Patents by Inventor Jun Yamawaku

Jun Yamawaku has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10283328
    Abstract: Disclosed is a plasma processing apparatus including a chamber configured to perform a processing on a wafer by plasma, a VF power supply configured to change a frequency of a high frequency power to be supplied into the chamber, a susceptor configured to mount the wafer thereon, and a focus ring disposed to surround the wafer. A first route, which passes through the plasma starting from the VF power supply, passes through the susceptor, the wafer and the plasma, and a second route, which passes through the plasma starting from the VF power supply, passes through the susceptor, the focus ring and the plasma. The reflection minimum frequency of the first route is different from the reflection minimum frequency of the second route, and the frequency range changeable by the VF power supply includes the reflection minimum frequencies of the first and second routes.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: May 7, 2019
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Jun Yamawaku, Chishio Koshimizu, Tatsuo Matsudo
  • Publication number: 20190115188
    Abstract: A plasma processing apparatus includes a high frequency antenna having first and second antenna elements. One end of the first antenna element is grounded and the other end thereof is connected to a high frequency power supply. One end of the second antenna element is an open end and the other end thereof is connected to either one of the one end and the other end of the first antenna element, a line length of the second antenna element having a value obtained by multiplying ((?/4)+n?/2) by a fractional shortening (? is a wavelength of high frequency in vacuum and n is a natural number). A circuit viewed from the high frequency power supply toward the high frequency antenna is configured to generate, when a frequency of a high frequency power is changed, two resonant frequencies by an adjustment of the impedance adjustment unit.
    Type: Application
    Filed: December 10, 2018
    Publication date: April 18, 2019
    Inventors: Jun YAMAWAKU, Tatsuo MATSUDO, Chishio KOSHIMIZU
  • Publication number: 20190108975
    Abstract: A plasma processing apparatus includes a high frequency antenna having first and second antenna elements. One end of the first antenna element is grounded and the other end thereof is connected to a high frequency power supply. One end of the second antenna element is an open end and the other end thereof is connected to either one of the one end and the other end of the first antenna element, a line length of the second antenna element having a value obtained by multiplying ((?/4)+n?/2) by a fractional shortening (? is a wavelength of high frequency in vacuum and n is a natural number). A circuit viewed from the high frequency power supply toward the high frequency antenna is configured to generate, when a frequency of a high frequency power is changed, two resonant frequencies by an adjustment of the impedance adjustment unit.
    Type: Application
    Filed: December 10, 2018
    Publication date: April 11, 2019
    Inventors: Jun YAMAWAKU, Tatsuo MATSUDO, Chishio KOSHIMIZU
  • Patent number: 10211031
    Abstract: Disclosed is a plasma processing method for generating plasma between an upper electrode connected with a VF power supply and a susceptor disposed to face the upper electrode to perform a plasma processing on a wafer by the plasma. The plasma processing method includes: providing an auxiliary circuit configured to reduce a difference between a reflection minimum frequency of a first route where a high frequency current generated from the VF power supply flows before ignition of the plasma and a reflection minimum frequency of a second route where the high frequency current generated from the VF power supply flows after the ignition of the plasma; igniting the plasma; and maintaining the plasma.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: February 19, 2019
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Chishio Koshimizu, Jun Yamawaku
  • Patent number: 10115614
    Abstract: A transfer chamber is provided between a processing unit for performing a predetermined process on a target substrate to be processed in a depressurized environment and an atmospheric maintaining unit for maintaining the target substrate in an atmospheric environment to transfer the target substrate therebetween. The transfer chamber includes a chamber main body for accommodating the target substrate, a gas exhaust unit for exhausting the chamber main body to set the chamber main body to the depressurized environment, and a gas supply unit for supplying a predetermined gas to the chamber main body to set the chamber main body in the atmospheric environment. Further, in the transfer chamber, an ionization unit is provided outside the chamber main body, for ionizing the predetermined gas and an ionized gas supply unit is provided to supply the ionized gas generated by the ionization unit to the chamber main body.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: October 30, 2018
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Jun Yamawaku, Junji Oikawa, Hiroyuki Nakayama
  • Publication number: 20180308662
    Abstract: A plasma processing apparatus includes: an evacuable processing chamber including a dielectric window; a substrate supporting unit, provided in the processing chamber, for mounting thereon a target substrate; a processing gas supply unit for supplying a desired processing gas to the processing chamber to perform a plasma process on the target substrate; a first RF antenna, provided on the dielectric window, for generating a plasma by an inductive coupling in the processing chamber; and a first RF power supply unit for supplying an RF power to the first RF antenna. The first RF antenna includes a primary coil provided on or above the dielectric window and electrically connected to the first RF power supply unit; and a secondary coil provided such that the coils are coupled with each other by an electromagnetic induction therebetween while being arranged closer to a bottom surface of the dielectric window than the primary coil.
