Isola Tachyon 100G PCB Material: Full Technical Guide for 100Gbps High-Speed Digital Designs

Ask any signal integrity engineer who’s been designing switch fabric backplanes or 400G Ethernet line cards for the past decade to name their go-to ultra-low loss laminate, and the same answer comes up more often than any other: Isola Tachyon 100G. That’s not brand loyalty — it’s the result of a material that genuinely delivers on its promise at speeds where most laminates simply fall apart.

The PCB industry crossed 100 Gbps as a production reality sometime around 2016–2018. What the industry quickly discovered was that the materials doing reasonable work at 10 Gb/s were catastrophically lossy by the time channels scaled to 25 Gb/s per lane and beyond. Tachyon 100G was specifically engineered for that inflection point, and it has remained a benchmark product in the ultra-low loss laminate category ever since. This guide gives you everything you need to evaluate, specify, and successfully design with it — written from the bench, not the brochure.

What Is Isola Tachyon 100G?

Isola Tachyon 100G is an ultra-low loss laminate and prepreg engineered for high-speed digital applications at data rates of 100 Gb/s and beyond. It is part of Isola Group’s high-speed digital product line and sits at the premium end of their non-halogen-free portfolio, occupying the role of the go-to material when insertion loss is the binding constraint and the design can’t afford to leave any dB on the table.

The material was developed as a direct successor and thermal upgrade to the original Isola Tachyon product. Both share identical electrical characteristics, but Tachyon 100G brings a 30% improvement in Z-axis coefficient of thermal expansion (CTE) performance specifically to address the reliability challenges of high-layer-count line cards with multiple 2 oz. copper planes and fine-pitch BGA packages. That combination — identical electrical performance but dramatically better thermal mechanical reliability — is what moved data center equipment designers from Tachyon to Tachyon 100G as the default material for their most demanding boards.

Tachyon 100G materials exhibit exceptional electrical properties that are very stable over a broad frequency and temperature range between −55°C and +125°C up to 100 GHz, providing designers a scalable solution for next-generation backplane and daughter card designs and enabling 10× improvements from 10 Gb/s data rates.

The product is classified under Isola’s High Speed Digital, High Thermal Reliability, and High Density Interconnect categories — a triple classification that reflects how comprehensively the material was engineered.

Isola Tachyon 100G: Complete Specifications

Before running a signal integrity simulation or writing a stackup specification, these are the numbers that matter. All data is sourced from Isola’s published datasheets (Revision G, 2025).

Core Electrical Properties

Parameter	Value	Frequency	Test Method
Dielectric Constant (Dk)	3.02	5 GHz	Bereskin Stripline
Dielectric Constant (Dk)	3.02	10 GHz	Bereskin Stripline
Dissipation Factor (Df)	0.0021	2 GHz	IPC-TM-650
Dissipation Factor (Df)	0.0021	5 GHz	IPC-TM-650
Dissipation Factor (Df)	0.0021	10 GHz	IPC-TM-650
Dk Stability vs. Frequency	Stable 1–40 GHz+	—	—
Dk Stability vs. Temperature	Stable −55°C to +125°C	—	—

The Dk of 3.02 is among the lowest in the FR-4 process-compatible laminate category. More importantly, it is genuinely flat from 1 GHz to beyond 40 GHz — not “approximately flat” as is common in datasheets for more modest materials. This frequency stability is critical for broadband channel modeling in SI simulations, where a Dk that drifts with frequency makes accurate channel prediction at 56 Gbaud PAM4 essentially impossible.

