Object-processing apparatus controlling production of particles in electric field or magnetic field
View Patent ↗An apparatus includes a housing defining a chamber in which an electric field is generated, and an internal member provided in the chamber. At least one part of the internal member is formed of a dielectric material. A process is executed in the chamber so that a dielectric deposit is formed on the at least one part of the internal member. An m 1 (d∈ 1 /dm 1 ) value of the dielectric material and an m 2 (d∈ 2 /dm 2 ) value of the dielectric deposit are set so that production of particles from the deposit is properly controlled. The term m 1 is a mass density of the dielectric material, ∈ 1 is a permittivity of the dielectric material, m 2 is a mass density of the dielectric deposit, and ∈ 2 is a permittivity of the dielectric deposit.
1. An apparatus, comprising:
a housing defining a chamber having a gas inlet and outlet in which an electric field is generated by upper and lower electrodes; and an internal ring-shaped member provided in said chamber, wherein at least one part of said internal ring-shaped member, every sidewall portion of the chamber, and said gas inlet and outlet are formed of a first dielectric material,
wherein said electric field causes formation of a second dielectric deposit on the first dielectric material on the at least one part of said internal ring-shaped member including the sidewall portions, such that an m 1 (d∈ 1 /dm 1 ) value of said first dielectric material and an m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit are different from each other and are set so that production of particles from said second dielectric deposit is controlled, m 1 being a mass density of said first dielectric material, ∈ 1 being a permittivity of said first dielectric material, m 2 being a mass density of said second dielectric deposit, and ∈ 2 being a permittivity of said second dielectric deposit,
wherein the internal ring-shaped member is provided to position a wafer on the lower electrode or is provided surrounding the upper electrode.
2. The apparatus as set forth in claim 1 , wherein a difference between the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material and the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit falls within a range of ±5%.
3. The apparatus as set forth in claim 1 , wherein the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material is larger than the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit.
4. The apparatus as set forth in claim 1 , wherein the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material is smaller than the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit.
5. The apparatus as set forth in claim 1 , wherein a difference between the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material is within a range of ±5% the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit when said apparatus is constituted as either a plasma chemical vapor deposition apparatus or a focused ion beam apparatus.
6. The apparatus as set forth in claim 5 , wherein said first dielectric material is either titanium dioxide (TiO 2 ) or yttrium aluminum garnet (YAG).
7. The apparatus as set forth in claim 1 , wherein the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material is smaller than the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit when said apparatus is constituted as either a plasma etching apparatus or a thermal chemical vapor deposition apparatus.
8. The apparatus as set forth in claim 7 , wherein said first dielectric material is one selected from the group consisting of yttrium aluminum garnet (YAG), barium titanate (BaTiO 3 ) and lead zirconate/titanate (Pb(Zr,Ti)O 3 ).
9. The apparatus as set forth in claim 1 , wherein the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material is larger than the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit when said apparatus is constituted as a plasma etching apparatus, and when said internal member is positioned beneath said plasma.
10. The apparatus as set forth in claim 9 , wherein said first dielectric material is one selected from the group consisting of titanium dioxide (TiO 2 ), potassium dihydrogenphosphate (KH 2 PO 4 ) and lead zirconate (PbZrO 3 ).
11. The apparatus as set forth in claim 1 , wherein the m 1 (d∈ 1 /dm 1 ) value of said first dielectric material is larger than the m 2 (d∈ 2 /dm 2 ) value of said second dielectric deposit when said apparatus is constituted as an electron beam exposure apparatus.
12. The apparatus as set forth in claim 11 , wherein said first dielectric material is titanium dioxide (TiO 2 ).
13. The apparatus as set forth in claim 1 , wherein said second dielectric deposit contains a plurality of components, and wherein the m 2 (d∈ 2 /dm 2 ) value of said first dielectric deposit is represented by that of a main one of said components.
14. The apparatus as set forth in claim 1 , wherein said second dielectric deposit contains a plurality of components, and wherein the m 2 (d∈ 2 /dm 2 ) value of said first dielectric deposit is represented by an average of those of said components.
15. An apparatus, comprising:
a housing defining a chamber having a gas inlet and outlet in which a magnetic field is generated at a first portion thereof and focused at a second portion thereof opposite to the first portion; and an internal member provided in said chamber, wherein said internal member, every sidewall portion of the chamber, and said gas inlet and outlet are formed of a first magnetic material,
wherein said magnetic field causes formation of a second magnetic deposit on the first magnetic material on said internal member including the sidewall portions, such that an m 1 (dμ 1 /dm 1 ) value of said first magnetic material and an m 2 (dμ 2 /dm 2 ) value of said second magnetic deposit are different from each other and are set so that production of particles from said first magnetic deposit is controlled, m 1 being a mass density of said first magnetic material, μ 1 being a permeability of the first magnetic material, m 2 being a mass density of said second magnetic deposit, and μ 2 being a permittivity of said second magnetic deposit.
16. The apparatus as set forth in claim 15 , wherein a difference between the m 1 (dμ 1 /dm 1 ) value of said first magnetic material and the m 2 (dμ 2 /dm 2 ) value of said second magnetic deposit falls within a range of ±5%.
17. The apparatus as set forth in claim 15 , wherein the m 1 (dμ 1 /dm 1 ) value of said first magnetic material is larger than the m 2 (dμ 2 /dm 2 ) value of said second magnetic deposit when said apparatus is constituted as a magnetic-field assist type plasma etching apparatus.
18. The apparatus as set forth in claim 15 , wherein the m 1 (dμ 1 /dm 1 ) value of said first magnetic material is smaller than the m 2 (dμ 2 /dm 2 ) value of said second magnetic deposit when said apparatus is constituted as an electron cyclotron resonance type plasma etching apparatus.
19. The apparatus as set forth in claim 15 , wherein said second magnetic deposit contains a plurality of components, and wherein the m 2 (dμ 2 /dm 2 ) value of said second magnetic deposit is represented by that of a main one of said components.
20. The apparatus as set forth in claim 15 , wherein said second magnetic deposit contains a plurality of components, and wherein the m 2 (dμ 2 /dm 2 ) value of said second magnetic deposit is represented by an average of those of said components.