AI server boom lifts KB Laminates' HF? copper-clad laminates into the spotlight

Edited by ad hoc news New Releases & Launches Desk. Reviewed before publication on 06/15/2026 at 8:40 PM ET. Details in the imprint.

HF? copper-clad laminates from KB Laminates are moving center stage as AI servers, 5G base stations and high-speed networking gear demand faster signal transmission, lower loss and tighter reliability margins than traditional PCB materials can deliver. The company highlights that its HF? series targets high-frequency and high-speed digital circuits such as 5G base station antennas, AI accelerator boards, high-end routers and automotive radar, combining low dielectric loss, stable dielectric constant and improved thermal performance compared with standard FR-4 laminates. KB Laminates' official product information describes the HF portfolio as serving applications from 5G infrastructure to millimeter-wave communications.

What KB Laminates' HF? copper-clad laminates are designed to do

KB Laminates, part of Kingboard Group, positions HF? as a high-frequency copper-clad laminate (“CCL”) platform engineered to support both high-speed digital and RF designs, especially above 1 GHz where insertion loss and impedance control become critical. According to the company’s technical literature, the HF? family uses reinforced glass cloth substrates and tailored resin systems to deliver a low dielectric constant (Dk) and low dissipation factor (Df), enabling longer trace lengths and higher data rates without excessive signal attenuation in AI data center backplanes and high-layer-count boards. The materials are also designed for multilayer PCB processing with compatibility to standard FR-4 fabrication flows, which can reduce transition barriers for PCB houses that are upgrading lines from conventional laminates.

Thermal and reliability metrics are a key selling point: KB Laminates specifies that HF? CCLs offer high glass transition temperature (Tg), elevated decomposition temperature (Td) and good thermal expansion control to support lead-free soldering, repeated thermal cycling and dense BGA packages typical of AI accelerators and 5G radio units. By keeping z-axis expansion in check, the materials aim to reduce via cracking and pad lifting when boards undergo reflow and field temperature swings, an issue that becomes more pronounced as designs move to finer pitches and thicker backplanes. At the same time, the company emphasizes moisture resistance and chemical stability during PCB fabrication, which is important for maintaining dielectric properties in humid or harsh operating environments.

On the processing side, HF? laminates are positioned as compatible with existing PCB process lines, including standard drilling, desmear, plating and lamination cycles, so that fabricators do not need fully dedicated production equipment to start sampling high-frequency designs. KB Laminates indicates that the products are available in a range of copper weights, core thicknesses and prepreg styles, allowing OEMs and PCB shops to tailor stack-ups for everything from thin RF front-end modules to thick server backplanes. That flexibility is crucial as AI and 5G hardware designers often need to combine high-frequency layers with conventional digital logic and power delivery on the same board, pushing material suppliers to support hybrid stack-ups and precise lamination conditions.

Industry analysts have noted that KB Laminates has been benefiting from strong demand and pricing in upstream materials such as electronic glass fiber cloth and copper-clad laminates used for AI servers and high-end PCBs, boosting profitability and pushing the shares to record levels in recent months. Citi recently raised its 2026 to 2028 earnings forecasts for the company by 7 to 16 percent and lifted its target price after meeting with a leading AI-grade fiberglass cloth producer, highlighting that tight loom capacity and rising average selling prices for electronic fiberglass cloth are supporting KB Laminates' margins in high-end CCL products. A recent Citi research summary on Futunn explicitly links stronger-than-expected profitability in AI-grade fiberglass cloth to positive implications for KB Laminates' high-end laminate business.

HF? sits within a broader upgrade cycle as PCB suppliers pivot from legacy FR-4 boards used in PCs and consumer electronics toward higher-value substrates for AI infrastructure, automotive electronics and industrial networking. For AI servers, the pressure is on to support very high lane counts of PCIe and high-speed interconnects, often in the 112 Gbps and emerging 224 Gbps regimes, which magnifies insertion loss and crosstalk challenges on backplanes and line cards. That environment favors low-loss materials such as HF? that can be paired with high-speed connectors and advanced PCB design techniques, letting hyperscale customers pack more bandwidth into the same rack space while keeping power budgets and error rates under control. The same physics apply to 5G base stations and small cells, where phased-array antennas and massive MIMO architectures rely on controlled-impedance feed networks laid out on RF-grade laminates.

Competition is intense: global peers from Japan, Europe and the US also offer high-frequency laminates for AI and 5G, including PTFE-based and hydrocarbon-ceramic materials with very low loss. KB Laminates' pitch with HF? is not necessarily to claim the absolute lowest Df in every application, but to balance high-frequency performance, cost and manufacturability, especially for customers that already qualify Kingboard’s FR-4 and mid-loss CCLs. For PCB houses in mainland China and across Asia that serve domestic 5G and data center projects, being able to source HF? and related materials locally can shorten supply chains and reduce currency and logistics risk compared with importing all high-frequency materials from overseas vendors.

Within KB Laminates’ portfolio, high-frequency CCLs such as HF? complement other specialized lines like halogen-free FR-4 and high-Tg laminates, giving the company coverage from entry-level consumer boards up to AI and telecom infrastructure. That product ladder is strategically important as demand for legacy PCBs has been volatile, while AI, cloud and 5G deployments have shown more resilient growth and better pricing power. Management has stated in past filings that technology upgrades and higher-margin specialty materials are central to the company’s long-term strategy, which aligns with industry trends pushing more value into advanced substrates, glass cloth and epoxy systems.

For now, HF? copper-clad laminates are primarily sold into Asian manufacturing hubs where most AI server and telecom PCB production is located, and KB Laminates markets itself as one of the major CCL producers serving the mainland Chinese and global PCB industries. International investors have taken notice: Hong Kong-listed KB Laminates has been among the strongest movers in PCB-related stocks this month, repeatedly making “top gainers” lists as AI and PCB concept shares rally. A recent trading recap from Moomoo showed KB Laminates leading gains within a basket of PCB concept stocks, with the stock up more than 14 percent in one session and turnover above HKD 2 billion, underscoring how closely the equity story has become tied to the AI infrastructure build-out. The Moomoo market wrap on PCB concept stocks highlighted KB Laminates as the day’s top performer in the sector.

HF? therefore sits at the intersection of a product and capital markets narrative: on the one hand it is a technical laminate platform aimed at solving practical signal integrity and reliability problems for AI, 5G and high-speed networking boards; on the other, it is part of the high-end materials mix that investors are betting will sustain KB Laminates' earnings as legacy PCB demand matures. KB Laminates is listed in Hong Kong under stock code 01888, and its shares closed at HKD 78.60 on June 15, 2026, after gaining 19.81 percent in that session according to live market data. Trading data compiled by Moomoo show KB Laminates among the top intraday movers on that date, reflecting heightened interest in AI-linked PCB materials.

This article was a.i.-assisted and editorially reviewed. Product information without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Trading involves risk up to and including the total loss of invested capital.