Method for preparing graphite film
US12365593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2022 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Mar 13, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing a graphite film includes steps of preparing a carbonized frame carbonized at a temperature Ta, and an aromatic polyimide film or a carbonized film of the aromatic polyimide film carbonized at a temperature Tb, assembling the carbonized frame and the aromatic polyimide film or the carbonized film of the aromatic polyimide film into an intermediary body 1, carbonizing the intermediary body 1 at a temperature Td to produce a carbonized intermediary body, and graphitizing the carbonized intermediary body to produce the graphite film. The temperature Ta is larger than the temperature Tb and the temperature Tb is smaller than the temperature Td. The graphite film has a surface roughness expressed as an arithmetic mean height Sa of less than 18 nm, a thickness of 5 nm or more and less than 10 μm, and an area of 1.0 cm2 or more and less than 500 cm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.