Papers - Miyamoto, Akihito

Electronic device and electronic device manufacturing method

A Miyamoto, Y Okumoto

US Patent 9,112,162  2015

A flexible AMOLED display driven by organic TFTs with an inkjetted semiconductor layer

Miyamoto A., Okumoto Y., Sasai K., Morita K.

Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers (Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers)  68 ( 10 ) J437 - J441 2014

ISSN  13426907

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A 4-inch 80-ppi flexible AMOLED display was fabricated using organic TFTs with an inkjetted semiconductor layer on polymer gate insulator film. To suppress variations in organic TFT (OTFT) characteristics, the process damage to polymer gate insulator was remedied by surface treatments, and organic semiconductor crystallinity was improved by controlling the film thickness, giving a threshold voltage uniformity of -0.2 ± 0.45 V. We also observed the non-degradation of the OTFT characteristics even after bending it 200 times over a 5-mm radius.

• Access to Document (DOI)

Thin-film transistor, display panel, and method for producing a thin-film transistor

Y Okumoto, A Miyamoto

US Patent 8,921,867  2014

Thin-film transistor device and method for manufacturing same, organic electroluminescent display element, and organic electroluminescent display device

Y Okumoto, A Miyamoto, T Ukeda

US Patent 8,907,344  2014

Semiconductor transistor manufacturing method, driving circuit utilizing a semiconductor transistor manufactured according to the semiconductor transistor manufacturing method …

Y Okumoto, A Miyamoto

US Patent 8,871,579  2014

Organic thin-film transistor and method of manufacturing organic thin-film transistor

T Ukeda, A Miyamoto

US Patent 8,916,863  2014

Bezel-less PMOLED modules with flexible substrates for scalable display system

Iijima H., Izuchi M., Makino H., Wakabayashi T., Sasai K., Okumoto Y., Miyamoto A., Morita K.

21st International Display Workshops 2014, IDW 2014 (21st International Display Workshops 2014, IDW 2014)  2   1407 - 1410 2014

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We have successfully demonstrated a bezel-less scalable display system by arraying bezel-less PMOLED modules. Each has a lifetime of40,000 hours life, 250-firn encapsulation width, l-mm pixel pitch and a flexible substrate. They were realized by SiN/SiN edge encapsulation and the adoption of a slide bending structure.

A flexible AMOLED display driven by organic TFTs with an inkjetted semiconductor layer

Miyamoto A., Okumoto Y., Sasai K., Morita K.

Proceedings of the International Display Workshops (Proceedings of the International Display Workshops)  1   348 - 349 2013

ISSN  18832490

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A 4-inch 80-ppi flexible AMOLED display was fabricated using organic TFTs with an inkjetted semiconductor layer. To suppress vanations in OTFT characteristics, the process damage to polymer gate insulator was re-covered by surface treatments, giving uniformity of threshold voltages of -0.2 ± 0.45 V.

Quantitative extraction of contact resistance at organic semiconductor - Metal electrode interface and impact of treatment on the contact resistance

Sasai K., Okumoto Y., Miyamoto A., Morita K., Fujisaki Y., Yamamoto T.

Proceedings of the International Display Workshops (Proceedings of the International Display Workshops)  1   237 - 240 2012.12

ISSN  18832490

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Contact resistance at the organic semiconductor (OSC) - metal electrode interface has been successfully estimated by transmission line method and AFM potentiometry. We have found that contact resistance of source edge was drastically reduced by surface treatment of UV/ozone or self-assembled monolayers of thiol before OSC fabrication at the first time.

Top‐emission AMOLED display driven by organic TFTs with semiconductor layer patterned by inkjet process

Y Okumoto, T Ukeda, M Matsui, K Okumoto, A Miyamoto, K Morita

Journal of the Society for Information Display 20 (10), 575-580  2012

Top-emission AM-OLED panel driven by organic TFTs with semiconductor layer patterned by ink-jet process

Okumoto Y., Ukeda T., Matsui M., Okumoto K., Miyamoto A., Morita K.

Proceedings of the International Display Workshops (Proceedings of the International Display Workshops)  1   191 - 192 2011.12

ISSN  18832490

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We have developed an ink-jet process for organic semiconductor (OSC) layer in organic thin film transistors (OTFTs). The OSC crystallinity was improved by adjusting contact angles. The OTFTs showed the high mobility of 2.5 cm 2/Vs. We also fabricated a 4-inches 80ppi AM-OLED on glass substrate, which performed good uniformity in luminance and high moving picture quality.

Vertical organic fet and method for manufacturing same

A Miyamoto

US Patent App. 12/393,531  2009

Non-volatile memory and the fabrication method

K Morita, N Yamada, A Miyamoto, T Ohtsuka, H Tanaka

US Patent 7,394,090  2008

Non-volatile memory and the fabrication method

K Morita, N Yamada, A Miyamoto, T Ohtsuka, H Tanaka

US Patent 7,232,703  2007

Non-volatile memory and fabrication method thereof

K Morimoto, H Tanaka, T Ohtsuka, A Miyamoto

US Patent 7,023,014  2006

Vertical organic FET and method for manufacturing same

A Miyamoto

US Patent App. 11/260,186  2006

Nonaqueous secondary battery, constituent elements of battery, and materials thereof

K Watanabe, K Nichogi, N Nanai, A Miyamoto, S Tsuchiya

US Patent App. 11/281,088  2006

Nonaqueous secondary battery, constituent elements of battery, and materials thereof

K Watanabe, K Nichogi, N Nanai, A Miyamoto, S Tsuchiya

US Patent App. 10/392,412  2003

Nonaqueous secondary battery, constituent elements of battery, and materials thereof

K Watanabe, K Nichogi, N Nanai, A Miyamoto, S Tsuchiya

US Patent App. 10/391,698  2003

Nonaqueous secondary battery, constituent elements of battery, and materials thereof

K Watanabe, K Nichogi, N Nanai, A Miyamoto, S Tsuchiya

US Patent 6,413,486  2002