Research on microstructure of nickel disc and optical disc for long-life holographic storage by two-time electroplate

Wenbo Chen; Xiong Li; Weisheng Yue; Ziwen Zhou; Jianfeng Ye; Xiangang Luo

doi:10.1117/12.2604819

24 November 2021 Research on microstructure of nickel disc and optical disc for long-life holographic storage by two-time electroplate

Wenbo Chen, Xiong Li, Weisheng Yue, Ziwen Zhou, Jianfeng Ye, Xiangang Luo

Author Affiliations +

Proceedings Volume 12066, AOPC 2021: Micro-optics and MOEMS; 120660T (2021) https://doi.org/10.1117/12.2604819
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

In this paper, we report the influence of laser intensity on small dimensions of the microstructure for both exposure of graphic zone and blank zone. Also, the one-time electroplate technology and the two-time electroplate technology were conducted for production of optical discs. A series of laser intensities (30mW, 30%, 35%, 40%, 45%, 50%, 55%) are conducted through laser direct writing. The micropore size increased with the laser intensity for exposure of graphic zone to the laser which leaving holes on the surface of master disc, while the micropore size decreased with laser intensity for exposure of blank zone which leaving bosses on the surface master disc. Moreover, the optimum laser intensity is found to be 45% for both one-time electroplating and two-time electroplating. The micropore size remains the same size during the whole process indicating the excellent stability and reliability of the process. In addition, the demolding process during the production of optical disc is smooth due to the controlled angle between photoresist and nickel surface. However, the height of microstructure boss on the optical disc after injection molding depended on the size of the microstructure. The height of the boss was 150nm for 2μm zone while it was only 80nm for 1μm zone. This work proves the feasibility and potential use of a new physical format for long-life holographic storage disc, which may break monopolies in optical storage field, by applying one-time electroplating and two-time electroplating method.

Citation Download Citation

Wenbo Chen, Xiong Li, Weisheng Yue, Ziwen Zhou, Jianfeng Ye, and Xiangang Luo "Research on microstructure of nickel disc and optical disc for long-life holographic storage by two-time electroplate", Proc. SPIE 12066, AOPC 2021: Micro-optics and MOEMS, 120660T (24 November 2021); https://doi.org/10.1117/12.2604819

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KEYWORDS

Nickel

Optical discs

Electroplating

Holography

Photoresist materials

Glasses

Visualization

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