Sealing agent for optical semiconductor element, and optical...

Details Sealing agent for optical semiconductor element, and optical... Sealing agent for optical semiconductor element, and optical...

2008-06-13

2011-12-27

Loewe, Robert (Department: 1766)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C525S478000, C313S502000

Reexamination Certificate

active

08084530

ABSTRACT:
The sealing agent for an optical semiconductor device, which comprises: a silicone resin having a cyclic ether-containing group in the molecular structure; a heat curing agent capable of reacting with the cyclic ether-containing group; and a fine particulate material of silicon oxide, and the sealing agent having a viscosity of 500 to 10,000 mPa·s measured by an E-type viscometer at 25° C. at 5 rpm, a thixotropic value of 1.2 to 2.5 calculated by dividing a viscosity measured by the E-type viscometer at 25° C. at 1 rpm by a viscosity measured at 10 rpm (viscosity at 1 rpm/viscosity at 10 rpm), and a minimum viscosity of 100 mPa·s or higher measured at 1 s−1in the temperature range of 25° C. to a curing temperature by a parallel plate rheometer.

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International Search Report issued Aug. 19, 2008 in International (PCT) Application No. PCT/JP2008/060839.

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