WO2022168498A1 - 複合基板、弾性表面波素子および複合基板の製造方法 - Google Patents
複合基板、弾性表面波素子および複合基板の製造方法 Download PDFInfo
- Publication number
- WO2022168498A1 WO2022168498A1 PCT/JP2021/048175 JP2021048175W WO2022168498A1 WO 2022168498 A1 WO2022168498 A1 WO 2022168498A1 JP 2021048175 W JP2021048175 W JP 2021048175W WO 2022168498 A1 WO2022168498 A1 WO 2022168498A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- composite substrate
- impedance
- piezoelectric
- substrate
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 143
- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 238000010897 surface acoustic wave method Methods 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims description 19
- 238000005498 polishing Methods 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910000449 hafnium oxide Inorganic materials 0.000 claims description 8
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001936 tantalum oxide Inorganic materials 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 20
- 238000000034 method Methods 0.000 description 15
- 125000004429 atom Chemical group 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 238000003917 TEM image Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000007735 ion beam assisted deposition Methods 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 230000004913 activation Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000000560 X-ray reflectometry Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 238000005001 rutherford backscattering spectroscopy Methods 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Natural products CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- -1 sialon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02866—Means for compensation or elimination of undesirable effects of bulk wave excitation and reflections
-
- 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
- H03H9/02543—Characteristics of substrate, e.g. cutting angles
- H03H9/02574—Characteristics of substrate, e.g. cutting angles of combined substrates, multilayered substrates, piezoelectrical layers on not-piezoelectrical substrate
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/08—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of resonators or networks using surface acoustic waves
-
- 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
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02826—Means for compensation or elimination of undesirable effects of adherence
-
- 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
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/25—Constructional features of resonators using surface acoustic waves
-
- 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
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02897—Means for compensation or elimination of undesirable effects of strain or mechanical damage, e.g. strain due to bending influence
Definitions
- the present invention relates to a composite substrate, a surface acoustic wave device, and a method for manufacturing a composite substrate.
- SAW filters using surface acoustic waves
- This SAW filter has a structure in which electrodes and the like are formed on a composite substrate having a piezoelectric layer (see Patent Document 1, for example).
- the composite substrate is also required to have durability (for example, durability during processing).
- the main purpose of the present invention is to provide a composite substrate with excellent durability while confining elastic wave energy in the piezoelectric layer.
- a composite substrate according to an embodiment of the present invention has a piezoelectric layer and a reflective layer disposed on the back side of the piezoelectric layer and including a low-impedance layer containing silicon oxide and a high-impedance layer.
- a modified layer is formed on the side edge, and the density of the low impedance layer is 2.15 g/cm 3 or more.
- the modified layer has a thickness of 0.3 nm or more.
- the modified layer has a thickness of 4.5 nm or less.
- the modified layer contains an amorphous body.
- the content of silicon atoms in the modified layer is less than 10 atom %.
- the high impedance layer contains at least one selected from the group consisting of hafnium oxide, tantalum oxide, zirconium oxide and aluminum oxide.
- each of the high impedance layer and the low impedance layer has a thickness of 0.01 ⁇ m to 1 ⁇ m.
- the high impedance layers and the low impedance layers are alternately laminated.
- the composite substrate has a support substrate arranged on the back side of the reflective layer.
- the composite substrate has a bonding layer arranged between the reflective layer and the support substrate.
- a surface acoustic wave device includes the above composite substrate.
- a method for manufacturing a composite substrate comprises: forming a modified layer on an end portion of a piezoelectric substrate having a first main surface and a second main surface facing each other on the side of the first main surface; forming a low impedance layer containing silicon oxide and having a density of 2.15 g/cm 3 or more on the surface side; depositing an impedance layer.
- the modified layer has a thickness of 0.3 nm or more.
- the modified layer has a thickness of 4.5 nm or less.
- the manufacturing method further includes polishing the second main surface side surface of the piezoelectric substrate on which the low impedance layer and the high impedance layer are formed.
- the present invention has a piezoelectric layer (piezoelectric substrate) and a reflective layer including a low-impedance layer having a predetermined density, and a modified layer is formed at the end of the piezoelectric layer (piezoelectric substrate).
- a piezoelectric layer piezoelectric substrate
- a reflective layer including a low-impedance layer having a predetermined density
- a modified layer is formed at the end of the piezoelectric layer (piezoelectric substrate).
- FIG. 1 is a schematic cross-sectional view showing a schematic configuration of a composite substrate according to one embodiment of the present invention
- FIG. It is a figure which shows the example of a manufacturing process of the composite substrate which concerns on one embodiment.
- FIG. 2B is a continuation of FIG. 2A
- FIG. 2C is a continuation of FIG. 2B
- FIG. 2C is a continuation of FIG. 2C
- FIG. 2C is a continuation of FIG. 2D
- 4 is a cross-sectional TEM image of the composite substrate (first silicon oxide layer) of Example 2.
- FIG. 4 is a cross-sectional TEM image of the composite substrate (first silicon oxide layer) of Comparative Example 5.
- FIG. 1 is a schematic cross-sectional view showing a schematic configuration of a composite substrate according to one embodiment of the present invention.
- the composite substrate 100 has a piezoelectric layer 10, a reflective layer 20 and a support substrate 30 in this order.
- a modified layer 14 is formed at the end of the piezoelectric layer 10 on the side where the reflective layer 20 is arranged. By forming such a layer, a composite substrate having excellent durability can be obtained.
