Patent ID: 7952112

Claim:
A light emitting diode (LED) structure comprising: a first LED die comprising first p-type and first n-type layers, the first LED die having at least a first bottom metal layer; a second LED die comprising second p-type and second n-type layers, the second LED die having at least a second bottom metal layer; and a submount comprising an electrically insulating body, the insulating body comprising: a bottom layer and at least one top surface layer overlying and supported by the bottom layer, the at least one top surface layer having an outer boundary limited to an outer boundary of the bottom layer, the at least one top surface layer having at least one top surface, the at least one top surface having formed thereon a first metal pad bonded to the first bottom metal layer of the first LED die, the at least one top surface also having formed thereon a second metal pad bonded to the second bottom metal layer of the second LED die, the bottom layer having formed on its bottom surface a third metal pad electrically connected to the first metal pad and a fourth metal pad electrically connected to the second metal pad, the bottom layer underlying the first LED die and the second LED die, the at least one top surface layer having a first trench formed in it between the first metal pad and the second metal pad such that the first trench is above the bottom layer, the first trench in the at least one top surface layer for increasing thermal isolation between the first LED die and the second LED die, and a second trench in the bottom layer not directly beneath the first trench, wherein the second trench is located directly between the third metal pad and the fourth metal pad and extends substantially a length of the third metal pad or fourth metal pad for increasing thermal isolation between the first LED die and the second LED die.