Abstract: The specification discloses a patterned thickness article, a patterned injection molding, and a method for manufacturing the article. The injection molding has patterned internal surface including high-flow channels and a plurality of intermediate and/or lower-flow channels having varying cross-sectional areas within the injection molding. The method includes providing such an injection molding; providing a flow of molten material through a sprue and into the high-flow channels; creating a flow front in the injection molding that advances from the sprue along the high-flow channels and the intermediate and/or lower-flow channels; and applying a clamping pressure to said injection molding.