- the reflective layer 20 includes a high impedance layer with relatively high acoustic impedance and a low impedance layer with relatively low acoustic impedance.
- the reflective layer 20 is a laminate of a plurality of impedance layers.
- the reflective layer 20 includes, from the piezoelectric layer 10 side, a low impedance layer 21, a high impedance layer 22, a low impedance layer 23, a high impedance layer 24, a low impedance layer 25, a high impedance layer 26, a low impedance layer 27 and a It has a high impedance layer 28 in this order.
- the low impedance layer 21 is arranged closest to the piezoelectric layer 10 side. By arranging the reflective layer 20 having such a laminated structure, the energy of the elastic wave can be effectively confined to the piezoelectric layer 10 side.
- the low-impedance layer closest to the piezoelectric layer 10 is sometimes referred to as the first low-impedance layer.
- the reflective layer 20 is a laminate of a total of eight layers consisting of four high-impedance layers and four low-impedance layers, but the number of impedance layers included in the reflective layer is not limited to this.
- the reflective layer may include at least one high-impedance layer and at least one low-impedance layer having different acoustic impedances.
- the reflective layer has a multilayer structure of four or more layers.
- composite substrate 100 may further have arbitrary layers.
- the type/function, number, combination, arrangement, etc. of such layers can be appropriately set according to the purpose.
- composite substrate 100 may have a bonding layer disposed between reflective layer 20 and support substrate 30 .
- the composite substrate 100 can be manufactured in any suitable shape. In one embodiment, it can be manufactured in so-called wafer form.
- the size of the composite substrate 100 can be appropriately set according to the purpose. For example, the wafer diameter is between 50 mm and 150 mm.
- A-1. Piezoelectric Layer Any appropriate piezoelectric material can be used as a material constituting the piezoelectric layer.
- piezoelectric material a single crystal with the composition LiAO 3 is preferably used.
- A is one or more elements selected from the group consisting of niobium and tantalum.
- LiAO 3 may be lithium niobate (LiNbO 3 ), lithium tantalate (LiTaO 3 ), or a lithium niobate-lithium tantalate solid solution.
- the piezoelectric layer When the piezoelectric material is lithium tantalate, from the viewpoint of reducing propagation loss, the piezoelectric layer has a normal direction from the Y axis to the Z axis, centered on the X axis, which is the propagation direction of surface acoustic waves. It is preferable to use a direction rotated by 133° (eg, 128°).
- the piezoelectric material is lithium niobate
- the piezoelectric layer has a normal direction from the Y axis to the Z axis with the X axis being the propagation direction of the surface acoustic wave as the center. It is preferable to use a direction rotated by 114° (eg, 110°).
- the thickness of the piezoelectric layer is, for example, 0.2 ⁇ m or more and 5 ⁇ m or less.
- the modified layer is made of, for example, an amorphous material and contains an element that constitutes the piezoelectric layer.
- the modified layer contains tantalum (Ta) and oxygen (O).
- the content of silicon atoms (Si) when the total of Ta, O, Si and Ar in the modified layer is 100 atom% may be less than 10 atom% and 5 atom% or less. There may be.
- the composition of the modified layer can be determined by energy dispersive X-ray analysis (EDX).
- the thickness of the modified layer is, for example, 0.3 nm or more, preferably 0.5 nm or more.
- the thickness of the modified layer is, for example, 4.5 nm or less, preferably 4 nm or less. With such a thickness, a higher Q value can be achieved.
- the reflective layer includes a high-impedance layer and a low-impedance layer with different acoustic impedances.
- the acoustic impedance of the high impedance layer is relatively higher than the acoustic impedance of the low impedance layer.
- the acoustic impedance of the material forming the high impedance layer is higher than the acoustic impedance of the material forming the low impedance layer.
- a plurality of high-impedance layers included in the reflective layer may each have the same configuration (eg, material, thickness), or may have different configurations.
- the plurality of low-impedance layers included in the reflective layer may each have the same configuration (eg, material, thickness, density) or may have different configurations.
- Examples of materials that make up the high impedance layer include hafnium oxide, tantalum oxide, zirconium oxide, and aluminum oxide. Among these, hafnium oxide is preferably used. By using hafnium oxide, the energy of elastic waves can be more effectively confined on the piezoelectric layer side.
- the thickness of the high impedance layer is, for example, 0.01 ⁇ m to 1 ⁇ m, preferably 20 nm to 500 nm, more preferably 100 nm to 300 nm.
- a typical example of a material that constitutes the low impedance layer is silicon oxide.
- the content of silicon oxide in the low impedance layer is, for example, 97% by weight or more.
- the ratio of oxygen atoms to silicon atoms (O/Si) contained in the low impedance layer is, for example, 1.85 or more and 2.05 or less.
- the composition of the low impedance layer can be confirmed by Rutherford Backscattering Spectroscopy (RBS). For analysis, a sample obtained by separately forming a low-impedance layer on a suitable substrate under the same conditions can be used.
- the thickness of the low impedance layer is, for example, 0.01 ⁇ m to 1 ⁇ m, preferably 20 nm to 500 nm, more preferably 100 nm to 300 nm.
- the density of the low impedance layer is 2.15 g/cm 3 or more.
- the low impedance layer having such a density is a dense film, and the generation of structural defects such as nanopores can be suppressed.
- an excellent reflective layer can be obtained and a high Q value can be achieved.
- a high Q value can be secured even in combination with the modified layer.
- the low impedance layer having such a density can contribute to improvement in adhesion to the piezoelectric layer.
