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Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method
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Laser-Induced Silver Seeding on Filter Paper for Selective Electroless Copper Plating.

Chang-Chun Liu1,2, Jin Cheng3, Xiao-Qiang Li4

  • 1Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan. s167438z@st.go.tuat.ac.jp.

Materials (Basel, Switzerland)
|August 8, 2018
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Summary

Researchers created a copper pattern on flexible filter paper/polyacrylonitrile (FP/PAN) fabric. Laser-induced silver particles acted as seeds for uniform copper deposition, enabling flexible printed electronics.

Keywords:
copper patternelectroless platingflexible printed circuit boardlaser-induced irradiation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Creating flexible printed circuit boards on polymer fabrics presents significant challenges.
  • Existing methods often struggle with substrate compatibility and pattern definition.

Purpose of the Study:

  • To develop a novel method for fabricating copper patterns on soft polymer fabric substrates.
  • To achieve uniform copper deposition with good conductivity for flexible electronics applications.

Main Methods:

  • A composite film of filter paper/polyacrylonitrile (FP/PAN) was prepared.
  • Silver patterns were formed on the FP/PAN film via laser-induced in situ reduction of silver nitrate (AgNO₃).
  • Electroless copper plating was performed using the silver patterns as seeds.

Main Results:

  • Uniform copper deposition was successfully achieved on the FP/PAN substrate.
  • The resulting copper patterns exhibited good electrical conductivity.
  • Laser irradiation effectively controlled silver particle agglomeration and seeding.

Conclusions:

  • The developed method provides a viable route for fabricating flexible printed circuits on polymer fabrics.
  • This technique offers potential for low-cost, high-performance flexible electronic devices.
  • The use of laser-induced silver seeding is a key innovation for pattern formation.