Thermal and Mechanical Properties

Parameter	Value	Test Method
Glass Transition Temperature (Tg)	215°C	DSC
Glass Transition Temperature (Tg)	185°C	TMA
Glass Transition Temperature (Tg)	220°C	DMA
Decomposition Temperature (Td)	360°C	TGA @ 5% wt. loss
Z-axis CTE (50–260°C, total)	2.5%	IPC-TM-650
X/Y-axis CTE (before Tg)	15 ppm/°C	IPC-TM-650
T-260	>60 minutes	IPC-TM-650 2.4.24.1
T-288	>60 minutes	IPC-TM-650 2.4.24.1
T-300	>20 minutes	IPC-TM-650 2.4.24.1
Thermal Conductivity	0.42 W/m·K	—
Water Absorption	0.05%	IPC-TM-650

That Tg of 215°C by DSC is the highest among Isola’s high-speed digital material lineup — 15°C above I-Tera MT40 and 35°C above I-Speed. For a board running 6× lead-free reflow cycles at 260°C, that Tg headroom is real manufacturing margin that reduces risk of board failures during assembly.

Mechanical Properties

Parameter	Value	Direction	Test Method
Peel Strength	0.79 N/mm (4.5 lb/in)	—	IPC-TM-650 2.4.8C
Peel Strength (after thermal stress)	0.96 N/mm (5.5 lb/in)	—	IPC-TM-650 2.4.8.2A
Flexural Strength	303 MPa (44.0 kpsi)	Lengthwise	IPC-TM-650 2.4.4B
Flexural Strength	283 MPa (41.0 kpsi)	Crosswise	IPC-TM-650 2.4.4B
Tensile Strength	207 MPa (30.0 kpsi)	Lengthwise	ASTM D3039
Tensile Strength	172 MPa (25.0 kpsi)	Crosswise	ASTM D3039
Electric Strength	60 kV/mm (1500 V/mil)	—	2.5.6.2A
Arc Resistance	125 seconds	—	IPC-TM-650 2.5.1B

Compliance and Certifications

Certification / Standard	Status
UL File Number	E41625
RoHS	Compliant
UL94 Flammability	V-0
IPC-4103	/17
Lead-Free Assembly	Compatible
CAF Resistance	Demonstrated
HDI Compatibility	Yes
FR-4 Process Compatible	Yes

The Engineering Design Behind Tachyon 100G’s Performance

H3: HVLP (VLP2) Ultra-Smooth Copper Foil — 2 µm Rz

Every signal integrity engineer working above 10 GHz knows that the copper surface isn’t just a conductor — it’s a signal loss mechanism. The skin effect drives current increasingly close to the conductor surface as frequency rises, and any roughness on that surface creates an effectively longer current path that shows up as insertion loss. At 28 GHz, where skin depth in copper is approximately 0.4 µm, a foil with 6–8 µm Rz surface peaks is presenting 15–20× skin depth variations to the current — and every peak is an energy sink.

Tachyon 100G uses ultra-smooth HVLP (VLP2) copper foil with 2 µm Rz surface roughness. That <2.0 µm Rz represents a 3–4× improvement in surface smoothness compared to standard HTE (High-Temperature Elongation) foil used in conventional FR-4 laminates. The result is a material where conductor losses at 28 GHz are measured in fractions of a dB/inch rather than full dB/inch values — a difference that becomes the margin between a system that passes BER requirements and one that requires additional signal conditioning.

Isola specifically notes that the use of ultra-smooth copper is enabled by the very high adhesive bond between the resin and the metal — meaning the resin system was engineered alongside the copper foil specification, not just selected from a catalog.

H3: Spread Glass Architecture for Skew Control and Eye Width

Standard plain-weave glass fabrics create a well-known problem for differential pairs: the fiber weave effect. Because glass (Dk ≈ 6.0) and resin (Dk ≈ 2.8–3.0) have substantially different dielectric constants, a differential pair routed at a typical angle to the weave can have one trace sitting mostly over glass and the other mostly over resin. The result is asymmetric propagation velocity — a timing difference between the + and − traces of a differential pair — that worsens with trace length and frequency. At 56 Gbaud, even 2–3 ps of intra-pair skew degrades BER measurably.

