摘要:
A semiconductor device in which an inductance element formed in a resin package has stable characteristics, impedance matching is achieved easily, and the stability of high-frequency characteristics is improved, more particularly a semiconductor chip sealed within mold resin having a conductor lead extending from an inside of the mold resin to an outside. A portion of the conductor lead inside the mold resin forms an inductance element, at least a part of which is narrower than the external portion of the conductor outside the mold resin.
摘要:
A method for forming a via in a sapphire substrate with a laser machining system that includes an ultrafast pulsed laser source. The sapphire substrate is provided. Pulses of laser light are substantially focused to a beam spot on the first surface of the sapphire substrate such that each focused pulse of laser light ablates a volume of the sapphire substrate having a depth less than the substrate thickness. The beam spot of the focused laser light pulses is scanned over a via portion of the first surface of the sapphire substrate. The sapphire substrate is moved in a direction substantially normal to the first surface to control the volume of the sapphire substrate ablated by each pulse of laser light to be substantially constant. The pulsing and scanning steps are repeated until the via is formed extending from the first surface to the second surface of the sapphire substrate.
摘要:
A semiconductor integrated circuit device includes a HFET formed on part of a substrate made of sapphire and including a Group III-V nitride semiconductor layer, a dielectric film formed on the substrate to cover the top and side surfaces and upper corners of the Group III-V nitride semiconductor layer, a microstrip line formed with the dielectric film interposed between the substrate and the microstrip line, and a drain lead which is formed on part of the dielectric film and through which the HFET is electrically connected to the microstrip line.
摘要:
A semiconductor integrated circuit device includes a HFET formed on part of a substrate made of sapphire and including a Group III-V nitride semiconductor layer, a dielectric film formed on the substrate to cover the top and side surfaces and upper corners of the Group III-V nitride semiconductor layer, a microstrip line formed with the dielectric film interposed between the substrate and the microstrip line, and a drain lead which is formed on part of the dielectric film and through which the HFET is electrically connected to the microstrip line.
摘要:
A method for forming a via in a sapphire substrate with a laser machining system that includes an ultrafast pulsed laser source. The sapphire substrate is provided. Pulses of laser light are substantially focused to a beam spot on the first surface of the sapphire substrate such that each focused pulse of laser light ablates a volume of the sapphire substrate having a depth less than the substrate thickness. The beam spot of the focused laser light pulses is scanned over a via portion of the first surface of the sapphire substrate. The sapphire substrate is moved in a direction substantially normal to the first surface to control the volume of the sapphire substrate ablated by each pulse of laser light to be substantially constant. The pulsing and scanning steps are repeated until the via is formed extending from the first surface to the second surface of the sapphire substrate.
摘要:
A semiconductor device includes a semiconductor layer stack 13 formed on a substrate 11 and having a channel region, a first electrode 16A and a second electrode 16B formed spaced apart from each other on the semiconductor layer stack 13, a first gate electrode 18A formed between the first electrode 16A and the second electrode 16B, and a second gate electrode 18B formed between the first gate electrode 18A and the second electrode 16B. A first control layer 19A having a p-type conductivity is formed between the semiconductor layer stack 13 and the first gate electrode 18A.
摘要:
In a transistor, an AlN buffer layer 102, an undoped GaN layer 103, an undoped AlGaN layer 104, a p-type control layer 105, and a p-type contact layer 106 are formed in this order on a sapphire substrate 101. The transistor further includes a gate electrode 110 in ohmic contact with the p-type contact layer 106, and a source electrode 108 and a drain electrode 109 provided on the undoped AlGaN layer 104. By applying a positive voltage to the p-type control layer 105, holes are injected into a channel to increase a current flowing in the channel.
摘要:
A nitride semiconductor device includes: a first semiconductor layer made of first nitride semiconductor; a second semiconductor layer formed on a principal surface of the first semiconductor layer and made of second nitride semiconductor having a bandgap wider than that of the first nitride semiconductor; a control layer selectively formed on, or above, an upper portion of the second semiconductor layer and made of third nitride semiconductor having a p-type conductivity; source and drain electrodes formed on the second semiconductor layer at respective sides of the control layer; a gate electrode formed on the control layer; and a fourth semiconductor layer formed on a surface of the first semiconductor layer opposite to the principal surface, having a potential barrier in a valence band with respect to the first nitride semiconductor and made of fourth nitride semiconductor containing aluminum.
摘要:
An acoustic resonator includes: a substrate; a resonator film which is supported above the main surface of the substrate and includes a piezoelectric film and a pair of a top electrode and a bottom electrode which are formed on part of the top surface and part of the bottom surface of the piezoelectric film, respectively, to face each other via the piezoelectric film; and a support which is formed on the main surface of the substrate to support the resonator film from below. A resonance cavity is provided in part of a region between the substrate and the resonator film below at least a portion of part of the resonator film where the top electrode and the bottom electrode coincide with each other and an isolation cavity is provided in other part of said region where the support and the resonance cavity do not exist.
摘要:
A semiconductor device has: a buffer layer formed on a conductive substrate and made of AlxGa1−xN with a high resistance; an element-forming layer formed on the buffer layer, having a channel layer, and made of undoped GaN and N-type AlyGa1−N; and a source electrode, a drain electrode and a gate electrode which are selectively formed on the element-forming layer. The source electrode is filled in a through hole provided in the buffer layer and the element-forming layer, and is thus electrically connected to the conductive substrate.
摘要翻译:半导体器件具有:形成在导电衬底上并具有高电阻的Al x Ga 1-x N的缓冲层; 形成在缓冲层上的元件形成层,具有沟道层,并由未掺杂的GaN和N型Al x Ga 1 -N构成; 以及选择性地形成在元件形成层上的源电极,漏电极和栅电极。 源电极被填充在设置在缓冲层和元件形成层中的通孔中,因此电连接到导电基板。