EP0276959A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing crystal article
Assignee: Canon Inc
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Filing: 1988-01-25
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Granted: —
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Expires: 2008-01-25
Abstract
Abstract process for producing a crystal article comprises the step of preparing a substrate having a concavity and a nucleation surface provided thereon, said nucleation surface being constituted of a material which is sufficiently greater in nucleation density than the material constituting the bottom surface of the concavity and having a surface area which is sufficiently small to the extent such only a single nucleus can grow, the step of forming a single nucleus on said nucleation surface and permitting a single crystal to grow by applying crystal growth treatment onto said nucleus, and the step of removing the surface portion of the crystal formed over the upper surface of the convexity of said substrate by selective polishing.
Inventors
- 👤 Hidemasa Mizutani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B25/18; H; H10; H10D; H10D30/00; H10D30/60; H10D30/67; H10D30/674; H10D30/6741; H10D30/6743; H10D30/6744; H10P; H10P14/00; H10P14/20; H10P14/24; H10P14/27; H10P14/271; H10P14/274; H10P14/29; H10P14/2901; H10P14/2921; H10P14/34; H10P14/3402; H10P14/3404; H10P14/3411
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A process for producing a crystal article, comprising the step of preparing a substrate having a recess and a nucleation surface provided thereon, said nucleation surface being constituted of a material which is sufficiently greater in nucleation density than the material constituting the bottom surface of the recess and having a surface area which is sufficiently small to the extent such only a single nucleus can grow, the step of forming a single nucleus on said nucleation surface and permitting a single crystal to grow by applying crystal growth treatment onto said nucleus, and the step of removing the surface portion of the crystal formed over the upper surface of the convexity of said substrate by selective polishing.
Claim 2
Dependent Claim
118 words
A process for producing a crystal article, comprising the step of preparing a substrate having a recess and a nucleation surface provided thereon, said nucleation surface being constituted of a material which is sufficiently greater in nucleation density than the material constituting the bottom surface of the recess and having a surface area which is sufficiently small to the extent such only a single nucleus can grow, the step of forming a single nucleus on said nucleation surface and permitting a single crystal to grow by applying crystal growth treatment onto said nucleus, and the step of removing the surface portion of the crystal formed over the upper surface of the convexity of said substrate by selective polishing.
Claim 3
Dependent Claim
91 words
A process for producing a crystal article, comprising providing a nucleation surface on or in the surface of a substrate, the nucleation surface being of a material whose nucleation density is sufficiently greater than that of the material constituting the substrate, and the area of the nucleation surface being sufficiently small, that only a single nucleus can grow, forming a single nucleus on said nucleation surface and applying a crystal growth treatment to the nucleus to grow a single crystal thereon, and selectively polishing the crystal to flatten the surface thereof.
Claim 4
Dependent Claim
91 words
A process for producing a crystal article, comprising providing a nucleation surface on or in the surface of a substrate, the nucleation surface being of a material whose nucleation density is sufficiently greater than that of the material constituting the substrate, and the area of the nucleation surface being sufficiently small, that only a single nucleus can grow, forming a single nucleus on said nucleation surface and applying a crystal growth treatment to the nucleus to grow a single crystal thereon, and selectively polishing the crystal to flatten the surface thereof.
References Cited (Backward Citations)
No citation records indexed.
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