Urushi-based Electronic Circuit: Study on Characteristic of Urushi’s Dissolution by Ultraviolet Light

  • Yu Myojin University of Tsukuba
  • Yuki Hashimoto University of Tsukuba


Urushi (Japanese lacquer) has many interesting features, such as electrical insulating capabilities and vulnerability with respect to ultraviolet light (UV) exposure. Here, we describe an urushi-based multilayered electronic circuit (urushi circuit) that is created using an UV laser to locally dissolve the urushi layers. This allows the layers to be connected via the opening/groove created by the UV exposure. Experiments were performed to determine the effect of UV irradiation on the amount of urushi dissolved via variation in the irradiation spot diameter. The amount of urushi dissolved was directly proportional to the UV intensity and irradiation duration. Based on our data, we created a model to describe urushi dissolved to facilitate good reproducibility and controllability for multilayered urushi circuit design.


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How to Cite
Myojin, Y., & Hashimoto, Y. (2016). Urushi-based Electronic Circuit: Study on Characteristic of Urushi’s Dissolution by Ultraviolet Light. Journal of the Institute of Industrial Applications Engineers, 4(1), 11. https://doi.org/10.12792/jiiae.4.11