WO2013128541A1 - 弾性波デバイス - Google Patents
弾性波デバイス Download PDFInfo
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- WO2013128541A1 WO2013128541A1 PCT/JP2012/054750 JP2012054750W WO2013128541A1 WO 2013128541 A1 WO2013128541 A1 WO 2013128541A1 JP 2012054750 W JP2012054750 W JP 2012054750W WO 2013128541 A1 WO2013128541 A1 WO 2013128541A1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0542—Constructional combinations of supports or holders with electromechanical or other electronic elements consisting of a lateral arrangement
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0547—Constructional combinations of supports or holders with electromechanical or other electronic elements consisting of a vertical arrangement
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0547—Constructional combinations of supports or holders with electromechanical or other electronic elements consisting of a vertical arrangement
- H03H9/0561—Constructional combinations of supports or holders with electromechanical or other electronic elements consisting of a vertical arrangement consisting of a multilayered structure
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0566—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0566—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers
- H03H9/0571—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers including bulk acoustic wave [BAW] devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0566—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers
- H03H9/0576—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers including surface acoustic wave [SAW] devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1071—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the SAW device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1085—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a non-uniform sealing mass covering the non-active sides of the BAW device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/72—Networks using surface acoustic waves
- H03H9/725—Duplexers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H2009/0019—Surface acoustic wave multichip
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/058—Holders; Supports for surface acoustic wave devices
- H03H9/059—Holders; Supports for surface acoustic wave devices consisting of mounting pads or bumps
Definitions
- the present invention relates to an acoustic wave device.
- SAW surface acoustic wave
- piezoelectric thin film resonators are used as filters having excellent high-frequency characteristics.
- devices including a plurality of filters such as duplexers and dual filters are used. In order to reduce the size of the device, it is required to arrange a plurality of filters close to each other.
- Patent Document 1 describes a substrate in which a plurality of SAW filters are embedded.
- an object of the present invention is to provide an acoustic wave device capable of obtaining high isolation.
- the present invention provides a first chip including a first substrate and a first filter formed on the first surface of the first substrate, a second substrate, and a position different from the first surface of the second substrate. And a second chip including a second filter formed on the second surface.
- the second surface may be in a direction opposite to the first surface.
- the first surface and the second surface face the same direction, and the first mounting surface on which the first chip is mounted is different from the second mounting surface on which the second chip is mounted.
- the second chip may be provided on the first chip.
- the pass band of the first filter may be different from the pass band of the second filter.
- the first chip includes a first terminal formed on the first surface, connected to the first filter, and configured to input or output a signal with the outside of the first chip, and the second chip.
- a third substrate may be provided, and the first chip and the second chip may be embedded in the third substrate.
- the third substrate includes a plurality of stacked insulating layers, and the first chip and the second chip are embedded in the same insulating layer included in the third substrate. Can do.
- the third substrate includes a plurality of stacked insulating layers, The first chip and the second chip may be embedded in different insulating layers of the third substrate.
- a component provided on the third substrate and a wiring provided on the third substrate and connecting the first chip and the second chip to the component are provided. it can.
- the first chip is a chip connected between a common terminal and a transmission terminal
- the second chip is a chip connected between the common terminal and a reception terminal. Can do.
- the first chip and the second chip may not be connected.
- the first substrate and the second substrate may be piezoelectric substrates, and the first filter and the second filter may include IDT.
- the first filter and the second filter may include a piezoelectric thin film resonator.
- an elastic wave device capable of obtaining high isolation can be provided.
- FIG. 1A is a block diagram illustrating a duplexer.
- FIG. 1B is a block diagram illustrating a dual filter.
- FIG. 2 is a cross-sectional view illustrating a duplexer according to a comparative example.
- FIG. 3 is a cross-sectional view illustrating the duplexer according to the first embodiment.
- FIG. 4A is a plan view illustrating a ladder filter.
- FIG. 4B is a plan view illustrating a multimode filter.
- FIG. 5A is a block diagram illustrating a module according to the second embodiment.
- FIG. 5B is a plan view illustrating the module.
- FIG. 5C is a cross-sectional view taken along line AA in FIG.
- FIG. 6A is a block diagram illustrating a module according to the third embodiment.
- FIG. 6B is a plan view illustrating the module.
- FIG. 6C is a cross-sectional view taken along line AA in FIG.
- FIG. 7 is a cross-sectional view illustrating a module according to the fourth embodiment.
