Electric component assembly
An electric component arrangement is described, comprising a semiconductor component ( 1 ) mounted on a varistor body ( 2 ). The varistor body is contact-connected to the semiconductor component for the protection thereof against electrostatic discharges and contains a composite material having as matrix a varistor ceramic and as filler a highly thermally conductive material being different from the varistor ceramic.
1. An electric component arrangement, comprising:
a housing defining a recess having a surface exposable to light;
a reflective coating on the surface of the recess;
a varistor body; and
at least one semiconductor component mounted on the varistor body, the varistor body and the at least one semiconductor component being carried by the housing within the recess;
wherein the varistor body is contact-connected to the semiconductor component for the protection thereof against electrostatic discharges, and wherein the varistor body contains a composite material having as matrix a varistor ceramic and as filler particles of a thermally conductive material different from the varistor ceramic and distributed in the varistor ceramic.
2. The component arrangement according to claim 1 , wherein the varistor body has a plurality of electrical connections, of which at least one first electrical connection makes contact with the semiconductor component.
3. The component arrangement according to claim 2 , wherein the plurality of electrical connections of the varistor body comprise a second electrical connection, which is separate from the first electrical connection and which makes contact with the varistor body toward the outside.
4. The component arrangement according to claim 3 , wherein the second electrical connection is arranged on the underside of the varistor body.
5. The component arrangement according to claim 3 , wherein the semiconductor component is mounted on a top side of the varistor body, the first electrical connection and the second electrical connection are located on the top side of the varistor body, and wherein the varistor body further comprises a ground connection on its underside.
6. The component arrangement according to claim 1 , wherein the semiconductor component is flip-chip contact-connected to the varistor body.
7. The component arrangement according to claim 2 , wherein the varistor body has at least one internal electrode connected to an electrical connection.
8. The component arrangement according to claim 7 , wherein the internal electrode is connected to the electrical connection by means of at least one plated-through hole.
9. The component arrangement according to claim 7 , wherein a plurality of internal electrodes make contact with different electrical connections of the varistor body and have joint overlap areas.
10. The component arrangement according to claim 1 , wherein the varistor body has at least one thermally conductive channel through which heat can be dissipated from the semiconductor component.
11. The component arrangement according to claim 10 , wherein the thermally conductive channel contains a material chosen from a metal and a thermally conductive ceramic.
12. The component arrangement according to claim 1 , wherein the varistor body with the semiconductor component mounted on it are integrated in the housing, and wherein the housing has a thermally conductive region connected to the varistor body and which is thermally coupled to the varistor body.
13. The component arrangement according to claim 1 , wherein the varistor body and the semiconductor component are connected in parallel.
14. The component arrangement according to claim 1 , wherein the semiconductor component is chosen from: an LED, a capacitor, a thermistor, a diode, an amplifier, and a transformer.
15. The component arrangement according to claim 1 , additionally comprising a thermistor which contributes, depending on its resistance/temperature characteristic curve, to the regulation of the control current of the semiconductor component.
16. The component arrangement according to claim 1 , wherein the varistor ceramic forming the matrix is selected from zinc oxide, the mixture zinc oxide-bismuth (Bi)-antimony (Sb) or the mixture zinc oxide-praseodymium (Pr).
17. The component according to claim 1 , wherein the selected filler is aluminum nitride.
18. The component according to claim 1 , wherein the selected filler is hafnium oxide.
19. The component according to claim 1 , wherein the filler is selected from metals having a thermal conductivity of greater than 100 W/(m*K), noble metals of the 2 nd and 3 rd transition metal periods or the alloys thereof, silicon carbide, or manganese oxide.