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芯栋微王铮:三大金属互联技术突破 赋能AI先进封装

芯栋微王铮:三大金属互联技术突破 赋能AI先进封装

5月27日至29日,2026第十届集微大会在上海张江科学会堂隆重举行。在5月27日举办的”先进封装与测试技术创新峰会”上,芯栋微(上海)半导体产品及应用技术总监王铮发表了题为《金属互联技术在CoWoS/CoPoS和HBM应用的多样性》的主题演讲,系统解读了双大马士革、TSV、TGV三大金属互联技术在AI先进封装中的关键价值,并披露了公司在电镀设备与工艺解决方案领域的最新突破。

CoWoS:铜与钴的双大马士革工艺

根据Technavio报告,全球CoWoS市场快速增长,已成为AI芯片封装的主流平台。铜双大马士革工艺作为现代集成电路制造的基石技术,在CoWoS架构中发挥着关键互联作用。

王铮指出,随着节点微缩至28纳米及以下,铜互连填充对设备、药液和电流控制的协同要求越来越高:硬件需要提供完美的电场与流场,药液添加剂需要在纳米空间内精准作用,控制系统也必须在几分钟内完成多段电流切换。而芯栋微通过阳极分环、物理搅拌、边缘遮挡、流场控制等硬件手段,结合药液添加剂的精准监控,成功实现了28纳米及以下铜沟槽的无缺陷填充。

针对10纳米以下节点铜互连电阻和RC延迟逼近临界点的挑战,芯栋微开发了钴互连替代方案。在M0层和M1层引入钴材料后,性能提升5至10倍,显著降低传输损耗。通过阳极分环技术解决晶圆中心厚度均匀性问题,并持续精准监控弱酸性钴药液的pH值。

HBM:TSV填充迎接16层堆叠挑战

与CoWoS类似,HBM同样高度依赖金属互联工艺,但其挑战更多来自于堆叠密度的极致追求。

当前,全球HBM市场呈现爆发式增长。数据显示,2025年全球HBM市场规模达345亿美元,预计2026年增至460亿美元,2030年有望达到980亿美元。王铮称,AI需求的”吞噬效应”正在重塑HBM市场结构,从2025年到2026年,AI相关应用的占比显著扩大,非AI应用被大幅压缩。

王铮进一步表示,HBM通过TSV技术将多层DRAM芯片垂直堆叠,形成8层、12层甚至16层的”内存高楼”,直接封装在GPU旁边,成为AI芯片的黄金移动通道。从技术演进来看,HBM1的数据传输速率约为1Gbps,HBM2提升到2Gbps,HBM2E达到3.6Gbps,而HBM3和HBM4则实现了更大提升。到了HBM4,堆叠层数推向16层甚至更高,TSV的孔径缩小到5微米以下,深宽比超过10比1,这对铜的自下而上完美填充提出了极为苛刻的要求。HBM4e为满足16层以上堆叠的散热和高度要求,必须转向无凸点的混合键合技术,这进一步增加了TSV填充的难度。

CoPoS:蝶形双向共形填充破解TGV难题

如果说CoWoS和HBM代表了现有技术的持续演进,那么CoPoS则是一次封装范式的颠覆性升级。根据TowardsPackaging数据,全球面板级封装市场规模将从2025年的8.3亿美元快速增长至2035年的217.5亿美元,复合增长率高达38.6%。消费电子为核心支撑,通信与汽车电子将成为未来关键增量来源。

CoPoS是台积电面向下一代超大规模AI芯片所研发的面板级玻璃基板先进封装技术,是当前主流CoWoS技术的颠覆性升级。其核心逻辑是用方形玻璃基板中介层替代硅中介层,打破AI芯片在面积、散热和电气性能上的物理极限。TGV在玻璃基板上下表面之间建立垂直电连接,使玻璃成为承载RDL、Chiplet、HBM和高密度互连的封装平台。

王铮认为,在CoPoS工艺流程中,TGV的金属化是关键核心工艺。芯栋微采用蝶形双向共形填充方式,通过严格控制药液添加剂的比例,让加速剂优先吸附于孔道中间最窄处形成铜栓搭桥,从而等效为盲孔TSV,实现双向完美填充。

针对垂直孔道,由于中间区域的宽度与两端孔径几乎一致,搭桥难度增加,芯栋微通过优化设备硬件,对孔道内流场方向及压力进行有效调节,增强加速剂的吸附选择性,从而实现完美铜栓搭桥,进而实现TGV的完美填充。

在大板填充方面,例如510x515毫米的大板,芯栋微采用脉冲工艺,搭配合适的药液和电源,当搭桥完成形成两个盲孔时,再利用TSV底部向上的方式实现孔内填满,从而确保大板级别的高质量填充。

协同与布局:设备、药液、工艺窗口三位一体

“在整个金属互联工艺中,设备、药液和工艺窗口三者需要高度协同。"王铮强调,设备的灵活度必须非常高,不仅要兼容当前28纳米甚至14纳米以下节点的技术要求,还要具备未来的拓展性。

药液方面,无论是进口药水还是国产药水,都必须实现80万以上的填充效果,且pH值需严格控制在±0.2以内,这在线控制上是极大的难度和挑战。与此同时,还需通过设备维护药液的稳定性,确保在特定时间范围内持续输出高质量的填充效果,否则一旦出现偏差,后续的CMP等工艺将越做越差,形成叠加劣化。正是基于对这三者的深度协同控制,芯栋微才能在铜、钴、TSV、TGV等多个维度上实现无缺陷填充的工艺突破。

目前,芯栋微的电镀设备产品布局已覆盖化合物半导体、先进封装、BEOL和FOPLP等多个应用领域,构建起多元化的应用场景覆盖能力。"我们在玻璃基板的电镀工艺方面已经与核心客户展开了紧密合作,预计今年年底将正式落地量产。“王铮表示。

从CoWoS的铜钴双大马士革工艺,到HBM的TSV高深宽比填充,再到CoPoS的TGV蝶形双向共形填充,芯栋微正以系统化的金属互联技术布局,助力国内半导体产业链在AI先进封装领域实现从跟跑到并跑的跨越。

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  1. CONNECT:[ UseTime:0.000938s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001500s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000708s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001469s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001447s ]
  6. SELECT * FROM `set` [ RunTime:0.000618s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001540s ]
  8. SELECT * FROM `article` WHERE `id` = 693783 LIMIT 1 [ RunTime:0.000989s ]
  9. UPDATE `article` SET `lasttime` = 1780352781 WHERE `id` = 693783 [ RunTime:0.004439s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000315s ]
  11. SELECT * FROM `article` WHERE `id` < 693783 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000424s ]
  12. SELECT * FROM `article` WHERE `id` > 693783 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000377s ]
  13. SELECT * FROM `article` WHERE `id` < 693783 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000591s ]
  14. SELECT * FROM `article` WHERE `id` < 693783 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000754s ]
  15. SELECT * FROM `article` WHERE `id` < 693783 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000840s ]
0.198241s