Semiconductors devices adapted for rectifying, amplifying, oscillating, or switching, capacitors, or resistors with at least one potential-jump barrier or surface barrier (epo) > Electrical characteristics due to properties of entire semiconductor body rather than just surface region (epo) > Characterized by specified shape or size of pn junction or by specified impurity concentration gradient within the device (epo) > With semiconductor regions connected to electrode carrying current to be rectified, amplified or switched and such electrode being part of semiconductor device which comprises three or more electrodes (epo) > Patents

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Class Information
Number: 257/E29.029
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Semiconductors devices adapted for rectifying, amplifying, oscillating, or switching, capacitors, or resistors with at least one potential-jump barrier or surface barrier (epo) > Electrical characteristics due to properties of entire semiconductor body rather than just surface region (epo) > Characterized by specified shape or size of pn junction or by specified impurity concentration gradient within the device (epo) > With semiconductor regions connected to electrode carrying current to be rectified, amplified or switched and such electrode being part of semiconductor device which comprises three or more electrodes (epo)
Description: This subclass is indented under subclass E29.005. This subclass is substantially the same in scope as ECLA classification H01L29/08.

Sub-classes under this class:

Class Number	Class Name	Patents
257/E29.036	Anode or cathode regions of thyristors or gated bipolar-mode devices (epo)	8
257/E29.034	Collector regions of bipolar transistors (epo)	248
257/E29.03	Emitter regions of bipolar transistors (epo)	216
257/E29.039	Source or drain regions of field-effect devices (epo)	48
257/E29.042	Tunneling barrier (epo)	50

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7417302	Semiconductor device and method of manufacturing the same	Aug. 26, 2008
7355258	Method and apparatus for bending electrostatic switch	Apr. 8, 2008
7332811	Integrated circuit interconnect	Feb. 19, 2008
5426326	Semiconductor device including arrangement for reducing junction degradation	Jun. 20, 1995
4728844	Piezoelectric transducer and components therefor	Mar. 1, 1988
4103245	Transistor amplifier for low level signal	Jul. 25, 1978