POLYIMIDE SHEET

PROBLEM TO BE SOLVED: To provide a polyimide sheet in which a thermal expansion coefficient in a plane is small, anisotropy in the thickness direction is large, and break point distortion is extremely large. SOLUTION: The polyimide sheet is produced by laminating a plurality of polyimide films. When...

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Bibliographische Detailangaben
Hauptverfasser:	HIDAKA SHOTARO, OTA TSUNEO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a polyimide sheet in which a thermal expansion coefficient in a plane is small, anisotropy in the thickness direction is large, and break point distortion is extremely large. SOLUTION: The polyimide sheet is produced by laminating a plurality of polyimide films. When the plane direction of the polyimide sheet is an X-axis and a Y-axis, and the thickness direction of the sheet is a Z-axis, between a thermal expansion coefficient α in the X-axis direction and a thermal expansion coefficient β in the Y-axis direction, the relationship of β≥1.5α is established, and between α and a thermal expansion coefficient γ in the Z-axis direction, the relationship of γ≥10.0α is established. COPYRIGHT: (C)2011,JPO&INPIT