Transformer
AssigneeOki Electric Industry Co., Ltd.
InventorTetsuo Katayanagi
Life of this patent
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Abstract
The invention provides a transformer suitable for use in a high frequency semiconductor device, and the transformer can be formed without the use of a conventional core and coils by forming at least two spiral inductors selected from a plurality of spiral inductors on a semiconductor substrate so as to overlap each other substantially in the vertical direction with an interlayer insulator interposed in between.
Claims10
A transformer comprising a plurality of spiral inductors formed on a semiconductor substrate, wherein at least two spiral inductors selected from the plurality of the spiral inductors are formed so as to partially overlap each other with an interlayer insulator interposed therebetween, and wherein each of the at least two spiral inductors has output terminals and the output terminals are at ends of the at least two spiral inductors which non-overlap each other.
A transformer comprising
- a semiconductor substrate;
- a first spiral inductor formed on the semiconductor substrate, the first spiral inductor having output terminals at ends thereof,
- a second spiral inductor partially overlapping the first spiral inductor and having output terminals at ends thereof, the second spiral inductor being laterally displaced relative to the first spiral inductor so as to be partially nonoverlapping with the first spiral inductor, the ends of the second spiral inductor being non-overlapping with the ends of the first spiral inductor;
- and
- an interlayer insulator interposed between the first and second spiral insulators.
A transformer, comprising:
- a semiconductor substrate;
- a first spiral inductor formed on the semiconductor substrate, the first spiral inductor having an input terminal at an end thereof;
- a second spiral inductor partially overlapping the first spiral inductor, and laterally displaced relative to the first spiral inductor so as to be partially nonoverlapping with the first spiral inductor, the second spiral inductor having an output terminal at an end thereof;
- and
- an interlayer insulator interposed between the first and second spiral insulators;
- wherein the first and second spiral inductors each have a rectangular shape, each having opposing, longitudinally extending, first and second longer sides, the first longer sides of the first and second spiral inductors being vertically aligned so as to partially overlap, the second longer sides of the first and second spiral inductors being vertically aligned so as to partially overlap, the second spiral inductor being displaced longitudinally relative to the first spiral inductor so that the first longer sides of the first and second spiral inductors are partially nonoverlapping and the second longer sides of the first and second spiral inductors are partially nonoverlapping.
Dependencies are inferred from the claim text.