LED module having LED chips as light source

A light emitting module comprising:

• a ceramic base plate that includes:
• a main surface, and
• a bottom surface opposite to the main surface;
• a first main surface electrode formed on the main surface of the base plate;
• a second main surface electrode formed on the main surface of the base plate and spaced apart from the first main surface electrode;
• a first bottom surface electrode formed on the bottom surface of the base plate;
• a second bottom surface electrode formed on the bottom surface of the base plate and spaced apart from the first bottom surface electrode;
• a first through-electrode penetrating through the base plate to connect the first main surface electrode and the first bottom surface electrode;
• a second through-electrode penetrating through the base plate to connect the second main surface electrode and the second bottom surface electrode;
• a light emitting element mounted on the first main surface electrode and electrically connected to the second main surface electrode;
• a reflector surrounding the light emitting element in a first direction viewed from a direction perpendicular to the main surface of the base plate, and including a concave portion formed therein when viewed in the first direction;
• and
• a resin filling a region surrounded by the reflector in the first direction,
• wherein the second through-electrode includes a first portion extending, between the main surface and the bottom surface of the base plate, in a direction parallel to the main surface, and
• wherein at least a portion of the second main surface electrode is accommodated in the concave portion.