# US 12,016,124 B2 · Coating for electrical components of surgical devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,124 B2 - Document ID: US12016124B2 - Status: Granted - Kind: B2 - Application number: 17/190,511 - Filed: 2021-03-03 - Published: 2021-10-28 - Granted: 2024-06-18 - Earliest claimed: 2020-04-27 - Assignees: Covidien LP - Applicants: Covidien LP - Inventors: David N. Fowler - Web page: https://patentgrep.com/patent/US12016124B2 ## CPC - H05K 1/181: associated with surface mounted components - A61B 17/07207: {the staples being applied sequentially} - H05K 3/282: {for inhibiting the corrosion of the circuit, e.g. for preserving the solderability} - A61B 2017/00017: {Electrical control of surgical instruments} - A61B 2017/0046: {with a releasable handle; with handle and operating part separable} - A61B 2017/00473: {Distal part, e.g. tip or head (A61B2017/00464 takes precedence)} - A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)} - A61B 2017/00486: {Adaptors for coupling parts with incompatible geometries} - A61B 2017/00831: {Material properties} - A61B 2090/0813: {Accessories designed for easy sterilising, i.e. re-usable} - H05K 3/284: {for encapsulating mounted components (H05K1/185 takes precedence)} - H05K 3/285: {Permanent coating compositions} - H05K 2201/0162: Silicon containing polymer, e.g. silicone - H05K 2201/0191: wherein the thickness of the dielectric plays an important role - H05K 2201/0195: Dielectric or adhesive layers comprising a plurality of layers, e.g. in a multilayer structure - H05K 2201/09872: Insulating conformal coating - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Surgical devices include adapter assemblies which electrically and mechanically interconnect handles of electromechanical surgical devices to surgical loading units. Electrical components of the surgical devices are coated with a multi-layer conformal coating which permits the devices to be sterilized in an autoclave without damaging the electrical components. ## Claims ### Claim 1 A hand-held electromechanical surgical device comprising: a housing; a loading unit; and an adapter assembly connecting the housing and the loading unit, the adapter assembly including an electrical assembly coated with a multi-layer conformal coating having at least one inner layer formed of a first material having a first viscosity and at least one outer layer formed of a second material having a second viscosity higher than the first viscosity, wherein the multi-layer conformal coating has a thickness from about 350 μm to about 700 μm. ### Claim 2 (depends on 1) The hand-held electromechanical surgical device according to claim 1, wherein the electrical assembly is a printed circuit board. ### Claim 3 (depends on 2) The hand-held electromechanical surgical device according to claim 2, wherein the printed circuit board includes a substrate, a plurality of conductive tracks on at least one surface of the substrate, and at least one electrical component connected to at least one conductive track. ### Claim 4 (depends on 3) The hand-held electromechanical surgical device according to claim 3, wherein the electrical component is a resistor, capacitor, transistor, diode, amplifier, relay, transformer, battery, fuse, integrated circuit, switch, LED, LED display, Piezo element, optoelectrical component, antenna, oscillator, or combinations thereof. ### Claim 5 (depends on 3) The hand-held electromechanical surgical device according to claim 3, wherein the multi-layer conformal coating covers the plurality of conductive tracks, the at least one electrical component, and the surface of the substrate on which the plurality of conductive tracks and the at least one electrical component are located. ### Claim 6 (depends on 1) The hand-held electromechanical surgical device according to claim 1, wherein the first material is a silicone having a first viscosity from about 195 cps to about 400 cps. ### Claim 7 (depends on 1) The hand-held electromechanical surgical device according to claim 1, wherein the inner layer has a thickness from about 50 μm to about 200 μm. ### Claim 8 (depends on 1) The hand-held electromechanical surgical device according to claim 1, wherein the second material is a room temperature vulcanizing silicone having a second viscosity from about 3000 cps to about 10000 cps. ### Claim 9 (depends on 1) The hand-held electromechanical surgical device according to claim 1, wherein the outer layer has a thickness from about 300 μm to about 500 μm. ### Claim 10 A hand-held electromechanical surgical device comprising: a housing; a loading unit; an adapter assembly connecting the housing and the loading unit, the adapter assembly including an electrical assembly, the electrical assembly including a printed circuit board including a substrate, a plurality of conductive tracks on at least one surface of the substrate, and at least one electrical component connected to at least one conductive track; and a multi-layer conformal coating covering the plurality of conductive tracks, the at least one electrical component, and the surface of the substrate on which the plurality of conductive tracks and the at least one electrical component are located, wherein the multi-layer conformal coating has a thickness from about 350 μm to about 700 μm. ### Claim 11 (depends on 10) The hand-held electromechanical surgical device according to claim 10, wherein the electrical component is a resistor, capacitor, transistor, diode, amplifier, relay, transformer, battery, fuse, integrated circuit, switch, LED, LED display, Piezo element, optoelectrical component, antenna, oscillator, or combinations thereof. ### Claim 12 (depends on 10) The hand-held electromechanical surgical device according to claim 10, wherein the multi-layer conformal coating has at least one inner layer formed of a first material including a silicone having a viscosity from about 195 cps to about 400 cps, and at least one outer layer formed of a second material including a room temperature vulcanizing silicone having a viscosity from about 3000 cps to about 10000 cps. ### Claim 13 (depends on 12) The hand-held electromechanical surgical device according to claim 12, wherein the inner layer has a thickness from about 50 μm to about 200 μm, and the outer layer has a thickness from about 300 μm to about 500 μm. ### Claim 14 An adapter assembly for connecting a surgical loading unit configured to perform a function with a handle of a surgical device that is configured to actuate the loading unit, the adapter assembly comprising: an electrical assembly including a printed circuit board, the printed circuit board including a substrate, a plurality of conductive tracks on at least one surface of the substrate, and at least one electrical component connected to at least one conductive track; and a multi-layer conformal coating covering the plurality of conductive tracks, the at least one electrical component, and the surface of the substrate on which the plurality of conductive tracks and the at least one electrical component are located, wherein the multi-layer conformal coating has a thickness from about 350 μm to about 700 μm. ### Claim 15 (depends on 14) The adapter assembly according to claim 14, wherein the electrical component is a resistor, capacitor, transistor, diode, amplifier, relay, transformer, battery, fuse, integrated circuit, switch, LED, LED display, Piezo element, optoelectrical component, antenna, oscillator, or combinations thereof. ### Claim 16 (depends on 14) The adapter assembly according to claim 14, wherein the multi-layer conformal coating has at least one inner layer formed of a first material having a first viscosity and at least one outer layer formed of a second material having a second viscosity higher than the first viscosity. ### Claim 17 (depends on 16) The adapter assembly according to claim 16, wherein the first material is a silicone having a viscosity from about 195 cps to about 400 cps. ### Claim 18 (depends on 16) The adapter assembly according to claim 16, wherein the inner layer has a thickness from about 50 μm to about 200 μm. ### Claim 19 (depends on 16) The adapter assembly according to claim 16, wherein the second material is a room temperature vulcanizing silicone having a viscosity from about 3000 cps to about 10000 cps. ### Claim 20 (depends on 16) The adapter assembly according to claim 16, wherein the outer layer has a thickness from about 300 μm to about 500 μm.