HBM 鏈大爆發:南亞科、華邦電、十銓、威剛、中美晶全動能解析

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2026 年 4 月底,台股記憶體與 HBM 概念股集體爆發,南亞科(2408)打入輝達 Vera Rubin 供應鏈、股價亮燈漲停,帶動 Google Trends 台灣熱搜出現「2408」「高頻寬記憶體」「中美晶」「合晶」「華邦電」連環竄升。本文整理本波 HBM/DRAM 上漲的核心驅動力與台廠各家的具體受惠路徑,方便讀者一次看懂供應鏈位置。

核心邏輯:AI 伺服器吃掉全球 DRAM 66% 產能

本波驅動力來自 AI 加速器對 HBM(高頻寬記憶體)的爆量需求。HBM 採堆疊式 DRAM 封裝、單顆容量與頻寬遠高於傳統 DDR5,是 NVIDIA H100/H200/Blackwell/Vera Rubin 等加速器的標準配備。AI 伺服器吞掉全球 DRAM 約 66% 產能後,DDR5、LPDDR、利基型 DRAM 全面進入結構性缺貨—這也是消費級記憶體價格逆勢上漲的根本原因。

南亞科(2408):標準型 DRAM、剛打入 Vera Rubin 供應鏈

南亞科專注標準型 DRAM,2026 年 4 月底傳出打入輝達下一代 Vera Rubin 平台供應鏈,是台廠首家入列。投顧預估 2026 年 EPS 翻 9 倍至 21 元級距、2027 年 17 元,反映 AI 鏈拉貨的盈餘彈性。10 奈米級(1B)製程量產進度是觀察點,能否切入 DDR5 主流市場決定未來定價力。

華邦電(2344):利基型 DRAM + 邊緣 AI LPDDR

華邦電產品結構偏利基型記憶體(Specialty DRAM)與 NOR Flash,主攻車用、工控、IoT。本波受惠來自 AI PC 與 AI 手機要求高效能、低功耗 LPDDR,華邦電在邊緣 AI 裝置的滲透率提升。市場將其視為「不直接吃 HBM 但被排擠效應拉抬」的二線受惠標的。

模組廠:威剛(3260)、十銓(4967)、創見、宇瞻

記憶體模組廠在電競、伺服器、企業儲存的高階應用佔比極高。當原廠(南亞科、美光、SK 海力士、三星)優先把產能轉到 HBM 後,模組廠取得普通 DRAM 顆粒的成本壓力增加,但反映在售價端的漲幅更快、毛利率擴張。威剛與十銓本季在電競高階模組的營收比重持續上升。

矽晶圓上游:中美晶、合晶

HBM 與 DRAM 擴產都需要 12 吋矽晶圓。南亞科進輝達 Vera Rubin後,中美晶(5483)、合晶(6182)作為矽晶圓供應端同步受惠。這條鏈的特性是「Capex 啟動 → 晶圓需求拉升 → 產能緊俏」,本季合晶營運動能明顯加溫。

SK 海力士、三星端的觀察點

韓系 DRAM 三巨頭中,SK 海力士因 HBM 領先在 2026 年發放每人約 3,000 萬台幣獎金,反映其 AI 鏈現金流之強勁;對照三星本月再度傳出工廠罷工(Google Trends 4/27 出現「三星罷工」熱搜),韓系兩大廠的內部勞動力動態,將直接影響全球 HBM 與 DDR5 供應節奏,間接拉抬台廠補位空間。

不是泡沫:景氣循環與 AI 結構性需求並存

記憶體本質仍是高度週期股,但本波與 2017、2021 年的差別在於「AI 結構性需求」與「DRAM 排擠效應」雙軸同時運作。下一個觀察點是 SK 海力士、美光、三星的 Q1 26 財報(5 月初陸續公布),以及輝達 Vera Rubin 的實際 ramp-up 時程是否延續到 2027 上半年。對台廠而言,此波熱度至少持續到第三季財報才會有明確驗證/回檔信號。

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