- a modified layer is easily formed in the adjacent layer (substrate), and a composite substrate having excellent durability can be obtained.
- the density of the low impedance layer may be 2.2 g/cm 3 or higher, 2.25 g/cm 3 or higher, or 2.3 g/cm 3 or higher.
- a composite substrate having excellent heat resistance can be obtained.
- the composite substrate is subjected to processing that requires heat of 200° C. or higher, it is possible to suppress the occurrence of peeling within the composite substrate (specifically, peeling within the reflective layer). As a cause of such peeling, it is conceivable that the movement of moisture taken into the impedance layer (typically, the voids) becomes active due to heating.
- the density of the low impedance layer is, for example, 2.5 g/cm 3 or less.
- At least one low-impedance layer (for example, the first low-impedance layer) included in the reflective layer should satisfy the above density, but it is preferable that all the low-impedance layers included in the reflective layer satisfy the above density.
- the density of the impedance layer can be obtained by X-ray reflectometry (XRR).
- the impedance layer can be deposited by any appropriate method. For example, it can be deposited by sputtering, physical vapor deposition such as ion beam assisted deposition (IAD), chemical vapor deposition, or atomic layer deposition (ALD). Preferably, an IAD is employed. By employing IAD, a dense impedance layer can be deposited and the above density can be achieved well. In addition, when forming the first low impedance layer, the modified layer can be satisfactorily formed on the adjacent layer (substrate). For example, a modified layer having a desired thickness can be formed.
- IAD ion beam assisted deposition
- ALD atomic layer deposition
- the support substrate may be composed of a single crystal or may be composed of a polycrystal. Materials constituting the support substrate are preferably selected from the group consisting of silicon, sialon, sapphire, cordierite, mullite, glass, quartz, crystal and alumina.
- the above silicon may be monocrystalline silicon, polycrystalline silicon, or high resistance silicon.
- the sialon is a ceramic obtained by sintering a mixture of silicon nitride and alumina, and has a composition represented by, for example, Si 6-w Al w O w N 8-w .
- sialon has a composition in which alumina is mixed in silicon nitride, and w in the formula indicates the mixing ratio of alumina.
- w is preferably 0.5 or more and 4.0 or less.
- the sapphire is a single crystal with a composition of Al 2 O 3 and the alumina is a polycrystal with a composition of Al 2 O 3 .
- Alumina is preferably translucent alumina.
- the cordierite is a ceramic having a composition of 2MgO.2Al 2 O 3.5SiO 2
- the mullite has a composition in the range of 3Al 2 O 3.2SiO 2 to 2Al 2 O 3.SiO 2 . It is a ceramic with
- the thermal expansion coefficient of the material forming the support substrate is preferably smaller than the thermal expansion coefficient of the material forming the piezoelectric layer.
- Such a support substrate can suppress changes in the shape and size of the piezoelectric layer when temperature changes, and can suppress, for example, changes in the frequency characteristics of the obtained surface acoustic wave device.
- the thickness of the support substrate is, for example, 100 ⁇ m to 1000 ⁇ m.
- the composite substrate may have a bonding layer.
- materials forming the bonding layer include silicon oxide, silicon, tantalum oxide, niobium oxide, aluminum oxide, titanium oxide, and hafnium oxide.
- the thickness of the bonding layer is, for example, 0.005 ⁇ m to 1 ⁇ m.
- the bonding layer can be deposited by any appropriate method. Specifically, it can be formed by a method similar to the method for forming the impedance layer.
- Manufacturing Method A method for manufacturing a composite substrate according to one embodiment of the present invention forms a modified layer on the end portion of the first main surface side of a piezoelectric substrate having a first main surface and a second main surface facing each other. forming a low-impedance layer containing silicon oxide on the first main surface side of the piezoelectric substrate; and forming a high-impedance layer on the first main surface side of the piezoelectric substrate on which the low-impedance layer is formed. including to do.
- the composite substrate is obtained by forming the modified layer on the piezoelectric substrate, successively forming the impedance layers constituting the reflective layer, and directly connecting the piezoelectric substrate on which the reflective layer is formed and the support substrate. It can be obtained by joining.
- the thickness of the piezoelectric substrate is, for example, 200 ⁇ m or more and 1000 ⁇ m or less.
- FIG. 2A to 2E are diagrams showing an example of a manufacturing process for a composite substrate according to one embodiment.
- a modified layer 14 is formed on the end (upper end) on the first principal surface side of a piezoelectric substrate 12 having a first principal surface and a second principal surface facing each other, and a second 1 shows a state in which the film formation of the low impedance layer 21 is completed.
- the modified layer 14 is preferably a layer formed by modifying the upper end portion of the piezoelectric substrate 12 .
- Such a modified layer is formed, for example, by vapor-depositing a film-forming material on the piezoelectric substrate 12 while applying energy (for example, ion energy) to the film-forming material of the first low impedance layer 21 .
- energy for example, ion energy
- the impedance layers 22 to 28 are sequentially formed on the low impedance layer 21 to form the reflective layer 20 as shown in FIG. 2B.
- the impedance layers 21 to 28 may be formed by the same method and conditions, or may be formed by different methods and conditions.
- FIG. 2C shows a state in which the bonding layer 40 is formed on the reflective layer 20
- FIG. 2D shows a step of directly bonding the piezoelectric substrate 12 on which the reflective layer 20 and the bonding layer 40 are formed and the support substrate 30.
