Abstract: A semiconductor device includes a first electrode, a first semiconductor layer of a first conductivity type located on the first electrode, a second semiconductor layer of a second conductivity type located on a portion of the first semiconductor layer, a metal layer located on the first and second semiconductor layers, a second electrode located on the metal layer, a bonding member connected to an upper surface of the second electrode, and a conductive member located between the second semiconductor layer and the metal layer. The metal layer has a Schottky junction with the first semiconductor layer. The conductive member is made of a different material from the metal layer. An area ratio of the conductive member in a region directly under the bonding member is higher than an area ratio of the conductive member in a region other than the region directly under the bonding member.

Abstract: A chatter vibration suppressing method includes acquiring a moment of inertia of a rotating body, recording a value indicating the acquired moment of inertia into a machining program, and calculating a variable amplitude and a variable period when a rotation speed of the rotating body is varied in order to suppress chatter vibration from the value indicating the moment of inertia recorded in the machining program and the maximum input power of a motor for rotating the rotating body.

Abstract: A chatter vibration suppressing method includes acquiring a moment of inertia of a rotating body, recording a value indicating the acquired moment of inertia into a machining program, and calculating a variable amplitude and a variable period when a rotation speed of the rotating body is varied in order to suppress chatter vibration from the value indicating the moment of inertia recorded in the machining program and the maximum input power of a motor for rotating the rotating body.

Abstract: A plurality of parameter-sets, the components of which are parameter items for determining a machining method, are provided, stored in advance. The Most suitable machining method is determined for a subject workpiece by allowing an operator to select the most suitable parameter-set from among the plurality of the parameter-sets used in to determining the machining method.

Abstract: A machining region which is determined from an inputted before-machining shape and an inputted after-machining shape is divided and the divided machining regions are united to form a united machining region. An optimum machining process is obtained by selecting an optimum combination of the machining regions based on parameters set in advance, and determining a machining method for the united machining region.

Abstract: A numerical control information generating system evaluates all the factors comprehensively in determination of a machining method simply by comparing a threshold with a sum of evaluation values of plural judgement factors. The evaluation values of the judgement factors may be obtained by an evaluation function assigned to each of the factors. If the evaluation values are defined to be varying continuously, they become close to dimensions which are approximate to each other. This may minimize the inconveniences heretofore caused in determination of a machining method such that an extremely small dimensional difference in a step distinguishes a face machining from a longitudinal machining. If the weight which is to be multiplied on each of the judgement factors is suitably varied, the factors may easily be selected or prioritized according to the intent of an operator. Moreover, the ratio of the face machining against the longitudinal machining may be adjusted by suitably setting a threshold.

Abstract: In a numerical control information generating apparatus and a method for determining machining modes thereof, machining areas are divided appropriately and machining modes most suitable for each divided area are determined. Therefore, the most efficient tool trace can be obtaianed and the overall cutting time can be shortened.

Abstract: A method for determining a machining method in a numerical control information generating apparatus is realized by the steps of: dividing an area where recessed shapes overlap into a machining area where recessed shapes overlap and an area where recessed shapes do not overlap; determining a cutting tool for a machining area where recessed shapes do not overlap; determining whether or not the machining area where recessed shapes overlap can be cut by the same cutting tool, and combining the machining area where recessed shapes overlap with the machining area where recessed shapes do not overlap. As a result of this, machining modes can be determined automatically for a shape where recessed shapes overlap.

Abstract: A machining method is for determining numerical control information in a numerical control machine tool apparatus. A method includes inputting workpiece data denoting an initial shape of a workpiece which is to be machined, and further inputting product data denoting a desired final shape of the workpiece after it has been machined. Then, a machining area of the workpiece based on the workpiece data and the product data is determined. The thus determined machining area is divided into plural machining locations, and the numerical control information is prepared based on the plural machining locations. The workpiece is then machined based on the thus prepared numerical control information.