# US 12,113,513 B2 · Filter and multi-filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,513 B2 - Document ID: US12113513B2 - Status: Granted - Kind: B2 - Application number: 17/434,094 - Filed: 2020-02-18 - Published: 2022-05-05 - Granted: 2024-10-08 - Earliest claimed: 2019-02-26 - Assignees: KYOCERA Corporation - Applicants: KYOCERA Corporation - Inventors: Tomonori Urata - Web page: https://patentgrep.com/patent/US12113513B2 ## CPC - H03H 9/02574: {of combined substrates, multilayered substrates, piezoelectrical layers on not-piezoelectrical substrate} - H03H 9/568: {consisting of a ladder configuration} - H03H 9/02559: {of lithium niobate or lithium-tantalate substrates} - H03H 9/13: for networks consisting of piezoelectric or electrostrictive materials (for networks using surface acoustic waves H03H9/145) - H03H 9/17: having a single resonator (crystal tuning forks H03H9/21) - H03H 9/6436: {having one acoustic track only} - H03H 9/6483: {Ladder SAW filters} - H03H 9/725: {Duplexers} - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) ## Abstract A filter includes a ladder filter portion formed on a first piezoelectric substrate; and a multi-mode filter portion connected to the ladder filter portion and formed on a second piezoelectric substrate different from the first piezoelectric substrate. The ladder filter portion and the multi-mode filter portion constitute a single passband. ## Claims ### Claim 1 A filter comprising: a ladder filter portion formed on a first piezoelectric substrate; and a multi-mode filter portion connected to the ladder filter portion and formed on a second piezoelectric substrate different from the first piezoelectric substrate, wherein the ladder filter portion and the multi-mode filter portion constitute a single passband, and wherein an electrode thickness of the ladder filter portion is different from an electrode thickness of the multi-mode filter portion. ### Claim 2 (depends on 1) The filter according to claim 1, wherein a cut-angle of the first piezoelectric substrate is different from a cut-angle of the second piezoelectric substrate. ### Claim 3 (depends on 1) The filter according to claim 1, wherein a thickness of the first piezoelectric substrate is different from a thickness of the second piezoelectric substrate. ### Claim 4 (depends on 3) The filter according to claim 3, wherein the ladder filter portion comprises a plurality of resonators connected in a ladder form, wherein the resonators each include an IDT electrode having a plurality of electrode fingers arranged at a pitch p, and wherein the thickness of the first piezoelectric substrate is less than or equal to 2p. ### Claim 5 (depends on 1) The filter according to claim 1, wherein an end of the ladder filter portion is connected to an antenna terminal, the ladder filter portion comprises resonators in each of which a plurality of electrode fingers are repetitively arranged, the first piezoelectric substrate for the ladder filter portion has a thickness that is less than or equal to twice a pitch at which the electrode fingers are repetitively arranged, and the ladder filter portion further comprises a support substrate directly or indirectly connected to the first piezoelectric substrate. ### Claim 6 (depends on 1) A multi-filter comprising: a first filter as which the filter according to claim 1 is used; a second filter; and a third filter, wherein a center frequency of a passband of the first filter takes a value between center frequencies of the second filter and the third filter, and wherein the first substrate or the second substrate is shared with the second filter or the third filter. ### Claim 7 (depends on 6) The multi-filter according to claim 6, wherein the second filter is a ladder filter and shares the first substrate. ### Claim 8 (depends on 6) The multi-filter according to claim 6, wherein the third filter comprises a multi-mode filter and shares the second substrate. ### Claim 9 A filter comprising: a ladder filter portion formed on a first piezoelectric substrate; and a multi-mode filter portion connected to the ladder filter portion and formed on a second piezoelectric substrate different from the first piezoelectric substrate, wherein the ladder filter portion and the multi-mode filter portion constitute a single passband, and wherein a cut-angle of the first piezoelectric substrate is different from a cut-angle of the second piezoelectric substrate. ### Claim 10 (depends on 9) The filter according to claim 9, wherein a thickness of the first piezoelectric substrate is different from a thickness of the second piezoelectric substrate. ### Claim 11 (depends on 9) The filter according to claim 9, wherein an end of the ladder filter portion is connected to an antenna terminal, the ladder filter portion comprises resonators in each of which a plurality of electrode fingers are repetitively arranged, the first piezoelectric substrate for the ladder filter portion has a thickness that is less than or equal to twice a pitch at which the electrode fingers are repetitively arranged, and the ladder filter portion further comprises a support substrate directly or indirectly connected to the first piezoelectric substrate. ### Claim 12 (depends on 9) A multi-filter comprising: a first filter as which the filter according to claim 9 is used; a second filter; and a third filter, wherein a center frequency of a passband of the first filter takes a value between center frequencies of the second filter and the third filter, and wherein the first substrate or the second substrate is shared with the second filter or the third filter. ### Claim 13 (depends on 12) The multi-filter according to claim 12, wherein the second filter is a ladder filter and shares the first substrate. ### Claim 14 (depends on 12) The multi-filter according to claim 12, wherein the third filter comprises a multi-mode filter and shares the second substrate. ### Claim 15 A filter comprising: a ladder filter portion formed on a first piezoelectric substrate; and a multi-mode filter portion connected to the ladder filter portion and formed on a second piezoelectric substrate different from the first piezoelectric substrate, wherein the ladder filter portion and the multi-mode filter portion constitute a single passband, and wherein a thickness of the first piezoelectric substrate is different from a thickness of the second piezoelectric substrate. ### Claim 16 (depends on 15) The filter according to claim 15, wherein the ladder filter portion comprises a plurality of resonators connected in a ladder form, wherein the resonators each include an IDT electrode having a plurality of electrode fingers arranged at a pitch p, and wherein the thickness of the first piezoelectric substrate is less than or equal to 2p. ### Claim 17 (depends on 15) The filter according to claim 15, wherein an end of the ladder filter portion is connected to an antenna terminal, the ladder filter portion comprises resonators in each of which a plurality of electrode fingers are repetitively arranged, the first piezoelectric substrate for the ladder filter portion has a thickness that is less than or equal to twice a pitch at which the electrode fingers are repetitively arranged, and the ladder filter portion further comprises a support substrate directly or indirectly connected to the first piezoelectric substrate. ### Claim 18 (depends on 15) A multi-filter comprising: a first filter as which the filter according to claim 15 is used; a second filter; and a third filter, wherein a center frequency of a passband of the first filter takes a value between center frequencies of the second filter and the third filter, and wherein the first substrate or the second substrate is shared with the second filter or the third filter. ### Claim 19 (depends on 18) The multi-filter according to claim 18, wherein the second filter is a ladder filter and shares the first substrate. ### Claim 20 (depends on 18) The multi-filter according to claim 18, wherein the third filter comprises a multi-mode filter and shares the second substrate.