Light-emitting device and process for its production

Details Light-emitting device and process for its production Light-emitting device and process for its production

2006-01-31

2006-01-31

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S461000

Reexamination Certificate

active

06992440

ABSTRACT:
To provide a light-emitting device having an airtight container sealed at a lower temperature by means of a sealing material not containing a harmful component such as lead, which is free from heat deterioration of a phosphor, particularly a blue-emitting phosphor.A light-emitting device having an airtight container sealed by means of a sealing composition comprising a curable methylphenyl silicone resin and a refractory filler, wherein the amount of the refractory filler based on the sum of the methylphenyl silicone resin and the refractory filler in the sealing composition, is from 10 to 80 mass %, and the methylphenyl silicone resin has a molar ratio of phenyl groups to methyl groups (i.e. mols of phenyl groups/mols of methyl groups) of from 0.1 to 1.2.

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