Tachyon 100G uses spread glass (mechanically spread glass weave) in both directions. Spread weave pulls the glass bundles apart laterally, distributing the fiber more uniformly across the panel. This reduces the periodic Dk variation that causes the fiber weave effect, which in Tachyon 100G delivers direct improvements in rise times, jitter reduction, and eye width and height on high-speed differential channels. All Tachyon 100G glass is spread weave in both directions — this is not a selective feature for premium constructions; it’s standard across the product.

H3: The Resin System — Why Z-Axis CTE Matters

The 30% improvement in Z-axis CTE that Tachyon 100G delivers over the original Tachyon is not an abstract specification — it is a board-level reliability factor that determines whether your high-layer-count line card survives its operating life in the field.

Z-axis expansion occurs every time a PCB is thermally cycled. For a 50-layer line card with multiple 2 oz. copper planes and 0.8 mm pitch BGAs containing thousands of microvias, the cumulative stress from Z-axis expansion across thousands of power cycles can cause barrel cracking in plated through-holes (PTHs), pad cratering around BGA balls, and microvia delamination. Lower Z-axis CTE means less expansion per thermal cycle, directly translating to longer field life and better IPC Class 3 reliability margins.

The Tachyon 100G Z-axis total expansion of 2.5% (50–260°C) is competitive with the best laminates in the FR-4 process-compatible category, and specifically optimized for the thermal environment of high-layer-count server line cards and networking equipment running continuous duty cycles in data center environments.

Isola Tachyon 100G: Comprehensive Prepreg and Core Construction Data

Isola provides construction-level Dk/Df tables for Tachyon 100G, and these are the numbers you should be feeding into your signal integrity models — not just the headline datasheet values. The construction Dk varies with resin content and glass style, and for critical channels at 56 Gbaud PAM4, using the construction-level Dk can mean the difference between a simulation that accurately predicts channel behavior and one that’s off by 3–5% in Dk — which at 10 inches of trace length translates to noticeable propagation delay and impedance errors.

Representative Prepreg Constructions (from Dk/Df Table, Rev. L, July 2025)

Glass Style	Resin Content	Thickness (in/mm)	Dk (1–20 GHz)	Df (1–20 GHz)
1×1067	66.5%	0.0020 / 0.051	3.05	0.0017
1×1035	73.5%	0.0025 / 0.064	2.97	0.0014
1×1078	66.0%	0.0030 / 0.076	3.09	0.0018
3×3313	62.5%	0.0140 / 0.356	3.15	0.0020
4×2116	57.0%	0.0200 / 0.508	3.25	0.0022
7×3313	58.5%	0.0280 / 0.711	3.24	0.0022

The spread weave constructions with higher resin content show lower Dk — because the glass Dk is higher than the resin Dk, more resin means lower composite Dk. This is a fundamental principle for stackup planning: if you need to reduce Dk for impedance control, select a prepreg construction with higher resin content. Coordinate with your fabricator on specific construction selection before finalizing your controlled impedance trace widths.

Where Isola Tachyon 100G Excels: Target Applications

H3: 400G and 800G Ethernet Switch Fabric Boards

The hyperscale data center switch is arguably the primary design target for Tachyon 100G. A 64-port 400G leaf switch with an 800G Ethernet line rate runs 128 SerDes lanes at 56 Gbaud PAM4 across board traces that may reach 15–20 inches in the switch ASIC package. At those speeds and distances, the Df of 0.0021 determines whether the insertion loss budget closes without requiring additional retimer ASICs on every channel — which would add $10–20 per channel and substantial power consumption.

Data center operators and hyperscalers have driven significant adoption of Tachyon 100G for 400G Ethernet switches and next-generation AI/ML accelerator boards. That’s not coincidental — at the speeds where these systems operate, Tachyon 100G’s combination of Dk 3.02 and Df 0.0021 represents the best performance available in a material that processes like FR-4.

