Electronic device, method for producing the same, and communication apparatus including the same

Abstract

An electronic device according to the present invention includes a functional element acting as a predetermined circuit packaged using a resin member. The electronic device comprises a wiring substrate having a wiring member for electric connection with an external circuit; the functional element mounted on one main surface of the wiring substrate so as to be electrically connected to the wiring member; and the resin member provided on the one main surface of the wiring substrate having the functional element, so as to package the functional element. The resin member includes a filler formed of a magnetic material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view showing an exemplary structure of an electronic device 11, according to an embodiment of the present invention, including a surface acoustic wave element as a functional element packaged using a resin member;

FIG. 2A shows an exemplary configuration of a ladder-type circuit of a band-pass filter;

FIG. 2B shows an exemplary configuration of a lattice-type circuit of a band-pass filter;

FIG. 3 is a cross-sectional view showing an exemplary structure of an electronic device 12, according to an embodiment of the present invention, including a duplexer;

FIG. 4 is a functional block diagram of the electronic device 12 shown in FIG. 3;

FIG. 5 is a functional block diagram of a communication apparatus 41 including the electronic device 12 shown in FIG. 3;

FIG. 6 is a functional block diagram of a communication apparatus 41 including the electronic device 12 shown in FIG. 3 and band-pass filters 417 and 418 included in the electronic device 11 shown in FIG. 1;

FIG. 7 shows an exemplary structure of a measuring system for measuring intermodulation distortion characteristics;

FIG. 8 is a cross-sectional view showing an exemplary structure of an electronic device 13, according to an embodiment of the present invention, including a mechanical switch;

FIG. 9 is a functional block diagram of a communication apparatus 43 including the electronic device 13 shown in FIG. 8;

FIG. 10 is a cross-sectional view showing an exemplary structure of an electronic device 11a, according to an embodiment of the present invention, including a filter using a film bulk acoustic wave element;

FIG. 11 is a cross-sectional view showing an exemplary structure of an electronic device 12a, according to an embodiment of the present invention, including a duplexer using a film bulk acoustic wave element;

FIG. 12 is a cross-sectional view showing an exemplary structure of an electronic device 51, according to an embodiment of the present invention, including a film bulk acoustic wave element as a functional element packaged using a substrate;

FIG. 13 is a cross-sectional view showing an exemplary structure of an electronic device 52, according to an embodiment of the present invention, including a duplexer;

FIG. 14 is a cross-sectional view showing an exemplary structure of an electronic device 53, according to an embodiment of the present invention, including a mechanical switch;

FIG. 15 is a cross-sectional view showing an exemplary structure of an electronic device 51, according to an embodiment of the present invention, in which a magnetic layer 5031 is provided on a side wall of a via-hole 561vh;

FIG. 16 is a cross-sectional view showing an exemplary structure of an electronic device 52, according to an embodiment of the present invention, in which a wiring electrode 103 is entirely formed of a magnetic material;

FIG. 17 is a cross-sectional view showing an exemplary structure of an electronic device 51, according to an embodiment of the present invention, in which a via-hole is provided on a lid substrate 530;

FIG. 18 is a cross-sectional view showing an exemplary structure of an electronic device 51a, according to an embodiment of the present invention, including a filter using a surface acoustic wave element;

FIG. 19 is a cross-sectional view showing an exemplary structure of an electronic device 52a, according to an embodiment of the present invention, including a duplexer using a surface acoustic wave element;

FIG. 20 is a cross-sectional view showing a structure of an exemplary conventional electronic device 61;

FIG. 21 is a cross-sectional view showing a structure of another exemplary conventional electronic device 71;

FIG. 22 is a cross-sectional view showing a structure of a still another exemplary conventional electronic device 81; and

FIG. 23 is a cross-sectional view showing a structure of still another exemplary conventional electronic device 91.

Claims

1. An electronic device including a functional element acting as a predetermined circuit packaged using a resin member, the electronic device comprising: a wiring substrate having a wiring member for electric connection with an external circuit;the functional element mounted on one main surface of the wiring substrate so as to be electrically connected to the wiring member; andthe resin member provided on the one main surface of the wiring substrate having the functional element, so as to package the functional element;wherein the resin member includes a filler formed of a magnetic material.

2. An electronic device according to claim 1, wherein the filler is formed of a conductive magnetic material covered with an insulating material.

3. An electronic device according to claim 1, wherein the filler is formed of an organic material carrying the magnetic material.