    Type: Application
    Filed: June 7, 2018
    Publication date: October 25, 2018
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Yohei YAMAZAWA, Masashi SAITO, Kazuki DENPOH, Chishio KOSHIMIZU, Jun YAMAWAKU
  • Publication number: 20180218884
    Abstract: There is provided a focus ring that is capable of preventing deposits from adhering to a member having a lower temperature in a gap between two members having different temperatures. A focus ring 25 is disposed to surround a peripheral portion of a wafer W in a chamber 11 of a substrate processing apparatus 10. The focus ring 25 includes an inner focus ring 25a and an outer focus ring 25b. Here, the inner focus ring 25a is placed adjacent to the wafer W and configured to be cooled; and the outer focus ring 25b is placed so as to surround the inner focus ring 25a and configured not to be cooled. Further, a block member 25c is provided in a gap between the inner focus ring 25a and the outer focus ring 25b.
    Type: Application
    Filed: March 26, 2018
    Publication date: August 2, 2018
    Inventors: Jun Yamawaku, Chishio Koshimizu
  • Patent number: 9997332
    Abstract: A plasma processing apparatus includes: an evacuable processing chamber including a dielectric window; a substrate supporting unit, provided in the processing chamber, for mounting thereon a target substrate; a processing gas supply unit for supplying a desired processing gas to the processing chamber to perform a plasma process on the target substrate; a first RF antenna, provided on the dielectric window, for generating a plasma by an inductive coupling in the processing chamber; and a first RF power supply unit for supplying an RF power to the first RF antenna. The first RF antenna includes a primary coil provided on or above the dielectric window and electrically connected to the first RF power supply unit; and a secondary coil provided such that the coils are coupled with each other by an electromagnetic induction therebetween while being arranged closer to a bottom surface of the dielectric window than the primary coil.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: June 12, 2018
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Yohei Yamazawa, Masashi Saito, Kazuki Denpoh, Chishio Koshimizu, Jun Yamawaku
  • Patent number: 9941097
    Abstract: A plasma processing apparatus includes a processing chamber including a dielectric window; a coil-shaped RF antenna, provided outside the dielectric window; a substrate supporting unit provided in the processing chamber; a processing gas supply unit; an RF power supply unit for supplying an RF power to the RF antenna to generate a plasma of the processing gas by an inductive coupling in the processing chamber, the RF power having an appropriate frequency for RF discharge of the processing gas; a correction coil, provided at a position outside the processing chamber where the correction coil is to be coupled with the RF antenna by an electromagnetic induction, for controlling a plasma density distribution on the substrate in the processing chamber; a switching device provided in a loop of the correction coil; and a switching control unit for on-off controlling the switching device at a desired duty ratio by pulse width modulation.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: April 10, 2018
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Yohei Yamazawa, Chishio Koshimizu, Masashi Saito, Kazuki Denpoh, Jun Yamawaku
  • Patent number: 9899191
    Abstract: A plasma processing apparatus includes a processing chamber including a dielectric window; a coil-shaped RF antenna, provided outside the dielectric window; a substrate supporting unit provided in the processing chamber; a processing gas supply unit; an RF power supply unit for supplying an RF power to the RF antenna to generate a plasma of the processing gas by an inductive coupling in the processing chamber, the RF power having an appropriate frequency for RF discharge of the processing gas; a correction coil, provided at a position outside the processing chamber where the correction coil is to be coupled with the RF antenna by an electromagnetic induction, for controlling a plasma density distribution on the substrate in the processing chamber; a switching device provided in a loop of the correction coil; and a switching control unit for on-off controlling the switching device at a desired duty ratio by pulse width modulation.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: February 20, 2018
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Yohei Yamazawa, Chishio Koshimizu, Masashi Saito, Kazuki Denpoh, Jun Yamawaku
  • Patent number: 9583312
    Abstract: A film formation device to conduct a film formation process for a substrate includes a rotating table, a film formation area configured to include a process gas supply part, a plasma processing part, a lower bias electrode provided at a lower side of a position of a height of the substrate on the rotating table, an upper bias electrode arranged at the same position of the height or an upper side of a position of the height, a high-frequency power source part connected to at least one of the lower bias electrode and the upper bias electrode and configured to form a bias electric potential on the substrate in such a manner that the lower bias electrode and the upper bias electrode are capacitively coupled, and an exhaust mechanism.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: February 28, 2017
    Assignee: Tokyo Electron Limited
