Patent ID: 9490236
Filing Date: 2016-11-08
CPC Classification: F21K,F21V,F21Y,H01L,H05K

Claim Text:
1. A light-emitting device comprising: a ceramic substrate having a rectangular outer shape in a top view; a plurality of LED chips positioned around a center of a primary surface of said ceramic substrate; a resin dam formed on the primary surface of said ceramic substrate and provided so as to surround a mounting area in which said plurality of LED chips are provided; a first electrode land and a second electrode land which are electrodes to be connected to a power supply and are electrically connected to said plurality of LED chips, said first and second electrode lands being provided outside said resin dam and near corners of the primary surface of the substrate diagonally opposite to each other, each of said first and second electrode lands having a shape defined by first and second sides along the sides of said ceramic substrate defining the corresponding corner, third and fourth sides shorter than and opposing to the first and second sides, respectively, and a fifth side between the third and fourth sides; a first wire pattern provided on said ceramic substrate including a first leading line, said first leading pattern being located between said first electrode land and said resin dam; a second wire pattern provided on said ceramic substrate including a second leading line, said second leading pattern being located between said second electrode land and said resin dam; and a resin layer provided attaching to an inner side of said resin dam and covering said plurality of LED chips, wherein said plurality of LED chips are electrically connected to said first and second electrode lands via said first and second leading patterns, respectively, at least one of said first and second sides of said first electrode land is longer in length than a width of said first leading pattern, and at least one of said first and second sides of said second electrode land is longer in length than a width of said second leading pattern.