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Class Information
Number: 257/537
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Integrated circuit structure with electrically isolated components > Passive components in ics > Including resistive element > Using specific resistive material
Description: Subject matter wherein the passive resistive element is a specific chemical element, compound, or composition.

Sub-classes under this class:

Class Number Class Name Patents
257/538 Polycrystalline silicon (doped or undoped) 314

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
4073971 Process of manufacturing terminals of a heat-proof metallic thin film resistor Feb. 14, 1978
4035757 Semiconductor device resistors having selected temperature coefficients Jul. 12, 1977
4032960 Anisotropic resistor for electrical feed throughs Jun. 28, 1977
3997411 Method for the production of a thin film electric circuit Dec. 14, 1976
3949275 Electric thin-film circuit and method for its production Apr. 6, 1976
3930304 Method and apparatus for selective burnout trimming of integrated circuit units Jan. 6, 1976

1 2 3 4 5 6 7 8

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