Explore full Nanya NPG-152 laminate specifications including Tg, Td, Dk, Df, and thermal properties. This engineer-focused review covers how NPG-152 compares to NPG-150 and NPG-151, its halogen-free compliance credentials, and the best use cases for HDI, automotive, and high-speed multilayer PCB applications.
Engineers who’ve already worked through the NPG-150 and NPG-151 selection process often end up asking the same follow-up question: where does NPG-152 fit, and is it worth the step up? The Nanya NPG-152 laminate specifications tell an interesting story this is Nanya’s push into halogen-free, high-Tg territory, targeting applications where environmental compliance requirements and thermal performance need to coexist without sacrificing the electrical properties that modern high-speed designs demand.
What Is Nanya NPG-152 Laminate?
NPG-152 is Nanya Plastics Corporation’s halogen-free, high-Tg epoxy laminate. It builds on the same NPG resin chemistry platform as the NPG-150 and NPG-151, but replaces the conventional brominated flame retardant system with a phosphorus-based or nitrogen-based halogen-free flame retardant approach. The result is a material that meets UL 94 V-0 flammability requirements without halogens, while maintaining a Tg of 150簞唬 and competitive electrical properties.
It targets IPC-4101 slash sheet /92 and /98, where /98 specifically covers halogen-free high-Tg materials. This positions NPG-152 for markets and applications where halogen-free compliance is either mandated or strongly preferred European consumer electronics under WEEE/RoHS directives, Japanese market requirements, and increasingly, automotive and telecom OEM specifications that go beyond basic RoHS compliance.
Material Classification Overview
| Property | Specification |
| Material Type | Woven glass / halogen-free modified epoxy |
| IPC-4101 Slash Sheet | /92, /98 |
| Flame Rating | UL 94 V-0 |
| Halogen Content | Cl 900 ppm, Br 900 ppm, total 1500 ppm |
| Tg (DSC method) | 150簞唬 |
| Tg (TMA method) | 140簞唬 |
| Td (Decomposition Temp) | 330簞唬 |
| RoHS Compliant | Yes |
| Halogen-Free | Yes (IEC 61249-2-21) |
Nanya NPG-152 Laminate Specifications: Full Technical Data
This is the section most engineers are actually looking for. Here are the consolidated NPG-152 laminate specifications based on Nanya’s published technical data.
Electrical Properties
| Property | Value | Test Method |
| Dielectric Constant (Dk) at 1 MHz | 4.34.5 | IPC-TM-650 2.5.5 |
| Dielectric Constant (Dk) at 1 GHz | 4.04.2 | IPC-TM-650 2.5.5.9 |
| Dissipation Factor (Df) at 1 MHz | 0.0120.018 | IPC-TM-650 2.5.5 |
| Dissipation Factor (Df) at 1 GHz | 0.0150.020 | IPC-TM-650 2.5.5.9 |
| Surface Resistivity | 10 M峏 | IPC-TM-650 2.5.17 |
| Volume Resistivity | 10 M峏繚cm | IPC-TM-650 2.5.17 |
| Dielectric Breakdown | 40 kV | IPC-TM-650 2.5.6 |
| Electric Strength | 20 kV/mm | IPC-TM-650 2.5.6 |
| CTI | 175 V | IEC 60112 |
Thermal and Mechanical Properties
| Property | Value | Test Method |
| Tg (DSC) | 150簞唬 | IPC-TM-650 2.4.25 |
| Tg (TMA) | 140簞唬 | IPC-TM-650 2.4.24 |
| Td (5% weight loss) | 330簞唬 | IPC-TM-650 2.4.24.6 |
| T-260 | 60 min | IPC-TM-650 2.4.24.1 |
| T-288 | 20 min | IPC-TM-650 2.4.24.1 |
| T-300 | 3 min | IPC-TM-650 2.4.24.1 |
| CTE Z-axis (below Tg) | ~45 ppm/簞C | IPC-TM-650 2.4.24 |
| CTE Z-axis (above Tg) | ~220 ppm/簞C | IPC-TM-650 2.4.24 |
| Flexural Strength (lengthwise) | 415 MPa | IPC-TM-650 2.4.4 |
| Flexural Strength (crosswise) | 345 MPa | IPC-TM-650 2.4.4 |
| Peel Strength (1 oz Cu, after thermal stress) | 1.05 N/mm | IPC-TM-650 2.4.8 |
| Water Absorption | 0.20% | IPC-TM-650 2.6.2 |
The Td of 330簞唬 is the highest in the NPG series, and the water absorption of 0.20% is notably tight. Both numbers reflect the phosphorus-based resin system’s inherent properties halogen-free epoxy systems often deliver better thermal decomposition resistance and lower moisture uptake than their brominated counterparts, which is one reason halogen-free materials have gained traction beyond just regulatory compliance.
