摘要:
An inter-level insulation film is formed on a first-level interconnection layer and part of the inter-level insulation film which lies on the first-level interconnection layer is etched to form a contact hole. After a natural oxidation film formed on the surface of part of the first-level interconnection layer which is exposed in the contact hole is removed, the resultant structure is exposed to a gas atmosphere containing halogen to purify the surface of the inter-level insulation film. After this, a contact plug is deposited and formed on the first-level interconnection layer which is exposed in the contact hole by the selective CVD method to fill in the contact hole. A second-level interconnection layer is formed on the inter-level insulation film and the first-level and second-level interconnection layers are electrically connected to each other via the contact plug.
摘要:
In a method of manufacturing a semiconductor device having a multilayer wiring structure, it has at least two underlying layers having different etching conditions. Firstly, the native oxide film formed on one of the underlying layers, or a barrier metal layer, is etched out under etching conditions suitable for the barrier metal layer. Then, the surface of the barrier metal layer is capped with a plugging material having etching conditions similar to or substantially the same as those of the other one of the underlying layers, or a lower wiring layer. Subsequently, the native oxide film and the etching by-product formed on the lower wiring layer are etched out under etching conditions suitable for the lower wiring layer. Thereafter, contact holes for the two underlying layers are buried with a conductive substance to establish electric connection with their respective upper conductive layers. With the above described steps, the entire manufacturing process is significantly simplified and the time required for burying the contact holes is greatly reduced without remarkably increasing the contact resistance between the barrier metal layer and the lower wiring layer and the respective buried conductive substances.
摘要:
Disclosed are an apparatus and a method for manufacturing a semiconductor device. A Si wafer set within an L/UL chamber is transferred under the state of a high vacuum through a transfer chamber into a Ti chamber. The wafer is heated to at least 300° C. within the Ti chamber by a heating mechanism arranged within the Ti chamber. Then, a TiSix film is formed at a bottom portion of a contact hole by a plasma CVD method using an Ar gas supplied through a gas line as a carrier gas and a TiCl4 gas supplied through another gas line as a source gas, Ti in the source gas being self-aligned with Si in the wafer. The wafer having the TiSix film formed therein is transferred through the transfer chamber into a W chamber without being exposed to the air atmosphere. Within the W chamber, a W film is consecutively deposited by a selective CVD method on the TiSix film. The particular technique makes it possible to form the TiSix film of a high quality at a bottom portion of the contact hole even if the contact hole has a large aspect ratio.
摘要:
A gas purification apparatus has two gas purification units which are alternately operated. A gas purification capacity measuring means includes a means including valves for separating a target gas purification unit from a line, an evacuating means for evacuating the separated gas purification unit at a high vacuum, a means including a supply tank for supplying a predetermined very small amount of an impurity gas to an inlet of the high-vacuum separated gas purification unit, an auxiliary tank (e.g., a pressure reduction tank, a metering tank, and a pressure reduction valve), and a vacuum gauge for measuring a change in pressure at the outlet upon supply of the impurity gas to the inlet. In the gas purification apparatus having gas purification units each incorporating a getter material, the gas purification capacity of each gas purification unit can be more accurately and easily measured.
摘要:
An Al alloy interconnection layer is deposited on a silicon oxide layer, and a first carbon layer is formed on the Al alloy interconnection layer. Then, the first carbon layer and the Al alloy interconnection layer are patterned, thereby forming a first interconnection layer consisting of the Al alloy interconnection layer and the first carbon layer. Sequentially, a second carbon layer is formed on the first interconnection layer and the silicon oxide layer. The second carbon layer is entirely etched by the RIE method, thereby leaving the second carbon layer only on side surfaces of the first interconnection layer. A high temperature layer made of SiO.sub.2 is deposited on the second carbon layer, the first interconnection layer and the silicon oxide layer. Thereafter, the high temperature layer is etched back until the first carbon layer is exposed, thus being flattened. An interlayer insulating layer is deposited on the high temperature layer and the first interconnection layer.
摘要:
An Al alloy interconnection layer is deposited on a silicon oxide layer, and a first carbon layer is formed on the Al alloy interconnection layer. Then, the first carbon layer and the Al alloy interconnection layer are patterned, thereby forming a first interconnection layer consisting of the Al alloy interconnection layer and the first carbon layer. Sequentially, a second carbon layer is formed on the first interconnection layer and the silicon oxide layer. The second carbon layer is entirely etched by the RIE method, thereby leaving the second carbon layer only on side surfaces of the first interconnection layer. A high temperature layer made of SiO.sub.2 is deposited on the second carbon layer, the first interconnection layer and the silicon oxide layer. Thereafter, the high temperature layer is etched back until the first carbon layer is exposed, thus being flattened. An interlayer insulating layer is deposited on the high temperature layer and the first interconnection layer.
摘要:
A watercraft can include seats having hip supports for the riders including an operator and/or passengers thereof. Additionally, the watercraft can include a handlebar cover that is configured to prevent water from entering a steering mechanism. For example, the handlebar cover can include a lower portion and an upper portion extending downwardly over the lower portion.
摘要:
A semiconductor device and a method of manufacturing the same, to appropriately determine an impurity concentration distribution of a field relieving region and reduce an ON-resistance. The semiconductor device includes a substrate, a first drift layer, a second drift layer, a first well region, a second well region, a current control region, and a field relieving region. The first well region is disposed continuously from an end portion adjacent to the vicinity of outer peripheral portion of the second drift layer to a portion of the first drift layer below the vicinity of outer peripheral portion. The field relieving region is so disposed in the first drift layer as to be adjacent to the first well region.
摘要:
A steering system for a water vehicle includes a housing having a substantially cylindrical member, at least one case member extending through the substantially cylindrical member, a column shaft extending through the pair of case members, including at least one elongated hole disposed on opposed side of the column shaft, and being arranged to move relative to the pair of case members and the housing in an axial direction of the column shaft, and a telescoping mechanism partially disposed in the column shaft. One of the pair of case members includes a plurality of detents provided on an inner surface thereof. The telescoping mechanism includes at least one elongated hole disposed at one end portion of the telescoping mechanism, a locking pin extending through the at least one elongated hole in the telescoping mechanism and the at least one elongated hole in the column shaft, and a lever disposed at an opposite end portion from the one end portion of the telescoping mechanism. The lever is movable to move the locking pin into and out of engagement with respective ones of the plurality of detents to enable the column shaft to be selectively moved relative to the pair of case members and the housing and fixed at a desired location relative to the pair of case members and the housing.
摘要:
In a process for preparing a spherical copper fine powder having an average grain size ranging from 0.1 .mu.m to a few .mu.m, by use of chemical vapor deposition of cuprous chloride vapor with a reducing gas, the vapor deposition zone is maintained at a temperature ranging 900.degree. C. to less than 1,150.degree. C. and the generated particles are quenched subsequently. The generated powder is utilized as a conductive powder which is the main component of a conductive paste.