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US 2019/0169329 A1Published application
Norbornene cross-linked polymer and method for producing same
AssigneeRimtec Corporation
InventorNobuto Kamei
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AssigneeRimtec Corporation
InventorNobuto Kamei
Estimating the term…
The present invention relates to a norbornene-based crosslinked polymer containing at least one member selected from the group consisting of dicyclopentadiene-based monomer units, tetracyclododecene-based monomer units, and tricyclopentadiene-based monomer units in an amount of 50% by mass or more, wherein the norbornene-based crosslinked polymer has a glass transition temperature of 240° C. or higher. Further, the present invention relates to a method for producing a norbomene-based crosslinked polymer as defined above, including step (1): heating a blend containing at least one member of the above monomer components, and a metathesis polymerization catalyst to a temperature lower than a deactivation temperature of the metathesis polymerization catalyst to carry out a primary curing; and step (2): heating a cured product obtained in the step (1) to a temperature equal to or higher than the deactivation temperature of the above metathesis polymerization catalyst to carry out a secondary curing.
A power semiconductor wherein semiconductor elements are encapsulated with a norbornene-based crosslinked polymer comprising tricyclopentadiene-based monomers in an amount of 50% or more of the entire monomers;
A method for producing a power semiconductor comprising encapsulating semiconductor elements with a norbornene-based crosslinked polymer comprising tricyclopentadiene-based monomers in an amount of 50% or more of the entire monomers,
Dependencies are inferred from the claim text.