Abstract: A first substrate (11a) is positioned on a support surface (7) in a vacuum chamber with an upward-facing first bonding surface (12a) spin-coated with adhesive while a second substrate (11b) is held with downward-facing second bonding surface (12b) to a cover (3) by suction. While the vacuum chamber is being evacuated to a pressure of between 0.1 mbar and 2 mbar, a support pin (9) is extended through central openings (14a, 14b) of the substrates (11a, 11b) and then retracted with the second substrate (11b) released from the cover (3) and carried by radially extended balls (10). The support pin (9) is lowered to a position where the balls (10), acting against the first bonding surface (12a), deform the first substrate (11a). The first bonding surface (12a) being therefore slightly concave, the first and second bonding surfaces (12a, 12b) only touch close to their circumferences.

Abstract: A first substrate (11a) is positioned on a support surface (7) in a vacuum chamber with an upward-facing first bonding surface (12a) spin-coated with adhesive while a second substrate (11b) is held with downward-facing second bonding surface (12b) to a cover (3) by suction. While the vacuum chamber is being evacuated to a pressure of between 0.1 mbar and 2 mbar, a support pin (9) is extended through central openings (14a, 14b) of the substrates (11a, 11b) and then retracted with the second substrate (11b) released from the cover (3) and carried by radially extended balls (10). The support pin (9) is lowered to a position where the balls (10), acting against the first bonding surface (12a), deform the first substrate (11a). The first bonding surface (12a) being therefore slightly concave, the first and second bonding surfaces (12a, 12b) only touch close to their circumferences.

Abstract: A user connected to a data network controls a parallel teleconference network by sending requests through the data network. The requests are validated against permissions granted to the user and an action associated with a request is performed at the teleconferencing network if the request is validated. A status for a teleconference hosted by the teleconferencing network may be sent when the action is performed or when other changes occur during the teleconference. A voice message also may be sent to a user that is affected by the action. In one aspect, the allowed actions are presented to the user through the data network. In another aspect, a graphical user interface for controlling the teleconferencing network is presented to the user through the data network.

Abstract: A first substrate (11a) is positioned on a support surface (7) in a vacuum chamber with an upward-facing first bonding surface (12a) spin-coated with adhesive while a second substrate (11b) is held with downward-facing second bonding surface (12b) to a cover (3) by suction. While the vacuum chamber is being evacuated to a pressure of between 0.1 mbar and 2 mbar, a support pin (9) is extended through central openings (14a, 14b) of the substrates (11a, 11b) and then retracted with the second substrate (11b) released from the cover (3) and carried by radially extended balls (10). The support pin (9) is lowered to a position where the balls (10), acting against the first bonding surface (12a), deform the first substrate (11a). The first bonding surface (12a) being therefore slightly concave, the first and second bonding surfaces (12a, 12b) only touch close to their circumferences.

Abstract: A user connected to a data network controls a parallel teleconference network by sending requests through the data network. The requests are validated against permissions granted to the user and an action associated with a request is performed at the teleconferencing network if the request is validated. A status for a teleconference hosted by the teleconferencing network may be sent when the action is performed or when other changes occur during the teleconference. A voice message also may be sent to a user that is affected by the action. In one aspect, the allowed actions are presented to the user through the data network. In another aspect, a graphical user interface for controlling the teleconferencing network is presented to the user through the data network.