- FIG. 8 is a cross-sectional view illustrating the FBAR.
- FIG. 1A is a block diagram illustrating a duplexer.
- the transmission filter F1 is electrically connected between the antenna terminal Ant (common terminal) and the transmission terminal Tx, and the reception filter F2 is connected between the antenna terminal Ant and the reception terminal Rx. Electrically connected.
- the pass band of the transmission filter F1 is different from the pass band of the reception filter F2, for example.
- the transmission filter F1 passes signals within the pass band of the transmission filter F1 among the transmission signals input from the transmission terminal Tx, and suppresses signals with frequencies outside the pass band.
- the transmission signal filtered by the transmission filter F1 is transmitted to the outside from an antenna (not shown) connected to the antenna terminal Ant.
- the reception filter F2 passes a signal having a frequency within the pass band and suppresses a signal having a frequency outside the pass band among the reception signals received by the antenna.
- the reception signal filtered by the reception filter F2 is input to an electronic component such as an IC (Integrated Circuit) through a reception terminal Rx.
- the transmission signal and the reception signal are high-frequency signals whose frequencies are located, for example, in the GHz band.
- FIG. 1B is a block diagram illustrating a dual filter.
- the filter F3 is electrically connected between the input terminal In1 and the output terminal Out1.
- the filter F4 is electrically connected between the input terminal In2 and the output terminal Out2, and is not electrically connected to the filter F3.
- the pass band of the filter F3 does not overlap with the pass band of the filter F4, for example. Therefore, the signal output from the output terminal Out1 and the signal output from the output terminal Out2 have different frequencies.
- the filters F3 and F4 as transmission filters
- the dual filter can transmit two transmission signals corresponding to different communication methods.
- the filters F3 and F4 as reception filters
- the dual filter can receive two reception signals corresponding to different communication methods.
- FIG. 2 is a cross-sectional view illustrating an acoustic wave device 100R according to a comparative example.
- the acoustic wave device 100R includes chips 110 and 120.
- a filter 114 and terminals 113 a and 113 b electrically connected to the filter 114 are formed on the surface 112 a of the piezoelectric substrate 112 of the chip 110.
- a filter 124 and terminals 123 a and 123 b electrically connected to the filter 124 are formed on the surface 122 a of the piezoelectric substrate 122 of the chip 120.
- the filters 114 and 124 are SAW filters including an IDT (Interdigtal Transducer) and a reflector.
- the terminals 113a, 113b, 123a, and 123b include bumps that are formed of solder mainly composed of tin silver (Sn—Ag), for example, and protrude from the surfaces 112a and 122a.
- the chip 110 and the chip 120 are flip-chip mounted on the substrate 130 so that the filters 114 and 124 face the substrate 130, and are sealed by a sealing portion 131 formed of a resin such as an epoxy resin, for example. .
- the substrate 130 is a laminated substrate in which insulating layers 132 and 134 and conductor layers 146, 148 and 150 are laminated.
- the conductor layers are connected by via wirings 151 that penetrate the insulating layers 132 and 134.
- the filters 114 and 124 are connected to the conductor layer 146 through terminals.
- the conductor layer 146 is connected to the conductor layer 150 through the conductor layer 148 and the via wiring 151.
- the conductor layer 150 functions as a foot pad for inputting or outputting signals.
- the filter 114 When the acoustic wave device 100R is a duplexer, the filter 114 functions as the transmission filter F1 in FIG. 1A, and the filter 124 functions as the reception filter F2.
- the conductor layer 150 includes a transmission terminal Tx, a reception terminal Rx, an antenna terminal Ant, and a ground terminal (not shown) in FIG.
- the acoustic wave device 100R can be a dual filter. In this case, the filter 114 functions as the filter F3 in FIG. 1B, and the filter 124 functions as the filter F4.
- the conductor layer 150 includes input terminals In1 and In2 and output terminals Out1 and Out2.
- Example 1 is an example in which the surfaces on which the filters of the two chips are formed are opposite to each other.
- FIG. 3 is a cross-sectional view illustrating an acoustic wave device 100 according to the first embodiment.
- the substrate 30 includes a plurality of insulating layers 32, 34, 36, 38, 40, 42 and 44 and a plurality of conductor layers 46, 48, 50, 52, 54, 56. And 58 are laminated substrates.
- the insulating layer is made of, for example, a resin such as an epoxy resin or a glass epoxy resin, or an insulator such as ceramics.
