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Green Ink-Jet Technology for Fabrication of Multilayer Flexible Circuit Part I: System Construction & Fabrication Process

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Abstract:

Printed circuit boards (PCB) are being widely applied for related electronic produces in industry. The trend in the future is toward narrower metal line, tiny via hole, and complex multilayer manufacture processed. The challenge is therefore for the difficulty of producing excellent metal thickness on substrate surface and inner surrounding of holes for high level application. This study proposed an improving method on electroless plating, and combined with the ink-jet printing of catalyst to form a high aspect ratio of metal thickness for the substrate surface and hole inner wall. This study laminated the flow direction by dynamic pressure control and modulated the velocity at divergence along the substrate surface and hole inner wall. Meanwhile, the stabilization of electroless plating was tuned by an inner flow circulation, to reduce of cavity defect in metal forming. By this system improving, high performance circuit at full reliability was made on multilayer flexible substrate with holes, the variation of aspect ratio of thickness can control within 13%, and further reduce up to 2% with the hole diameter decrease.

Document Type: Research Article

Publication date: 2006-01-01

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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