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Printing ink, metal nanoparticles used in the same, wiring, circuit board, and semiconductor package

A metal nanoparticle, printing technology, applied in printed circuits, printing, ink and other directions, can solve problems such as inability to disperse

Inactive Publication Date: 2012-07-04
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copper oxide nanoparticles obtained from different sources have dispersibility problems such as inability to disperse, or problems with dispersion stability such as the generation of clear liquid due to the generation of precipitates and separation of particles (see, for example, Patent Documents 14 and 15).
Therefore, only limited particles can be used in Cu-based inks for printing methods, and there is still room for improvement.

Method used

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  • Printing ink, metal nanoparticles used in the same, wiring, circuit board, and semiconductor package
  • Printing ink, metal nanoparticles used in the same, wiring, circuit board, and semiconductor package
  • Printing ink, metal nanoparticles used in the same, wiring, circuit board, and semiconductor package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] (Preparation of inkjet ink)

[0168] To 73 g of γ-butyrolactone (concentration of copper oxide nanoparticles of 27 mass%), 27 g of copper oxide nanoparticles (copper oxide, average primary particle size of 74 nm, product name: Nanotek CuO, manufactured by CI Chemical Co., Ltd.) was added, and ultrasonic waves were used. A homogenizer (US-600, Nippon Seiki Co., Ltd.) was processed for 5 minutes under the conditions of 19.6 kHz and 600 W to obtain a dispersion. A centrifugal separator was used to remove coarse particles in the dispersion liquid at a rotation speed of 1500 rpm for 4 minutes to prepare an inkjet ink (ink for printing method).

[0169] The dynamic viscosity of the prepared inkjet ink was measured using the small vibrating viscometer SV-10 manufactured by A&D Co., Ltd., and the result was 8 mPa·s. The prepared ink was measured using the fully automatic surface tensiometer CBVP-Z manufactured by Kyowa Interface Science Co., Ltd. The surface tension of the inkjet i...

Embodiment 2

[0183] (Preparation of inkjet ink)

[0184] As a dispersion medium, except that NMP (N-methylpyrrolidone) was used instead of γ-butyrolactone, an inkjet ink was prepared in the same manner as in Example 1. Then, in the same manner as in the “quantitative analysis of ionic impurities” of Example 1, the total ionic impurities were analyzed. The analysis results are shown in Table 1.

[0185] (Dispersion stability)

[0186] In the same manner as in the "evaluation of dispersibility and dispersion stability" of Example 1, the particle size distribution after one day, the occurrence of precipitation after one week, and the presence or absence of a clear liquid were evaluated. As a result, the particle size distribution shows that the volume average particle size is 0.07μm, d 90％ It has a unimodal particle size distribution of 0.1 μm and good dispersibility. After a week, no precipitation or clear liquid was seen in the ink that was left standing, and the dispersion stability was good. ...

Embodiment 3

[0190] (Preparation of inkjet ink)

[0191] Weigh 10 g of copper nanoparticles with a core / shell structure (average particle size 76nm, manufactured by Nisshin Engineering) and 40 g of γ-butyrolactone with a core of copper and a shell of copper oxide in a sample bottle, and then close it tightly. Treated in an ultrasonic scrubber for 60 minutes to obtain inkjet ink.

[0192] (Dispersion stability)

[0193] In the same manner as in the "evaluation of dispersibility and dispersion stability" of Example 1, the particle size distribution after one day, the occurrence of precipitation after one week, and the presence or absence of a clear liquid were evaluated.

[0194] As a result, the particle size distribution shows that the volume average particle size is 0.2μm, d 90％ It has a bimodal particle size distribution of 0.6 μm with a small amount of agglomeration, no coarse particles of 1 μm or more, and good dispersibility. After a week, no precipitation or clear liquid was seen in the ink...

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Abstract

Disclosed is a printing ink comprising Cu- and / or CuO-containing metal nanoparticles, which obtains excellent dispersion properties and successive dispersion stability without using additives such as dispersing agents. Specifically disclosed is a printing ink that comprises Cu- and / or CuO-containing metal nanoparticles and has no more than 2,600 ppm of ionic impurities in the total solid content. The printing ink is obtained by dispersing the Cu- and / or CuO-containing metal nanoparticles, which have no more than 2,600 ppm of ionic impurities in the total solid content, in a dispersion medium.

Description

Technical field [0001] The present invention relates to containing Cu and / or CuO and / or Cu 2 Ink for printing method of metal nanoparticles of O and metal nanoparticles used in the ink, specifically, it relates to ink for printing method used in the formation of conductor layers and wiring patterns, and metal nanoparticles used in the ink, and Wirings, circuit boards, and semiconductor packages formed with ink using this printing method. Background technique [0002] The technology of printing and forming various functional inks by printing methods such as inkjet printing has attracted attention. Among them, from the viewpoint of the formation of printed conductor wiring, an ink in which particles containing Cu and / or Cu oxide are dispersed has been studied. Inkjet printing is a method of ejecting tiny droplets from tiny nozzles, so if the ink contains coarse particles close to the ink nozzles, nozzle clogging will occur. In addition, if particles are added, the viscosity will i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00B41J2/01B41M5/00H05K3/10H05K3/12
CPCC09D11/52H05K1/097C09D11/322C09D11/30H01B1/16H05K3/10
Inventor 中子伟夫山本和德神代恭横泽舜哉江尻芳则增田克之黑田杏子稻田麻希
Owner RESONAC CORPORATION
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