H3: High-Layer-Count Backplanes for Networking Infrastructure

Backplanes in core network routers and modular chassis switches represent the hardest signal integrity problem in PCB design. You have maximum trace length, multiple connector launches each adding 0.5–1.5 dB of loss, 30–50 layer constructions, and 0.8 mm BGA pitches that put maximum demand on the via structure. This is exactly the scenario that Tachyon 100G was built for — the material specifically targets line cards and backplanes that require the highest thermal performance with its 30% improvement in Z-axis CTEs, making it a perfect choice for higher layer line cards that have multiple 2 oz. planes and BGAs with pitches at 0.8 mm or less.

H3: AI and Machine Learning Accelerator Boards

The explosion in large language model (LLM) training workloads has pushed GPU interconnect boards, HBM memory interface PCBs, and NVLink/CXL fabric boards into territory that only ultra-low-loss materials can handle. AI training cluster boards commonly run PCIe Gen 5 at 32 Gbaud across trace lengths of 12–18 inches, and NVLink 4.0 at 50 Gbaud puts even harder demands on the substrate. For ISOLA PCB fabrication of AI accelerator boards, Tachyon 100G has become the standard specification for designs requiring maximum signal reach without external retimers.

H3: Aerospace and Defense High-Speed Digital Systems

Aerospace and defense applications list consistently among Tachyon 100G’s typical market applications — specifically computing, storage, and peripherals, and networking and communication systems. Defense electronics often combine the highest speed digital requirements with the toughest environmental conditions: wide temperature ranges, vibration exposure, and 20+ year design life requirements. Tachyon 100G’s Dk stability from −55°C to +125°C, Tg of 215°C, and CTE compatibility with Isola’s Astra MT77 (enabling hybrid construction with an RF/microwave material on the same board) make it a strong choice for radar processor boards, secure communication equipment, and software-defined radio hardware.

H3: Hybrid RF/Digital Boards with Astra MT77

The Microwave Journal reported from IMS2023 that Tachyon 100G exhibits thermal behavior closely matched to Isola’s Astra MT77, as evidenced by their similar CTE values across the −55 to +125°C operating range, making Astra MT77 and Tachyon 100G good candidates for hybrid PCBs where one material holds RF/microwave circuits and the other handles high-speed digital circuits.

This hybrid capability is genuinely valuable for 5G base station designs, phased array radar boards, and satellite communication systems where an RF front-end (natural home for Astra MT77) feeds into a high-speed digital processing section (natural home for Tachyon 100G). The thermal compatibility prevents the differential CTE mismatch warpage and delamination that plague mismatched hybrid constructions.

H3: High-Speed Storage and PCIe Gen 4/5/6 Boards

PCIe Gen 5 at 32 Gbaud and PCIe Gen 6 at 64 Gbaud represent another strong use case for Tachyon 100G, particularly in server root complex boards, storage controllers, and PCIe switch cards where trace lengths from root complex to edge connector can reach 12–16 inches. The stable Dk across frequency is critical here — PCIe equalization algorithms depend on relatively predictable channel behavior, and a substrate with Dk that drifts significantly with frequency introduces equalization modeling errors that can translate to unexpected BER failures at the edge of the operating envelope.

Tachyon 100G vs. the Competition: Honest Material Comparison

This is the table engineers actually need when defending a material selection to a program manager or qualifying an alternate.

