US 11,745,463 B2
Multilayer graphite sheet with excellent electromagnetic shielding capability and thermal conductivity and manufacturing method therefor
Jung Doo Seo, Gyeonggi-do (KR); Hoon Kim, Gyeonggi-do (KR); Jung-Gyu Kim, Gyeonggi-do (KR); and Jonggab Baek, Gyeonggi-do (KR)
Assigned to SKC CO., LTD., Gyeonggi-do (KR)
Appl. No. 17/51,947
Filed by SKC CO., LTD., Gyeonggi-do (KR)
PCT Filed May 3, 2019, PCT No. PCT/KR2019/005323
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2019/212284, PCT Pub. Date Nov. 7, 2019.
Claims priority of application No. 10-2018-0051022 (KR), filed on May 3, 2018.
Prior Publication US 2021/0086474 A1, Mar. 25, 2021
Int. Cl. B32B 5/02 (2006.01); B32B 5/24 (2006.01); B32B 5/26 (2006.01); B32B 9/04 (2006.01); B32B 33/00 (2006.01); C01B 32/205 (2017.01); C04B 35/52 (2006.01); C04B 35/524 (2006.01); B32B 38/00 (2006.01); B32B 3/26 (2006.01); H05K 9/00 (2006.01); B32B 7/02 (2019.01); B32B 9/00 (2006.01); C01B 32/20 (2017.01); B32B 27/12 (2006.01); H05K 7/20 (2006.01); B32B 7/022 (2019.01); B32B 7/023 (2019.01); B32B 7/025 (2019.01)
CPC B32B 5/26 (2013.01) [B32B 3/263 (2013.01); B32B 5/02 (2013.01); B32B 5/024 (2013.01); B32B 7/02 (2013.01); B32B 9/007 (2013.01); B32B 9/04 (2013.01); B32B 9/047 (2013.01); B32B 38/004 (2013.01); C01B 32/20 (2017.08); C01B 32/205 (2017.08); C04B 35/522 (2013.01); C04B 35/524 (2013.01); H05K 9/0081 (2013.01); H05K 9/0088 (2013.01); B32B 5/022 (2013.01); B32B 7/022 (2019.01); B32B 7/023 (2019.01); B32B 7/025 (2019.01); B32B 38/00 (2013.01); B32B 2038/0076 (2013.01); B32B 2250/05 (2013.01); B32B 2250/20 (2013.01); B32B 2255/02 (2013.01); B32B 2255/26 (2013.01); B32B 2262/062 (2013.01); B32B 2262/106 (2013.01); B32B 2305/18 (2013.01); B32B 2305/188 (2013.01); B32B 2305/20 (2013.01); B32B 2307/212 (2013.01); B32B 2307/302 (2013.01); B32B 2307/72 (2013.01); B32B 2307/732 (2013.01); B32B 2309/105 (2013.01); B32B 2313/04 (2013.01); B32B 2509/00 (2013.01); B32B 2605/00 (2013.01); H05K 7/2039 (2013.01); H05K 7/20481 (2013.01); Y10T 428/2495 (2015.01); Y10T 428/24355 (2015.01); Y10T 428/24942 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/24975 (2015.01); Y10T 428/24992 (2015.01); Y10T 442/3854 (2015.04)] 20 Claims
OG exemplary drawing
 
1. A multilayer graphite sheet, which comprises a laminate in which a plurality of first graphite layers and a plurality of second graphite layers are alternately laminated in a total of five layers or more, wherein the first graphite layer is denser than the second graphite layer by 1.1 times or more, wherein the multilayer graphite sheet has an apparent density in the range of greater than 1.1 g/cm3 to 1.8 g/cm3,
wherein a total thickness of the multilayer graphite sheet is 70 μm to 1,000 μm, the first graphite layer having a thickness of 10 μm to 50 μm and the second graphite layer having a thickness of 5 μm to 60 μm, wherein the total thickness is obtained by subjecting the multilayer graphite sheet to a rolling process.