COMPOSITION FOR COMPLEX SHEET WITH THERMAL DISSIPATION, EMI SHIELDING AND ABSORPTION, AND PRODUCTS MANUFACTURED THEREFROM

• Main Authors: CHUNG, YEON CHOON, KWON, JONG HWA, WHANG, TAE JO, CHOI, JAE ICK, OH, KYEONG KEUN, CHOI, HYUNG DO, LEE, CHANG HOON, SUNG, YONG HO, PARK, KYOUNG HEE
• Format: Patent
• Language: English
• Published: 27.07.2007
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

Provided are a composite sheet composition which is high in electromagnetic interference shielding property, a method for preparing the composite sheet composition, and a composite sheet of single layer prepared by using the composition. A composite sheet composition comprises 70-90 wt% of a filler which comprises 35-45 wt% of a heat radiating powder, 20-50 wt% of a soft magnetic powder, and 5-40 wt% of a conductive metal powder; and 10-30 wt% of a polymer matrix resin. Preferably the heat radiating powder is at least one selected from the group consisting of alumina, boron nitride and aluminum nitride and comprises three kinds of spherical powders of different particle size having 2-6 micrometers, 8-15 micrometers and 30-60 micrometers in a ratio of 1:1:1.