IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0707047
(2012-12-06)
|
등록번호 |
US-8597606
(2013-12-03)
|
발명자
/ 주소 |
- Nishikawa, Yasushi
- Murakami, Mutsuaki
- Akahori, Kiyokazu
|
출원인 / 주소 |
|
대리인 / 주소 |
Marshall, Gerstein & Borun LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
A process for producing a filmy graphite includes the steps of forming a polyimide film having a birefringence of 0.12 or more and heat-treating the polyimide film at 2,400° C. or higher.
대표청구항
▼
1. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 3,000° C. or lower, wherein the filmy graphite has a ratio of electrical resistance at 77 K to that at room temperature of 0.8 or less. 2. The met
1. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 3,000° C. or lower, wherein the filmy graphite has a ratio of electrical resistance at 77 K to that at room temperature of 0.8 or less. 2. The method according to claim 1, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 3. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 3,000° C. or lower, wherein the filmy graphite has a thickness of 10.6 μm or more and 20 μm or less, and has a ratio of electrical resistance at 77 K to that at room temperature of 0.8 or less. 4. The method according to claim 3, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 5. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 3,000° C. or lower, wherein the filmy graphite has a ratio of electrical resistance at 4 K to that at room temperature of 0.4 or less. 6. The method according to claim 5, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 7. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 3,000° C. or lower, wherein the filmy graphite has a thickness of 10.6 μm or more and 20 μm or less, and has a ratio of electrical resistance at 4 K to that at room temperature of 0.4 or less. 8. The method according to claim 7, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 9. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 2,800° C. or lower, wherein the filmy graphite has a ratio of electrical resistance at 77 K to that at room temperature of 0.9 or less. 10. The method according to claim 9, wherein the filmy graphite has an electrical conductivity of 13,000 S/cm or more. 11. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 2,800° C. or lower, wherein the filmy graphite has a thickness of 10.3 μm or more and 21 μm or less, and has a ratio of electrical resistance at 77 K to that at room temperature of 0.9 or less. 12. The method according to claim 11, wherein the filmy graphite has an electrical conductivity of 13,000 S/cm or more. 13. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 2,800° C. or lower, wherein the filmy graphite has a ratio of electrical resistance at 4 K to that at room temperature of 0.75 or less. 14. The method according to claim 13, wherein the filmy graphite has an electrical conductivity of 13,000 S/cm or more. 15. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 2,800° C. or lower, wherein the filmy graphite has a thickness of 10.3 μm or more and 21 μm or less, and has a ratio of electrical resistance at 4 K to that at room temperature of 0.75 or less. 16. The method according to claim 15, wherein the filmy graphite has an electrical conductivity of 13,000 S/cm or more. 17. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 12.5 μm or more and 25 μm or less at 3,000° C. or lower, wherein the filmy graphite has a thermal conductivity of 1,767 W/m·K or more. 18. The method according to claim 17, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 19. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 3,000° C. or lower, wherein the filmy graphite has a thickness of 4.9 μm or more and 10.6 μm or less, and has a thermal conductivity of 1,767 W/m·K or more. 20. The method according to claim 19, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 21. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 12.5 μm or more and 25 μm or less at 2,800° C. or lower, wherein the filmy graphite has a thermal conductivity of 1,481 W/m·K or more. 22. The method according to claim 21, wherein the filmy graphite has an electrical conductivity of 13,500 S/cm or more. 23. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 2,800° C. or lower, wherein the filmy graphite has a thickness of 5.0 μm or more and 10.3 μm or less, and has a thermal conductivity of 1,481 W/m·K or more. 24. The method according to claim 23, wherein the filmy graphite has an electrical conductivity of 13,500 S/cm or more. 25. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 3,000° C. or lower, wherein the filmy graphite has a thermal conductivity of 1,760 W/m·K or more. 26. The method according to claim 25, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 27. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 3,000° C. or lower, wherein the filmy graphite has a thickness of 0.6 μm or more and 20 μm or less, and has a thermal conductivity of 1,760 W/m·K or more. 28. The method according to claim 27, wherein the filmy graphite has an electrical conductivity of 20,000 S/cm or more. 29. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film having a thickness of 25 μm or more and 50 μm or less at 2,800° C. or lower, wherein the filmy graphite has a thermal conductivity of 1,398 W/m·K or more, and an electrical conductivity of 13,0000 S/cm or more. 30. A method for producing a filmy graphite comprising the step of heat-treating a polyimide film at 2,800° C. or lower, wherein the filmy graphite has a thickness of 10.3 μm or more and 21 μm or less, and has a thermal conductivity of 1,398 W/m·K or more. 31. The method according to claim 30, wherein the filmy graphite has an electrical conductivity of 13,000 S/cm or more.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.