Material	Manufacturer	Dk (10 GHz)	Df (10 GHz)	Tg (DSC)	Halogen-Free	FR-4 Process
Tachyon 100G	Isola	3.02	0.0021	215°C	No	Yes
TerraGreen 400G2	Isola	3.10	0.0015	200°C	Yes	Yes
TerraGreen 400G	Isola	3.15	0.0017	200°C	Yes	Yes
I-Tera MT40	Isola	3.45	0.0031	215°C	No	Yes
I-Speed	Isola	3.63	0.0060	180°C	No	Yes
Astra MT77	Isola	2.97	0.0017	200°C	No	Yes
Megtron 6	Panasonic	3.40	0.0020	185°C	Yes	Yes
Megtron 7	Panasonic	3.37	0.0017	185°C	Yes	Yes
Rogers RO4350B	Rogers	3.48	0.0037	280°C	No	Partial

A few things stand out from this comparison. Tachyon 100G’s Tg of 215°C is the highest in Isola’s high-speed digital material line, giving it the best thermal margin for lead-free assembly of any of these options. Its Dk of 3.02 is lower than anything in the FR-4 compatible category except Astra MT77, which is an RF specialist and not designed for high-speed digital. The Df of 0.0021 beats all the halogen-free options in the family except for the newer TerraGreen 400G and 400G2 — but those came to market nearly a decade after Tachyon 100G and represent a different product generation.

Against Panasonic Megtron 7, Tachyon 100G holds competitive Df performance while offering a higher Tg and the manufacturing supply chain advantages that come from Isola’s global laminate manufacturing network. The choice often comes down to approved vendor list at the fab, regional supply chain preference, and which material your SI team has more characterization data for.

One critical note for halogen-free program requirements: Tachyon 100G is not halogen-free. If your design must meet IEC 61249-2-21 halogen-free requirements, the TerraGreen 400G or 400G2 are the appropriate Isola alternatives, though they were introduced later and have a shorter qualification history in volume production.

Isola Tachyon 100G vs. I-Speed and I-Tera MT40: When to Step Up

A question that comes up constantly on program material selection reviews is whether to use I-Speed, I-Tera MT40, or Tachyon 100G. The answer is straightforward once you frame it in terms of channel loss budgets.

Signal Speed	Recommended Material	Reasoning
Up to 10 Gbps	I-Speed (Df ~0.006)	Loss budget is relaxed; no need for premium laminate
10–25 Gbps	I-Tera MT40 (Df ~0.0031)	Moderate loss budget; good cost/performance
25–56 Gbaud NRZ	I-Tera MT40 or Tachyon 100G	Depends on trace length and channel architecture
56 Gbaud PAM4 and above	Tachyon 100G	Tightest insertion loss budgets; maximum channel reach
100 Gbaud and beyond	Tachyon 100G	No FR-4-compatible alternative at this loss level

The guidance from PCBSync is clear: Tachyon 100G with Df of 0.0021 is optimized for 100 Gbps and beyond. Over-specifying material drives up costs without adding value — if your fastest signals are 5 Gbps, you don’t need Tachyon 100G. Match the material to the channel requirement and document the rationale.

PCB Design and Stackup Guidelines for Tachyon 100G

H3: Use Construction-Level Dk/Df — Not the Headline Number

The headline Dk of 3.02 in the marketing datasheet represents the nominal value at a specific test frequency and construction. Actual construction Dk varies meaningfully from 2.97 (high resin content 1×1035 prepreg) to 3.25 (4×2116 thick core). For 56 Gbaud or 112 Gbaud channels, feeding your 2D field solver the wrong Dk translates directly to incorrect impedance predictions and S-parameter models that don’t match physical board measurements. Download Isola’s current Dk/Df construction tables (Revision L, July 2025) and use the values for your specific glass style and resin content.

H3: Surface Roughness Correction in Your Loss Models

Even with HVLP (VLP2) 2 µm Rz copper, surface roughness correction is required in your loss models at 28 GHz and above. Modern 2D field solvers support Hammerstad-Jensen, Huray snowball, or Causal Power Law (Cannonball-Huray) surface roughness models. For Tachyon 100G with VLP2 foil, the Huray model with an appropriate surface ratio parameter provides the best fit to measured insertion loss data. Leaving roughness correction off will leave your conductor loss estimate 15–25% optimistic at 28 GHz, which compounds across long traces into multi-dB prediction errors.

