摘要:
Disclosed are a semiconductor device including a stepped gate electrode and a method of fabricating the semiconductor device. The semiconductor device according to an exemplary embodiment of the present disclosure includes: a semiconductor substrate having a structure including a plurality of epitaxial layers and including an under-cut region formed in a part of a Schottky layer in an upper most part thereof; a cap layer, a first nitride layer and a second nitride layer sequentially formed on the semiconductor substrate to form a stepped gate insulating layer pattern; and a stepped gate electrode formed by depositing a heat-resistant metal through the gate insulating layer pattern, wherein the under-cut region includes an air-cavity formed between the gate electrode and the Schottky layer.
摘要:
Disclosed are a semiconductor device including a stepped gate electrode and a method of fabricating the semiconductor device. The semiconductor device according to an exemplary embodiment of the present disclosure includes: a semiconductor substrate having a structure including a plurality of epitaxial layers and including an under-cut region formed in a part of a Schottky layer in an upper most part thereof; a cap layer, a first nitride layer and a second nitride layer sequentially formed on the semiconductor substrate to form a stepped gate insulating layer pattern; and a stepped gate electrode formed by depositing a heat-resistant metal through the gate insulating layer pattern, wherein the under-cut region includes an air-cavity formed between the gate electrode and the Schottky layer.
摘要:
Provided is a high-speed optical interconnection device. The high-speed optical interconnection device includes a first semiconductor chip, light emitters, optical detectors, and a second semiconductor chip, which are disposed on a silicon-on-insulator (SOI) substrate. The light emitters receive electrical signals from the first semiconductor chip to output optical signals. The optical detectors detect the optical signals to convert the optical signals into electrical signals. The second semiconductor chip receives the electrical signals converted by the optical detectors.
摘要:
Provided is a high-speed optical interconnection device. The high-speed optical interconnection device includes a first semiconductor chip, light emitters, optical detectors, and a second semiconductor chip, which are disposed on a silicon-on-insulator (SOI) substrate. The light emitters receive electrical signals from the first semiconductor chip to output optical signals. The optical detectors detect the optical signals to convert the optical signals into electrical signals. The second semiconductor chip receives the electrical signals converted by the optical detectors.
摘要:
Disclosed are a semiconductor device and a method of manufacturing the same. In the semiconductor device according to an exemplary embodiment of the present disclosure, at the time of forming a source electrode, a drain electrode, a field plate electrode, and a gate electrode on a substrate having a heterojunction structure such as AlGaN/GaN, the field plate electrode made of the same metal as the gate electrode is formed on the side surface of a second support part positioned below a head part of the gate electrode so as to prevent the gate electrode from collapsing and improve high-frequency and high-voltage characteristic of the semiconductor device.
摘要:
Disclosed are a semiconductor device and a method of manufacturing the same. In the semiconductor device according to an exemplary embodiment of the present disclosure, at the time of forming a source electrode, a drain electrode, a field plate electrode, and a gate electrode on a substrate having a heterojunction structure such as AlGaN/GaN, the field plate electrode made of the same metal as the gate electrode is formed on the side surface of a second support part positioned below a head part of the gate electrode so as to prevent the gate electrode from collapsing and improve high-frequency and high-voltage characteristic of the semiconductor device.
摘要:
A method of fabricating a T-gate is provided. The method includes the steps of: forming a photoresist layer on a substrate; patterning the photoresist layer formed on the substrate and forming a first opening; forming a first insulating layer on the photoresist layer and the substrate; removing the first insulating layer and forming a second opening to expose the substrate; forming a second insulating layer on the first insulating layer; removing the second insulating layer and forming a third opening to expose the substrate; forming a metal layer on the second insulating layer on which the photoresist layer and the third opening are formed; and removing the metal layer formed on the photoresist layer. Accordingly, a uniform and elaborate opening defining the length of a gate may be formed by deposition of the insulating layer and a blanket dry etching process, and thus a more elaborate micro T-gate electrode may be fabricated.
摘要:
A method of fabricating a T-gate is provided. The method includes the steps of: forming a photoresist layer on a substrate; patterning the photoresist layer formed on the substrate and forming a first opening; forming a first insulating layer on the photoresist layer and the substrate; removing the first insulating layer and forming a second opening to expose the substrate; forming a second insulating layer on the first insulating layer; removing the second insulating layer and forming a third opening to expose the substrate; forming a metal layer on the second insulating layer on which the photoresist layer and the third opening are formed; and removing the metal layer formed on the photoresist layer. Accordingly, a uniform and elaborate opening defining the length of a gate may be formed by deposition of the insulating layer and a blanket dry etching process, and thus a more elaborate micro T-gate electrode may be fabricated.
摘要:
A method of fabricating a T-gate is provided. The method includes the steps of: forming a photoresist layer on a substrate; patterning the photoresist layer formed on the substrate and forming a first opening; forming a first insulating layer on the photoresist layer and the substrate; removing the first insulating layer and forming a second opening to expose the substrate; forming a second insulating layer on the first insulating layer; removing the second insulating layer and forming a third opening to expose the substrate; forming a metal layer on the second insulating layer on which the photoresist layer and the third opening are formed; and removing the metal layer formed on the photoresist layer. Accordingly, a uniform and elaborate opening defining the length of a gate may be formed by deposition of the insulating layer and a blanket dry etching process, and thus a more elaborate micro T-gate electrode may be fabricated.
摘要:
A microwave power amplifier comprising a drive amplifying stage includes power elements, gate and drain bias circuits of the power elements, a RC parallel circuit connected between input port and gates of said power elements, a shunt resistor connected between ground terminal and said gates of power elements, and a negative feedback circuit connected in series with resistors and capacitors and in parallel with the power elements. An interstage matching circuit is connected in series with the drive amplifying stage; and a power amplifying stage including power elements connected in parallel with a power divider and a power coupler, gate and drain bias circuits of said power elements, a RC parallel circuit connected between the gates of power elements and the interstage matching circuit, and a shunt resistor connected between a ground and the gates of power elements.