# US 10,204,840 B2 · Method for measuring gas dissociation degrees > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,204,840 B2 - Document ID: US10204840B2 - Status: Granted - Kind: B2 - Application number: 15/606,809 - Filed: 2017-05-26 - Published: 2018-07-05 - Granted: 2019-02-12 - Earliest claimed: 2017-01-05 - Assignees: FairTech Corporation - Applicants: Jui-Pao Pan - Inventors: Jui-Pao Pan - Web page: https://patentgrep.com/patent/US10204840B2 ## CPC - H10P 74/238: {comprising acting in response to an ongoing measurement without interruption of processing, e.g. endpoint detection or in-situ thickness measurement} - G01N 21/85: Investigating moving fluids or granular solids - H01J 37/32972: {Spectral analysis} - G01N 21/94: Investigating contamination, e.g. dust (G01N21/85 takes precedence) - G01N 2021/8416: {and process controlling, not otherwise provided for} - G01N 2021/8578: {Gaseous flow} - H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10 - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) ## Abstract A method for measuring gas dissociation degrees is provided. The method comprises the following steps. A reaction process with at least one reactive gas in a main path and a second path connecting to the main path is performed. A plasma gas dissociation degree of the reactive gas in the reaction process is detected. A dissociation quantity value of the reactive gas in the reaction process is calculated. An amount of the reactive gas in the main path after the reaction process is provided. The reactive gas is discharged according to the dissociation quantity value of the reactive gas for removing contaminants in the main path. ## Claims ### Claim 1 A device for measuring gas dissociation degrees, comprising: a main path for performing processes of plasma-assisted deposition, membrane etching and material surface modification to achieve special functions and effects in semiconductor integrated circuit manufacturing; a second path connected to the main path for storing reactive gas; a detecting element and an optical spectrum plasma gas dissociation measuring device disposed between the main path and the second path, wherein the detecting element detects a gas dissociation degree and the optical spectrum plasma gas dissociation measuring device calculates a relative dissociation quantity value. ### Claim 2 (depends on 1) A device for measuring gas dissociation degrees with an optical spectrometer of claim 1, wherein the main path and the second path are connected with a tube body and the detecting element and optical spectrum plasma gas dissociation measuring device are disposed at appropriate locations in the tube body. ### Claim 3 (depends on 1) A device for measuring gas dissociation degrees with an optical spectrometer of claim 1, wherein the detecting element and optical spectrum plasma gas dissociation measuring device are disposed at appropriate locations in the main path. ### Claim 4 (depends on 1) A device for measuring gas dissociation degrees with an optical spectrometer of claim 1, wherein the detecting element and optical spectrum plasma gas dissociation measuring device are disposed at appropriate locations in the second path. ### Claim 5 (depends on 1) A device for measuring gas dissociation degrees with an optical spectrometer of claim 1, wherein the detecting element and optical spectrum plasma gas dissociation measuring device are disposed at appropriate locations in the fluid path. ### Claim 6 (depends on 1) A device for measuring gas dissociation degrees with an optical spectrometer of claim 1, wherein the detecting element and optical spectrum plasma gas dissociation measuring device may be applied in a device in a plasma source device, a plasma gas chamber or an electrical control system. ### Claim 7 (depends on 1) A device for measuring gas dissociation degrees with an optical spectrometer of claim 1, wherein the processes comprise processes in a physical vapor deposition device, chemical vapor deposition device, etching device and in the semiconductor, photoelectric, panel industries, a remote plasma source device, and inspection examination device in the biotechnology, chemistry, applied physics industries, and inspection apparatus or testing platform in the equipment maintenance industry for the foregoing industries. ### Claim 8 A method for measuring gas dissociation degrees, comprising: performing a reaction process with at least one reactive gas in a main path and a second path connecting to the main path for storing the reactive gas; detecting a plasma gas dissociation degree of the reactive gas in the reaction process; calculating a dissociation quantity value of the reactive gas in the reaction process; providing an amount of the reactive gas in the main path after the reaction process according to the dissociation quantity value of the reactive gas; and discharging the reactive gas for removing contaminants in the main path. ### Claim 9 (depends on 8) The method of claim 8, wherein the reaction process comprises physical vapor deposition, chemical vapor deposition, and etching processes. ### Claim 10 (depends on 8) The method of claim 8, wherein the plasma gas dissociation degree of the reactive gas is detected by a detecting element and the dissociation quantity value of the reactive gas is calculated by an optical spectrum plasma gas dissociation measuring device. ### Claim 11 (depends on 10) The method of claim 10, wherein the detecting element and the optical spectrum plasma gas dissociation measuring device are disposed at the main path. ### Claim 12 (depends on 10) The method of claim 10, wherein the detecting element and the optical spectrum plasma gas dissociation measuring device are disposed at the second path. ### Claim 13 (depends on 8) The method of claim 8 further comprising a step of vacuum discharge after the step of discharging the reactive gas by a vacuum pump and a gas purifier connecting to the main path. ### Claim 14 (depends on 13) The method of claim 13, wherein the detecting element and the optical spectrum plasma gas dissociation measuring device are disposed between the main path and the vacuum pump.