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US 10,980,101 B2Granted
Plasma generating device
AssigneeFuji Corporation
InventorsAkihiro Niwa, Takahiro Jindo
Life of this patent
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Abstract
An atmospheric pressure plasma generating device includes a nozzle block in which fourth gas passages from which plasma gas is emitted are formed, is covered by cover, and a through-hole is formed in the cover such that the leading end of the fourth gas passage is positioned on the inside. Heated gas is supplied inside the cover and is emitted from the through-hole of the cover, and plasma gas is emitted so as to penetrate the heated gas. By the plasma gas being surrounded by the heated gas in this manner, deactivation of the plasma gas is prevented. A distance between the leading end of the fourth gas passage and an opening of the through-hole at an outer wall of the cover is set from 0 to 2 mm in an emission direction of the plasma gas.
Claims6
A plasma generating device comprising:
- a housing in which is formed a reaction chamber for plasmarizing processing gas;
- multiple emission ports formed in the housing through which plasma gas plasmarized in the reaction chamber is emitted from the housing;
- a lower section housing where multiple gas passages are formed and respectively connected with the emission ports extending in an emitting direction of the plasma gas emitted from the emission ports, the gas passages being lined up in a direction perpendicular to the emitting direction at specified intervals;
- a cover provided on the housing in a state covering at least the emission ports;
- a gas supply device configured to supply heated gas heated inside the cover;
- and
- a through-hole formed in a lower surface of the cover such that ends of the emission ports are positioned inside the through-hole,
- wherein the heated gas supplied from the gas supply device that enters inside the cover is diffused and the diffused heated gas inside the cover is emitted through the through-hole,
- wherein the ends of the emission ports are provided in a lower end surface of a nozzle block arranged to be positioned inside the through-hole such that the plasma gas emitted from the ends of the emission ports penetrates inside the diffused heated gas emitted through the through-hole,
- wherein a distance between the ends of the emission ports and an opening of the through-hole at an outer wall of the cover is 0 to 2 millimeters in the emitting direction of the plasma gas emitted from the emission ports,
- wherein the gas supply device includes a supply tube for supplying heated gas,
- wherein a cross section area of an internal section of the cover in a direction perpendicular to a supply direction of the heated gas supplied inside the cover is larger than a cross section area of the supply tube in a diameter direction,
- wherein the lower section housing diffuses the heated gas supplied inside the cover, the lower section housing being arranged inside the cover facing a supply hole for supplying the heated gas inside the cover, and
- wherein a surface area of a surface along which the gas passages are lined up of the lower section housing facing the supply hole is larger than the cross section area of the supply tube in the diameter direction.
11 more elements
A plasma generating device comprising:
- a housing in which is formed a reaction chamber for plasmarizing processing gas;
- multiple emission ports formed in the housing through which plasma gas plasmarized in the reaction chamber is emitted from the housing;
- a lower section housing where multiple gas passages are formed and respectively connected with the emission ports extending in an emitting direction of the plasma gas emitted from the emission ports, the gas passages being lined up in a direction perpendicular to the emitting direction at specified intervals;
- a cover provided on the housing in a state covering at least the emission ports;
- a gas supply device configured to supply heated gas heated inside the cover;
- and
- a through-hole formed in a lower surface of the cover such that ends of the emission ports are positioned inside the through-hole,
- wherein the heated gas supplied from the gas supply device that enters inside the cover is diffused and the diffused heated gas inside the cover is emitted through the through-hole, and
- wherein the ends of the emission ports are provided in a lower end surface of a nozzle block arranged to be positioned inside the through-hole such that the plasma gas emitted from the ends of the emission ports penetrates inside the diffused heated gas emitted through the through-hole,
- wherein the gas supply device includes a supply tube for supplying heated gas,
- wherein a cross section area of an internal section of the cover in a direction perpendicular to a supply direction of the heated gas supplied inside the cover is larger than a cross section area of the supply tube in a diameter direction,
- wherein the lower section housing diffuses the heated gas supplied inside the cover, the lower section housing being arranged inside the cover facing a supply hole for supplying the heated gas inside the cover, and
- wherein a surface area of a surface along which the gas passages are lined up of the lower section housing facing the supply hole is larger than the cross section area of the supply tube in the diameter direction.
10 more elements
Dependencies are inferred from the claim text.