# US 10,122,464 B2 · Optical module and optical transmission device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,464 B2 - Document ID: US10122464B2 - Status: Granted - Kind: B2 - Application number: 15/252,447 - Filed: 2016-08-31 - Published: 2017-04-13 - Granted: 2018-11-06 - Earliest claimed: 2015-10-09 - Assignees: Fujitsu Optical Components Limited - Applicants: Fujitsu Optical Components Limited - Inventors: Masaki Sugiyama - Web page: https://patentgrep.com/patent/US10122464B2 ## CPC - H04B 10/501: {Structural aspects} - H04B 10/516: Details of coding or modulation - H05K 1/0228: {Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors (balanced signal pairs H05K1/0245)} - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - H05K 3/363: {by soldering} - H05K 1/0221: {Coaxially shielded signal lines comprising a continuous shielding layer partially or wholly surrounding the signal lines} - H05K 1/0245: {Lay-out of balanced signal pairs, e.g. differential lines or twisted lines} - H05K 1/0281: {Reinforcement details thereof} - H04B: TRANSMISSION - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An optical module includes a substrate, a package, and a flexible substrate. The substrate is provided with an electrode. The package includes a housing fixed to the substrate, a receiving unit that optically demodulates a received optical signal to convert the optical signal into a reception electrical signal, an output terminal that is provided on a surface of the housing and outputs the reception electrical signal, an input terminal that is provided at a height from the substrate different from a height of the output terminal and receives a transmission electrical signal, and a transmitting unit that optically modulates the transmission electrical signal received from the input terminal and transmits an optical signal resulting from optical modulation. A flexible substrate has flexibility and includes a signal electrode that connects one of the output terminal and the input terminal to the electrode arranged on the substrate. ## Claims ### Claim 1 An optical module comprising: a substrate on which an electrode is arranged; a package including: a housing fixed to the substrate; a receiving unit that optically demodulates a received optical signal to convert the optical signal into a reception electrical signal; a plurality of output terminals that are provided on a surface of the housing and that output the reception electrical signal obtained by the receiving unit; an input terminal that is provided at a height from the substrate different from a height of the output terminals and at a position overlapping with an arrangement range of the output terminals in a direction parallel to a surface of the substrate, and that receives a transmission electrical signal; and a transmitting unit that optically modulates the transmission electrical signal received from the input terminal and transmits an optical signal resulting from optical modulation; and a flexible substrate having flexibility and including a signal electrode that connects a first terminal of the output terminals and the input terminal to the electrode arranged on the substrate. ### Claim 2 (depends on 1) The optical module according to claim 1, wherein the first terminal is soldered to the signal electrode of the flexible substrate, and a second terminal of the output terminals and the input terminal is soldered to the electrode arranged on the substrate. ### Claim 3 (depends on 2) The optical module according to claim 2, wherein the flexible substrate includes a signal electrode soldered to the electrode arranged on the substrate at a position farther from the package than a position at which the second terminal is soldered. ### Claim 4 (depends on 1) The optical module according to claim 1, wherein the substrate includes: a first electrode electrically connected to a first terminal of the output terminals and the input terminal via the flexible substrate and arranged on a surface layer; and a second electrode electrically connected to a second terminal of the output terminals and the input terminal and arranged in an inner layer. ### Claim 5 (depends on 1) The optical module according to claim 1, wherein the package further includes a plurality of ground terminals having a ground voltage at positions sandwiching each of the output terminals and the input terminal, and the flexible substrate further includes a plurality of ground electrodes connected to the ground terminals on a surface opposite to a surface provided with the signal electrode. ### Claim 6 (depends on 5) The optical module according to claim 5, wherein the package includes a plurality of ground terminals having a larger diameter than a diameter of a first terminal of the output terminals and the input terminal at positions sandwiching the first terminal. ### Claim 7 (depends on 5) The optical module according to claim 5, wherein the package includes a larger number of ground terminals than a total number of a first terminal of the output terminals and the input terminal at positions sandwiching the first terminal. ### Claim 8 (depends on 5) The optical module according to claim 5, wherein the flexible substrate includes the signal electrode on a surface farther from the package and the ground electrode on a surface closer to the package. ### Claim 9 (depends on 5) The optical module according to claim 5, wherein the flexible substrate further includes a coverlay that covers the ground electrode. ### Claim 10 An optical transmission device comprising: an optical transmission member that transmits an optical signal; a substrate on which an electrode is arranged; a package including: a housing fixed to the substrate; a receiving unit that optically demodulates the optical signal received from the optical transmission member to convert the optical signal into a reception electrical signal; a plurality of output terminals that are provided on a surface of the housing and that output the reception electrical signal obtained by the receiving unit; an input terminal that is provided at a height from the substrate different from a height of the output terminals and at a position overlapping with an arrangement range of the output terminals in a direction parallel to a surface of the substrate, and that receives a transmission electrical signal; and a transmitting unit that optically modulates the transmission electrical signal received from the input terminal and transmits an optical signal resulting from optical modulation to the optical transmission member; and a flexible substrate having flexibility and including a signal electrode that connects a first terminal of the output terminals and the input terminal to the electrode arranged on the substrate. ### Claim 11 (depends on 10) The optical transmission device according to claim 10, wherein the optical transmission member is connected to a surface of the housing of the package opposite to the surface provided with the output terminals. ### Claim 12 (depends on 10) The optical transmission device according to claim 10, wherein the optical transmission member is connected to the surface of the housing of the package provided with the output terminals.