NPG-152 vs. NPG-150 vs. NPG-151: Understanding the NPG Series
If you’re trying to figure out which NPG grade to specify, this comparison is the most direct way to see where NPG-152 earns its place.
NPG Series Comparison
| Property | NPG-150 | NPG-151 | NPG-152 |
| Halogen-Free | No | No | Yes |
| Tg (DSC) | 150簞唬 | 150簞唬 | 150簞唬 |
| Td | 310簞唬 | 320簞唬 | 330簞唬 |
| Dk @ 1 MHz | 4.44.6 | 4.24.4 | 4.34.5 |
| Df @ 1 MHz | 0.0180.022 | 0.0150.020 | 0.0120.018 |
| T-288 | 15 min | 20 min | 20 min |
| CTE Z (below Tg) | ~50 ppm/簞C | ~4550 ppm/簞C | ~45 ppm/簞C |
| Water Absorption | 0.30% | 0.25% | 0.20% |
| IPC-4101 Slash Sheet | /92, /94 | /92, /94 | /92, /98 |
| Relative Cost | Moderate | Moderate-High | Higher |
The Df improvement in NPG-152 (0.0120.018 at 1 MHz) is the most notable electrical upgrade over NPG-151. Lower dissipation factor means less dielectric loss at high frequencies, which translates directly to better signal integrity on long, high-speed traces. For designs pushing into multi-gigabit territory, this is a real advantage.
Best Use Cases for Nanya NPG-152 Laminate
Understanding the NPG-152 laminate specifications in isolation is only half the job knowing where to actually deploy it is what matters in practice.
Applications Where NPG-152 Makes Sense
Halogen-Free Compliance-Driven Markets
Any product targeting the Japanese market, certain European OEM supply chains, or customers with explicit halogen-free material requirements needs a material like NPG-152. Basic RoHS compliance doesn’t require halogen-free laminate that’s a common misconception. Halogen-free is a separate, more stringent requirement, and NPG-152 meets IEC 61249-2-21 which is the standard reference for halogen-free base materials.
High-Speed Multilayer Boards
The combination of low Df (0.0120.018) and moderate Dk (4.34.5) makes NPG-152 a reasonable choice for multilayer boards with signal channels operating in the 15 GHz range. It’s not a substitute for genuine low-loss materials like Rogers 4350B or Megtron 6 at higher frequencies, but for PCIe Gen 4, 10GbE, and similar applications, it delivers adequate channel performance at a fraction of the cost of specialty laminates.
Telecom and Networking Infrastructure
Base station boards, switching equipment, and server backplanes increasingly specify halogen-free materials. NPG-152’s thermal robustness (T-288 20 min, Td 330簞唬) handles the thermal demands of dense multilayer telecom boards, while the halogen-free chemistry satisfies OEM environmental requirements.
Automotive Electronics
For automotive applications where both AEC-Q200 alignment and halogen-free compliance are required increasingly common in European automotive supply chains NPG-152 covers both bases. The low CTE Z-axis (~45 ppm/簞C) and high Td support the thermal cycling and lead-free assembly requirements of automotive-grade boards.