- the bonding surfaces are preferably activated by any appropriate activation treatment.
- the activated surface of the bonding layer 40 and the activated surface of the supporting substrate 30 are brought into contact with each other and pressed to directly bond. do.
- the composite substrate 110 shown in FIG. 2E is obtained.
- the surface (lower surface) 12a on the second main surface side of the piezoelectric substrate 12 of the obtained composite substrate 110 is typically processed by grinding, polishing, or the like so as to form the piezoelectric layer with the desired thickness. be.
- the composite substrate 110 can have excellent durability. For example, it can have excellent durability during processing such as grinding and polishing. Specifically, it is possible to suppress peeling of the composite substrate (specifically, peeling near the boundary between the piezoelectric substrate 12 and the low impedance layer 21) due to processing such as grinding and polishing. As a result, it is possible to obtain a high-quality composite substrate without peeling.
- the surface of each layer is a flat surface.
- the arithmetic mean roughness Ra of the surface of each layer is preferably 1 nm or less, more preferably 0.3 nm or less.
- methods for flattening the surface of each layer include mirror polishing, lap polishing, and chemical mechanical polishing (CMP).
- abrasive residue for example, abrasive residue, process-affected layer, and the like.
- cleaning methods include wet cleaning, dry cleaning, and scrub cleaning.
- scrub cleaning is preferred because it allows simple and efficient cleaning.
- a cleaning agent for example, Sunwash series manufactured by Lion Corporation
- a solvent for example, a mixed solution of acetone and isopropyl alcohol (IPA)
- IPA isopropyl alcohol
- the activation treatment is typically performed by irradiating a neutralizing beam.
- an apparatus such as the apparatus described in JP-A-2014-086400 is used to generate a neutralizing beam, and the activation treatment is performed by irradiating this beam.
- a saddle field fast atom beam source is used as the beam source, an inert gas such as argon or nitrogen is introduced into the chamber, and a high voltage is applied to the electrodes from a DC power supply. Electrons are moved by a saddle field type electric field generated between the electrode (positive electrode) and the housing (negative electrode), and a beam of atoms and ions is generated by the inert gas.
- the ion beam is neutralized by the grid, so that a beam of neutral atoms is emitted from the fast atom beam source.
- the voltage during activation by beam irradiation is preferably 0.5 kV to 2.0 kV, and the current during activation by beam irradiation is preferably 50 mA to 200 mA.
- the contact and pressurization of the joint surfaces are preferably performed in a vacuum atmosphere.
- the temperature at this time is typically room temperature. Specifically, the temperature is preferably 20° C. or higher and 40° C. or lower, more preferably 25° C. or higher and 30° C. or lower.
- the applied pressure is preferably 100N to 20000N.
- a surface acoustic wave device includes the composite substrate. According to the composite substrate, a high Q value can be achieved. Further, since the composite substrate is excellent in durability, for example, the surface acoustic wave element obtained by processing the composite substrate, such as formation of electrodes and the like, cutting, etc., is suppressed from being peeled off, cracked, and the like. Excellent quality.
- Such a surface acoustic wave device is suitably used as a SAW filter for communication equipment such as mobile phones.
- Example 1 A lithium tantalate (LT) substrate having an orientation flat (OF) portion and a diameter of 4 inches and a thickness of 250 ⁇ m (where X is the propagation direction of surface acoustic waves (SAW), and the cutting angle is 128° Y, which is a rotated Y-cut plate).
- LT substrate for cut X propagation was prepared.
- the surface of this LT substrate was mirror-polished so that the arithmetic mean roughness Ra was 0.3 nm.
- the arithmetic mean roughness Ra is a value measured with an atomic force microscope (AFM) in a field of view of 10 ⁇ m ⁇ 10 ⁇ m.
- AFM atomic force microscope
- the film formation rate was 0.5 nm/sec.
- a reflective layer as shown in FIG. 1 was formed.
- a silicon oxide layer (thickness: 80-190 nm, arithmetic mean roughness Ra: 0.2-0.6 nm) was formed on the reflective layer.
- the film was formed by a DC sputtering method using a boron-doped Si target.
- oxygen gas was introduced as an oxygen source.
- the total pressure and oxygen partial pressure of the atmosphere in the chamber were adjusted by adjusting the amount of oxygen gas introduced.
- the surface of the silicon oxide layer was subjected to chemical mechanical polishing (CMP) to form a bonding layer (thickness: 50 nm, arithmetic mean roughness Ra: 0.08 to 0.4 nm).
- a support substrate made of silicon having an OF portion and a diameter of 4 inches and a thickness of 500 ⁇ m was prepared.
- the surface of this support substrate is subjected to chemical mechanical polishing (CMP) and has an arithmetic mean roughness Ra of 0.2 nm.
- both substrates were placed in a vacuum chamber and evacuated to the order of 10 ⁇ 6 Pa, and then the surfaces of both substrates were subjected to high-speed An atomic beam (accelerating voltage of 1 kV, Ar flow rate of 27 sccm) was applied for 120 seconds. After the irradiation, the beam-irradiated surfaces of both substrates were overlapped, and a pressure of 10000 N was applied for 2 minutes to join the substrates. After that, the resulting joined body was heated at 100° C. for 20 hours.
- An atomic beam accelerating voltage of 1 kV, Ar flow rate of 27 sccm
- the back surface of the LT substrate of the bonded body was ground and polished from the original 250 ⁇ m to 0.5 ⁇ m to obtain a composite substrate having a piezoelectric layer with a thickness of 0.5 ⁇ m.
