(57) Hair removal devices comprising a plurality of micro-blades and/or abrasion elements
(14,24,30,41,42,43,44) and methods for their fabrication, including microelectronic
manufacturing techniques. Preferred "blades" (15,25,35,55,75,76,85,86,96,106,186)
have an edge with a radius of curvature not greater than about 1000 angstroms, preferably
not greater than about 500 angstroms. Alternative embodiments of the present invention
comprise a relatively high number of abrasion elements for hair removal. Shaving devices
of this invention can comprise skin flow control elements which control the angle
at which the blade edges or abrasion elements contact the hair.
Another aspect of the present invention comprises blades having cutting depth which
are much smaller than previously known shaving devices, for example not greater than
about 75 microns, or even less.
Shaving devices are formed on rigid or flexible substrates (21,100,110,120,130,170,189)
using one or more of the following techniques: photolithography, wet chemical etching,
dry etching, or material deposition techniques.
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