- the conductor layer is formed of, for example, a metal such as copper (Cu) or aluminum (Al), or an alloy containing these metals.
- the chips 10 and 20 are embedded in the insulating layers 36, 38 and 40, and are disposed in the gaps 31 formed in the insulating layers 36, 38 and 40.
- the gap 31 is filled with a gas such as argon (Ar).
- the chip 10 includes a piezoelectric substrate 12 (first substrate), terminals 13a and 13b (first terminal) formed on the surface 12a (first surface) of the piezoelectric substrate 12, and a filter 14 (first filter). )including.
- the filter 14 includes a SAW filter, for example, and is electrically connected to the terminals 13a and 13b.
- the terminals 13a and 13b are connected to the conductor layer 58 functioning as a foot pad via the conductor layers 54 and 56 and the via wiring 51.
- the chip 20 (second chip) includes a piezoelectric substrate 22 (second substrate), terminals 23a and 23b (second terminals) formed on the surface 22a (second surface) of the piezoelectric substrate 22, and a filter 24 (second filter). )including.
- the filter 24 includes a SAW filter, for example, and is electrically connected to the terminals 23a and 23b.
- the terminal 23 a is connected to the conductor layer 58 via the conductor layers 46, 48, 50, 52, 54 and 56 and the via wiring 51.
- the terminal 23 b is connected to the conductor layer 58 through the conductor layers 48, 50, 52, 54 and 56 and the via wiring 51.
- the pass band of the filter 14 does not overlap the pass band of the filter 24. Since the filters 14 and 24 are exposed in the air gap 31, the excitation of the elastic wave is not hindered.
- the surface 12 a faces the insulating layer 42.
- the surface 22a faces in the opposite direction to the surface 12a and faces the insulating layer 34.
- the filter 14 functions as, for example, the transmission filter F1 in FIG.
- the filter 24 functions as a reception filter F2, for example.
- the conductor layer 58 includes a transmission terminal Tx, a reception terminal Rx, an antenna terminal Ant (common terminal), and a ground terminal in FIG.
- the terminals 13a and 13b are connected to either the transmission terminal Tx or the antenna terminal Ant.
- the terminals 23a and 23b are connected to either the reception terminal Rx or the antenna terminal Ant. In this case, high isolation is obtained between the transmission filter F1 and the reception filter F2.
- terminals 13a and 13b for inputting or outputting signals with the outside of the chip 10 are provided on the surface 12a
- terminals 23a and 23b for inputting or outputting signals with the outside of the chip 20 are provided on the surface 22a. Since the distance between the terminals 13a and 13b and the terminals 23a and 23b is increased, the isolation between the transmission terminal Tx and the reception terminal Rx in FIG. 1A is increased.
- a ladder type filter described later is used as the transmission filter F1
- a vertical connection type multimode filter hereinafter referred to as a multimode filter
- the filter 14 may be used as the reception filter F2
- the filter 24 may be used as the transmission filter F1.
- the acoustic wave device 100 can be a dual filter.
- the filter 14 functions as the filter F3 in FIG. 1B, for example, and the filter 24 functions as the filter F4, for example.
- the conductor layer 58 includes input terminals In1 and In2 and output terminals Out1 and Out2.
- the terminals 13a and 13b are connected to either the input terminal In1 or the output terminal Out1, and the terminals 23a and 23b are connected to either the input terminal In2 or the output terminal Out2.
- high isolation is obtained between the filter F3 and the filter F4.
- the pass band of the filter 14 may not overlap with the pass band of the filter 24, or may partially overlap.
- the pass band of the filter 14 may be different from or the same as the pass band of the filter 24.
- the substrate 30 may be thick. As shown in FIG. 3, the substrate 30 can be thinned by embedding the chips 10 and 20 in the same insulating layers 36, 38 and 40. Also, the embedding process is simplified. The side surfaces of the chips 10 and 20 are in contact with the insulating layers 36, 38 and 40, but may be separated from each other. Further, the gaps 31 may not be formed in the insulating layers 36, 38 and 40, and the chips 10 and 20 may be embedded in the insulating layers 36, 38 and 40.
- the chips 10 and 20 are, for example, a wafer level package (WLP) described later. Further, two gaps may be formed, and the chip 10 may be arranged in a gap different from the chip 20. The number of insulating layers and the number of conductor layers included in the substrate 30 can be changed.