H3: Via Design for 56 Gbaud and Above

At 56 Gbaud PAM4, via stubs create resonances in the signal bandwidth that can produce sharp notches in insertion loss — sometimes 5–10 dB at the resonant frequency, which may fall directly in the Nyquist bandwidth. For through-hole vias in thick stackups, back-drilling to within 5–7 mils of the signal layer is standard practice. Via-in-pad with electroplated fill and cap plating eliminates the stub entirely for package via fields where back-drilling is impractical. Plan these via treatments before layout begins; retrofitting them to a completed layout is expensive.

H3: Hybrid Stackup Planning with Astra MT77

When combining Tachyon 100G with Astra MT77 in a hybrid board, confirm core and prepreg constructions with your fabricator before finalizing the stackup. The CTE compatibility between the two materials is one of the documented design advantages, but actual panel-level dimensional stability in a hybrid construction is sensitive to the specific lay-up sequence, the copper balance between layers, and the press cycle parameters your fabricator uses. Early fab engagement on hybrid constructions — before the stackup is locked — saves significant NPI rework.

H3: CAF Resistance at Fine BGA Pitches

Tachyon 100G carries demonstrated CAF resistance, which is relevant for boards with 0.8 mm or finer BGA pitches running under continuous bias. CAF resistance depends not only on the resin system but on via registration, plating quality, and inner layer oxide treatment. The material provides the substrate-level foundation for CAF resistance, but realizing it in production requires consistent process control at the fabricator.

Useful Resources for Isola Tachyon 100G

The following links provide direct access to datasheets, product pages, construction tables, and engineering tools you need when working with Tachyon 100G.

• Isola Tachyon 100G Official Product Page — Overview, constructions, and documentation downloads (Rev. G, 2025)
• Tachyon 100G Laminate & Prepreg Datasheet PDF — Complete mechanical, thermal, and electrical property tables
• Tachyon 100G Dk/Df Construction Tables PDF — Full prepreg and core Dk/Df values by glass style and resin content (Rev. L, July 2025)
• Isola High-Speed Digital Material Portfolio — Cross-product Dk/Df comparison across Tachyon 100G, I-Tera MT40, I-Speed, TerraGreen 400G, FR408HR
• Isola IsoStack Stackup Design Tool — Free online tool for Tachyon 100G stackup modeling with construction-level Dk values
• ISOLA PCB Fabrication Guide at PCBSync — Practical Isola laminate selection and application guide for engineers
• PCB Directory — Tachyon 100G Product Listing — Third-party specs database and distributor cross-reference
• Isola IMS2023 Technical Coverage — Microwave Journal — Independent technical reporting on Tachyon 100G performance at mmWave and hybrid PCB applications
• IPC-4103 Standard — Base specification for slash sheet /17, which governs Tachyon 100G material qualification
• Isola Tachyon 100G Processing Guide — Fabrication process guidance applicable to the Tachyon family

Frequently Asked Questions About Isola Tachyon 100G

FAQ 1: What is the difference between Isola Tachyon and Tachyon 100G?

Both products share identical electrical characteristics — Dk 3.02 and Df 0.0021 — and use the same spread-weave glass and ultra-smooth VLP copper foil. The defining difference is thermal performance: Tachyon 100G offers a 30% improvement in Z-axis CTE compared to the original Tachyon. That improvement was introduced specifically to address the reliability challenges of high-layer-count line cards with multiple 2 oz. copper planes and 0.8 mm pitch BGAs, where lower Z-axis expansion directly reduces via barrel cracking and pad cratering failure rates over the product lifetime. The original Tachyon remains in the Isola catalog for designs that don’t require the enhanced Z-axis performance, but Tachyon 100G is the default choice for new designs today.

FAQ 2: Is Isola Tachyon 100G halogen-free?

