Abstract: This electronic money transfer system provides an electronic money transfer method and a system for the same which allow handling electronic money in a sense that is very similar to cash, and which allow avoidance of loss of the electronic money even at a time of loss or theft of a terminal for operating the electronic money. To this end, first, information of an electronic certificate for a terminal (A) of a user A is sent from a terminal (B) of a user B to an electronic money management server (300), and information of the electronic certificate for the terminal (B) is sent from the terminal (A) to the electronic money management server (300). Thus, the terminals to perform the transaction are authenticated.

Abstract: This electronic money transfer system provides an electronic money transfer method and a system for the same which allow handling electronic money in a sense that is very similar to cash, and which allow avoidance of loss of the electronic money even at a time of loss or theft of a terminal for operating the electronic money. To this end, first, information of an electronic certificate for a terminal (A) of a user A is sent from a terminal (B) of a user B to an electronic money management server (300), and information of the electronic certificate for the terminal (B) is sent from the terminal (A) to the electronic money management server (300). Thus, the terminals to perform the transaction are authenticated.

Abstract: This electronic money transfer system provides an electronic money transfer method and a system for the same which allow handling electronic money in a sense that is very similar to cash, and which allow avoidance of loss of the electronic money even at a time of loss or theft of a terminal for operating the electronic money. To this end, first, information of an electronic certificate for a terminal (A) of a user A is sent from a terminal (B) of a user B to an electronic money management server (300), and information of the electronic certificate for the terminal (B) is sent from the terminal (A) to the electronic money management server (300). Thus, the terminals to perform the transaction are authenticated.

Abstract: This electronic money transfer system provides an electronic money transfer method and a system for the same which allow handling electronic money in a sense that is very similar to cash, and which allow avoidance of loss of the electronic money even at a time of loss or theft of a terminal for operating the electronic money. To this end, first, information of an electronic certificate for a terminal (A) of a user A is sent from a terminal (B) of a user B to an electronic money management server (300), and information of the electronic certificate for the terminal (B) is sent from the terminal (A) to the electronic money management server (300). Thus, the terminals to perform the transaction are authenticated.

Abstract: A method for producing a Ta sputtering target including the following steps: (a) a step of forging a Ta ingot, comprising subjecting the Ta ingot to a forging pattern over at least 3 times, wherein each forging pattern is “a cold forging step comprising stamp-forging and upset-forging operations alternatively repeated over at least 3 times; (b) an in-process vacuum heat-treating step carried out between every successive two forging patterns to thus prepare a Ta billet; (c) a step of rolling the Ta billet to obtain a rolled plate; and (d) a step of vacuum heat-treating the rolled plate to obtain a Ta sputtering target. A sputtering target produced by the above method.

Abstract: A method for producing a Ta sputtering target including the following steps: (a) a step of forging a Ta ingot, comprising subjecting the Ta ingot to a forging pattern over at least 3 times, wherein each forging pattern is “a cold forging step comprising stamp-forging and upset-forging operations alternatively repeated over at least 3 times; (b) an in-process vacuum heat-treating step carried out between every successive two forging patterns to thus prepare a Ta billet; (c) a step of rolling the Ta billet to obtain a rolled plate; and (d) a step of vacuum heat-treating the rolled plate to obtain a Ta sputtering target. A sputtering target produced by the above method.

Abstract: A method for producing a Ta sputtering target including the following steps: (a) a step of forging a Ta ingot, comprising subjecting the Ta ingot to a forging pattern over at least 3 times, wherein each forging pattern is “a cold forging step comprising stamp-forging and upset-forging operations alternatively repeated over at least 3 times; (b) an in-process vacuum heat-treating step carried out between every successive two forging patterns to thus prepare a Ta billet; (c) a step of rolling the Ta billet to obtain a rolled plate; and (d) a step of vacuum heat-treating the rolled plate to obtain a Ta sputtering target. A sputtering target produced by the above method.