Optoelectronic Technology, Volume. 44, Issue 4, 328(2024)

Study on PR Remain and Leakage Current in Channel Dry Etching of HADS Array Substrate

Xiaofei YANG, Jia MENG, Lei SU, Yang LI, Wen WAN, Yaojun LYU, Juncai WANG, and Jinyang DENG
Author Affiliations
  • Chengdu BOE Optoelectronics Technology Co., Ltd., Chengdu 611731, CHN
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    Figures & Tables(16)
    Microstructures of PR
    PR morphology changes during dry etching
    EDX element analysis of PR remain(Insets are SEM illustrations)
    Formation mechanism of PR remain
    PR undercut level
    Effects of ashing time on tail and TFT leakage current
    Main effect plot of the factors on Ioff variation
    Main effect plot of the factors on PR remain variation
    Optimal solution of Ioff and PR remain improvement
    Micrographs(a), (b)and FIB images(c), (d)before and after improvement of PR remain
    • Table 1. Related processes testing of PR remain

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      Table 1. Related processes testing of PR remain

      实验实验内容光刻胶残留程度
      主条件量产工艺L4
      1光刻胶灰化工艺跳过L0~L1
      2主刻蚀工艺跳过L3
      3后处理跳过L2.5
      4光刻胶灰化时间增加10 sL5+
      5主刻蚀时间增加10 sL4.5
      6后处理时间增加5 sL4.5
      7第一电极层跳过L1
    • Table 1. Images of PR remain related processes

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      Table 1. Images of PR remain related processes

      测试沟道干刻→光刻胶剥离后钝化层成膜后
      自动光学检测
      聚焦离子束
    • Table 2. Test results of PR undercut improvement

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      Table 2. Test results of PR undercut improvement

      条件

      源极/偏置

      功率/kW

      压力

      /Pa

      SF6/O2

      比例

      距离

      d/μm

      光刻胶缺

      口等级

      主条件2/12450/2 000-0.11Lv5
      12/02450/2 000-0.15Lv5+
      22/22450/2 0000.02Lv1
      31/22450/2 0000.06Lv1
      42/1240/2 000-0.07Lv3
      52/21650/2 0000.07Lv0
      62/2850/2 0000.13Lv0
    • Table 3. Ashing time test for PR undercut improvement

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      Table 3. Ashing time test for PR undercut improvement

      条件灰化时间/s光刻胶缺口等级台阶长度/μm

      高温光照

      漏电流/pA

      主条件45L5014.6

      改善

      条件

      5‑110L00.3278.4
      5‑220L00.1540.1
      5‑330L10.0616.5
    • Table 4. Experimental design of post‑treatment

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      Table 4. Experimental design of post‑treatment

      因子低水平高水平中心值
      偏置功率/W01 000500
      压力/Pa426.615.3
      O2/SF6比例2106
    • Table 5. Comparison of process parameters and indexes before and after improvement of channel dry etching

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      Table 5. Comparison of process parameters and indexes before and after improvement of channel dry etching

      沟道刻蚀参数/指标改善前改善后

      光刻胶灰化

      工艺

      源极/偏置功率/kW2/12/2
      压力/Pa2416
      灰化时间/s40~5015~30
      光刻胶缺口程度L5L0~L1
      台阶长度/μm00.1~0.2

      后处理

      工艺

      偏置功率/kW01
      压力/Pa26.64
      O2/SF6比例1610
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    Xiaofei YANG, Jia MENG, Lei SU, Yang LI, Wen WAN, Yaojun LYU, Juncai WANG, Jinyang DENG. Study on PR Remain and Leakage Current in Channel Dry Etching of HADS Array Substrate[J]. Optoelectronic Technology, 2024, 44(4): 328

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    Paper Information

    Category:

    Received: Jan. 22, 2024

    Accepted: --

    Published Online: Mar. 5, 2025

    The Author Email:

    DOI:10.12450/j.gdzjs.202404011

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