摘要:
On a semiconductor wafer, there are formed chip areas for storing memory areas, scribe areas for cutting the semiconductor wafer, pads for supplying electric signals from the outside in order to write data into the memory areas, and lead wires for electrically connecting the pads with the memory areas. The pads are formed within the scribe areas. After data has been written into the memory areas through the pads, the semiconductor wafer is cut along the scribe areas, thereby obtaining semiconductor chips. At the time of this cutting, the pads or the lead wires are cut.
摘要:
A reliable semiconductor device is provided which comprises lower and upper IGBTs 1 and 2 preferably bonded to each other by solder, and a wire strongly connected to lower IGBT 1. The semiconductor device comprises a lower IGBT 1, a lower electrode layer 5 secured on lower IGBT 1, an upper electrode layer 6 secured on lower electrode layer 5, an upper IGBT 2 secured on upper electrode layer 6, and a solder layer 7 which connects upper electrode layer 6 and upper IGBT 2. Lower and upper electrode layers 5 and 6 are formed of different materials from each other, and upper electrode layer 6 has a notch 36 to partly define on an upper surface 5a of lower electrode layer 5 a bonding region 15 exposed to the outside through notch 36 so that one end of a wire 8 is connected to bonding region 15. Upper electrode layer 6 can be formed of one material superior in soldering, and also, lower electrode layer 5 can be formed of another material having a high adhesive strength to wire 8.
摘要:
A semiconductor element (20) of the present invention includes a plurality of field effect transistors (90) and a schottky electrode (9a), and the schottky electrode (9a) is formed along an outer periphery of a region where the plurality of field effect transistors (90) are formed.
摘要:
A method of electroplating solder bumps on an integrated circuit substrate containing a plurality of active semiconductor devices in the substrate and a plurality of contact pads electrically connected to the active semiconductor devices, comprising the steps of: forming a plating base layer which electrically shorts the plurality of contact pads together, on the substrate; and electroplating solder bumps on the plating base layer by drawing plating current vertically through the substrate via a first plurality of parallel electrical paths formed by the plating base layer and the plurality of active semiconductor devices.
摘要:
In a semiconductor device such as a high-frequency power amplifier module, a plurality of amplifying means are formed on a semiconductor chip which is mounted on a main surface of a wiring substrate, and electrodes of the semiconductor chip are electrically connected by wires to electrodes of the wiring substrate. In order to make the high-frequency power amplifier module small in size, a substrate-side bonding electrode electrically connected to a wire set at a fixed reference electric potential is placed at a location farther from a side of the semiconductor chip than a substrate-side output electrode electrically connected to an output wire. A substrate-side input electrode electrically connected to an input wire is located at a distance from the side of the semiconductor chip about equal to the distance from the side of the semiconductor chip to the substrate-side output electrode, or at a location farther from the side of the semiconductor chip than the substrate-side bonding electrode is. Particularly, in a high-frequency power amplifier module provided with a semiconductor chip having multistage amplifying transistors on a wiring substrate: an angle formed by a first auxiliary line connecting bonding portions to each other at the two ends of an input bonding wire connecting a bonding input electrode for a specific one of the amplifying transistors to the wiring substrate and a second auxiliary line connecting bonding portions to each other at the two ends of an output bonding wire connecting an bonding output electrode for another amplifying transistor at a stage following the specific amplifying transistor to the wiring substrate is in the range 72 degrees to 180 degrees; and a gap between bonding portions of the bonding input electrode and the bonding output electrode is at least 0.3 mm but smaller than 0.8 mm. As a result, the high-frequency characteristic of the power amplifier module can be improved and the size thereof can be reduced.
摘要:
A method of manufacturing a semiconductor device includes: applying a paste containing acid to an electrical connection section which is electrically connected with a semiconductor substrate; removing the paste from the electrical connection section by washing the electrical connection section; and providing a conductive material to the electrical connection section.
摘要:
The invention relates to an ESD protective arrangement. An additional ESD diode (14) is provided between a powerbus (1) with a potential VSSP and a supply bus (8) with a potential VDDP for closing a protective path for negative charges between a substrate bus (2) with a substrate potential VSSB and the power bus (1) with the potential VSSP during an ESD stress.
摘要:
A nitride semiconductor light-emitting device includes a layered portion emitting light on a substrate. The layered portion includes an n-type semiconductor layer, an active layer, and a p-type semiconductor layer. The periphery of the layered portion is inclined, and the surface of the n-type semiconductor layer is exposed at the periphery. An n electrode is disposed on the exposed surface of the n-type semiconductor layer. This device structure can enhance the emission efficiency and the light extraction efficiency.
摘要:
A semiconductor switching circuit device includes a field effect transistor having a source (13), a gate electrode (17) and a drain electrode (15), a first electrode pad connected to the source electrode (13) or the drain electrode (15), and a second electrode pad connected to the source electrode (13) or the drain electrode (15) which is not connected to the first electrode pad (IN). The device also includes a third electrode pad receiving a DC voltage and applying the DC voltage to the field effect transistor, a first insulating layer (60) covering the field effect transistor, a metal layer (70) disposed above the first insulating layer (60) and connected to the third electrode pad, and a second insulating layer (80) disposed on the metal layer (70). The third electrode pad may be a control terminal pad, a ground terminal pad or a terminal pad receiving a constant DC power voltage. The metal layer (70) may be a flat sheet, a lattice or a comb-like structure.
摘要:
A high reliability package which includes electrical terminals (12,14) formed from an alloy of tungsten copper and brazed onto a surface of a ceramic substrate (10).