1200 Dots-Per-Inch Light Emitting Diode Array Fabricated by Solid-Phase Zinc Diffusion
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概要
- 論文の詳細を見る
We developed a 1200 dots-per-inch light emitting diode array (1200 dpi LED array) chip using a GaAs_lt0.8gt P_lt0.2gt epitaxial substrate for the first time. One LED array chip consists of 256 LEDs. In general, LED arrays are fabricated by vapor-phase zinc diffusion. From the viewpoint that shallow junctions should be formed to fabricate a very high-density LED array, solid-phase diffusion seems to be more suitable. We fabricated the LED array using selectively-masked solid-phase zinc diffusion, and the diffusion depth was controlled at 1μm. The diffusion depth was uniform under the diffusion window. The ratio of the length of lateral diffusion to the diffusion depth was about 1.7. These features imply that Zn diffusion was well controlled. In the Zn diffusion, the carrier concentration in the Zn diffusion region was high enough and the sheet resistance of the diffusion region with a diffusion depth of 1μm was low enough to obtain a sufficient level of emitted light power. The results of performance tests showed that the characteristics of the LED array chip are satisfactory for application in optical printer print heads, because of the array's highly-resolved near-field pattern characteristic, ample emitted light power, low emitted-light-power deviation, and long life.
- 社団法人電子情報通信学会の論文
- 1997-03-25
著者
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Nakamura Y
The Authors Are With Fujitsu Laboratories Limited
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Sugimoto Takara
The Authors Are With Optoelectronics & High Frequency Device Research Laboratories Nec Corporati
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Abiko Ichimatsu
Microsystems Technology Laboratory Oki Electric Industry Co. Ltd.
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Shimizu T
Networking Research Laboratories Nec Corporation
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Ogihara M
Microsystems Technology Laboratory Oki Electric Industry Co. Ltd.
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OGIHARA Mitsuhiko
Microsystems Technology Laboratory, Oki Electric Industry, Co., Ltd.
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SHIMIZU Takatoku
Microsystems Technology Laboratory, Oki Electric Industry, Co., Ltd.
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TANINAKA Masumi
Microsystems Technology Laboratory, Oki Electric Industry, Co., Ltd.
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NAKAMURA Yukio
Microsystems Technology Laboratory, Oki Electric Industry, Co., Ltd.
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Shimoda T
Opto-electronics And High Frequency Device Research Laboratories Nec Corporation
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Taninaka Masumi
Microsystems Technology Laboratory Oki Electric Industry Co. Ltd.
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