摘要:
Spherical particles of a rare earth (inclusive of yttrium)-containing compound and having a breaking strength of 10-300 MPa and an average particle diameter of 10-80 μm are suitable for plasma spraying.
摘要:
A wafer has a rare earth oxide layer disposed, typically sprayed, on a substrate. It is useful as a dummy wafer in a plasma etching or deposition system.
摘要:
A corrosion resistant member to be exposed to a halogen-containing gas atmosphere or a halogen-containing gas plasma atmosphere, comprising a substrate and a plurality of layers deposited thereon including a layer of rare earth fluoride providing the outermost surface and a layer of rare earth oxide having a porosity of less than 5% underlying the rare earth fluoride layer.
摘要:
A wafer has a rare earth fluoride coating disposed, typically sprayed on a substrate as an outermost layer, the rare earth fluoride being selected from lanthanoid fluorides, yttrium fluoride, and scandium fluoride. It is useful as a dummy wafer in a plasma etching or deposition system.
摘要:
By using a rare earth metal having a minimal content of impurity metal element, machining it into a member and cleaning with an organic acid-base capping agent, there is obtained a rare earth metal member composed entirely of a rare earth metal and containing not more than 100 ppm of impurity metal element in a sub-surface zone, which member is characterized by a high surface purity, a large grain size, minimized grain boundaries, and improved halogen resistance or corrosion resistance.
摘要:
By using a rare earth metal having a minimal content of impurity metal element, machining it into a member and cleaning with an organic acid-base capping agent, there is obtained a rare earth metal member composed entirely of a rare earth metal and containing not more than 100 ppm of impurity metal element in a sub-surface zone, which member is characterized by a high surface purity, a large grain size, minimized grain boundaries, and improved halogen resistance or corrosion resistance.
摘要:
Rare earth oxide particles having an average particle diameter of 3-20 &mgr;m, a dispersion index of up to 0.4, and an aspect ratio of up to 2 are suitable for thermal spraying. Despite their high melting point, the rare earth oxide particles of high purity can form an adherent coating by thermal spraying.
摘要:
A wafer has a rare earth oxide layer disposed, typically sprayed, on a substrate. It is useful as a dummy wafer in a plasma etching or deposition system.
摘要:
A wafer has a rare earth oxide layer disposed, typically sprayed, on a substrate. It is useful as a dummy wafer in a plasma etching or deposition system.
摘要:
A corrosion resistant member to be exposed to a halogen-containing gas atmosphere or a halogen-containing gas plasma atmosphere, comprising a substrate and a plurality of layers deposited thereon including a layer of rare earth fluoride providing the outermost surface and a layer of rare earth oxide having a porosity of less than 5% underlying the rare earth fluoride layer.