    Inventors: Jun Yamawaku, Chishio Koshimizu, Yohei Yamazawa, Mitsuhiro Tachibana, Hitoshi Kato, Takeshi Kobayashi, Shigehiro Miura, Takafumi Kimura
  • Patent number: 9502215
    Abstract: A plasma processing apparatus is provided. According to the apparatus, a main antenna connected to a high frequency power source and an auxiliary antenna electrically insulated from main antenna is arranged. Moreover, projection areas when the main antenna and the auxiliary antenna are seen in a plan view are arranged so as not to overlap with each other. More specifically, the auxiliary antenna is arranged on a downstream side in a rotational direction of the turntable relative to the main antenna. Then, a first electromagnetic field is generated in the auxiliary antenna by way of an induction current flowing through the main antenna, and a second induction plasma is generated even in an area under the auxiliary antenna in addition to an area under the main antenna by resonating the auxiliary antenna.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: November 22, 2016
    Assignee: Tokyo Electron Limited
    Inventors: Hitoshi Kato, Shigehiro Miura, Chishio Koshimizu, Jun Yamawaku, Yohei Yamazawa
  • Publication number: 20160315001
    Abstract: A transfer chamber is provided between a processing unit for performing a predetermined process on a target substrate to be processed in a depressurized environment and an atmospheric maintaining unit for maintaining the target substrate in an atmospheric environment to transfer the target substrate therebetween. The transfer chamber includes a chamber main body for accommodating the target substrate, a gas exhaust unit for exhausting the chamber main body to set the chamber main body to the depressurized environment, and a gas supply unit for supplying a predetermined gas to the chamber main body to set the chamber main body in the atmospheric environment. Further, in the transfer chamber, an ionization unit is provided outside the chamber main body, for ionizing the predetermined gas and an ionized gas supply unit is provided to supply the ionized gas generated by the ionization unit to the chamber main body.
    Type: Application
    Filed: July 1, 2016
    Publication date: October 27, 2016
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Jun YAMAWAKU, Junji OIKAWA, Hiroyuki NAKAYAMA
  • Publication number: 20160203951
    Abstract: A plasma processing apparatus includes a processing chamber including a dielectric window; a coil shaped RF antenna provided outside the dielectric window; a substrate supporting unit, provided in the processing chamber, for mounting thereon a target substrate to be processed; a processing gas supply unit for supplying a desired processing gas to the processing chamber to perform a desired plasma process on the target substrate; and an RF power supply unit for supplying an RF power to the RF antenna to generate a plasma of the processing gas by an inductive coupling in the processing chamber. The apparatus further includes a floating coil electrically floated and arranged at a position outside the processing chamber where the floating coil is to be coupled with the RF antenna by an electromagnetic induction; and a capacitor provided in a loop of the floating coil.
    Type: Application
    Filed: March 24, 2016
    Publication date: July 14, 2016
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Yohei YAMAZAWA, Chishio KOSHIMIZU, Kazuki DENPOH, Jun YAMAWAKU, Masashi SAITO
  • Patent number: 9385015
    Abstract: A transfer chamber is provided between a processing unit for performing a predetermined process on a target substrate to be processed in a depressurized environment and an atmospheric maintaining unit for maintaining the target substrate in an atmospheric environment to transfer the target substrate therebetween. The transfer chamber includes a chamber main body for accommodating the target substrate, a gas exhaust unit for exhausting the chamber main body to set the chamber main body to the depressurized environment, and a gas supply unit for supplying a predetermined gas to the chamber main body to set the chamber main body in the atmospheric environment. Further, in the transfer chamber, an ionization unit is provided outside the chamber main body, for ionizing the predetermined gas and an ionized gas supply unit is provided to supply the ionized gas generated by the ionization unit to the chamber main body.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: July 5, 2016
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Jun Yamawaku, Junji Oikawa, Hiroyuki Nakayama
  • Publication number: 20160172160
    Abstract: A plasma processing apparatus includes: an evacuable processing chamber including a dielectric window; a substrate supporting unit, provided in the processing chamber, for mounting thereon a target substrate; a processing gas supply unit for supplying a desired processing gas to the processing chamber to perform a plasma process on the target substrate; a first RF antenna, provided on the dielectric window, for generating a plasma by an inductive coupling in the processing chamber; and a first RF power supply unit for supplying an RF power to the first RF antenna. The first RF antenna includes a primary coil provided on or above the dielectric window and electrically connected to the first RF power supply unit; and a secondary coil provided such that the coils are coupled with each other by an electromagnetic induction therebetween while being arranged closer to a bottom surface of the dielectric window than the primary coil.
