RF AMPLIFIER WITH CONDUCTOR-LESS REGION UNDERLYING FILTER CIRCUIT INDUCTOR, AND METHODS OF MANUFACTURE THEREOF

摘要

An amplifier includes a semiconductor substrate. A first conductive feature partially covers the bottom substrate surface to define a conductor-less region of the bottom substrate surface. A first current conducting terminal of a transistor is electrically coupled to the first conductive feature. Second and third conductive features may be coupled to other regions of the bottom substrate surface. A first filter circuit includes an inductor formed over a portion of the top substrate surface that is directly opposite the conductor-less region. The first filter circuit may be electrically coupled between a second current conducting terminal of the transistor and the second conductive feature. A second filter circuit may be electrically coupled between a control terminal of the transistor and the third conductive feature. Conductive leads may be coupled to the second and third conductive features, or the second and third conductive features may be coupled to a printed circuit board.

主权项

1. An amplifier comprising:
a semiconductor substrate having a top substrate surface and a bottom substrate surface; a first conductive feature coupled to the bottom substrate surface, wherein the first conductive feature only partially covers the bottom substrate surface to define a first conductor-less region that spans a first portion of the bottom substrate surface; a first transistor formed at the top substrate surface, wherein the first transistor includes a first control terminal, a first current conducting terminal, and a second current conducting terminal, wherein the first current conducting terminal is electrically coupled to the first conductive feature; and a first filter circuit electrically coupled to the second current conducting terminal, wherein the first filter circuit includes a first inductor formed over a portion of the top substrate surface that is directly opposite the first conductor-less region.