Light emitting device with silicone resin layer formed by screen printing
AssigneeNichia Corporation
InventorsShinsuke Sofue, Hiroto Tamaki, Kunihiro Izuno
Life of this patent
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Abstract
A light emitting device, including a light emitting element, and a resin layer that has been screen printed to coat said light emitting element is provided. The resin layer is formed from a curable silicone resin composition, which includes (i) an organopolysiloxane with a polystyrene equivalent weight average molecular weight of at least 5×103, (ii) a condensation catalyst, (iii) a solvent, and (iv) a finely powdered inorganic filler. The uniformity of the film thickness is excellent, thus resulting in little color irregularities during light emission from the light emitting element.
Claims7
A light emitting device, comprising a light emitting element, and a resin layer that has been screen printed to coat said light emitting element, wherein
- said resin layer comprises a cured product in a dry state formed by curing a curable silicone resin composition, said curable silicone resin composition comprising:
- (i) an organopolysiloxane with a polystyrene equivalent weight average molecular weight of at least 5×103, represented by an average composition formula (1) shown below:
- R1a(OX)bSiO(4−a−b)/2 (1)
- wherein, each R1 represents, independently, an alkyl group, alkenyl group or aryl group of 1 to 6 carbon atoms, each X represents, independently, a hydrogen atom, or an alkyl group, alkenyl group, alkoxyalkyl group or acyl group of 1 to 6 carbon atoms, a represents a number within a range from 1.05 to 1.5, b represents a number that satisfies 0<b<2, and a value of a+b satisfies 1.05<a+b<2,
- (ii) a condensation catalyst selected from the group consisting of organometallic compounds containing a zinc, aluminium, titanium, tin, or cobalt atom,
- (iii) a solvent, and
- (iv) a finely powdered inorganic filler.
Dependencies are inferred from the claim text.