Patent ID: 9499897
Filing Date: 2016-11-22
CPC Classification: C23C

Claim Text:
1. A thin film forming apparatus, for forming a thin film on each of a plurality of substrates, comprising: a substrate holder which holds the plurality of substrates, a supporter which supports the substrate holder, and a rotator which rotates the supporter, wherein the substrate holder is formed in an annular shape in a plan view, and comprises a plurality of holding jigs formed in a circular-arc shape in a plan view, wherein each of the holding jigs comprises a bottom plate portion having longitudinal sides curved along a concentric circular-arc about a rotation axis of the rotator, an inner upright wall portion protruding upright from an inner end side of the bottom plate portion and having a surface curved along the concentric circular-arc about the rotation axis of the rotator, and an outer upright wall portion protruding upright from an outer end side of the bottom plate portion and having a surface curved along the concentric circular-arc about the rotation axis of the rotator, wherein the bottom plate portion comprises: a stairs portion of which the bottom surface is formed in a stairs shape along the circumference of the substrate holder, wherein the stairs portion comprises: a plurality of holding surfaces which holds the plurality of substrates and is disposed between a film forming source emitting a material of the thin film and the plurality of substrates, a plurality of step portions which is formed between the plurality of holding surfaces, and a plurality of opening portions each of which is formed in each of the plurality of holding surfaces, and wherein the plurality of step portions are configured to contact with an end of each of the plurality of substrates, wherein the inner upright wall and the outer upright wall are configured that the curved surface of the inner upright wall contacts with one point of an inner surface of each of the plurality of substrates, or that the curved surface of the outer upright wall contacts with two points of an outer surface of each of the plurality of substrates, wherein when ends of the plurality of substrates respectively come into contact with the step portions in a state where a part of a non-film forming portion on which the thin film is not to be formed in each of the plurality of substrates overlaps other one of the plurality of substrates and a film forming portion on which the thin film is to be formed is exposed, the plurality of substrates are loaded in a manner that the film forming portion is exposed to the film forming source through the opening portion.