Halogen-free, flame-retardant insulating epoxy resin...

Stock material or miscellaneous articles – Composite – Of epoxy ether

Reexamination Certificate

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C428S413000, C428S901000, C252S609000, C523S451000, C523S457000, C525S481000

Reexamination Certificate



A halogen-free, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin, (2) a curing agent for the epoxy resin, (3) a phosphate of a resorcinol type, (4) aluminum hydroxide, and (5) a cure accelerator for the epoxy resin. The composition displays necessary flame retardant properties and sufficient insulating properties after the formation of an insulating layer in a circuit board, withstands a plating process, and does not cause the bleedout of the insulation layer formed. A circuit board with flame retardant properties comprising insulation layers formed of the epoxy resin composition is also disclosed.

patent: 5354939 (1994-10-01), Hollstein et al.
patent: 5641840 (1997-06-01), Tsuchida et al.
patent: 5955184 (1999-09-01), Honda et al.
patent: 6180695 (2001-01-01), Ito et al.
patent: 6486235 (2002-11-01), Cooray et al.
patent: 10-182792 (1998-07-01), None
patent: 11-189639 (1999-07-01), None
patent: 11-189704 (1999-07-01), None
Machine translation of JP 10-182792, provided by the JPO web site.
Machine translation of JP 11-189639, provided by the JPO web site.
Machine translation of JP 11-189704, provided by the JPO web site.


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