If you’re working with a fabricator that sources Nanya PCB materials, NPG-152 is worth discussing specifically for halogen-free multilayer builds where you don’t want to compromise on thermal or electrical performance.
Processing Nanya NPG-152 in Multilayer Fabrication
Halogen-free laminates have a reputation for being more demanding to process than conventional brominated FR-4, and there’s some truth to that but it’s manageable with the right process parameters.
Key Processing Considerations
| Process Step | Standard FR-4 | NPG-152 Notes |
| Lamination temperature | Standard | May require slightly higher cure temp |
| Drill parameters | Standard | Similar to NPG-150/151 |
| Desmear | Standard chemistry | Verify dwell time for halogen-free resin |
| Lead-free reflow | Marginal (std FR-4) | Good T-288 20 min |
| Storage conditions | 23簞C, 50% RH | Same halogen-free prepreg can be moisture-sensitive |
| Shelf life (prepreg) | 6 months | 6 months from manufacture date |
The desmear step deserves attention. Halogen-free epoxy systems can have different smear characteristics compared to brominated systems, and inadequate desmear leads to poor via wall adhesion and reliability issues. Work with your fabricator to confirm their desmear process is qualified for halogen-free materials before committing to production.
Useful Resources for Engineers
official NPG-152 datasheet and halogen-free product documentation
base material specification; slash sheet /98 covers halogen-free high-Tg materials
the reference standard for halogen-free base materials for PCBs
test methods referenced throughout NPG-152 datasheet
qualification and performance specification for rigid PCBs
verify UL 94 V-0 and halogen-free certification status
EU waste electrical and electronic equipment directive context for halogen-free requirements
FAQs About Nanya NPG-152 Laminate Specifications
Q: Does RoHS compliance require halogen-free laminate like NPG-152?
No this is a common misconception. RoHS restricts specific hazardous substances (lead, mercury, cadmium, hexavalent chromium, PBB, PBDE) but does not ban all halogens. Brominated flame retardants used in standard FR-4 are not currently restricted under RoHS. Halogen-free is a separate, voluntary or customer-driven requirement. NPG-152 satisfies both RoHS and halogen-free requirements, but you only need NPG-152 specifically if halogen-free is a stated requirement.
Q: How does NPG-152’s Df compare to mid-range low-loss materials like Megtron 6 or Rogers 4350B?
NPG-152’s Df of 0.0120.018 at 1 MHz is better than standard FR-4 but still significantly higher than genuine low-loss materials. Megtron 6 delivers Df around 0.0020.004 at 10 GHz, and Rogers 4350B is around 0.0037 at 10 GHz. NPG-152 is appropriate for multi-gigabit digital designs up to roughly 56 GHz. Above that, you need a purpose-built low-loss material.
Q: Can NPG-152 be used in mixed-material stack-ups with standard FR-4 cores?
Technically possible, but generally not recommended. Mixing halogen-free and brominated materials in the same stack-up creates complications for recycling and end-of-life compliance, and the different resin systems can have slightly different lamination behavior. If halogen-free compliance is the driver, use NPG-152 throughout the stack-up.
Q: What copper foil options are available with NPG-152?
Standard offerings include 翻 oz (17.5 繕m), 1 oz (35 繕m), and 2 oz (70 繕m) electrodeposited copper. Low-profile and very low-profile copper foil options may be available for high-frequency applications confirm with Nanya or your laminate distributor for specific availability.
Q: Is NPG-152 suitable for via-in-pad designs in HDI boards?
Yes. The combination of low CTE Z-axis (~45 ppm/簞C), high Td (330簞唬), and low water absorption (0.20%) makes NPG-152 a solid choice for via-in-pad HDI constructions. The thermal stability during reflow and the moisture resistance both contribute to reliable via fill and cap plating processes.
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Explore full Nanya NPG-152 laminate specifications including Tg, Td, Dk, Df, and thermal properties. This engineer-focused review covers how NPG-152 compares to NPG-150 and NPG-151, its halogen-free compliance credentials, and the best use cases for HDI, automotive, and high-speed multilayer PCB applications.