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  "company_name": "テクセンドフォトマスク",
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  "updated": "2026-08-14",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/429A/",
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      "有価証券報告書"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
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      "date": "1961",
      "importance": 2,
      "event": "凸版印刷がシリコントランジスタ製造用フォトマスクの試作に成功",
      "source": "有価証券報告書"
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      "date": "1968/3",
      "importance": 3,
      "event": "朝霞工場精密部品棟にクリーンルームが完成しシリコントランジスタマスクの量産を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1970/9",
      "importance": 1,
      "event": "滋賀精密工場が竣工",
      "source": "有価証券報告書"
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    {
      "date": "1974/12",
      "importance": 1,
      "event": "朝霞精密電子第一工場が竣工",
      "source": "有価証券報告書"
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    {
      "date": "1986/2",
      "importance": 1,
      "event": "朝霞精密電子第二工場が竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/3",
      "importance": 2,
      "event": "中華映管、揚博科技との合弁で台湾に中華凸版電子（現 中華科盛德光罩）を設立",
      "source": "有価証券報告書"
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    {
      "date": "2003/2",
      "importance": 1,
      "event": "朝霞第三工場が竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/4",
      "importance": 3,
      "event": "DuPont Photomasks の株式取得を完了し米国事業を統合",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/5",
      "importance": 1,
      "event": "上海凸版光掩模（現 上海徐匯科盛徳半導体）の持分28.5%を買い取り完全子会社化",
      "source": "有価証券報告書"
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      "date": "2015/3",
      "importance": 1,
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      "source": "有価証券報告書"
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    {
      "date": "2015/4",
      "importance": 1,
      "event": "上海凸版光掩模が新工場を建設しフォトマスクの生産能力を増強",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/8",
      "importance": 2,
      "event": "Toppan Photomasks Round Rock を設立しGlobalFoundries向けに供給開始",
      "source": "有価証券報告書"
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      "date": "2022/4",
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      "source": "有価証券報告書"
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      "date": "2023/7",
      "importance": 1,
      "event": "本社を汐留シティセンターに移転",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/11",
      "importance": 2,
      "event": "商号をテクセンドフォトマスクに変更",
      "source": "有価証券報告書"
    },
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      "date": "2025/10",
      "importance": 1,
      "event": "東京証券取引所プライム市場に上場",
      "source": "有価証券報告書"
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