Patent ID: 8826856

Claim:
An optical thin-film vapor deposition apparatus for vapor depositing a vapor deposition substance onto substrates within a vacuum vessel, comprising: a dome shaped holder disposed within the vacuum vessel and configured to hold the substrates; rotating means configured to rotate the dome shaped holder; a vapor deposition source disposed oppositely to the substrates for vaporizing the vapor deposition substance to form a source gas and emitting the substance toward the substrates; an ion source configured to extract ions from a plasma of the source gas of the ions in the vacuum vessel and irradiate an ion beam of the ions to the substrates; and a neutralizer configured to irradiate electrons to the substrates; wherein the ion source is disposed at a position such that a maximum angle defined between an axis for each direction, along which ions travel from the ion source to each of the substrates, and a line perpendicular to a surface of each of the corresponding substrates held by the dome shaped holder, is between 8° inclusive and 40° inclusive; and H/D is within a range between 0.5 inclusive and 1.2 inclusive; wherein H/D is a ratio of a distance, H, in a vertical direction between (i) an intersection between a center of rotational axis of the dome shaped holder and the dome shaped holder itself, and (ii) a center of the ion source; relative to a diameter, D, of the dome shaped holder.