Patent
Microelectronic variable inductor
Knutson W J,Daniel Martin Smith +1 more
TLDR
In this paper, the authors proposed a method for selectively open circuiting a portion of the cnductor by a laser beam which does not substantially heat the structure, with the heat which is produced being highly localized.Abstract:
A conductor provided on an insulating support has a portion which forms an inductor. Various components are connected to the conductor, as by soldering, to provide an electronic circuit suitable for a particular application. The conductor portion which forms the inductor has parallel branches and the value of the inductance can be changed by selectively open circuiting the branches. This can be accomplished after the components are connected and the complete circuit is tested to determine whether a change in the inductance value is required. The branches can be selectively open circuited by removing a portion of the cnductor by a laser beam which does not substantially heat the structure, with the heat which is produced being highly localized. Accordingly, this does not soften the solder connections of the components and there is no damaging effect on the circuit. The inductor portion as described can be connected in series with a coil, and the total inductance value of the coil and the conductor can be adjusted by cutting sections from the parallel branches to thereby provide the total inductance value required in a particular circuit application.read more
Citations
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References
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Patent
Thin-film resistors
TL;DR: In this paper, a resistive thin film is formed on a substrate by cathodic sputtering, reactive sputtering or vacuum evaporation, and the substrate may be of one of a number of metals, or compounds thereof.
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