一层“布”涨价270%之后，投资机构用数亿元投票玻璃基板，巽霖科技完成近2亿元B轮融资 一层“布”涨价270%之后，投资机构用数亿元投票玻璃基板，巽霖科技完成近2亿元B轮融资

Summary

Xunlin Technology completes nearly 200 million RMB Series B financing round, third round within half a year, with shareholders spanning market-oriented funds, industrial capital, and regional state-owned capital
Electronic-grade fiberglass cloth prices have doubled from the 2025 low, FR-4 CCL prices surged over 270%, and the organic substrate supply crisis is accelerating the substitution toward glass substrates
Glass substrate substitution is divided into three major tracks: PCB substitution (volume ramp-up in 2026), ABF substrate substitution (advancement in 2027), and Interposer substitution (long-term, 2027–2030)
Xunlin Technology has overcome three major mass-production bottlenecks—cost, first-pass yield, and thick-copper routing—with its Tianjin factory boasting an annual capacity of 300,000 square meters; display substrates have already entered mass shipment
The company has built three progressive process platforms, iterating linearly across six precision levels, covering the full spectrum from display to advanced packaging to co-packaged optics

Deep Analysis

TL;DR

• Xunlin Technology completes nearly 200 million RMB Series B financing round, third round within half a year, with shareholders spanning market-oriented funds, industrial capital, and regional state-owned capital
• Electronic-grade fiberglass cloth prices have doubled from the 2025 low, FR-4 CCL prices surged over 270%, and the organic substrate supply crisis is accelerating the substitution toward glass substrates
• Glass substrate substitution is divided into three major tracks: PCB substitution (volume ramp-up in 2026), ABF substrate substitution (advancement in 2027), and Interposer substitution (long-term, 2027–2030)
• Xunlin Technology has overcome three major mass-production bottlenecks—cost, first-pass yield, and thick-copper routing—with its Tianjin factory boasting an annual capacity of 300,000 square meters; display substrates have already entered mass shipment
• The company has built three progressive process platforms, iterating linearly across six precision levels, covering the full spectrum from display to advanced packaging to co-packaged optics

Why It's Worth Reading

This article systematically outlines the industrial logic and commercialization pathway for glass substrate substitution of organic substrates, revealing the dual drivers of tight封装载板 supply and rising material costs under AI computing power demand. For practitioners, the "cost framework–thick-copper aspect ratio–first-pass yield" three-barrier evaluation system proposed in the article provides a clear framework for assessing the mass-production capability of glass substrate companies.

Technical Analysis

• Three Substitution Tracks and Technical Indicators: PCB substitution focuses on FR-4 and traditional PCBs, with core indicators being reduced signal loss and overall cost advantage; ABF substrate substitution targets FC-BGA packaging, Chiplet, and HBM, with key indicators including warpage control, line width/spacing, hole diameter, and aspect ratio; Interposer substitution addresses CoWoS and CPO scenarios, requiring smaller hole diameters, higher aspect ratios, and via density, while also supporting on-board optical waveguide processing.

• Xunlin Technology's Mass-Production Capability: The Tianjin full-process factory covers cutting, thinning, TGV drilling, PVD metallization, electroplating, patterning, and solder mask, with an annual capacity of 300,000 square meters. Key breakthroughs include: PVD copper-cladding technology derived from the thermal barrier coating system of aero-engines, with copper-clad bonding strength several times that of industry standards; Cu-ABX quaternary alloy seed layer; continuous VCP electroplating capacity several times that of traditional production lines; and mass shipment of substrates for Mini LED backlight, COB direct display, and MIP display modules.

• Three-Platform Process Architecture: The first platform, centered on the subtractive process, supports large-size glass-based PCBs and HDIs, forming the cash-flow foundation; the second platform, centered on semi-additive fine-line circuits and unit-bonding stacking, achieves multi-fold layer multiplication, extending to GCS glass-core substrates; the third platform targets packaging and optoelectronic integration, tackling high-precision TGV and glass interposers, combined with ion-exchange optical waveguides, laser direct-write modification, and other optical processing capabilities. The three platforms share core processes such as TGV, PVD, electroplating, exposure, and etching, with upgrades driven by process package iteration rather than production line reconstruction.

• Mass-Production Validation Barriers: Glass substrate substitution of organic PCBs requires simultaneously clearing three barriers—cost framework closure, high copper-thickness line-width-ratio capability, and first-pass yield across all processes. Xunlin Technology claims to be one of the very few companies globally that has passed all three metrics and possesses mass-production viability, with comprehensive costs expected to be significantly lower than comparable PCBs and copper-clad bonding strength several times that of the industry.

