Patent ID: 8786065

Claim:
A substrate comprising: a first lead frame including a heat sink and a plurality of electrodes for external connection; a second lead frame laminated on the first lead frame and including a plurality of wirings for mounting light emitting elements; and a resin layer filled between the first lead frame and the second lead frame, wherein the plurality of wirings are arranged above the heat sink, the plurality of electrodes and part of the plurality of wirings are joined with each other, the plurality of wirings of the second lead frame includes: a plurality of first wirings including connecting portions with the light emitting elements; and a pair of second wirings including connecting portions with the electrodes and the light emitting elements, the plurality of first wirings are arranged adjacent to one another in parallel between the pair of second wirings, upper surfaces of the first wirings and upper surfaces of the second wirings serve as mounting portions for the light emitting elements, and lower surfaces of the second wirings serve as connecting portions with the electrodes.