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US 10,478,984 B2Granted
Chemically sharpening blades
AssigneeHutchinson Technology Incorporated
InventorsPaul V. Pesavento, Peter F. Ladwig, Michael W. Davis, John A. Theget, Kurt C. Swanson, Joel B. Michaletz, Philip W. Anderson, Timothy A. McDaniel
Life of this patent
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Abstract
A method for forming a cutting tool includes masking a metal base with one or more masks, the one or more masks including at least one variable permeability mask, and chemically etching the masked metal base to form a blade of the cutting tool.
Claims12
A method for forming a metal base, the method comprising
- applying a first mask and a second mask to a first side of the metal base to form a first window between the first mask and the second mask;
- applying a third mask and a fourth mask to a second side of the metal base to form a second window between the third mask and the fourth mask;
- applying a first variable permeability mask adjacent to the third mask of the second side of the metal base;
- and
- chemically etching the metal base at the first window and the second window in a first stage to form a first void on the first side and a second void on the second side.
2 more elements
Dependencies are inferred from the claim text.