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Formation of Precise Electrically-Conductive Pattern Using Metal Colloid I-J Ink

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A precise electrically conductive pattern was formed by the I-J technique using ink composed of a highly concentrated colloidal dispersion of nano-meter sized silver particles. The silver particles were encapsulated with a block copolymer to form protected metal colloid. The I-J Ink was formulated using the metal colloid to form an extremely precise electrically-conductive pattern. The ink exhibited a low viscosity at high colloid concentrations and maintained excellent spontaneous dispersing characteristics that prevented I-J head clogging or “Kogation”. A printed line width as small as 20 μm was obtained using a commercial thermal I-J printer. The silver colloid particles were strongly combined with each other to form a dense particle layer on a substrate surface. The electrical resistivity of less than 10−3 Ω was obtained through baking at a temperature of lower than 300°C. The resistivity was reduced to the order of 10−5 Ω when a metal plating copper layer was formed on the metal colloid layer surface. The practical issues in applying the technique to the preparation of a precise print circuit pattern are discussed.
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Document Type: Research Article

Publication date: January 1, 2003

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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