Mounting circuit substrate
AssigneeMitsubishi Electric Corporation
InventorKeiichi Kawashima
Life of this patent
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Abstract
A semiconductor package containing a field effect transistor (FET) used in a high frequency band includes a mounting circuit substrate on which the semiconductor device is mounted. The mounting circuit substrate has a gate wiring conductor, a drain wiring conductor, and a source wiring conductor, which are connected to the gate electrode, the drain electrode, and the source electrode, respectively, of the semiconductor device. The gate wiring conductor and the drain wiring conductor extend toward each other so that their adjacent or facing ends are in close proximity to each other, thereby increasing the capacitance between the gate wiring conductor and the drain wiring conductor.
Claims7
A circuit comprising:
- a high frequency semiconductor device having a gate electrode, a source electrode, and a drain electrode;
- a substrate body having a top surface having a mounting region on which said high frequency semiconductor device is mounted;
- a gate wiring conductor having a connecting portion at which said gate wiring conductor is electrically connected to said gate electrode of said high frequency semiconductor device, said connecting portion of said gate wiring conductor being located in said mounting region of said substrate body;
- and
- a drain wiring conductor having a connecting portion at which said drain wiring conductor is electrically connected to said drain electrode of said high frequency semiconductor device, said connecting portion of said drain wiring conductor being located in said mounting region of said substrate body and spaced a predetermined distance from an edge of said connecting portion of said gate wiring conductor, wherein capacitance between said connecting portion of said gate wiring conductor and said connecting portion of said drain wiring conductor resonates with reactive electrical components of said high frequency semiconductor device so that power gain as a function of frequency of said high frequency semiconductor device has a hump at a frequency in an operating frequency band of said high frequency semiconductor device.
Dependencies are inferred from the claim text.