- Examples 2 to 6 and Comparative Examples 1 to 5 A composite substrate was obtained in the same manner as in Example 1, except that the conditions for forming the first silicon oxide layer (thickness: 150 nm) by the IAD method were changed.
- a fully automatic multi-purpose X-ray diffractometer (“SmartLab” manufactured by Rigaku), incident X-ray wavelength 0.15418 nm (CuK ⁇ ray), X-ray output 45 kV, 200 mA, measurement range (angle with sample surface) 0
- the analysis was performed under conditions of 0.0 to 4.0° and a measurement step of 0.01°.
- a substrate for example, a silicon substrate, a lithium niobate substrate, a lithium tantalate substrate
- the density of the silicon oxide layer was obtained by classifying the substrate, the modified layer, and the silicon oxide layer into the three layers and analyzing them.
- the analysis model is divided into two, the substrate and the silicon oxide layer. Density was determined. 3. Measurement of Q Value The frequency characteristics of the surface acoustic wave device obtained by forming comb-shaped electrodes on the surface of the piezoelectric layer of the composite substrate were measured using a network analyzer. The resonance frequency fr and its half width ⁇ fr were determined from the obtained frequency characteristics, and the Q value was calculated from fr/ ⁇ fr. 4. Durability For each example and comparative example, the durability was evaluated by observing under a microscope before and after grinding and polishing the back surface of the LT substrate to confirm whether or not the composite substrate was peeled off.
- the modified layer was analyzed by energy dispersive X-ray spectroscopy (EDX), Ta, O and a trace amount of Ar were detected.
- a measurement sample (a silicon oxide layer formed on an LT substrate) was prepared under the same conditions as in Example 2, and the composition of the modified layer was analyzed using an atomic resolution analysis electron microscope (manufactured by JEOL, JEM-ARM200F Dual-X ) and an energy dispersive X-ray spectrometer (manufactured by JEOL, JED-2300), an acceleration voltage of 200 kV, a beam spot size of about 0.2 nm ⁇ , and STEM-EDX observation.
- a composite substrate according to one embodiment of the present invention can be suitably used for a surface acoustic wave device.
- piezoelectric layer 14 modified layer 20 reflective layer 21 low impedance layer 22 high impedance layer 23 low impedance layer 24 high impedance layer 25 low impedance layer 26 high impedance layer 27 low impedance layer 28 high impedance layer 30 support substrate 40 bonding layer 100 composite Substrate 110 Composite substrate
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
1つの実施形態においては、上記改質層の厚みは0.3nm以上である。
1つの実施形態においては、上記改質層の厚みは4.5nm以下である。
1つの実施形態においては、上記改質層は非晶質体を含む。
1つの実施形態においては、上記改質層のケイ素原子の含有量は10atom%未満である。
1つの実施形態においては、上記高インピーダンス層は、酸化ハフニウム、酸化タンタル、酸化ジルコニウムおよび酸化アルミニウムからなる群から選択される少なくとも1つを含む。
1つの実施形態においては、上記高インピーダンス層および上記低インピーダンス層の厚みは、それぞれ0.01μm~1μmである。
1つの実施形態においては、上記反射層において、上記高インピーダンス層と上記低インピーダンス層とは交互に積層されている。
1つの実施形態においては、上記複合基板は、上記反射層の裏面側に配置される支持基板を有する。
1つの実施形態においては、上記複合基板は、上記反射層と上記支持基板との間に配置される接合層を有する。
本発明の別の実施形態による弾性表面波素子は、上記複合基板を含む。
1つの実施形態においては、上記改質層の厚みは0.3nm以上である。
1つの実施形態においては、上記改質層の厚みは4.5nm以下である。
1つの実施形態においては、上記製造方法は、上記低インピーダンス層および上記高インピーダンス層が成膜された上記圧電基板の第二主面側の表面を研磨することをさらに含む。
