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Class Information
Number: 257/E21.544
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 devices consisting of plurality of solid-state components formed in or on common substrate or of parts thereof; manufacture of integrated circuit devices or of parts thereof (epo) > Manufacture of specific parts of devices (epo) > Making of isolation regions between components (epo) > Pn junction isolation (epo)
Description: This subclass is indented under subclass E21.54. This subclass is substantially the same in scope as ECLA classification H01L21/761.










Patents under this class:
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Patent Number Title Of Patent Date Issued
4520448 Method of characterizing reliability in bipolar semiconductor devices May. 28, 1985
4512816 High-density IC isolation technique capacitors Apr. 23, 1985
4511413 Process for forming an IC wafer with buried Zener diodes Apr. 16, 1985
4505759 Method for making a conductive silicon substrate by heat treatment of oxygenated and lightly doped silicon single crystals Mar. 19, 1985
4496849 Power transistor protection from substrate injection Jan. 29, 1985
4494134 High voltage semiconductor devices comprising integral JFET Jan. 15, 1985
4486770 Isolated integrated circuit transistor with transient protection Dec. 4, 1984
4476480 High withstand voltage structure of a semiconductor integrated circuit Oct. 9, 1984
4466171 Method of manufacturing a semiconductor device utilizing outdiffusion to convert an epitaxial layer Aug. 21, 1984
4466011 Device for protection against leakage currents in integrated circuits Aug. 14, 1984
4416055 Method of fabricating a monolithic integrated circuit structure Nov. 22, 1983
4403395 Monolithic integration of logic, control and high voltage interface circuitry Sep. 13, 1983
4404048 Semiconductor device manufacture Sep. 13, 1983
4395723 Floating substrate dynamic RAM cell with lower punch-through means Jul. 26, 1983
4388632 Signal limiting integrated circuit Jun. 14, 1983
4384299 Capacitor memory and methods for reading, writing, and fabricating capacitor memories May. 17, 1983
4381957 Method of diffusing aluminum May. 3, 1983
4379726 Method of manufacturing semiconductor device utilizing outdiffusion and epitaxial deposition Apr. 12, 1983
4371406 Solid-state device Feb. 1, 1983
4369561 Process for aligning diffusion masks with respect to isolating walls of coffers in integrated circuits Jan. 25, 1983
4368524 Semiconductor device Jan. 11, 1983
4362574 Integrated circuit and manufacturing method Dec. 7, 1982
4362599 Method for making semiconductor device Dec. 7, 1982
4336528 Semiconductor resistive network Jun. 22, 1982
4325180 Process for monolithic integration of logic, control, and high voltage interface circuitry Apr. 20, 1982
4311532 Method of making junction isolated bipolar device in unisolated IGFET IC Jan. 19, 1982
4297717 Semiconductor device Oct. 27, 1981
4297654 Crystal oscillator including a MOS-capacitor Oct. 27, 1981
4295898 Method of making isolated semiconductor devices utilizing ion-implantation of aluminum and heat treating Oct. 20, 1981
4281448 Method of fabricating a diode bridge rectifier in monolithic integrated circuit structure utilizing isolation diffusions and metal semiconductor rectifying barrier diode formation Aug. 4, 1981
4278987 Junction isolated IC with thick EPI portion having sides at least 20 degrees from (110) orientations Jul. 14, 1981
4276556 Semiconductor device Jun. 30, 1981
4266233 I-C Wafer incorporating junction-type field-effect transistor May. 5, 1981
4266100 Monolithically integrated semiconductor circuit May. 5, 1981
4260999 Semiconductor device and method of making the same Apr. 7, 1981
4259730 IIL With partially spaced collars Mar. 31, 1981
4258379 IIL With in and outdiffused emitter pocket Mar. 24, 1981
4246594 Low crosstalk type switching matrix of monolithic semiconductor device Jan. 20, 1981
4240096 Fluorine-doped P type silicon Dec. 16, 1980
4237473 Gallium phosphide JFET Dec. 2, 1980
4233618 Integrated circuit with power transistor Nov. 11, 1980
4231057 Semiconductor device and method for its preparation Oct. 28, 1980
4231055 Complementary MOS transistors without an isolation region Oct. 28, 1980
4223335 Semiconductor device body having identical isolated composite resistor regions Sep. 16, 1980
4219373 Method of fabricating a semiconductor device Aug. 26, 1980
4214252 Semiconductor device having a MOS-capacitor Jul. 22, 1980
4213806 Forming an IC chip with buried zener diode Jul. 22, 1980
RE30282 Double master mask process for integrated circuit manufacture May. 27, 1980
4188245 Selective open tube aluminum diffusion Feb. 12, 1980
4187514 Junction type field effect transistor Feb. 5, 1980

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