Why Kingboard’s KB-6160 high-Tg PCB laminate is drawing new attention
19.06.2026 - 00:22:07 | ad-hoc-news.de
Reviewed: ad hoc news Software & Services desk. Edited and checked on 2026-06-18, 22:20. Details in the imprint.
With the KB-6160 laminate, Kingboard puts a high-Tg workhorse on the bench that is meant to live where server backplanes, routers, and base stations run hot. The material looks unassuming, but its job is brutal: stay dimensionally stable while copper and components cook.
Background on the Kingboard Holdings stock
Kingboard’s laminate portfolio, including KB-6160 for demanding PCB designs, sits at the core of its growth story in networking, computing and AI hardware.
What KB-6160 is designed to do
KB-6160 is a glass-fabric, epoxy-based copper-clad laminate with a specified glass transition temperature in the high-Tg class around 175 °C, explicitly aimed at multi-layer PCBs that see elevated operating temperatures and lead-free soldering profiles. Its datasheet positions it for telecom, networking and computing infrastructure where long reflow cycles are routine.
Kingboard highlights low Z-axis thermal expansion, stable dielectric properties and good drilling performance at high layer counts, which together target the pain points of thick backplanes and dense line cards. In practice, that means fewer barrel cracks in plated through-holes and less warping after multiple reflows, especially in 10+ layer constructions.
Key specs that matter on the bench
On paper, KB-6160 offers a typical dielectric constant around 4.2 at 1 MHz and dissipation factor in the region of 0.015, placing it squarely in the workhorse FR-4-derived category rather than exotic low-loss RF material. For many enterprise and industrial boards, that is a pragmatic balance of cost and performance.
The material’s thermal decomposition temperature (Td) is specified above 340 °C and its T260/T288 delamination times are geared for lead-free, high-peak soldering profiles. Designers working with multiple assembly cycles or heavy components can use that headroom to keep reliability while avoiding a jump to far pricier high-speed laminates.
Where engineers will notice the difference
In daily work, KB-6160 is meant to feel predictable rather than spectacular. Fabricators see consistent hole-wall quality when stacking many cores, and CAM engineers get fewer nasty surprises from bow and twist on long, heavy backplanes, particularly in telecom racks.
For OEMs, that translates into quieter failure statistics: fewer latent via cracks that show up after thermal cycling, and more stable impedance on tightly routed differential pairs over the product lifetime. It is the kind of laminate that earns trust by not being talked about in field-return meetings.
Position in Kingboard’s laminate lineup
Kingboard Laminates markets KB-6160 as one of several high-Tg and halogen-free options, sitting below its ultra-low-loss materials but above standard FR-4 in both performance and price. The company’s portfolio ranges from entry-level FR-4 to mid-loss and low-loss grades used in 5G and high-speed computing.
This layering lets PCB designers mix and match within a single supplier: a high-Tg mid-loss core like KB-6160 in thermally stressed areas, combined with more cost-effective FR-4 in benign sections. For Kingboard, that breadth has become a selling point as AI and cloud infrastructure pull demand toward more demanding boards.
Pricing, formats and availability
KB-6160 is supplied as copper-clad laminate and prepreg in standard panel sizes and thicknesses, typically from around 0.2 mm up to 2.4 mm, covering common stack-up needs from compact line cards to thick backplanes. Copper foils in different weights are available to match current-carrying requirements.
Pricing is negotiated B2B and depends heavily on volume, thickness, copper weight and logistics, so there is no public retail-style RRP. In practice, the laminate is sourced by PCB fabricators in Asia and beyond, who then sell finished boards to OEMs in telecom, server and industrial markets across China, Europe and North America.
How it compares to standard FR-4
Compared with standard mid-Tg FR-4, KB-6160 offers significantly higher Tg and Td, lower Z-axis expansion above Tg and more robust delamination resistance during long, hot solder profiles. For designers pushing power density or stacking more layers, that extra margin can be decisive.
The trade-off lies in cost and slightly higher material constants than some high-speed, low-loss laminates. For ultra-fast SerDes lanes at 56G and beyond, OEMs may still pick specialized low-loss grades. But for a large share of enterprise networking and industrial control boards, KB-6160 hits a practical sweet spot.
Why KB-6160 matters for investors
KB-6160 itself will never be a consumer headline, but laminates of this class sit in the quiet middle of the AI and cloud hardware boom. Every new rack of switches, routers or servers means more multi-layer PCBs that need thermally robust materials like this to stay reliable.
Kingboard, through Kingboard Laminates, has been repositioning from a mainly traditional PCB-material supplier toward a key input provider for AI-related hardware, with mainland Chinese investors driving a sharp rally in the laminates unit this year. For equity holders, the depth and relevance of its laminate catalog, including products such as KB-6160, underpin that narrative more than any single flagship sheet of copper-clad glass.
Company context and stock reference
Kingboard builds on a vertically integrated model, stretching from upstream chemical intermediates to copper-clad laminates and finished PCBs for electronics, automotive and industrial customers. The KB-6160 laminate exemplifies how the group quietly adds value inside complex supply chains rather than at the branded device level.
Shares of Kingboard Laminates Holdings Ltd, a core laminate subsidiary of Kingboard Holdings, trade in Hong Kong under stock code 1888, giving investors direct exposure to demand for PCB materials used in networking, computing and AI infrastructure.
KB-6160 laminate - key facts
- Product: KB-6160 high-Tg copper-clad laminate
- Manufacturer: Kingboard Holdings Ltd
- Category: Software/Service/Subscription (engineering material)
- Launch: In market for several years as part of Kingboard’s high-Tg portfolio
- RRP / Price: B2B-negotiated, volume- and spec-dependent, quoted in USD and CNY for international customers
- Availability: Supplied to PCB fabricators primarily in Asia, with finished boards shipped globally for telecom, server and industrial uses
- Target group: PCB fabricators and OEM design teams in networking, data center, telecom and industrial control
- Highlight / USP: High-Tg, high-Td laminate with low Z-axis expansion for thermally demanding multi-layer PCBs
This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.
