ELECTROMAGNETIC WAVE SHIELDING RESIN COMPOSITION

• Main Authors: WAKE HIDETARO, KOISHI YOSHITAKA, EBIHARA KENJI
• Format: Patent
• Language: English
• Published: 08.12.2005
• Edition: 7
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PRINTED CIRCUITS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shielding resin composition exhibiting an excellent electromagnetic wave shielding performance but not causing a quality degradation in signals transmitting through wiring patterns in high-frequency regions beyond 1 GHz without the use of any external component. SOLUTION: Ferrite-coated metal magnetic microparticles such as those wherein a ferrite-coated layer resulting from ferrite plating of a surface of metal magnetic microparticles contains a carboxylated polymer are produced. An electromagnetic wave shielding resin composition is obtained by carrying out high-proportion charging and mixing of the ferrite-coated metal magnetic microparticles into a resin. COPYRIGHT: (C)2006,JPO&NCIPI