摘要:
A silicon-germanium non-formation region not formed with a silicon germanium layer and a silicon-germanium formation region formed with a silicon germanium layer are provided in a silicon chip, an internal circuit and an input/output buffer are arranged in the silicon-germanium formation region, and a pad electrode and an electrostatic protection element are arranged in the silicon-germanium non-formation region.
摘要:
According to this invention, there is provided a method of manufacturing a compound semiconductor which can be formed at a high yield and in which variations in characteristics of elements caused by variations in distances between a source and a gate and between a drain and the gate can be minimized. In addition, there is provided a compound semiconductor device having a structure capable of increasing a power gain and obtaining a high-speed operation. According to this invention, an active layer is formed on a compound semi-conductor substrate, and source/drain electrodes are formed on the active layer to be separated from each other. The wall insulating films are respectively formed on side walls of the electrodes, and a gate electrode is formed between the side wall insulating films to be respectively in contact therewith.
摘要:
A mold for molding a semiconductor package including a semiconductor chip mounted on a lead frame, wherein a major surface of the semiconductor chip is inclined relative to a surface of the semiconductor package, the mold includes a first mold half including a first mold cavity having a first mold surface and at least four first side surfaces, a second mold half including a second mold cavity having a second main surface extending substantially parallel to the first main surface and at least four second side surfaces extending substantially perpendicular to the second main surface, and a portion for supporting the lead frame and the semiconductor chip in the first and second mold cavities and position the major surface of the semiconductor chip in an inclined position relative to the second main surface, wherein the portion for supporting and positioning includes a first mating surface on the first mold half inclined relative to the first main surface and a second mating surface on the second mold half inclined relative to the second main surface.
摘要:
A silicon-germanium non-formation region not formed with a silicon germanium layer and a silicon-germanium formation region formed with a silicon germanium layer are provided in a silicon chip, an internal circuit and an input/output buffer are arranged in the silicon-germanium formation region, and a pad electrode and an electrostatic protection element are arranged in the silicon-germanium non-formation region.
摘要:
An integrated circuit including a wafer having a GaAs substrate, an un-doped GaAs layer, and a GaAs active layer. This active layer may have an HEMT structure to improve its operation speed. Also, the substrate may a multi-layer structure to form a three dimensional capacitor. At least one mesa portion is formed on the substrate by removing a portion of the un-doped GaAs layer and GaAs active layer. A source electrode, for example, is formed on the mesa portion, and a ground electrode is formed on an exposed surface of the substrate. These electrodes are connected to each other by means of a wiring metal layer. As a result, the source electrode is easily grounded without using a long bonding wire.
摘要:
A highly magnetic Hall element comprising a substrate, a Hall element chip mounted on the substrate, and a magnetic member interposed between the substrate and the chip. The magnetic member increases the coercive force of the element, and is formed by laminating resin layers mixed with powder having a high magnetic permeability, one upon another, by stencil printing on that side of a semiconductor wafer in which a Hall element is mounted. The wafer and the magnetic member are diced together, to provide a Hall element chip. The magnetic member formed on the Hall element chip is adhered to substrate, with half-cured surface put in contact with the substrate.