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Class Information
Number: 257/E21.491
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 other than carbon, si, ge, sic, se, te, cu 2 o, cui, and group iii-v compounds with or without impurities, e.g., doping materials (epo) > Treatment of semiconductor body using process other than electromagnetic radiation (epo) > To change their surface-physical characteristics or shape, e.g., etching, polishing, cutting (epo) > To form insulating layer thereon, e.g., for masking or by using photolithographic techniques; post treatment of these layers (epo) > Post treatment of insulating layer (epo) > Doping layer (epo)
Description: This subclass is indented under subclass E21.489. This subclass is substantially the same in scope as ECLA classification H01L21/4757C.

Patents under this class:

Patent Number Title Of Patent Date Issued
8669169 Diffusion sources from liquid precursors Mar. 11, 2014

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