- WLP wafer level package
- FIG. 4A is a plan view illustrating a ladder filter
- the filter 14 is an example of a ladder filter.
- series resonators S1 to S4 and parallel resonators P1 to P3 are provided on the surface 12a of the piezoelectric substrate 12.
- the series resonators S1 to S4 are connected in series between the input terminal In and the output terminal Out.
- the parallel resonator P1 is connected between S1 and S2, the parallel resonator P2 is connected between S2 and S3, and the parallel resonator P3 is connected between S3 and S4.
- the parallel resonators P1 to P3 are grounded.
- the resonators S1 to S4 and P1 to P3 are SAW resonators including the IDT 15 and the reflector 17.
- the terminals 13a and 13b in FIG. 3 function as the input terminal In and the output terminal Out.
- FIG. 4B is a plan view illustrating a multimode filter, and the filter 24 is an example of a multimode filter.
- IDTs 25a, 25b, and 25c are arranged on the surface 22a of the piezoelectric substrate 22 in order from the left along the elastic wave propagation direction, and the reflectors 27 sandwich the IDTs 25a to 25c. Is arranged. One comb electrode of the IDT 25a and one comb electrode of the IDT 25c are connected to the output terminal Out, respectively. One comb electrode of the IDT 25b is connected to the input terminal In. The other comb electrodes of the IDTs 25a to 25c are grounded.
- the two output terminals Out are balanced terminals, and the one input terminal In is an unbalanced terminal.
- the output terminal Out may be an unbalanced terminal.
- Terminals 23a and 23b in FIG. 3 include an output terminal Out and an input terminal In.
- the piezoelectric substrates 12 and 22 include a piezoelectric material such as lithium tantalate (LiTaO 3 ) or lithium niobate (LiNbO 3 ). Each IDT and reflector is made of a metal such as Al. The number of electrode fingers can be changed.
- the chips 10 and 20 may include at least one of a ladder type filter and a multimode filter, or may include an elastic wave filter other than these.
- Example 2 is an example of a module including a duplexer.
- FIG. 5A is a block diagram illustrating a module 200 according to the second embodiment.
- FIG. 5B is a plan view illustrating the module 200.
- FIG. 5C is a cross-sectional view taken along line AA in FIG.
- the conductor layer 45 is not shown in FIG. The description of the configuration described above with reference to FIGS.
- the transmission filter 60a and the reception filter 70a of the module 200 form a duplexer.
- a power amplifier (PA) 80 is electrically connected between the transmission terminal Tx and the transmission filter 60a, and a matching circuit 82a is electrically connected between the PA 80 and the transmission filter 60a.
- a matching circuit 82b is electrically connected between the transmission filter 60a and the antenna terminal Ant, and a matching circuit 82c is electrically connected between the reception filter 70a and the antenna terminal Ant.
- the matching circuit 82a matches the impedance between the transmission filter 60a and the PA 80.
- the matching circuit 82b matches the impedance between the antenna (not shown) connected to the antenna terminal Ant and the transmission filter 60a.
- the matching circuit 82c matches the impedance between the antenna and the reception filter 70a.
- the pass band of the transmission filter 60a may be different from or the same as the pass band of the reception filter 70a.
- the transmission filter 60a is, for example, a ladder type filter shown in FIG.
- the reception filter 70a is, for example, a multimode filter shown in FIG.
- the PA 80 and the chip component 82 are mounted on the upper surface of the substrate 30 (third substrate) and connected to the conductor layer 45.
- the chip 60 and the chip 70 are embedded in the insulating layer 36 of the substrate 30.
- the chip 60 is a WLP including a piezoelectric substrate 62, a transmission filter (not shown), terminals 63a and 63b, and a sealing portion 65.
- the transmission filter and terminals 63a and 63b are formed on the surface 62a.
- the transmission filter is sealed by a sealing portion 65 made of, for example, resin, and is exposed to a gap between the surface 62a and the sealing portion 65.
- the terminals 63a and 63b are electrically connected to the transmission filter and penetrate the sealing portion 65.
- the chip 70 is a WLP including a piezoelectric substrate 72, a reception filter (not shown), terminals 73 a and 73 b, and a sealing portion 75.
- the transmission filter included in the chip 60 functions as the transmission filter 60a in FIG. 5A
- the reception filter included in the chip 70 functions as the reception filter 70a.
