Method for preparation of edged medical tool

Details Method for preparation of edged medical tool Method for preparation of edged medical tool

1989-04-21

1990-12-25

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

30346, 156646, 156655, 252 791, 427 38, 606167, B44C 122, C03C 1500, C03C 2506

Patent

active

049800213

ABSTRACT:
An edged medical tool, such as scalpels and injection needles, is imparted with unexpectedly improved incisiveness by first providing a carbonaceous coating layer of 1 to 20 nm thickness having a crystalline structure of diamond by a method of plasma-induced vapor-phase deposition in an atmosphere of a mixture of hydrogen gas and a hydrocarbon gas at a microwave frequency of 1 to 10 GHz and then etching the thus formed diamond-like coating layer in a plasma of hydrogen gas to such an extent that the thus etched surface has a roughness of 0.5 to 5 nm.

REFERENCES:
patent: 3791852 (1974-02-01), Bunshah
patent: 4416912 (1983-11-01), Bache
patent: 4504519 (1985-03-01), Zelez
patent: 4534827 (1985-08-01), Henderson
patent: 4629373 (1986-12-01), Hall
patent: 4839195 (1989-06-01), Kitamura et al.

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