Vertical solid-state transducers and high voltage solid-state transducers having buried contacts and associated systems and methods
Solid-state transducers (“SSTs”) and vertical high voltage SSTs having buried contacts are disclosed herein. An SST die in accordance with a particular embodiment can include a transducer structure having a first semiconductor material at a first side of the transducer structure, and a second semiconductor material at a second side of the transducer structure. The SST can further include a plurality of first contacts at the first side and electrically coupled to the first semiconductor material, and a plurality of second contacts extending from the first side to the second semiconductor material and electrically coupled to the second semiconductor material. An interconnect can be formed between at least one first contact and one second contact. The interconnects can be covered with a plurality of package materials.
1. A solid state transducer (SST) wafer, comprising:
a transducer structure having a first semiconductor material at a first side, a second semiconductor material at a second side opposite the first side, and a light-emitting active region between the first semiconductor material and the second semiconductor material; and
a plurality of features that separate the transducer structure into a plurality of individually addressable light-emitting diode (LED) dies, wherein each LED die includes—
a first electrical terminal coupled to the first semiconductor material at the first side;
a second electrical terminal coupled to the second semiconductor material at the first side;
a plurality of junctions coupled in series between the first electrical terminal and the second electrical terminal;
a plurality of internal first contacts;
a plurality of internal second contacts;
a plurality of interconnections between one or more internal first and second contacts; and
a thermal pad disposed on the first side.
2. The SST wafer of claim 1 , further comprising a third contact coupled to the interconnection, the third contact configured to cross-connect to another contact on a second die.
3. The SST wafer of claim 1 , further comprising a conductive material over the internal first contacts, the internal second contacts and the interconnections.
4. The SST wafer of claim 3 , further comprising a barrier material between the conductive material and the internal first contacts, the internal second contacts and the interconnections.
5. A solid state transducer (SST) die, comprising:
a first terminal on a first side of the SST die;
a second terminal on the first side of the SST die;
a plurality of SST junctions coupled in series between the first and second terminals;
a plurality of buried first contacts, wherein each individual SST junction includes at least one buried first contact;
a plurality of buried second contacts, wherein each individual SST junction includes at least one buried second contact;
a plurality of buried interconnects between each individual junction, wherein each buried interconnect couples at least one buried second contact to at least one buried first contact on an adjacent junction; and
a thermal pad on the first side of the SST die.
6. The SST die of claim 5 wherein the buried first and second contacts and the buried interconnects are buried under a barrier material and a conductive metal.
7. The SST die of claim 6 wherein the conductive metal is copper.
8. The SST die of claim 5 wherein the first terminal and the second terminal are electrically isolated by a plurality of dielectric paths.