Patent ID: 7584760
Filing Date: 2009-09-08
Classification: B08B,G03F,H01L,Y10S

Abstract:
1. A substrate processing apparatus comprising: (a) a substrate holding part to hold a substrate in its substantially horizontal position; (b) a rotary part to rotate a substrate held by said substrate holding part in a substantially horizontal plane; (c) a processing liquid supply part to selectively supply a plurality of types of processing liquids to a substrate held by said substrate holding part; (d) a plurality of guide parts of substantially annulus ring shape that receives a processing liquid flying spattering from a substrate in rotation, on the side of a substrate held by said substrate holding part; each guide part comprising: (d-1) a first processing liquid guide part to receive pure water flying spattering from a substrate in rotation; and (d-2) a plurality of second processing liquid guide parts that are stacked in multistage on said first processing liquid guide part and receive a second processing liquid flying spattering from a substrate in rotation; (e) a plurality of processing liquid passages of substantially annulus ring shape that are provided to said plurality of guide parts in one-to-one correspondence and feed downwardly a processing liquid introduced from their corresponding guide parts; and (f) a position adjusting part to adjust the physical relationship between said substrate held by said substrate holding part and each of said guide parts, such that a processing liquid flying spattering from a substrate in rotation is received by a guide part corresponding to the recovery type of the processing liquid; (g) a plurality of first recovery tanks of doughnut-like shape corresponding to said second processing liquid guide parts so as to recover, through said processing liquid passages, a second processing liquid flying spattering from said substrate by rotation; (h) a plurality of storage parts that are located separately below said plurality of first recovery tanks so as to correspond to said plurality of first recovery tanks, respectively, each storage part including: (h-1) a storage tank having a doughnut-like shape that is approximately the same as internal space shape of the corresponding said first recovery tank; and (h-2) a plurality of pipes to connect in communication at a plurality of locations between the bottom of said corresponding said first recovery tank and the inside of said storage tank; (i) a second recovery tank corresponding to said first processing liquid guide part so as to recover, through a processing liquid passage, said pure water flying spattering from said substrate by rotation; and (j) a discharge pipe through which said pure water recovered in said second recovery tank is discharged and discarded to the exterior, and wherein an outer guard forming at least the lowermost second processing liquid guide part in said plurality of second processing liquid guide parts includes: a first cylindrical part arranged coaxially with said substrate holding part; an inclined part extending obliquely downwardly toward said substrate holding part from the lower end of said first cylindrical part; and a second cylindrical part extending vertically downwardly from the lower end of said inclined part; and an internal diameter of said first cylindrical part forming the lowermost second processing liquid guide part in said plurality of second processing liquid guide parts is greater than an internal diameter of said second cylindrical part forming a processing liquid passage corresponding to said lowermost second processing liquid guide part, and said storage tanks contained in each of said plurality of storage parts are stacked one upon another substantially vertically.