Disco Corporation

Ntt Docomo, Inc.

Masayuki Matsubara

Yoshinobu Saito

Shinichi Fujisawa

Hiroyuki Hosono

Takefumi Yamada

Yasuhiro Kawabe

Hidehiko Oyane

Akiko Kigawa

Tsutomu Sugaya

A workpiece unit that includes a workpiece, a tape stuck to the workpiece; and an annular frame to which an outer circumferential edge of the tape is stuck and which has an opening defined centrally therein. The workpiece is disposed in the opening in the annular frame and supported on the annular frame by the tape, and at least one of the tape and the annular frame has an irreversible discoloring section that discolors in response to an external stimulus. Such a configuration makes it possible to determine whether or not a process involving an external stimulus has been carried out on the workpiece unit, based on the appearance of the workpiece unit (i.e., based on whether the irreversible discoloring section has been discolored or not).

Workpiece unit

A workpiece unit includes a wafer, a tape attached to the wafer, and an annular frame to which an outer peripheral edge of the tape is attached and having an opening in a center of the annular frame, and the workpiece unit has the wafer positioned in the opening of the annular frame through the tape. In the workpiece unit, the tape has a color change layer that reversibly changes in color in response to a change in temperature caused by cooling.

Workpiece unit including adhesive tape with color change layer

A method of expanding a sheet includes the steps of gripping the sheet with a first gripping unit and a second griping unit and gripping the sheet with a third gripping unit and a fourth gripping unit, and expanding the sheet by moving the first gripping unit and the second griping unit away from each other in first directions relatively and moving the third gripping unit and the fourth gripping unit away from each other in second directions relatively. In the step of expanding the sheet, the states of the sheet that is under tension are detected, and movement of the first gripping unit, the second griping unit, the third gripping unit, and the fourth gripping unit is controlled based on the detected states of the sheet.

Expanding method

A base station in a mobile communication system transmits and receives wireless signals with a user apparatus in a cell; in the case where the base station is connected to a communication network through a router, obtains an address of the router; periodically receives time information from a time information server through the communication network; stores in a memory unit the router's address and a current time indicated by the time information; and () in the case where a current-time-storing-is-stopped period is equal to or greater than a threshold value, or () in the case where the current-time-storing-is-stopped period is less than the threshold value and is equal to or greater than another threshold value, and an address just received from the router is different from the address stored in the memory unit, transmits a control signal for stopping the transmission of the wireless signal.

Growing community of inventors

Tokyo, Japan

Masayuki Matsubara