Abstract:
A semiconductor device comprising a semiconductor substrate, a plurality of memory cell regions each having a plurality of memory cells disposed on the semiconductor substrate, a word line formed in a first level above the semiconductor substrate, a bit line formed in a second level above the first level, and a backing line having a lower resistance than the word line and formed in a third level above the second level. A dummy bit line is formed in the second level outside the memory cell region so as to reduce the step formed at the periphery of the memory cell region. The dummy bit line is also used to interconnect the word line and the backing line so that an electrical connection therebetween is stabilized.
Abstract:
A gallium nitride based semiconductor device is provided which includes a gallium nitride based semiconductor film with a flat c-plane surface provided on a gallium oxide wafer. A light emitting diode LED includes a gallium oxide support base 32 having a primary surface 32a of monoclinic gallium oxide, and a laminate structure 33 of Group III nitride. A semiconductor mesa of the laminate structure 33 includes a low-temperature GaN buffer layer 35, an n-type GaN layer 37, an active layer 39 of a quantum well structure, and a p-type gallium nitride based semiconductor layer 37. The p-type gallium nitride based semiconductor layer 37 includes, for example, a p-type AlGaN electron block layer and a p-type GaN contact layer. The primary surface 32a of the gallium oxide support base 32 is inclined at an angle of not less than 2 degrees and not more than 4 degrees relative to a (100) plane of monoclinic gallium oxide. Owing to this inclination, the gallium nitride based semiconductor epitaxially grown on the primary surface 32a of the gallium oxide support base has a flat surface.
Abstract translation:提供了一种氮化镓基半导体器件,其包括在氧化镓晶片上设置有平坦c面的氮化镓基半导体膜。 发光二极管LED包括具有单斜氧化镓的主表面32a的氧化镓载体基底32和III族氮化物的叠层结构33。 层压结构33的半导体台面包括低温GaN缓冲层35,n型GaN层37,量子阱结构的有源层39和p型氮化镓基半导体层37. p 型氮化镓系半导体层37例如包括p型AlGaN电子阻挡层和p型GaN接触层。 氧化镓载体基体32的主表面32a相对于单斜晶系氧化镓的(100)面倾斜2度以上4度以下。 由于该倾斜,在氧化镓载体基体的主表面32a上外延生长的氮化镓基半导体具有平坦的表面。
Abstract:
A production method for a semiconductor device includes providing a semiconductor substrate having semiconductor layer of a first conductivity type formed on a surface thereof; forming a first mask so as to cover a predetermined region of the semiconductor layer; (c) forming a well region of a second conductivity type by implanting impurity ions of the second conductivity type into the semiconductor layer having the first mask formed thereon; reducing the thickness of the first mask by removing a portion of the first mask; forming a second mask covering a portion of the well region by using photolithography; and forming a source region of the first conductivity type by implanting impurity ions of the first conductivity type into the semiconductor layer having the first mask with the reduced thickness and the second mask formed thereon.
Abstract:
A production method for a semiconductor device includes the steps of: (a) providing a semiconductor substrate having a semiconductor layer 2 of a first conductivity type formed on a surface thereof; (b) forming a first mask 30 so as to cover a predetermined region of the semiconductor layer 2; (c) forming a well region 6 of a second conductivity type by implanting impurity ions of the second conductivity type into the semiconductor layer 2 having the first mask 30 formed thereon; (d) reducing the thickness t1 of the first mask 30 by removing a portion of the first mask 30; (e) forming a second mask 34 covering a portion of the well region 6 by using photolithography; and (f) forming a source region 8 of the first conductivity type by implanting impurity ions of the first conductivity type into the semiconductor layer 2 having the first mask 30′ with the reduced thickness and the second mask 34 formed thereon.
Abstract:
A semiconductor device comprises a first insulating film formed on a semiconductor substrate, a first metal pattern formed on the first insulating film, a second insulating film formed on the first metal pattern, a second metal pattern formed on the second insulating film, and a third metal pattern formed in the second insulating film and connecting between the first metal pattern and the second metal pattern. The third metal pattern is a single continuous structure, and the principal orientation axes of crystals of a metal constituting the third metal pattern are parallel to the principal surface of the semiconductor substrate.
Abstract:
A semiconductor device comprises a first insulating film formed on a semiconductor substrate, a first metal pattern formed on the first insulating film, a second insulating film formed on the first metal pattern, a second metal pattern formed on the second insulating film, and a third metal pattern formed in the second insulating film and connecting between the first metal pattern and the second metal pattern. The third metal pattern is a single continuous structure, and the principal orientation axes of crystals of a metal constituting the third metal pattern are parallel to the principal surface of the semiconductor substrate.
Abstract:
A slurry feeding apparatus includes closed slurry bottle, piping, wet nitrogen generator, wet nitrogen supply pipe, suction and spray nozzles, temperature regulator, flow rate control valves, slurry delivery pump and controller for controlling the operation and flow rate of the slurry delivery pump. While a wafer is being polished by a CMP polisher, the controller continuously operates the pump. On the other hand, while the polisher is idling, the controller starts and stops the pump intermittently at regular intervals. No stirrer like a propeller is inserted into the slurry bottle, but the slurry is stirred up by spraying the slurry through the spray nozzle.
Abstract:
A photomask includes, on a translucent substrate, three or more first light-shielding portions each in insular shape having a property of shielding exposure light and spaced equidistantly, a second light-shielding portion having a property of shielding the exposure light and formed to connect the adjacent first light-shielding portions, and first light-transmitting portions each in slit shape having a property of transmitting the exposure light and formed to be surrounded with the first and second light-shielding portions. The second light-shielding portion is formed to contain a point located equidistantly from the three or more first light-shielding portions.
Abstract:
A semiconductor device comprises a first insulating film formed on a semiconductor substrate, a first metal pattern formed on the first insulating film, a second insulating film formed on the first metal pattern, a second metal pattern formed on the second insulating film, and a third metal pattern formed in the second insulating film and connecting between the first metal pattern and the second metal pattern. The third metal pattern is a single continuous structure, and the principal orientation axes of crystals of a metal constituting the third metal pattern are parallel to the principal surface of the semiconductor substrate.
Abstract:
A slurry feeding apparatus includes closed slurry bottle, piping, wet nitrogen generator, wet nitrogen supply pipe, suction and spray nozzles, temperature regulator, flow rate control valves, slurry delivery pump and controller for controlling the operation and flow rate of the slurry delivery pump. While a wafer is being polished by a CMP polisher, the controller continuously operates the pump. On the other hand, while the polisher is idling, the controller starts and stops the pump intermittently at regular intervals. No stirrer like a propeller is inserted into the slurry bottle, but the slurry is stirred up by spraying the slurry through the spray nozzle.