Abstract:
A light emitting device includes: a substrate; a first metal film formed on the substrate; quadrilateral light emitting elements arranged in a line at an interval d1, with second metal films on lower faces, and a die bond fixes the first and second metal films together. A diagonal of the respective quadrilateral outlines of the light emitting elements is aligned with the line. One of a distance DL from a light emitting element on one end among the light emitting elements arranged in the line to an end of the substrate, and a distance DR from a light emitting element on the other end among the light emitting elements arranged in the line to an end of the substrate is equal to or shorter than the interval d1.
Abstract:
A light emitting device includes a substrate; a first metal film formed on the substrate; a plurality of light emitting elements arranged in a line, each comprising a second metal film on a lower face thereof, each having a quadrilateral outline; and a die bond placed between the first metal film and the second metal films to fix the second metal film on the first metal film. The substrate includes low wettability areas having wettability to the die bond lower than the first metal film. Each of the low wettability areas is disposed between two of the light emitting elements, and each of four sides of the quadrilateral outline is adjacent to the low wettability area different from the low wettability areas adjacent to one of the other three sides.
Abstract:
Disclosed is a substrate for mounting light emitting element with a high positional accuracy and a method of fixing the substrate. A substrate for mounting light emitting element defines a first recess and a second recess in first side in a plan view. The first recess is defined by two corner portions and a straight portion which connects the two corner portions, and the second recess further includes at least two straight portions each narrowing toward the inner end portion.