Cutting blades having pointed tip, ultra-sharp edges, and...

Details Cutting blades having pointed tip, ultra-sharp edges, and... Cutting blades having pointed tip, ultra-sharp edges, and...

2006-06-13

2006-06-13

Payer, Hwei-Siu (Department: 3724)

Cutlery

Blades

Metallurgical feature

C030S346530, C606S167000

Reexamination Certificate

active

07059054

ABSTRACT:
An apparatus and method for a cutting blade having a pointed tip and ultra-flat faces that intersect at ultra-sharp edges. The cutting blade is batch-fabricated on a standard {100} semiconductor mono-crystalline silicon wafer using conventional anisotropic wet etching silicon micromachining techniques as a pair of spaced-apart substantially parallel and planar top and bottom surfaces each formed in {100} planes of a {100} mono-crystalline silicon substrate with first and second mutually rotated cutting edges formed between the top and bottom surfaces of the substrate and substantially parallel thereto in adjacent {111} planes that form a first pointed tip at an intersection therebetween, and having third and fourth cutting edges formed between the top and bottom surfaces of the substrate and substantially parallel thereto in adjacent {110} planes with the third and fourth cutting edges forming different pointed intersections with the first and second mutually rotated cutting edges.

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patent: 2004/0186493 (2004-09-01), McWhorter et al.

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