Patent ID: 9460941
Filing Date: 2016-10-04
CPC Classification: B01D,H01L

Claim Text:
1. A substrate cleaning apparatus that cleans a lower surface of a substrate, comprising: a rotating member that is provided to be rotatable around a rotation axis extending in a vertical direction and has an opening at the center thereof; a rotation-driving device that is provided on an upper side of said rotating member to rotate said rotating member; a holding member that is provided on a lower side of said rotating member to hold the substrate with an upper surface of the substrate being opposite to said rotating member; an air supplying mechanism that supplies air to a space between the substrate held by said holding member and said rotating member through the opening of said rotating member; and a cleaning mechanism that cleans the lower surface of the substrate held by said holding member, wherein said air supplying mechanism includes a filter, an air supplier that supplies air to said filter, and an air passage configured to lead the air that has passed through said filter to the opening of said rotating member, said air passage being configured to have a cross sectional area reducing gradually from said filter to said opening of said rotating member, and said air passage further includes a filter storing member that has a first outlet port and is configured to store said filter and allow the air supplied by said air supplier to flow out from the first outlet port through the inside of said stored filter, a passage forming member that has a second outlet port having an opening area smaller than the first outlet port and that is connected to said filter storing member to receive the air that has flowed out from the first outlet port and is configured to lead the air that has flowed out from the first outlet port to the second outlet port, and a connection member that has a third outlet port having an opening area smaller than the second outlet port and is configured to receive the air that has flowed out from the second outlet port and lead the air that has flowed out from the second outlet port to the third outlet port, said connection member being configured to be connectable to and detachable from said passage forming member.