US 11,056,625 B2
Clear coating for light emitting device exterior having chemical resistance and related methods
Aaron James Francis, Apex, NC (US); and Michael J. Bergmann, Atlanta, GA (US)
Assigned to CreeLED, Inc., Newark, CA (US)
Filed by Cree, Inc., Durham, NC (US)
Filed on Feb. 19, 2018, as Appl. No. 15/899,196.
Prior Publication US 2019/0259925 A1, Aug. 22, 2019
Int. Cl. H01L 33/56 (2010.01); H01L 33/58 (2010.01); H01L 33/60 (2010.01); H01L 33/50 (2010.01); C09D 143/04 (2006.01); C09D 133/10 (2006.01); C09D 133/08 (2006.01); C09D 5/08 (2006.01)
CPC H01L 33/56 (2013.01) [C09D 5/08 (2013.01); C09D 133/08 (2013.01); C09D 133/10 (2013.01); C09D 143/04 (2013.01); H01L 33/502 (2013.01); H01L 33/58 (2013.01); H01L 33/60 (2013.01); H01L 2933/005 (2013.01)] 22 Claims
OG exemplary drawing
1. An LED device comprising:
one or more LED chips;
an encapsulant material or lens disposed over at least a portion of the one or more LED chips; and
a barrier coating at least partially disposed over the encapsulant or lens, wherein the barrier coating comprises a polyacrylate-silicon containing material, a polymethylacrylate-silicon containing material, or mixtures thereof represented by Formula (1):

OG Complex Work Unit Chemistry
where R is methyl or ethyl or a C3-C6 straight or branched alkyl; each R1 is, independently, hydrogen, hydroxyl, alkyl, phenyl, or vinyl, with the proviso that at least one R1 is hydrogen, hydroxyl, or vinyl; R2 and R3 are, independently, hydrogen, methyl, or ethyl; and x and y represent molar amounts of monomer, where 0<x+y≤1, and y>0 arranged as a block co-polymer, a random copolymer, a graft copolymer, or a silane end-terminated polymer.