Integrated circuit, and a mobile phone having the integrated circuit
In an example embodiment, an integrated circuit comprises an on-chip electronic component. The on-chip electronic component has an active surface in a hermetically sealed cavity and a cover to hermetically seal the cavity. There is an additional electronic component wherein the additional electronic component is fixed on the cover.
1. An integrated circuit comprising:
an on-chip electronic component having a top surface having an active portion and a connection pad located next to the active portion, the active surface portion in a hermetically sealed cavity and a cover to hermetically seal the cavity,
the cover configured and arranged to cover the active portion while leaving the connection pad uncovered,
an additional electronic component fixed on the cover, and wires directly connecting the additional electronic component to the connection pad; and wherein the additional electronic component is secured on a surface of the cover, the cover comprising a substrate for securing the additional electronic component.
2. The integrated circuit according to claim 1 , wherein the surface of the cover comprises an outside surface and an inside surface, the inside surface is facing the cavity and the outside surface is opposite the inside surface, the additional electronic component is secured on the outside surface of the cover.
3. The integrated circuit according to claim 1 , wherein the integrated circuit further comprises an on-chip transceiver adapted to receive or transmit a radio signal.
4. The integrated circuit according to claim 1 , wherein the additional electronic component is a coil having a flat coil-shaped conductive line having an impedance value.
5. An assembly adapted to be used in an integrated circuit according to claim 1 , comprising the additional electronic component and the cover to hermetically seal the cavity, wherein the additional electronic component is fixed on the cover.
6. A mobile phone comprising an integrated circuit according to claim 3 .
7. An integrated circuit comprising:
a semiconductor substrate;
a filter circuit including
a piezo-electric element having a top surface and a bottom surface, the bottom surface in contact with the semiconductor substrate,
electrically conductive filter elements on the top surface of the piezo-electric element, and
a filter connection pad electrically connected to the conductive filter elements;
a cover that forms a hermetically sealed cavity between the conductive filter elements and the cover, the cover leaving at least a portion of the connection pad uncovered;
an inert gas that fills the cavity;
an antenna coil on the cover;
an antenna connection pad electrically connected to the antenna coil and located on the cover; and
a bond wire having a first end in contact with the antenna connection pad and a second end in contact with the filter connection pad.
8. The integrated circuit of claim 7 , further including a wireless transceiver circuit on the semiconductor substrate, a transceiver connection pad and a bond wire with a first end contacting the filter connection pad and a second end contacting the transceiver connection pad.
9. The integrated circuit of claim 7 , wherein, between the cover and the electrically conductive filter elements, the sealed cavity is 20 to 30 micrometers in width.
10. The integrated circuit of claim 7 , wherein the cover is made from silicon.