- the side surface and upper surface of the chip 60, the side surface and lower surface of the chip 70, and the sealing portions 65 and 75 are in contact with the insulating layer 36.
- the conductor layer 45 includes wirings 45a to 45e.
- the conductor layer 58 includes an antenna terminal Ant, a transmission terminal Tx, a reception terminal Rx, and a ground terminal.
- the chip component 82 includes at least one of an inductor and a capacitor, and functions as the matching circuits 82a, 82b, and 82c in FIG.
- the terminal 63a of the chip 60 is electrically connected to the chip component 82 through the conductor layer 48, the via wiring 51, and the wiring 45a.
- the terminal 73b of the chip 70 is electrically connected to the chip component 82 in common with the terminal 63a through the conductor layers 54 and 48, the via wiring 51, and the wiring 45a.
- the terminal 63b of the chip 60 is electrically connected to the chip component 82 via the conductor layers 48 and 46, the via wiring 51, and the wiring 45b.
- the terminal 73 a of the chip 70 is electrically connected to the receiving terminal Rx via the conductor layers 54 and 56 and the via wiring 51.
- the chip component 82 is connected to the antenna terminal Ant via the wiring 45c, the conductor layers 46, 48, 54 and 56, and the via wiring 51, and is connected to the PA 80 via the wiring 45b.
- the PA 80 is connected to the transmission terminal Tx via the wiring 45d, the conductor layers 46, 48, 54 and 56, and the via wiring 51.
- PA 80 is an active element and generates heat. Heat generated in the PA 80 is released to the outside of the module 200 through the ground terminal GND connected to the PA 80 via the wiring 45e, the conductor layers 46, 48, 54 and 56, and the via wiring 51.
- the surface 62a faces the insulating layer 34.
- the surface 72a faces in the opposite direction to the surface 62a and faces the insulating layer 42. Therefore, according to the second embodiment, high isolation can be obtained in the module as in the first embodiment.
- Example 3 is an example of a module different from Example 2.
- FIG. 6A is a block diagram illustrating a module 300 according to the third embodiment.
- FIG. 6B is a plan view illustrating the module 300.
- FIG. 6C is a cross-sectional view taken along line AA in FIG. The description of the configuration already described in FIGS. 1B, 2 and 6C is omitted.
- a matching circuit 82d is connected between the reception terminal Rx and the reception filter 70a.
- the matching circuit 82d matches the impedance between a component (not shown) such as an IC connected to the reception terminal Rx and the reception filter 70a.
- a switch 84 is connected between the transmission filter 60a and the reception filter 70a and the antenna terminal Ant.
- the switch 84 selects a duplexer from among a duplexer including the transmission filter 60a and the reception filter 70a and another duplexer (not shown), and connects it to the antenna terminal Ant. For example, when the pass band of the transmission filter 60a is the same as the pass band of the reception filter 70a, the switch 84 may select one of the transmission filter 60a and the reception filter 70a and connect it to the antenna terminal Ant.
- the conductor layer 45 includes wirings 45f to 45i.
- the terminal 63 a of the chip 60 is connected to the transmission terminal Tx via the conductor layers 54 and 56 and the via wiring 51.
- the terminal 63b of the chip 60 is connected to the switch 84 through the conductor layers 54 and 48, the via wiring 51, and the wiring 45f.
- the terminal 73a of the chip 70 is connected to the switch 84 in common with the terminal 63b through the conductor layer 48, the via wiring 51, and the wiring 45f.
- the switch 84 is connected to the antenna terminal Ant via the wiring 45g, the conductor layers 46, 48, 54 and 56, and the via wiring 51.
- the terminal 73b of the chip 70 is connected to the chip component 82 via the conductor layers 48 and 46, the via wiring 51, and the wiring 45h.
- the chip component 82 is connected to the receiving terminal Rx via the wiring 45 i, the conductor layers 46, 48, 54 and 56, and the via wiring 51.
- Examples 2 and 3 are examples in which no gap is formed in the insulating layer 36 and the chip 60 and the chip 70 are embedded in the insulating layer 36.
- a gap may be formed in the insulating layer 36 like the gap 31 in FIG. 3, and the chip 60 and the chip 70 may be embedded in the gap.
- Embodiments 2 and 3 may be applied to a module including a dual filter.
- the conductor layer 58 includes input terminals In1 and In2 and output terminals Out1 and Out2 (see FIG. 1B).
