GRAPHITE SHEET, HEAT DIFFUSION SHEET, AND METHOD OF PRODUCING GRAPHITE SHEET

To provide a graphite sheet of excellent uniformity of heat conductivity, a heat diffusion sheet comprising the same, and a method of producing a graphite sheet.SOLUTION: The graphite sheet according to the present invention is configured such that the absolute value of the difference between the ma...

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Bibliographic Details
Main Authors OSAWA SHO, NAKAZAWA YUKIHITO, ITO HIROTO, KIUCHI HIROYOSHI
Format Patent
LanguageEnglish
Japanese
Published 05.12.2019
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:To provide a graphite sheet of excellent uniformity of heat conductivity, a heat diffusion sheet comprising the same, and a method of producing a graphite sheet.SOLUTION: The graphite sheet according to the present invention is configured such that the absolute value of the difference between the maximum value and the minimum value of each of three half band widths obtained by measuring the half band width of a G band derived from a graphite crystal in a Raman spectrum at three positions, namely at the surface, at the internal center, and at the reverse face of the graphite sheet, is 5 cmor less.SELECTED DRAWING: None 【課題】本発明の課題は、熱伝導率の均一性が高いグラファイトシートを提供することである。また、それを具備した熱拡散シート及びグラファイトシートの製造方法を提供することである。【解決手段】本発明のグラファイトシートは、ラマン分光スペクトルのグラファイト結晶由来のＧバンドの半値幅をシート表面、内部中央部及びシート裏面の３箇所でそれぞれ測定したとき、得られる三つの半値幅の最大値と最小値の差異の絶対値が、５ｃｍ−１以下であることを特徴とする。【選択図】なし
Bibliography:Application Number: JP20160192620