Abstract:
In a semiconductor device connected to a first optical waveguide, a phase modulation unit, and a second optical waveguide in this order and having an optical modulator guiding light in a first direction, the phase modulation unit includes: a semiconductor layer whose length in the first direction is larger than a width in a second direction orthogonal to the first direction and which is made of monocrystalline silicon; a core part serving as an optical waveguide region formed on the semiconductor layer, and extending in the first direction; a pair of slab parts arranged on both sides of the core part in the second direction; a first electrode coupled with one of the slab parts; and a second electrode coupled with the other of the slab parts. The core part has a p type semiconductor region and an n type semiconductor region extending in the first direction, and the second direction coincides with a crystal orientation of the semiconductor layer.
Abstract:
Disclosed is an optical semiconductor device which can be improved in light shift precision and restrained from undergoing a loss in light transmission. In this device, an inner side-surface of a first optical coupling portion of an optical coupling region and an inner side-surface of a second optical coupling portion of the region are increased in line edge roughness. This manner makes light coupling ease from a first to second optical waveguide. By contrast, the following are decreased in line edge roughness: an outer side-surface of the first optical coupling portion of the optical coupling region; an outer side-surface of the second optical coupling portion of the region; two opposed side-surfaces of a portion of the first optical waveguide, the portion being any portion other than the region; and two opposed side-surfaces of a portion of the second optical waveguide, the portion being any portion other than the region.
Abstract:
A SOP has a semiconductor chip. The chip includes a pair of a lower layer coil and an upper layer coil laminated through an interlayer insulating film formed therebetween, a first circuit unit electrically coupled to the upper layer coil, and a plurality of electrode pads. Further, it has a wire for electrically coupling the upper layer coil and the first circuit unit, a plurality of inner leads and outer leads arranged around the semiconductor chip, a plurality of wires for electrically coupling the electrode pads of the semiconductor chip and the inner leads, and a resin made sealing member for covering the semiconductor chip. The wire extends along the extending direction of the wires.
Abstract:
An object of the present invention is to suppress an error in the value detected by a pressure sensor, which may be caused when environmental temperature varies. A semiconductor substrate has a first conductivity type. A semiconductor layer is formed over a first surface of the semiconductor substrate. Each of resistance parts has a second conductivity type, and is formed in the semiconductor layer. The resistance parts are spaced apart from each other. A separation region is a region of the first conductivity type formed in the semiconductor layer, and electrically separates the resistance parts from each other. A depressed portion is formed in a second surface of the semiconductor substrate, and overlaps the resistance parts, when viewed planarly. The semiconductor layer is an epitaxial layer.
Abstract:
A memory card includes a memory that stores data, a driver that transmits the data received from the memory, and at least one transmitter that transmits the data received from the driver to a receiver provided in an external main unit. The driver and the transmitter are provided in a single IC (Integrated Circuit) chip and are not overlapped with each other in planar view, and the transmitter includes a coil
Abstract:
A memory card includes a memory that stores data, a driver that transmits the data received from the memory, and at least one transmitter that transmits the data received from the driver to a receiver provided in an external main unit. The driver and the at least one transmitter are provided in a single IC (integrated circuit) chip and are not overlapped with each other in a planar view.
Abstract:
A buried layer of a second conductivity type and a lower layer of a second conductivity type are formed in a drift layer. A boundary insulating film is formed in the boundary between the lateral portion of the buried layer of a second conductivity type and the drift layer. The lower layer of a second conductivity type is in contact with the lower end of the buried layer of a second conductivity type and the lower end of the boundary insulating film. The buried layer of a second conductivity type is electrically connected to a source electrode. A high-concentration layer of a second conductivity type is formed in the surface layer of the buried layer of a second conductivity type.
Abstract:
A semiconductor device includes a substrate, an internal circuit including a plurality of transistors provided over the substrate, an insulating film provided over the substrate, a bonding pad provided over the insulating film, an inductor being formed in the insulating film, the inductor carrying out a signal transmission/reception to/from an external device in a non-contact manner by an electromagnetic induction and being electrically coupled to the internal circuit. The inductor includes a first conducting layer, and the bonding pad includes a second conducting layer. The first conducting layer includes a lower level layer than the second conducting layer in a thickness direction of the substrate. In a plan view, the inductor includes a first portion overlapping the bonding pad and a second portion not overlapping the bonding pad.
Abstract:
A circuit device includes a semiconductor substrate, a first inductor provided over the semiconductor substrate, and a second inductor provided over the semiconductor substrate and coupled to the first inductor. The first inductor and second inductor are wound in a same direction with each other from respective inner end portions to respective outer end portions thereof.
Abstract:
A semiconductor device includes a semiconductor chip having a multilayer interconnect, a first spiral inductor formed in the multilayer interconnect, and a second spiral inductor formed in the multilayer interconnect. The first spiral inductor and the second spiral inductor collectively include a line, the line being spirally wound in a first direction in the first spiral inductor toward outside of the first spiral inductor, and being spirally wound in a second direction in the second spiral inductor toward inside of the second spiral inductor. The first direction and the second direction are opposite directions.