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Technology Stocks : PLASMA THERM (PTIS)
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To: C. Shivery who wrote (276)12/24/1997 11:21:00 AM
From: C. Shivery  Read Replies (1) of 509
 
Dry Etching.

The most common form of dry etching for micromachining applications is reactive ion etching (RIE). Ions are accelerated towards the material to be etched, and the etching reaction is enhanced in the direction of travel of the ion. RIE is an anisotropic etching technique. Deep trenches and pits (up to ten or a few tens of microns) of arbitrary shape and with vertical walls can be etched in a variety of materials including silicon, oxide and nitride. Unlike anisotropic wet etching, RIE is not limited by the crystal planes in the silicon.
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