5-7, the addition amount of N,N-dimethyl-1,3-diaminopropane, hexylamine, dodecylamine, and oleic acid relative to silver oxalate was studied, and A silver particle ink was prepared.

[0072] In Experimental Examples 1 to 15, silver particle inks could be synthesized, and they were stable inks that did not form precipitation for more than one month. On the other hand, in Comparative Example 2, the synthesis of silver fine particles could not be achieved, and no ink was obtained. In addition, in Comparative E...

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Abstract

Provided are a fine silver particle ink composed of hexylamine, dodecylamine, oleic acid, fine silver particles and a solvent, in which the volume resistivity of a sintered body at 100 DEG C obtained after the ink is applied on a substrate by spin coating is 8 to 25 [mu] CR cm, a sintered body thereof, and a method for producing a fine silver particle ink. When a fine silver particle ink containing coated fine silver particles is produced by a silver-amine complex decomposition method, production can be carried out smoothly. The fine silver particle ink can be sintered even at a low temperature, and a sintered body thereof has a mirror surface and low volume resistance.

Description

[0001] This application is a PCT international application with an international application number of PCT / JP2013 / 068991 and an international application date of July 11, 2013. After entering the Chinese phase, the national application number is 201380041633.0, and the invention name is "silver particle ink, silver particle sintered body, and the manufacturing method of silver particle ink" is a divisional application of the application. technical field [0002] The present invention relates to a nanosized silver particle ink containing nanosized coated silver particles exhibiting good conductivity by sintering on a substrate or the like at a low temperature, and a silver particle sintered body. Background technique [0003] For example, along with demands for smaller, thinner, and lighter electronic devices and improved productivity, printed wiring boards on which electronic components are mounted require faster and higher-density mounting of materials for forming conductive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52B22F1/00H01B1/22B22F1/102B22F1/103
CPCC09D11/52H01B1/22B22F1/102B22F1/103B22F9/30B22F2998/10Y10T428/268B22F3/10H05K1/097B22F1/07H05K3/1291
Inventor 久保仁志大岛优辅中村纪章野口宏史谷内淳一牧田勇一
Owner TANAKA PRECIOUS METAL IND
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