Abstract:
A semiconductor device includes: a substrate region; a gate electrode, a source electrode, and a drain electrode which are placed on a first surface of the substrate regions; an active area between gate and source placed between the gate electrode and the source electrode; an active area between gate and drain placed between the gate electrode and the drain electrode; an active area placed on the substrate region of the underneath part of the gate electrode, the source electrode, and the drain electrode; and a non-active area placed adjoining the active area, the active area between gate and source, and the active area between gate and drain. Furthermore, width W A1 of the active area between gate and source is wider than width W A2 of the active area between gate and drain. Channel resistance of an active area between source and gate placed between a gate electrode and a source electrode is reduced, and high-frequency performance is provided.
Abstract:
A radio frequency semiconductor device package (5) includes a metal base plate (30), a first metal wall (10), a second metal wall (20), and feed-through parts (50). The first metal wall (10) is provided with first and second openings (10a) and connected onto the metal base plate (30). The first and second openings (10a) are set back from a lower surface side of the first metal wall (10) and do not reach an upper surface (10c) of the first metal wall (10). The second metal wall (20) is connected to the upper surface (10c) of the first metal wall (10). Thickness of the second metal wall (20) is larger than thickness of the first metal wall (10). The feed-through parts (50) include insulators and line patterns (54) insulated from the first and second metal walls and are joined to inner walls of the openings (10a) and the metal base plate (30).
Abstract:
A semiconductor device comprising: a substrate; a gate electrode, a source electrode, and a drain electrode which are placed on a first surface of the substrate, and have a plurality of fingers, respectively; a gate terminal electrode, a source terminal electrode, and a drain terminal electrode which are placed on the first surface of the substrate, and ties a plurality of fingers, respectively for every the gate electrode, the source electrode, and the drain electrode; an active area placed on the substrate under the gate electrode, the source electrode, and the drain electrode; a non-active area placed on the substrate where the active area is not placed under the gate electrode, the source electrode, and the drain electrode; and a via hole connected to the source terminal electrode, wherein, the active area is divided in a manner of a stripe shape extended in a first direction, and the gate electrodes are formed as fishbone placement, and a gate bus line of the concerned fishbone placement is placed on the non-active area of the stripe shape between the active areas extended in the first direction, and each of a plurality of gate finger electrodes are connected to the gate bus line and the drain electrode is also formed as fishbone placement, and each of a plurality of the drain finger electrodes are connected to a drain bus line extended in the first direction and connected to the drain terminal electrode.
Abstract:
According to one embodiment, there is a semiconductor device including a first active element, a second active element connected in parallel with the first active element, and a first stabilization circuit connected between a gate of the first active element and a gate of the second active element and configured with a parallel circuit of a gate bypass resistor, a gate bypass capacitor, and a gate bypass inductor, the first stabilization circuit having a resonant frequency equal to an odd mode resonant frequency.
Abstract:
A high frequency semiconductor device (25) includes: a field effect transistor (24) including gate terminal electrodes (G1-G10), source terminal electrodes (S1-S11), and a drain terminal electrode (D); an input circuit pattern (17) and an output circuit pattern (18) which are disposed adjoining of the field effect transistor; a plurality of input bonding wires (12,12L) configured to connect the plurality of the gate terminal electrodes (G1-G10) and the input circuit pattern (17); and a plurality of output bonding wires (14,14L) configured to connect the drain terminal electrode (D) and the output circuit pattern (18), whereby the input/output signal phase is matched by adjusting an inductance distribution of a plurality of input/output bonding wires, and whereby gain and output power is improved, and whereby an oscillation due to unbalanced operation of each FET cell is supressed.
Abstract:
A semiconductor device and a fabrication method of the semiconductor device, the semiconductor device including: a gate electrode, a source electrode, and a drain electrode which are placed on a first surface of a substrate, and have a plurality of fingers; a gate terminal electrode, a source terminal electrode, and the drain terminal electrode which governed and formed a plurality of fingers for every the gate electrode, the source electrode, and the drain electrode; an active area placed on an underneath part of the gate electrode, the source electrode, and the drain electrode, on the substrate between the gate electrode and source electrode, and on the substrate between the gate electrode and the drain electrode; a sealing layer which is placed on the active area, the gate electrode, the source electrode, and the drain electrode through a cavity part, and performs a hermetic seal of the active area, the gate electrode, the source electrode, and the drain electrode. Accordingly, the semiconductor element itself can have air-tightness, it is not necessary to cover the gate electrode surface with a damp-proof protective film, gate capacitance of the semiconductor element is reduced, and high frequency characteristics and gain of the semiconductor element improve.
Abstract:
A microwave semiconductor amplifier includes a semiconductor amplifier element (14), an input matching circuit (12) and an output matching circuit (20). The semiconductor amplifying element (14) includes an input electrode and an output electrode and has a capacitive output impedance. The input matching circuit (12) is connected to the input electrode. The output matching circuit (20) includes a bonding wire (15) and a first transmission line (16). The bonding wire (15) includes first and second end portions. The first end portion is connected to the output electrode. The second end portion is connected to one end portion of the first transmission line (16). A fundamental impedance and a second harmonic impedance seen toward the external load change toward the one end portion. The second harmonic impedance at the one end portion has an inductive reactance. The output matching circuit (20) matches the capacitive output impedance of the semiconductor amplifying element (14) to the fundamental impedance of the external load.