Abstract: There is a need to improve estimation accuracy of a failure estimation method or its failure estimation apparatus that performs failure estimation on a targeted instrument based on history information about several instruments mounted with the same type of semiconductor device as an instrument targeted at failure estimation. A failure estimation apparatus that includes a history information database storing history information about a plurality of instruments mounted with the same type of semiconductor device and performs failure estimation on a targeted instrument mounted with a semiconductor device whose type equals the type, wherein the history information contains operation information and failure information; wherein the operation information indicates a chronological operating state of the semiconductor device mounted on the instruments; wherein the failure information indicates a failure cause of a failed instrument; and wherein the operating state is categorized into a plurality of classifications.

Abstract: There is a need to improve estimation accuracy of a failure estimation method or its failure estimation apparatus that performs failure estimation on a targeted instrument based on history information about several instruments mounted with the same type of semiconductor device as an instrument targeted at failure estimation. A failure estimation apparatus that includes a history information database storing history information about a plurality of instruments mounted with the same type of semiconductor device and performs failure estimation on a targeted instrument mounted with a semiconductor device whose type equals the type, wherein the history information contains operation information and failure information; wherein the operation information indicates a chronological operating state of the semiconductor device mounted on the instruments; wherein the failure information indicates a failure cause of a failed instrument; and wherein the operating state is categorized into a plurality of classifications.

Abstract: The piping with a coolant inlet is provided with a partition wall within a body part. In the body part, a flow path having a U-turn region changing the flow direction of a coolant by about 180° degrees is defined. Much of the air contained in the coolant returning from a communicating hole to the body part floats up in a region leading to the U-turn region and is released from an inlet to the outside. By using this configuration, it is possible to provide a piping with a coolant inlet having a structure capable of efficiently releasing the air generated in a coolant circulation path.

Abstract: The piping with a coolant inlet is provided with a partition wall within a body part. In the body part, a flow path having a U-turn region changing the flow direction of a coolant by about 180° degrees is defined. Much of the air contained in the coolant returning from a communicating hole to the body part floats up in a region leading to the U-turn region and is released from an inlet to the outside. By using this configuration, it is possible to provide a piping with a coolant inlet having a structure capable of efficiently releasing the air generated in a coolant circulation path.