摘要:
A mounting stage for a plasma processing apparatus that can prevent degradation of an insulating film in a semiconductor device on a substrate. A conductor member is connected to a radio-frequency power source for producing plasma. A dielectric layer is buried in a central portion of an upper surface of the conductor member. An electrostatic chuck is mounted on the dielectric layer. The electrostatic chuck has an electrode film that satisfies the following condition: δ/z≧85 where δ=(ρv/(μπf))1/2 where z is the thickness of the electrode film, δ is the skin depth of the electrode film with respect to radio-frequency electrical power supplied from the radio-frequency power source, f is the frequency of the radio-frequency electrical power, π is the ratio of a circumference of a circle to its diameter, μ is the magnetic permeability of the electrode film, and ρv is the specific resistance of the electrode film.
摘要:
An apparatus for holding an object to be processed, according to this invention is mounted in a plasma processing apparatus and includes a convex-shaped holder main body, first dielectric film, and second dielectric film. The holder main body has a holding portion which holds an object to be processed placed on it and a flange formed on the peripheral portion of the holding portion to fit with a focus ring. The first dielectric film attracts the object to be processed placed on the holding portion to the holder main body by a Coulomb force. The second dielectric film attracts the focus ring fitted on the flange to the holder main body by an attracting force larger than that of the first dielectric film using a Johnson-Rahbek force. The electrostatic attracting force of the focus ring for the holder main body is increased, so that the cooling effect is increased. A change in plasma processing characteristics over time in the vicinity of the focus ring can be eliminated, and the entire surface of the object to be processed can be processed uniformly.
摘要:
A plasma processing apparatus includes: a processing chamber that accommodates a substrate therein; a lower electrode positioned within the processing chamber and serving as a mounting table; an upper electrode positioned to face the lower electrode within the processing chamber; a first high frequency power supply that applies high frequency power for plasma generation of a first frequency to the lower electrode or the upper electrode; a second high frequency power supply that applies high frequency power for ion attraction of a second frequency lower than the first frequency to the lower electrode; at least one bias distribution control electrode positioned at least in a peripheral portion above the lower electrode; and at least one bias distribution control power supply that applies an AC voltage or a square wave voltage of a third frequency lower than the second frequency to the at least one bias distribution control electrode.
摘要:
A plasma processing apparatus includes: a vacuum-evacuable processing chamber; a lower central electrode; a lower peripheral electrode surrounding the lower central electrode in an annular shape; an upper electrode provided to face the lower central electrode and the lower peripheral electrode; a processing gas supply unit for supplying a processing gas into the processing chamber; an RF power supply for outputting an RF power for generating a plasma; and a power feed conductor connected to a rear surface of the lower peripheral electrode to supply the RF power to the lower peripheral electrode. The apparatus further includes a variable capacitance coupling unit for electrically connecting the lower central electrode with at least one of the power feed conductor and the lower peripheral electrode by capacitance coupling with a variable impedance in order to supply a part of the RF power from the RF power supply to the lower central electrode.
摘要:
A plasma processing apparatus and a focus ring enables to perform uniform plasma processing over the entire surface of a substrate to be processed to thereby improve in-surface uniformity of plasma processing compared with conventional cases. The focus ring is disposed on a susceptor 2, which serves to mount thereon a semiconductor wafer W and further functions as a lower electrode, to surround a periphery of the semiconductor wafer W. The focus ring 6 includes a ring member of a thin plate shape disposed to surround the periphery of the wafer W while maintaining a gap therebetween and a lower ring body installed below the semiconductor wafer and the ring member of the thin plate shape.
摘要:
A substrate processing method uses a substrate processing apparatus including a chamber for accommodating a substrate, a lower electrode to mount the substrate, a first RF power applying unit for applying an RF power for plasma generation into the chamber, and a second RF power applying unit for applying an RF power for bias to the lower electrode. The RF power for plasma generation is controlled to be intermittently changed by changing an output of the first RF power applying unit at a predetermined timing. If no plasma state or an afterglow state exists in the chamber by a control of the first RF power applying unit, an output of the second RF power applying unit is controlled to be in an OFF state or decreased below an output of the second RF power applying unit when the output of the first RF power applying unit is a set output.
摘要:
The present invention provides an upper electrode used in an etching apparatus and the etching apparatus including the upper electrode, both of which can properly reduce intensity of electric field of plasma around a central portion of a substrate to be processed, thus enhancing in-plane uniformity of a plasma process. In this apparatus, a recess, serving as a space for allowing a dielectric to be injected therein, is provided around a central portion of the upper electrode. A dielectric supply passage configured for supplying the dielectric into the space and a dielectric discharge passage configured for discharging the dielectric from the space are connected with the space, respectively. With such configuration, the dielectric can be controllably supplied into the recess, such that in-plane distribution of the intensity of the electric field can be uniformed, corresponding to in-plane distribution of the intensity of the electric field of the plasma generated under various process conditions, such as a kind of each wafer that will be etched, each processing gas that will be used, and the like.
摘要:
There are provided a matching unit capable of sufficiently matching the impedance of a high frequency load to a transmission path impedance without increasing its size and matching time even if a high frequency power of 70 MHz or higher is supplied thereto, and a plasma processing system using the same. A matching unit 41 comprises: a resonance rod 61 for transmitting a high frequency energy from a high frequency power supply 40 to a plasma producing electrode; a variable capacitor 62, connected to the resonance rod 61 and an electrode 21 in series, for adjusting the imaginary part of an impedance complex number; a housing 63 which is provided outside of the resonance rod 61 and which is grounded; a link coil 64 for exciting a high frequency energy to the resonance rod 61 and for adjusting the real part of the impedance complex number; and a controller 69 for controlling a driving part for the variable capacitor 62 and the link coil 64 so that a series resonance circuit is formed between the high frequency power supply 40 and the ground via plasma in a matching state.
摘要:
There are provided a substrate processing apparatus and a substrate processing method realizing an effective reduction of a voltage change of a substrate on an electrode to reduce the variation of incident energy of ions entering the substrate. The substrate processing apparatus includes: a first electrode holding a substrate on a main surface of the first electrode; a second electrode facing the first electrode; a RF power source applying to the first electrode a RF voltage whose frequency is equal to or higher than 40 MHz; and a pulse voltage applying unit applying to the first electrode a pulse voltage decreasing in accordance with a lapse of time, by superimposing the pulse voltage on the RF voltage.
摘要:
A transfer apparatus transfers an object to be transferred onto a case. The transfer apparatus includes a transfer arm, an arm shaft, a plurality of electromagnets, and a control unit. The transfer arm has a pick unit on a front end thereof and extends and retracts in a horizontal direction. The object to be transferred is held on the pick unit. The arm shaft supports the transfer arm. The plurality of electromagnets apply an force in upward direction to the transfer arm by generating a magnetic field in the case. The control unit controls the plurality of electromagnets in such a manner that when the transfer arm extends and retracts in the horizontal direction, the force in upward direction applied to the transfer arm increases as a length from the arm shaft to the front end of the transfer arm increases.