Elephantech Launches World’s Smallest-Class Copper Nanofiller
July 17, 2025, Tokyo, Japan – Japanese deep-tech startup Elephantech has launched its cutting-edge 15 nm class copper nanofiller – the smallest class available globally. This breakthrough makes Elephantech one of the first companies in the world to provide such advanced material for commercial use.
TEM image of Elephantech’s copper nanofiller
Particle size distribution measurement resultSynthesized using Elephantech’s proprietary technology developed over years of R&D, the newly released copper nanofiller consists of ultra-fine, uniformly produced particles averaging 15 nm in size. It exhibits exceptional dispersion stability for over 6 months. In addition to storage stability, the material also enables simplification of process by allowing low-temperature wet reduction at 60℃.
Specifications (Copper nanofiller in semi-solid state)
| Average copper nanoparticle diameter | 15 nm |
| Viscosity | 100 – 1,000 Pa·s (25 °C) |
| Specific gravity | 3.2 – 3.5 g/cm3 |
| Solid content | 55 – 85 wt% |
| Supply form | Provided in glycol ether solvents, adaptable to various other solvents.(Suitable as base material for inks and pastes) |
Supported by these specifications, the copper nanofiller offers excellent features, including high electrical conductivity, low resistivity, and thermal conductivity. Its flexibility across supply formats -from inks to pastes- enables a wide range of applications, such as:
Upon its debut, Elephantech has received significant inquiries and intentions about adopting this best-in-class material in their products and solutions. By elevating the performance standards in its category, the innovative copper nanofiller is poised to help more manufacturers unlock new potential.
Building on its extensive experience in printed circuit board (PCB) development and manufacturing solutions, Elephantech is now expanding the value of its nano-materials portfolio while maintaining its focus on the PCB sector. With a strong foundation in science innovation and a longstanding commitment to sustainability, the company continues to drive momentum to accelerate transformation across the electronics industry.
Inquiries
Elephantech Inc., Business Development Unit, bd@elephantech.co.jpDownload
Elephantech_Cu Nano Filler_BrochureCompany Overview
| Name | Elephantech Inc. |
| Establishment | January 2014 |
| Headquarter | 4-3-8 Hatchobori, Chuo-ku, Tokyo 104-0032, Japan |
| Representative | Shinya Shimizu, Representative Director & CEO |
| Business Description | Development of printed electronics manufacturing technology and provision of related services |
| URL | https:elephantech.com/en/ |