- Examples of components to be mounted on the upper surface of the substrate 30 include an IC in addition to the PA 80, the chip component 82, and the switch 84, and any of these components may be used.
- a filter may be embedded in a single-layer substrate. The arrangement of the wiring (conductor layer and via wiring 51) connecting the filter and the component can also be changed according to the position of the component and the filter.
- Example 4 is an example in which the surface 12a and the surface 22a are located in different planes.
- FIG. 7 is a cross-sectional view illustrating a module 400 according to the fourth embodiment.
- the chip 10 is embedded in the insulating layers 36, 38 and 40.
- the chip 20 is embedded in the insulating layer 32 and is disposed on the chip 10 in the gap 33.
- the surface 12a and the surface 12b face the same direction.
- the surface 12 a is located in a plane that crosses the insulating layer 38 and faces the insulating layer 42.
- the surface 22 a is located in a plane that crosses the insulating layer 32 and faces the insulating layer 34. That is, the upper surface (first mounting surface) of the insulating layer 38 on which the chip 10 is mounted and the upper surface (second mounting surface) of the insulating layer 42 on which the chip 20 is mounted are located in different planes. For this reason, the distance between the filter 14 and the filter 24 is increased, and high isolation can be obtained.
- the terminal 23 a is connected to the conductor layer 58 through the conductor layer 46, the conductor layer 47 in the insulating layer 34, the conductor layers 48, 52, 54 and 56, and the via wiring 51.
- the terminal 23 b is connected to the conductor layer 58 via, for example, a conductor layer (not shown) provided on the insulating layer 34, conductor layers 46, 48, 52, 54 and 56, and via wiring 51.
- the chip component 82 and the switch 84 are embedded in the insulating layer 32, for example, the chip component 82 and the switch 84 may not be provided.
- the chip 10 and the chip 20 overlap in the thickness direction of the substrate 30, but do not need to overlap. Further, the chip 10 may be provided on the chip 20.
- the chips 10 and 20 may be embedded without forming the gaps 31 and 33 in the insulating layer of the substrate 30.
- the surface 22a is located in a different plane from the surface 12a, so that high isolation can be obtained.
- the transmission filter may include a multimode filter, and the reception filter may include a ladder type filter.
- the filter may include other SAW filters.
- the filter is an SAW filter, but other elastic wave filters including an IDT such as a boundary acoustic wave filter and a Love wave resonator may be used.
- an elastic wave filter including a piezoelectric thin film resonator may be applied.
- FBAR Fanm
- FIG. 8 is a cross-sectional view illustrating the FBAR 90.
- a gap 91 is formed in the substrate 92.
- a lower electrode 94 a is formed on the surface 92 a of the substrate 92 so as to overlap the gap 91.
- a piezoelectric thin film 96 is formed on the lower electrode 94 a, and an upper electrode 94 b is formed on the piezoelectric thin film 96.
- a resonance region 93 where the lower electrode 94 a, the upper electrode 94 b and the piezoelectric thin film 96 overlap is formed on the gap 91.
- a laminated body of the lower electrode 94a, the upper electrode 94b, and the piezoelectric thin film 96 functions as a resonator.
- An elastic wave filter using the FBAR 90 may be applied to the first to third embodiments.
- the surface 92a of the chip 20 may be directed in the opposite direction to the surface 92a of the chip 10.
- the surface 92 a of the chip 10 may be opposed to the insulating layer 42, and the surface 92 a of the chip 20 may be opposed to the insulating layer 34.
- at least one of the filters 14 and 20 may be an elastic wave filter including IDT or an elastic wave filter including FBAR.
- the substrate 92 is formed of an insulator such as glass, silicon (Si), or sapphire.
- the piezoelectric thin film 96 includes a piezoelectric material such as aluminum nitride (AlN).
- the lower electrode 94a and the upper electrode 94b are made of a metal such as ruthenium (Ru), for example.
- Ru ruthenium
- the lower electrode 94a may not be exposed in the gap 91.
- the gap 91 may penetrate the substrate 92 or may not penetrate.
- a portion where the resonance region 93 of the lower electrode 94 a is formed may be provided so as to protrude from the surface 92 a of the substrate 92 without forming the gap 91 in the substrate 92.
- the surface 92a is flat, and a gap is generated between the surface 92a and the lower electrode 94a.
- other piezoelectric thin film resonators such as SMR (Solid-Mounted Resonator) in which an acoustic reflection film is formed on the surface 92a and a lower electrode 94a is provided on the acoustic reflection film may be used.