4. An electronic device according to claim 1, wherein the magnetic material has a chemical formula including at least one chemical element selected from nickel, iron, chromium, cobalt and manganese.

5. An electronic device according to claim 1, wherein the functional element is a passive element.

6. An electronic device according to claim 1, wherein the functional element acts as a filter using elastic vibration.

7. An electronic device according to claim 1, wherein the functional element acts as a mechanical switch.

8. An electronic device according to claim 1, wherein: two of the functional element are provided on one main surface of the wiring substrate; andthe two functional elements respectively act as band-pass filters having different passbands from each other.

9. A communication apparatus, comprising: an antenna;a transmission circuit;a receiving circuit; andan electronic device according to claim 1 in at least one of a connection section of the antenna with the transmission circuit and the receiving circuit, a connection section of the antenna and the transmission circuit, and a connection section of the antenna and the receiving circuit.

10. A method for producing an electronic device including a functional element acting as a predetermined circuit packaged using a resin member, the method comprising the steps of: mounting the functional element on one main surface of a wiring substrate having a wiring member for electric connection with an external circuit, such that the functional element is electrically connected to the wiring member; andforming the resin member including a filler formed of a magnetic material on the one main surface of the wiring substrate having the functional element, such that the functional element is packaged.

11. An electronic device including a part of a functional element acting as a predetermined circuit packaged using a recessed substrate having a recess in one main surface thereof, the electronic device comprising: the functional element including at least a base substrate and a base electrode provided on one main surface of the base substrate, the base electrode having a pattern in accordance with the predetermined circuit;the recessed substrate provided on the main surface of the base substrate so as to locate the base electrode in the recess and package the base electrode; anda wiring electrode, provided in a via-hole formed in one of the base substrate and the recessed substrate, for electrically connecting the functional element and an external circuit to each other;wherein at least a part of the wiring electrode is formed of a magnetic material.

12. An electronic device according to claim 11, further comprising a magnetic layer provided on at least one of, on a main surface of the base substrate opposite to the main surface thereof having the base electrode, and on a main surface of the recessed substrate opposite to the main surface thereof having the recess.

13. An electronic device according to claim 11, wherein at least a part of an outer part of the wiring electrode in contact with the via-hole is formed of a magnetic material.

14. An electronic device according to claim 11, wherein the wiring electrode is entirely formed of a conductive magnetic material.

15. An electronic device according to claim 11, wherein the wiring electrode includes: an input electrode for inputting an electric signal which is output from the external circuit;an output electrode for outputting an electric signal to the external circuit; anda grounding electrode;wherein at least a part of at least one of the input electrode and the output electrode is formed of a magnetic material.

16. An electronic device according to claim 11, wherein the magnetic material has a chemical formula including at least one chemical element selected from nickel, iron, chromium, cobalt and manganese.

17. An electronic device according to claim 11, wherein a part of the wiring electrode is formed of a magnetic material covered with an insulating material.

18. An electronic device according to claim 11, wherein a part of the wiring electrode is formed of an organic material carrying the magnetic material.

19. An electronic device according to claim 11, wherein the functional element is a passive element.

20. An electronic device according to claim 11, wherein: the base electrode includes a pattern in accordance with a filter; andthe functional element acts as a filter using elastic vibration.

21. An electronic device according to claim 11, wherein: the base electrode includes a pattern in accordance with a mechanical switch; andthe functional element acts as a mechanical switch.

22. An electronic device according to claim 11, wherein: the base electrode includes a plurality of patterns in accordance with band-pass filters having different passbands from each other; andthe functional element acts as a duplexer including the band-pass filters.

23. A communication apparatus, comprising: an antenna;a transmission circuit;a receiving circuit; andan electronic device according to claim 11 in at least one of a connection section of the antenna with the transmission circuit and the receiving circuit, a connection section of the antenna and the transmission circuit, and a connection section of the antenna and the receiving circuit.

24. A method for producing an electronic device including a part of a functional element acting as a predetermined circuit packaged using a recessed substrate having a recess in one main surface thereof, the method comprising the steps of: forming a base electrode, including a pattern in accordance with the predetermined circuit of the functional element, on one main surface of the base substrate;locating the recessed substrate on the main surface of the base substrate so as to locate the base electrode in the recess and package the base electrode;forming a via-hole in one of the base substrate and the recessed substrate; andforming a wiring electrode for electrically connecting the functional element and an external circuit to each other in the via-hole, the wiring electrode being at least partially formed of a magnetic material.