Integrated circuit and assembly therewith
View Patent ↗An integrated circuit suitable for use at high frequencies and comprising a first capacitor having an input and an output, as well as a ground connection, wherein the capacitor is ESD-protected through an resistor between the capacitor output and the ground connection, which resistor has a resistance value that is sufficiently high so as to prevent any substantial influence on RF performance of the ground connection.
1. An integrated comprising:
a capacitor having
an input node; and
an output node connected to an external ground node that is outside of the integrated circuit;
an internal ground node; and
an ESD-protection resistive component that is connected between the capacitor output node and the internal ground node and that has a resistance value that is sufficiently high to avoid substantial RF coupling, for frequencies up to at least 3.0 GHz, between the internal ground node and the external ground node.
2. The integrated circuit of claim 1 , further including a substrate of a semiconductor material.
3. The integrated circuit of claim 2 , wherein the integrated circuit is a circuit of integrated passive components, interconnects and bond pads, to which further devices can be assembled, and wherein the substrate of semiconductor material has a resistivity of at least 0.5 kΩcm.
4. The integrated circuit of claim 2 , wherein the capacitor is a trench capacitor defined as a trench in the substrate.
5. The integrated circuit of claim 1 , wherein the circuit is designed for frequencies in the range of 0.9-3.0 GHz.
6. The integrated circuit of claim 1 , wherein the ESD-protection resistive component has a resistance value that is at least ten times as large as a resistance value from the capacitor output node to the external ground node.
7. The integrated circuit of claim 1 , wherein the ESD-protection resistive component has a resistance value that is sufficiently high to avoid substantial RF coupling, for frequencies between 0.9 and 3.0 GHz.
8. The integrated circuit of claim 6 , wherein ESD-protection resistive component has a resistance value that is in the range of 60 to 200Ω.
9. The integrated circuit of claim 2 , wherein the ESD-protection resistive component is coupled to the internal ground node with a vertical interconnect extending through the substrate.
10. The integrated circuit of claim 2 , wherein the circuit is free of any ESD-protection on the basis of active components.
11. An integrated circuit arrangement comprising:
an integrated circuit located on the integrated circuit carrier including
a substrate;
an internal ground node located below the substrate;
a capacitor located above a bottom surface of the substrate and having an output node and an input node; and
a resistive element providing electrostatic discharge (ESD) protection for the capacitor by providing a first current path from the output node of the capacitor to the internal ground node; and
an impedance element providing a second current path from the output node of the capacitor to the external ground, wherein the ratio of resistances between the first current path and the second current path is sufficient to substantially decouple the external ground node from the internal ground node at circuit-operating frequencies of at least 0.9 GHz.
12. The integrated circuit arrangement of claim 11 , wherein the ratio of resistances is sufficient to substantially decouple the external ground node from the internal ground node at circuit-operating frequencies of at least 3.0 GHz.
13. The integrated circuit arrangement of claim 11 , wherein the substrate has a resistivity and thickness tuned for the use of high quality inductors thereon.
14. The integrated circuit arrangement of claim 11 , wherein the substrate has a thickness of between 100 and 300 micrometers and a resistance of at least 0.5 kΩcm.
15. The integrated circuit arrangement of claim 11 , wherein the resistive element is connected to the internal ground node through a vertical interconnection within the substrate.
16. The integrated circuit arrangement of claim 11 , wherein the resistive element and the first current path are configured and arranged to provide ESD protection for the capacitor in the absence of the impedance element and the second current path and to decouple the internal ground node.
17. The integrated circuit arrangement of claim 11 , further including
an integrated circuit carrier having
a carrier substrate;
at least one bond pad located on top of the substrate;
an inductor located within the carrier substrate and electrically connected to the at least one bond pad;
terminals located on the bottom surface of the carrier substrate; and
thermal vertical interconnections through the carrier substrate connected to one or more of the terminals;
an adhesive layer side bonded to the carrier substrate and to the substrate of the integrated circuit; and
a bond wire connecting the at least one bond pad to the integrated circuit, thereby providing the second current path.
18. The integrated circuit arrangement of claim 11 , wherein the coupling is configured for less than about −30 dB at 3.0 GHz.
19. The integrated circuit arrangement of claim 11 , wherein the coupling is configured for less than about −50 dB at 1 GHz.