Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1984-08-16
1986-04-29
Page, Thurman K.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 451, 427 86, B05D 306
Patent
active
045856680
ABSTRACT:
A method for etching or chemically treating a surface of an article utilizing a radio frequency wave ion generating apparatus which provides a thin disk shaped plasma is described. The plasma disks can have a relatively large diameter (on the order of magnitude 50 centimeters). The plasma disks can be created without using a static magnetic field. The radio frequency waves are preferably microwaves or UHF. The method is particularly useful for ion or free radical irradiation of the surface provided in the plasma or for irradiation of the surface by ions accelerated outside a cavity containing the plasma. Disk plasmas are created over a wide pressure range (10.sup.-4 Torr to 1 atmosphere) and are highly ionized at low pressures. An apparatus adapted for treating a surface of an article with ions from a plasma is also described. The method and apparatus are preferably used for treating a surface forming part of an integrated circuit.
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Asmussen Jes
Reinhard Donnie K.
McLeod Ian C.
Michigan State University
Page Thurman K.
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