Patent ID: 9694453
Date: 2017-07-04
CPC Classifications: B08B,B23P,H01L,Y10T

Claim:
1. A method for making a chemical head for use proximate to a substrate surface to be processed, comprising: forming a plurality of first return conduits from an upper meniscus confinement surface, the upper meniscus confinement surface extending between a first upper step structure and a second upper step structure, the first upper step structure located at a leading edge of the upper meniscus confinement surface relative to a direction of movement of the substrate surface to be processed, the first upper step structure having a leading edge relative to the direction of movement of the substrate surface to be processed, the second upper step structure located at a trailing edge of the upper meniscus confinement surface relative to the direction of movement of the substrate surface to be processed; and forming a plurality of second return conduits from a lower meniscus confinement surface, the lower meniscus confinement surface extending between a first lower step structure and a second lower step structure, the first lower step structure located at the leading edge of the upper meniscus confinement surface relative to the direction of movement of the substrate surface to be processed, the first lower step structure having a leading edge relative to the direction of movement of the substrate surface to be processed, the leading edge of the first lower step structure offset from the leading edge of the first upper step structure relative to the direction of movement of the substrate surface to be processed, the second lower step structure located at the trailing edge of the upper meniscus confinement surface relative to the direction of movement of the substrate surface to be processed, wherein each of the upper meniscus confinement surface and the lower meniscus confinement surface is substantially parallel to a reference plane, wherein at least one of the plurality of first return conduits and the plurality of second return conduits is formed at a first angle relative to the reference plane.