Industry Insights

• The Material Substitution Window Has Arrived: Rising fiberglass cloth prices have exposed the cost ceiling of organic substrates, and the critical inflection point for glass substrates to shift from technical validation to economic substitution has arrived. 2026 will be the inaugural year for glass-based PCB substitution, and companies need to accelerate capacity layout to meet demand.

• Process Platformization Is the Key Path to Industrialization: Xunlin Technology's six-level precision progressive strategy demonstrates that glass substrate companies need to build reusable, iterative process platforms rather than pursuing single-point breakthroughs. Production line investments should appreciate continuously as precision climbs, avoiding the risk of asset obsolescence caused by technological iteration.

• Supply Chain Collaboration Value Comes to the Fore: Shareholders in this financing round include industrial capital such as laser equipment maker Hymson (海目星) and optical communications company Guangpu (光莆股份), reflecting that glass substrate industrialization requires deep upstream-downstream collaboration. Future competition will not be a contest of single-enterprise technology alone, but rather a test of supply chain integration capability.

TL;DR

• 巽霖科技完成近2亿元B轮融资，半年内第三轮融资，股东涵盖市场化基金、产业资本与区域国资
• 电子级玻纤布价格较2025年低点翻倍、FR-4覆铜板涨幅超270%，有机基板供给危机推动玻璃基板替代加速
• 玻璃基板替代分为三大赛道：PCB替代（2026年放量）、ABF载板替代（2027年推进）、Interposer替代（2027-2030年远期）
• 巽霖科技攻克成本、直通良率、厚铜布线三大量产瓶颈，天津工厂年产能30万平方米，显示基板已批量出货
• 公司构建三套递进工艺平台，沿六级精度线性迭代，覆盖从显示到先进封装再到光电共封装的全场景

为什么值得看

本文系统梳理了玻璃基板替代有机基板的产业逻辑与商业化路径，揭示了AI算力需求下封装载板紧缺与材料成本上涨的双重驱动因素。对从业者而言，文中提出的"成本框架-厚铜线宽比-直通良率"三门槛评估体系，为判断玻璃基板企业量产能力提供了清晰框架。

技术解析

• 三大替代赛道与技术指标：PCB替代聚焦FR-4与传统PCB，核心指标为信号损耗降低与综合成本优势；ABF载板替代面向FC-BGA封装、Chiplet与HBM，关键指标包括翘曲控制、线宽线距、孔径与深宽比；Interposer替代针对CoWoS与CPO场景，需实现更小孔径、更高深宽比与通孔密度，同时支持光波导同板加工。

• 巽霖科技量产能力：天津全流程工厂覆盖切割、减薄、TGV成孔、PVD金属化、电镀、图形化、阻焊全制程，年产能30万平方米。核心突破包括：源自航空发动机热障涂层体系的PVD覆铜技术，覆铜结合强度数倍于行业水平；Cu-ABX四元合金种子层；连续VCP电镀产能数倍于传统线体；已实现Mini LED背光、COB直显、MIP显示模组基板批量出货。

• 三套工艺平台架构：第一套以减成法为核心，支撑大尺寸玻璃基PCB与HDI，是现金流基本盘；第二套以半加成精细线路与单元体键合为核心，实现层数倍增堆叠，延伸至GCS玻璃芯载板；第三套面向封装与光电融合，攻关高精度TGV与玻璃中介层，叠加离子交换光波导、激光直写改性等光加工能力。三套平台共享TGV、PVD、电镀、曝光、蚀刻等核心制程，升级依靠工艺包迭代而非产线重建。

• 量产验证门槛：玻璃基板替代有机PCB需同时跨越三道门槛——成本框架闭合、高铜厚线宽比能力、全工序直通良率。巽霖科技声称是全球极少数三重指标全部通过且具备量产可能性的企业，综合成本有望较同类型PCB大幅降低，覆铜结合强度数倍于行业。

行业启示

• 材料替代窗口期已至：玻纤布涨价使有机基板成本天花板显现，玻璃基板从技术验证转向经济替代的关键节点已到来。2026年将成为玻璃基PCB替代元年，企业需加速产能布局以承接需求。

• 工艺平台化是产业化关键路径：巽霖科技的六级精度递进策略表明，玻璃基板企业需构建可复用、可迭代的工艺平台，而非单点突破。产线投资应随精度爬升持续增值，避免技术迭代导致的资产淘汰风险。

• 产业链协同价值凸显：本轮融资股东包含激光装备（海目星）、光通讯（光莆股份）等产业资本，反映玻璃基板产业化需要上下游深度协同。未来竞争将不仅是单一企业技术比拼，更是产业链整合能力的较量。