図1は、本発明の1つの実施形態に係る複合基板の概略の構成を示す模式的な断面図である。複合基板100は、圧電層10、反射層20および支持基板30をこの順に有する。圧電層10の反射層20が配置される側の端部には、改質層14が形成される。このような層が形成されていることにより、耐久性に優れた複合基板を得ることができる。反射層20は、相対的に音響インピーダンスが高い高インピーダンス層と相対的に音響インピーダンスが低い低インピーダンス層とを含む。反射層20は、複数のインピーダンス層の積層体であり、例えば、低インピーダンス層と高インピーダンス層とは交互に積層されている。図示例では、反射層20は、圧電層10側から、低インピーダンス層21、高インピーダンス層22、低インピーダンス層23、高インピーダンス層24、低インピーダンス層25、高インピーダンス層26、低インピーダンス層27および高インピーダンス層28を、この順に有する。反射層20の各層のうち、低インピーダンス層21が、最も圧電層10側に配置されている。このような積層構造の反射層20を配置させることにより、弾性波のエネルギーを圧電層10側に効果的に閉じ込めることができる。なお、最も圧電層10側に配置されている低インピーダンス層を、第一低インピーダンス層と称することがある。
上記圧電層を構成する材料としては、任意の適切な圧電性材料が用いられ得る。圧電性材料としては、好ましくは、LiAO3の組成を有する単結晶が用いられる。ここで、Aは、ニオブおよびタンタルからなる群から選択される一種以上の元素である。具体的には、LiAO3は、ニオブ酸リチウム(LiNbO3)であってもよく、タンタル酸リチウム(LiTaO3)であってもよく、ニオブ酸リチウム-タンタル酸リチウム固溶体であってもよい。
上述のとおり、反射層は、音響インピーダンスが異なる高インピーダンス層と低インピーダンス層とを含む。高インピーダンス層の音響インピーダンスは、低インピーダンス層の音響インピーダンスよりも相対的に高い。具体的には、高インピーダンス層を構成する材料の音響インピーダンスは、低インピーダンス層を構成する材料の音響インピーダンスよりも高い。
支持基板30としては、任意の適切な基板が用いられ得る。支持基板は、単結晶体で構成されてもよく、多結晶体で構成されてもよい。支持基板を構成する材料としては、好ましくは、シリコン、サイアロン、サファイア、コージェライト、ムライト、ガラス、石英、水晶およびアルミナからなる群から選択される。
上述のとおり、複合基板は、接合層を有し得る。接合層を構成する材料としては、例えば、ケイ素酸化物、シリコン、酸化タンタル、酸化ニオブ、酸化アルミニウム、酸化チタン、酸化ハフニウムが挙げられる。接合層の厚みは、例えば0.005μm~1μmである。
本発明の1つの実施形態に係る複合基板の製造方法は、互いに対向する第一主面および第二主面を有する圧電基板の第一主面側の端部に改質層を形成すること、圧電基板の第一主面側に、酸化ケイ素を含む低インピーダンス層を成膜すること、および、低インピーダンス層が成膜された圧電基板の第一主面側に高インピーダンス層を成膜すること、を含む。
本発明に係る弾性表面波素子は、上記複合基板を含む。上記複合基板によれば、高いQ値を達成し得る。また、上記複合基板は耐久性に優れることから、例えば、上記複合基板に、電極等の形成、切断等の加工を施して得られる弾性表面波素子は、剥がれ、割れ等の発生が抑制され、品質に優れ得る。このような弾性表面波素子は、SAWフィルタとして携帯電話等の通信機器に好適に用いられる。
オリエンテーションフラット(OF)部を有し、直径4インチで厚み250μmのタンタル酸リチウム(LT)基板(弾性表面波(SAW)の伝搬方向をXとし、切り出し角が回転Yカット板である128°YカットX伝搬のLT基板)を用意した。このLT基板の表面を、算術平均粗さRaが0.3nmとなるように鏡面研磨した。ここで、算術平均粗さRaは、原子間力顕微鏡(AFM)によって10μm×10μmの視野で測定した値である。
IAD法による第一酸化ケイ素層(厚み:150nm)の成膜条件を変更したこと以外は実施例1と同様にして、複合基板を得た。
得られた複合基板について下記の評価を行った。評価結果を表1にまとめる。
1.改質層の確認
電界放出型透過型電子顕微鏡(JEOL社製の「JEM-F200」)による観察(TEM観察)により、LT基板の改質層の形成の有無を確認した。TEM観察用の試料はFIB法により作製し、TEM観察の加速電圧は200kV、倍率は540万倍とした。一例として、実施例2の複合基板(第一酸化ケイ素層)の断面TEM像を図3に、比較例5の複合基板(第一酸化ケイ素層)の断面TEM像を図4に示す。
改質層が観察された場合、その厚みを測定した。具体的には、得られたTEM画像において、LT基板の結晶構造が確認できる箇所から、酸化ケイ素層の色味(トーン)と改質層の色味との中間の色味の箇所までを改質層として、その厚みを測定した。なお、測定箇所は、得られたTEM画像内で最も厚みが厚い箇所とした。
2.密度の測定
X線反射率法(XRR)にて密度を求めた。
全自動多目的X線回折装置(リガク社製の「SmartLab」)を用いて、入射X線波長0.15418nm(CuKα線)、X線出力45kV、200mA、測定範囲(試料表面とのなす角)0.0~4.0°、測定ステップ0.01°の条件で解析を行った。
測定サンプルとしては、別途、基板(例えば、シリコン基板、ニオブ酸リチウム基板、タンタル酸リチウム基板)に、同条件で酸化ケイ素層を成膜したものを用いた。
得られた解析モデルにおいて、基板、改質層、酸化ケイ素層の3つに区分して解析を行い、酸化ケイ素層の密度を求めた。なお、酸化ケイ素層の厚みが厚い場合や、改質層の厚みの解析が困難な場合は、解析モデルを基板、酸化ケイ素層の2つに区分し、測定プロファイルの臨界角から酸化ケイ素層の密度を求めた。
3.Q値の測定
複合基板の圧電層表面に櫛型電極を形成して得られた弾性表面波素子について、ネットワークアナライザーを用いて周波数特性を測定した。得られた周波数特性から共振周波数frおよびその半値幅Δfrを求め、fr/ΔfrによりQ値を算出した。
4.耐久性
各実施例および比較例について、LT基板の裏面の研削および研磨前後において顕微鏡観察を行い、複合基板に剥がれが生じているか否かを確認することにより、耐久性を評価した。
実施例2と同条件で測定用サンプル(LT基板に酸化ケイ素層を成膜したもの)を作製し、その改質層の組成に関し、原子分解能分析電子顕微鏡(JEOL製、JEM-ARM200F Dual-X)およびエネルギー分散型X線分析装置(JEOL製、JED-2300)を用い、加速電圧200kV、beam spot size約0.2nmΦとして、STEM-EDX観察にて分析を行った。具体的には、改質層の厚み方向でライン分析を行い、分析箇所は、改質層の厚み方向中央から第一酸化ケイ素層側およびLT基板側にそれぞれ改質層の厚みの25%の厚みの範囲内とし、厚み方向約0.2nm間隔で測定した結果の平均値を算出した。その結果、Ta、O、SiおよびArの合計を100atom%としたときのSiの含有量は、7.0atom%以下であった。
14 改質層
20 反射層
21 低インピーダンス層
22 高インピーダンス層
23 低インピーダンス層
24 高インピーダンス層
25 低インピーダンス層
26 高インピーダンス層
27 低インピーダンス層
28 高インピーダンス層
30 支持基板
40 接合層
100 複合基板
110 複合基板
