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Class Information
Number: 257/E21.225
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Processes or apparatus adapted for manufacture or treatment of semiconductor or solid-state devices or of parts thereof (epo) > Manufacture or treatment of semiconductor device (epo) > Device having at least one potential-jump barrier or surface barrier, e.g., pn junction, depletion layer, carrier concentration layer (epo) > Device having semiconductor body comprising group iv elements or group iii-v compounds with or without impurities, e.g., doping materials (epo) > Treatment of semiconductor body using process other than deposition of semiconductor material on a substrate, diffusion or alloying of impurity material, or radiation treatment (epo) > To change their surface-physical characteristics or shape, e.g., etching, polishing, cutting (epo) > Chemical or electrical treatment, e.g., electrolytic etching (epo) > Chemical cleaning (epo) > Cleaning diamond or graphite (epo)
Description: This subclass is indented under subclass E21.224. This subclass is substantially the same in scope as ECLA classification H01L21/306N8.

Patents under this class:

Patent Number Title Of Patent Date Issued
7327000 Patterned thin film graphite devices and method for making same Feb. 5, 2008
5500393 Method for fabricating a schottky junction Mar. 19, 1996
5403436 Plasma treating method using hydrogen gas Apr. 4, 1995
5213622 Cleaning agents for fabricating integrated circuits and a process for using the same May. 25, 1993

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