Method of producing epitaxial silicon wafer, epitaxial silicon wafer, and method of producing solid-state image sensing device
First Claim
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1. A method of producing an epitaxial silicon wafer, comprising:
- a first step of irradiating a silicon wafer free of dislocation clusters and COPs with cluster ions to form a modifying layer formed from a constituent element of the cluster ions in a surface portion of the silicon wafer; and
a second step of forming an epitaxial layer on the modifying layer of the silicon wafer,wherein, after the first step, the silicon wafer is transferred into an epitaxial growth apparatus to be subjected to the second step without heat treating the silicon wafer for recovering its crystallinity.
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Abstract
Provided is an epitaxial silicon wafer free of epitaxial defects caused by dislocation clusters and COPs with reduced metal contamination achieved by higher gettering capability and a method of producing the epitaxial wafer. A method of producing an epitaxial silicon wafer includes a first step of irradiating a silicon wafer free of dislocation clusters and COPs with cluster ions to form a modifying layer formed from a constituent element of the cluster ions in a surface portion of the silicon wafer; and a second step of forming an epitaxial layer on the modifying layer of the silicon wafer.
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9 Claims
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1. A method of producing an epitaxial silicon wafer, comprising:
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a first step of irradiating a silicon wafer free of dislocation clusters and COPs with cluster ions to form a modifying layer formed from a constituent element of the cluster ions in a surface portion of the silicon wafer; and a second step of forming an epitaxial layer on the modifying layer of the silicon wafer, wherein, after the first step, the silicon wafer is transferred into an epitaxial growth apparatus to be subjected to the second step without heat treating the silicon wafer for recovering its crystallinity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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