Claims (15)
- 圧電層と、
前記圧電層の裏面側に配置され、酸化ケイ素を含む低インピーダンス層および高インピーダンス層を含む反射層と、を有し、
前記圧電層の裏面側の端部に改質層が形成され、
前記低インピーダンス層の密度は2.15g/cm3以上である、
複合基板。 - 前記改質層の厚みが0.3nm以上である、請求項1に記載の複合基板。
- 前記改質層の厚みが4.5nm以下である、請求項1または2に記載の複合基板。
- 前記改質層が非晶質体を含む、請求項1から3のいずれかに記載の複合基板。
- 前記改質層のケイ素原子の含有量が10atom%未満である、請求項1から4のいずれかに記載の複合基板。
- 前記高インピーダンス層が、酸化ハフニウム、酸化タンタル、酸化ジルコニウムおよび酸化アルミニウムからなる群から選択される少なくとも1つを含む、請求項1から5のいずれかに記載の複合基板。
- 前記高インピーダンス層および前記低インピーダンス層の厚みが、それぞれ0.01μm~1μmである、請求項1から6のいずれかに記載の複合基板。
- 前記反射層において、前記高インピーダンス層と前記低インピーダンス層とが交互に積層されている、請求項1から7のいずれかに記載の複合基板。
- 前記反射層の裏面側に配置される支持基板を有する、請求項1から8のいずれかに記載の複合基板。
- 前記反射層と前記支持基板との間に配置される接合層を有する、請求項9に記載の複合基板。
- 請求項1から10のいずれかに記載の複合基板を含む、弾性表面波素子。
- 互いに対向する第一主面および第二主面を有する圧電基板の前記第一主面側の端部に改質層を形成すること、
前記圧電基板の第一主面側に、酸化ケイ素を含み、密度が2.15g/cm3以上の低インピーダンス層を成膜すること、および、
前記低インピーダンス層が成膜された前記圧電基板の第一主面側に高インピーダンス層を成膜すること、
を含む、複合基板の製造方法。 - 前記改質層の厚みが0.3nm以上である、請求項12に記載の製造方法。
- 前記改質層の厚みが4.5nm以下である、請求項12または13に記載の製造方法。
- 前記低インピーダンス層および前記高インピーダンス層が成膜された前記圧電基板の第二主面側の表面を研磨することをさらに含む、請求項12から14のいずれかに記載の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180089364.XA CN116806412A (zh) | 2021-02-05 | 2021-12-24 | 复合基板、弹性表面波元件以及复合基板的制造方法 |
KR1020237025313A KR20230124709A (ko) | 2021-02-05 | 2021-12-24 | 복합 기판, 탄성 표면파 소자 및 복합 기판의 제조방법 |
DE112021006234.4T DE112021006234T5 (de) | 2021-02-05 | 2021-12-24 | Verbundsubstrat, akustisches Oberflächenwellenelement und Verfahren zur Herstellung eines Verbundsubstrats |
JP2022579385A JPWO2022168498A1 (ja) | 2021-02-05 | 2021-12-24 | |
US18/361,954 US20230378933A1 (en) | 2021-02-05 | 2023-07-31 | Composite substrate, surface acoustic wave element, and method of producing composite substrate |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021017394 | 2021-02-05 | ||
JP2021-017394 | 2021-02-05 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/361,954 Continuation US20230378933A1 (en) | 2021-02-05 | 2023-07-31 | Composite substrate, surface acoustic wave element, and method of producing composite substrate |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022168498A1 true WO2022168498A1 (ja) | 2022-08-11 |
Family
ID=82740698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/048175 WO2022168498A1 (ja) | 2021-02-05 | 2021-12-24 | 複合基板、弾性表面波素子および複合基板の製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20230378933A1 (ja) |
JP (1) | JPWO2022168498A1 (ja) |
KR (1) | KR20230124709A (ja) |
CN (1) | CN116806412A (ja) |
DE (1) | DE112021006234T5 (ja) |
TW (1) | TWI821862B (ja) |
WO (1) | WO2022168498A1 (ja) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09199978A (ja) * | 1996-01-04 | 1997-07-31 | Rockwell Internatl Corp | 薄膜音響共振子用共振音響アイソレータ |
JP2005110230A (ja) * | 2003-09-12 | 2005-04-21 | Matsushita Electric Ind Co Ltd | 薄膜バルク音響共振器、その製造方法、フィルタ、複合電子部品および通信機器 |
JP2008178071A (ja) * | 2006-12-18 | 2008-07-31 | Epson Toyocom Corp | 圧電振動子の製造方法 |
WO2012086441A1 (ja) * | 2010-12-24 | 2012-06-28 | 株式会社村田製作所 | 弾性波装置及びその製造方法 |
JP2017139720A (ja) * | 2016-02-02 | 2017-08-10 | 信越化学工業株式会社 | 複合基板および複合基板の製造方法 |
WO2017188342A1 (ja) * | 2016-04-27 | 2017-11-02 | 京セラ株式会社 | 弾性波素子および通信装置 |
JP2018074430A (ja) * | 2016-10-31 | 2018-05-10 | 太陽誘電株式会社 | 弾性波デバイスの製造方法及びウエハの製造方法 |
WO2018154950A1 (ja) * | 2017-02-21 | 2018-08-30 | 株式会社村田製作所 | 弾性波装置、高周波フロントエンド回路及び通信装置 |
