Asahi Kasei Kabushiki Kaisha

Eiichi Ohno

Masanori Tsuruta

Toru Yumoto

Shimpei Ogawa

Takashi Minakata

Yutaka Natsume

Hirotaka Ooi

A conductive pattern having high dispersion stability and a low resistance over a board is formed. A dispersing element () contains a copper oxide (), a dispersing agent (), and a reductant. Content of the reductant is in a range of a following formula (1). Content of the dispersing agent is in a range of a following formula (2).0.0001&#x2264;(reductant mass/copper oxide mass)&#x2264;0.10&#x2003;&#x2003;(1)0.0050&#x2264;(dispersing agent mass/copper oxide mass)&#x2264;0.30&#x2003;&#x2003;(2) The dispersing element containing the reductant promotes reduction of copper oxide to copper in firing and promotes sintering of the copper.

Dispersing element, method for manufacturing structure with conductive pattern using the same, and structure with conductive pattern

A conductive pattern having high dispersion stability and a low resistance over a board is formed. A dispersing element () contains a copper oxide (), a dispersing agent (), and a reductant. Content of the reductant is in a range of a following formula (1). Content of the dispersing agent is in a range of a following formula (2).0.0001&#x2264;(reductant mass/copper oxide mass)&#x2264;0.10&#x2003;&#x2003;(1)0.0050&#x2264;(dispersing agent mass/copper oxide mass)&#x2264;0.30&#x2003;&#x2003;(2)The dispersing element containing the reductant promotes reduction of copper oxide to copper in firing and promotes sintering of the copper.

A dispersion which contains a dispersant and particles selected from among metal particles and metal oxide particles, and which is characterized in that: the dispersant has a chemical structure that is able to be bonded or adsorbed to the particles; and the dispersant contains a low-molecular-weight dispersant that has at least one peak within a molecular weight region of 31 or more but less than 1,000 in the molecular weight distribution curve in terms of polyethylene glycol as determined by gel permeation chromatography and a high-molecular-weight dispersant that has at least one peak within a molecular weight region of 1,000 or more but 40,000 or less in the above-described molecular weight distribution curve.

Dispersion

To provide a copper and/or copper oxide dispersion capable of forming an electroconductive film exhibiting excellent stability with respect to temporal change and having a fine pattern form, an electroconductive film laminate obtained by laminating the electroconductive film produced using the copper and/or copper oxide dispersion, and an electroconductive film transistor. The copper and/or copper oxide dispersion contains 0.50-60 mass % of copper and/or copper oxide microparticies and the following components (1)-(4): (1) a surface energy modifier; (2) an organic compound having a phosphate group; (3) 0.050-10 mass % of a solvent having a vapor pressure of 0.010 Pa to less than 20 Pa at 20&#xb0; C.; and (4) a solvent having a vapor pressure of 20 Pa to 150 hPa at 20&#xb0; C. The electroconductive laminate is obtained by laminating an electroconductive film containing copper on a substrate.

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Tokyo, Japan

Eiichi Ohno