# US 12,191,553 B2 · Transmission line > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,553 B2 - Document ID: US12191553B2 - Status: Granted - Kind: B2 - Application number: 17/983,444 - Filed: 2022-11-09 - Published: 2023-03-02 - Granted: 2025-01-07 - Earliest claimed: 2020-05-15 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Kenji Matsuda; Takuya Hashimoto - Web page: https://patentgrep.com/patent/US12191553B2 ## CPC - H01P 3/08: Microstrips; Strip lines - H05K 1/0296: {Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 (H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18)} - H01P 3/026: {Coplanar striplines [CPS]} - H01Q 1/48: Earthing means; Earth screens; Counterpoises - H05K 1/0216: {Reduction of cross-talk, noise or electromagnetic interference (grounding H05K1/0215)} - H01P 3/00: Waveguides; Transmission lines of the waveguide type - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - H05K 2201/09281: Layout details of a single conductor - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A transmission line includes a substrate including insulator layers, a mounting electrode on a front layer of the substrate, a signal conductor, a first ground conductor, a first connecting electrode that electrically connects the mounting electrode and the signal conductor and is between the signal conductor and the first ground conductor in a laminating direction, a first inter-layer connecting conductor that is electrically connected between the mounting electrode and the first connecting electrode and is bonded to the first connecting electrode, and a second inter-layer connecting conductor that is electrically connected between the signal conductor and the first connecting electrode, is bonded to the first connecting electrode, and does not overlap with the first inter-layer connecting conductor when viewed in the laminating direction. The first ground conductor does not overlap with at least a portion of the first connecting electrode when viewed in the laminating direction. ## Claims ### Claim 1 A transmission line comprising: a substrate including a plurality of insulator layers; a mounting electrode on a front layer of the substrate; a signal conductor in the substrate; a first ground conductor that is provided on the substrate and overlaps with the signal conductor when viewed in a laminating direction of the plurality of insulator layers; a first connecting electrode that electrically connects the mounting electrode and the signal conductor with each other and is between the signal conductor and the first ground conductor in the laminating direction; a first inter-layer connecting conductor that is electrically connected between the mounting electrode and the first connecting electrode and is bonded to the first connecting electrode; and a second inter-layer connecting conductor that is electrically connected between the signal conductor and the first connecting electrode, is bonded to the first connecting electrode, and does not overlap with the first inter-layer connecting conductor when viewed in the laminating direction; wherein the first ground conductor does not overlap with at least a portion of the first connecting electrode when viewed in the laminating direction. ### Claim 2 (depends on 1) The transmission line according to claim 1, wherein the first ground conductor does not overlap with the first connecting electrode when viewed in the laminating direction. ### Claim 3 (depends on 2) The transmission line according to claim 2, further comprising: a second ground conductor on the substrate and overlapping with the first connecting electrode when viewed in the laminating direction; wherein the signal conductor and the first connecting electrode are between the first ground conductor and the second ground conductor in the laminating direction; a distance between the first connecting electrode and the second ground conductor in the laminating direction is greater than or equal to a distance between the first connecting electrode and the first ground conductor in the laminating direction; and a minimum width of the first connecting electrode is larger than a minimum width of the signal conductor. ### Claim 4 (depends on 2) The transmission line according to claim 2, further comprising: a second ground conductor on the substrate and overlapping with the first connecting electrode and the mounting electrode when viewed in the laminating direction; wherein the signal conductor and the first connecting electrode are between the first ground conductor and the second ground conductor and between the mounting electrode and the second ground conductor in the laminating direction; a distance between the first connecting electrode and the second ground conductor in the laminating direction is greater than or equal to a distance between the first connecting electrode and the first ground conductor in the laminating direction; and a maximum width of the first connecting electrode is smaller than a minimum width of the mounting electrode. ### Claim 5 (depends on 1) The transmission line according to claim 1, wherein the first connecting electrode includes a first portion that overlaps with the first ground conductor and a second portion that does not overlap with the first ground conductor when viewed in the laminating direction; and a minimum width of the first portion is smaller than a maximum width of the second portion. ### Claim 6 (depends on 5) The transmission line according to claim 5, wherein the minimum width of the first portion is smaller than a minimum width of the second portion. ### Claim 7 (depends on 1) The transmission line according to claim 1, wherein the first connecting electrode includes a first portion that overlaps with the first ground conductor and a second portion that does not overlap with the first ground conductor when viewed in the laminating direction; and an area of the first portion is smaller than an area of the second portion. ### Claim 8 (depends on 5) The transmission line according to claim 5, wherein a minimum width of the first connecting electrode is smaller than a minimum width of the signal conductor. ### Claim 9 (depends on 1) The transmission line according to claim 1, further comprising: a second ground conductor on the substrate and overlapping with the first connecting electrode when viewed in the laminating direction; and a second connecting electrode that electrically connects the first ground conductor and the second ground conductor with each other; wherein the signal conductor, the first connecting electrode, and the second connecting electrode are between the first ground conductor and the second ground conductor in the laminating direction; a distance between the first connecting electrode and the second ground conductor in the laminating direction is greater than or equal to a distance between the first connecting electrode and the first ground conductor in the laminating direction; and the first connecting electrode and the second connecting electrode do not overlap with each other when viewed in the laminating direction. ### Claim 10 (depends on 1) The transmission line according to claim 1, wherein the signal conductor includes a continuous conductor pattern in one of the plurality of insulator layers and has a largest area among conductor patterns that define signal lines and transmit signals. ### Claim 11 (depends on 3) The transmission line according to claim 3, wherein the signal conductor extends in a same direction that the transmission line extends, and the signal conductor is arranged between the first ground conductor and the second ground conductor to define a stripline structure. ### Claim 12 (depends on 1) The transmission line according to claim 1, wherein the first ground conductor includes at least one slit with a shape that is rectangular, circular, or arc-shaped, or includes an arc-shaped end portion. ### Claim 13 (depends on 12) The transmission line according to claim 12, wherein the mounting electrode and the first connecting electrode are located in the at least one slit. ### Claim 14 (depends on 1) The transmission line according to claim 1, wherein at least three of the plurality of insulator layers are provided between the mounting electrode and the signal conductor. ### Claim 15 (depends on 1) The transmission line according to claim 1, further comprising a third inter-layer connecting conductor that overlaps with one of the first inter-layer connecting conductor and the second inter-layer connecting conductor. ### Claim 16 (depends on 1) The transmission line according to claim 1, further comprising at least one resist film on at least one main surface of the substrate. ### Claim 17 (depends on 16) The transmission line according to claim 16, wherein the at least one resist film includes an opening to expose a portion of the mounting electrode and an opening to expose a portion of the first ground conductor. ### Claim 18 (depends on 1) The transmission line according to claim 1, wherein the first connecting electrode is closer to the ground conductor than the signal conductor in the laminating direction. ### Claim 19 (depends on 1) The transmission line according to claim 1, wherein the ground conductor extends up to immediately before the mounting electrode in an extending direction of the transmission line. ### Claim 20 (depends on 1) The transmission line according to claim 1, wherein the first inter-layer connecting conductor or the second inter-layer connecting conductor is a via hole.