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Light emitting device with silicone resin layer formed by screen printing

  • US 7,745,818 B2
  • Filed: 04/07/2006
  • Issued: 06/29/2010
  • Est. Priority Date: 04/08/2005
  • Status: Active Grant
First Claim
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1. A light emitting device, comprising a light emitting element, and a resin layer that has been screen printed to coat said light emitting element, whereinsaid 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.

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