No. Tachyon 100G is not a halogen-free material and does not meet IEC 61249-2-21 requirements. It is RoHS compliant and lead-free assembly compatible, but if your design requires halogen-free compliance — for European market WEEE/RoHS extended substance requirements, customer environmental specifications, or internal corporate sustainability policies — the appropriate Isola alternatives within the ultra-low loss category are TerraGreen 400G (Df 0.0017) or TerraGreen 400G2 (Df 0.0015), both of which were introduced in 2023. These materials actually achieve lower Df than Tachyon 100G at high frequencies while meeting halogen-free compliance, though they have a shorter qualification history in volume production.

FAQ 3: Can Tachyon 100G be processed in a standard PCB fabrication shop?

Yes — one of Tachyon 100G’s key engineering decisions was FR-4 process compatibility. It uses standard drilling feeds and speeds, standard aqueous dry film imaging compatible with both cupric chloride and ammoniacal etchants, and standard lamination press cycles with compatible FR-4 type methods. Unlike PTFE-based RF laminates, which require specialized plasma desmear, dedicated drill bits, and exotic etch chemistries, Tachyon 100G can be processed at any competent PCB fabricator running a standard multilayer production line. This compatibility significantly broadens the approved vendor list and reduces supply chain concentration risk for volume programs.

FAQ 4: What copper foil options are available with Tachyon 100G, and how do I choose?

Tachyon 100G is available with multiple copper foil types: HVLP (VLP2) at 2 µm Rz, standard Low Profile (LP), and standard HTE Grade 3. For any application at 5 Gbaud or above, HVLP (VLP2) is the appropriate choice — the conductor loss advantage of 2 µm Rz foil over standard HTE (6–8 µm Rz) is significant enough at 10 GHz and above that choosing standard foil largely negates the benefit of paying for an ultra-low loss substrate. The HVLP foil is standard for high-speed digital applications and is what the material’s electrical performance claims are based on. Standard profile foil options exist for applications where cost is the primary driver and operating frequency is below approximately 3 GHz.

FAQ 5: How does Tachyon 100G compare to Panasonic Megtron 6 for 400G switch applications?

The comparison is competitive. Megtron 6 has Dk of 3.40 and Df of 0.0020 at 10 GHz — slightly higher Dk than Tachyon 100G (3.02) but very similar Df. The higher Dk of Megtron 6 means slightly narrower traces for a given impedance target and marginally faster propagation velocity per unit dielectric thickness. The practical performance difference at 56 Gbaud across 15 inches of trace is modest — typically less than 0.5 dB of insertion loss difference. The decision between them on a 400G switch project usually comes down to which material your PCB fabricator is qualified to run, supply chain lead times, and which material your SI team has validated against physical board measurements. Tachyon 100G has the advantage of longer production history and a wider global fabricator qualification base; Megtron 6 is sometimes preferred in Asian supply chains where Panasonic materials are well-stocked.

Making the Case for Isola Tachyon 100G in Your Design

Isola Tachyon 100G has earned its place as one of the most specified ultra-low loss laminates in production for a reason that has nothing to do with marketing. Dk 3.02 stable from 1 GHz to 100 GHz. Df 0.0021 that doesn’t degrade with frequency. HVLP VLP2 copper at 2 µm Rz that minimizes conductor loss through the skin depth range of 5G and data center operating frequencies. Spread-weave glass that reduces fiber weave induced skew and jitter. And a Tg of 215°C with 30% improved Z-axis CTE that makes it the thermally reliable foundation for the most demanding high-layer-count line cards in production.

Whether you’re designing a 400G spine switch for a hyperscale data center, a 50-layer backplane for a core router, an AI training cluster GPU interconnect board, or a hybrid radar/digital processor for a defense system, Tachyon 100G delivers at the speeds and reliability levels these systems require. When your SI simulation says the channel closes with Dk 3.02 and Df 0.0021, and your BOM and supply chain can support it, Tachyon 100G is the specification to write.