    Type: Application
    Filed: January 27, 2016
    Publication date: June 16, 2016
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Yohei YAMAZAWA, Masashi SAITO, Kazuki DENPOH, Chishio KOSHIMIZU, Jun YAMAWAKU
  • Patent number: 9349618
    Abstract: A substrate processing apparatus capable of removing deposits attached on a component of a lower temperature in a gap between two components, temperatures of which are greatly different from each other, without degrading a working ratio of the substrate processing apparatus. In the substrate processing apparatus, a chamber receives a wafer, a focus ring surrounds the wafer disposed in the chamber, a side surface protective member transmits a laser beam, a laser beam irradiating apparatus irradiates the laser beam to the side surface protective member, an inner focus ring of the focus ring is disposed adjacent to the wafer and is cooled down and an outer focus ring surrounds the inner focus ring and is not cooled down in a focus ring, and a facing surface of the side surface protective member faces a gap between the inner focus ring and the outer focus ring.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: May 24, 2016
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Jun Yamawaku, Chishio Koshimizu
  • Publication number: 20160126063
    Abstract: A plasma processing apparatus includes a plasma generation unit configured to convert a processing gas supplied into a processing chamber into plasma by an inductive coupling. The plasma generation unit includes a first high frequency antenna formed of a vortex coil arranged adjacent to the processing chamber through a dielectric window, a second high frequency antenna having a natural resonant frequency and formed of a vortex coil arranged at an outer or inner peripheral side of the first high frequency antenna, and an impedance adjustment unit for adjusting a resonant frequency of a circuit viewed from the high frequency power supply toward the first high frequency antenna. The circuit viewed from the high frequency power supply toward the first high frequency antenna is configured to have two resonant frequencies depending on adjustment of the impedance adjustment unit when a frequency of high frequency power is changed.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 5, 2016
    Inventors: Jun YAMAWAKU, Tatsui MATSUDO, Chishio KOSHUMIZU
  • Publication number: 20160126065
    Abstract: A plasma processing apparatus includes a plasma generation unit for converting a processing gas into plasma by an inductive coupling. The plasma generation unit includes a first high frequency antenna formed of a vortex coil having open opposite endse and, at a central portion of a line between the open ends, a supply point of a high frequency power and a grounding point grounded through a capacitor; a second high frequency antenna formed of a planar vortex coil disposed between first and second high frequency antenna elements of the first high frequency antenna; and an impedance adjustment unit for adjusting a resonant frequency of a circuit viewed from a high frequency power supply toward the first high frequency antenna which is configured to have two resonant frequencies depending on adjustment of the impedance adjustment unit when the frequency of the high frequency power is changed.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 5, 2016
    Inventors: Jun YAMAWAKU, Tatsuo MATSUDO, Chishio KOSHIMIZU
  • Publication number: 20160126064
    Abstract: A plasma processing apparatus includes a high frequency antenna having first and second antenna elements. One end of the first antenna element is grounded and the other end thereof is connected to a high frequency power supply. One end of the second antenna element is an open end and the other end thereof is connected to either one of the one end and the other end of the first antenna element, a line length of the second antenna element having a value obtained by multiplying ((?/4)+n?/2) by a fractional shortening (? is a wavelength of high frequency in vacuum and n is a natural number). A circuit viewed from the high frequency power supply toward the high frequency antenna is configured to generate, when a frequency of a high frequency power is changed, two resonant frequencies by an adjustment of the impedance adjustment unit.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 5, 2016
    Inventors: Jun YAMAWAKU, Tatsuo MATSUDO, Chishio KOSHIMIZU