JP2020113954A (ja) * | 2019-01-16 | 2020-07-27 | 株式会社村田製作所 | 弾性波装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014086400A (ja) | 2012-10-26 | 2014-05-12 | Mitsubishi Heavy Ind Ltd | 高速原子ビーム源およびそれを用いた常温接合装置 |
JP7279432B2 (ja) | 2019-03-15 | 2023-05-23 | 日本電気硝子株式会社 | 複合基板、電子デバイス、複合基板の製造方法及び電子デバイスの製造方法 |
CN110224680A (zh) * | 2019-05-13 | 2019-09-10 | 电子科技大学 | 一种固态反射型体声波谐振器及其制备方法 |
-
2021
- 2021-12-24 JP JP2022579385A patent/JPWO2022168498A1/ja active Pending
- 2021-12-24 WO PCT/JP2021/048175 patent/WO2022168498A1/ja active Application Filing
- 2021-12-24 CN CN202180089364.XA patent/CN116806412A/zh active Pending
- 2021-12-24 DE DE112021006234.4T patent/DE112021006234T5/de active Pending
- 2021-12-24 KR KR1020237025313A patent/KR20230124709A/ko unknown
-
2022
- 2022-01-13 TW TW111101378A patent/TWI821862B/zh active
-
2023
- 2023-07-31 US US18/361,954 patent/US20230378933A1/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09199978A (ja) * | 1996-01-04 | 1997-07-31 | Rockwell Internatl Corp | 薄膜音響共振子用共振音響アイソレータ |
JP2005110230A (ja) * | 2003-09-12 | 2005-04-21 | Matsushita Electric Ind Co Ltd | 薄膜バルク音響共振器、その製造方法、フィルタ、複合電子部品および通信機器 |
JP2008178071A (ja) * | 2006-12-18 | 2008-07-31 | Epson Toyocom Corp | 圧電振動子の製造方法 |
WO2012086441A1 (ja) * | 2010-12-24 | 2012-06-28 | 株式会社村田製作所 | 弾性波装置及びその製造方法 |
JP2017139720A (ja) * | 2016-02-02 | 2017-08-10 | 信越化学工業株式会社 | 複合基板および複合基板の製造方法 |
WO2017188342A1 (ja) * | 2016-04-27 | 2017-11-02 | 京セラ株式会社 | 弾性波素子および通信装置 |
JP2018074430A (ja) * | 2016-10-31 | 2018-05-10 | 太陽誘電株式会社 | 弾性波デバイスの製造方法及びウエハの製造方法 |
WO2018154950A1 (ja) * | 2017-02-21 | 2018-08-30 | 株式会社村田製作所 | 弾性波装置、高周波フロントエンド回路及び通信装置 |
JP2020113954A (ja) * | 2019-01-16 | 2020-07-27 | 株式会社村田製作所 | 弾性波装置 |
Also Published As
Publication number | Publication date |
---|---|
TW202234965A (zh) | 2022-09-01 |
DE112021006234T5 (de) | 2023-10-05 |
CN116806412A (zh) | 2023-09-26 |
JPWO2022168498A1 (ja) | 2022-08-11 |
US20230378933A1 (en) | 2023-11-23 |
KR20230124709A (ko) | 2023-08-25 |
TWI821862B (zh) | 2023-11-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101972728B1 (ko) | 접합체 및 탄성파 소자 | |
TWI692463B (zh) | 接合體及彈性波元件 | |
TWI752264B (zh) | 彈性波元件及其製造方法 | |
TWI829762B (zh) | 接合體及彈性波元件 | |
US11888462B2 (en) | Bonded body and acoustic wave element | |
KR20200096987A (ko) | 압전성 재료 기판과 지지 기판의 접합체 | |
TWI762782B (zh) | 接合體及彈性波元件 | |
US20220149811A1 (en) | Bonded body and acoustic wave element | |
JP6644208B1 (ja) | 接合体および弾性波素子 | |
WO2022168498A1 (ja) | 複合基板、弾性表面波素子および複合基板の製造方法 | |
JP7455205B2 (ja) | 複合基板および複合基板の製造方法 | |
US20220103156A1 (en) | Composite substrate, elastic wave element, and production method for composite substrate | |
TWI699015B (zh) | 接合體及彈性波元件 | |
TWI743700B (zh) | 4g頻帶用彈性表面波元件 | |
JP6935573B1 (ja) | 複合基板および弾性表面波素子 | |
WO2023189103A1 (ja) | 複合基板、弾性表面波素子および複合基板の製造方法 | |
WO2021002046A1 (ja) | 接合体および弾性波素子 | |
WO2022259591A1 (ja) | 複合基板および複合基板の製造方法 | |
KR102670208B1 (ko) | 접합체 및 탄성파 소자 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21924883 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022579385 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180089364.X Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 20237025313 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112021006234 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21924883 Country of ref document: EP Kind code of ref document: A1 |