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Description
前記第1チップ及び前記第2チップは、前記第3基板の異なる絶縁層に埋め込まれている構成とすることができる。
12、22、62、72 圧電基板
12a、22a、62a、72a、92a 面
14、24、F3、F4 フィルタ
15、25 IDT
17、27 反射器
30 基板
32、34、36、38、40、42、44 絶縁層
46、48、50、52、54、56、58 導体層
51 ビア配線
60a、F1 送信フィルタ
70a、F2 受信フィルタ
80 PA
82 チップ部品
84 スイッチ
90 FBAR
92 基板
S1、S2、S3、S4 直列共振子
P1、P2、P3 並列共振子
Claims (13)
- 第1基板、及び第1基板の第1面に形成された第1フィルタを含む第1チップと、
第2基板、及び第2基板の前記第1面とは異なる平面内に位置する第2面に形成された第2フィルタを含む第2チップと、を具備することを特徴とする弾性波デバイス。 - 前記第2面は前記第1面とは反対方向を向いていることを特徴とする請求項1記載の弾性波デバイス。
- 前記第1面と前記第2面とは同じ方向を向き、
前記第1チップが実装される第1実装面と、前記第2チップが実装される第2実装面とは異なる平面内に位置し、
前記第2チップは前記第1チップ上に設けられていることを特徴とする請求項1記載の弾性波デバイス。 - 前記第1フィルタの通過帯域は前記第2フィルタの通過帯域と異なることを特徴とする請求項1から3いずれか一項記載の弾性波デバイス。
- 前記第1チップは、前記第1面に形成され、前記第1フィルタと接続され、前記第1チップの外部と信号の入力又は出力を行う第1端子を含み、
前記第2チップは、前記第2面に形成され、前記第2フィルタと接続され、前記第2チップの外部と信号の入力又は出力を行う第2端子を含むことを特徴とする請求項1から4いずれか一項記載の弾性波デバイス。 - 第3基板を具備し、
前記第1チップ及び前記第2チップは、前記第3基板に埋め込まれていることを特徴とする請求項1から5いずれか一項記載の弾性波デバイス。 - 前記第3基板は積層された複数の絶縁層を含み、
前記第1チップ及び前記第2チップは、前記第3基板に含まれる同一の絶縁層に埋め込まれていることを特徴とする請求項6記載の弾性波デバイス。 - 前記第3基板は積層された複数の絶縁層を含み、
前記第1チップ及び前記第2チップは、前記第3基板の異なる絶縁層に埋め込まれていることを特徴とする請求項6記載の弾性波デバイス。 - 前記第3基板に設けられた部品と、
前記第3基板に設けられ、前記第1チップ及び前記第2チップと前記部品とを接続する配線と、を具備することを特徴とする請求項6から8いずれか一項記載の弾性波デバイス。 - 前記第1フィルタは共通端子と送信端子との間に接続された送信フィルタであり、
前記第2フィルタは前記共通端子と受信端子との間に接続された受信フィルタであることを特徴とする請求項1から9いずれか一項記載の弾性波デバイス。 - 前記第1フィルタと前記第2フィルタとは接続されていないことを特徴とする請求項1から10いずれか一項記載の弾性波デバイス。
- 前記第1基板及び前記第2基板は圧電基板であり、
前記第1フィルタ及び前記第2フィルタの少なくとも一方はIDTを含むことを特徴とする請求項1から11いずれか一項記載の弾性波デバイス。 - 前記第1フィルタ及び前記第2フィルタの少なくとも一方は圧電薄膜共振子を含むことを特徴とする請求項1から12いずれか一項記載の弾性波デバイス。
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JP2014501849A JP5991785B2 (ja) | 2012-02-27 | 2012-02-27 | 弾性波デバイス |
PCT/JP2012/054750 WO2013128541A1 (ja) | 2012-02-27 | 2012-02-27 | 弾性波デバイス |
DE112012005948.4T DE112012005948T5 (de) | 2012-02-27 | 2012-02-27 | Akustikwellenvorrichtung |
US14/463,441 US9667221B2 (en) | 2012-02-27 | 2014-08-19 | Acoustic wave device |
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JP5991785B2 (ja) | 2016-09-14 |
US9667221B2 (en) | 2017-05-30 |
JPWO2013128541A1 (ja) | 2015-07-30 |
US20140354374A1 (en) | 2014-12-04 |
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