Abstract: Disclosed is an electronic device including a tunable element, a first power supply circuit, and a second power supply circuit. The first power supply circuit and the second power supply circuit are electrically connected to the tunable element. The first power supply circuit drives the tunable element during a first time period. The second power supply circuit drives the tunable element during a second time period.

Abstract: A chemical mechanical planarization (CMP) system including a capacitive deionization module (CDM) for removing ions from a solution and a method for using the same are disclosed. In an embodiment, an apparatus includes a planarization unit for planarizing a wafer; a cleaning unit for cleaning the wafer; a wafer transportation unit for transporting the wafer between the planarization unit and the cleaning unit; and a capacitive deionization module for removing ions from a solution used in at least one of the planarization unit or the cleaning unit.

Abstract: A wrench includes a first part having a first pivotal portion, a second part having a second pivotal portion, a connector pivotally connected in the first and second pivotal portions by two pins extending through the first and second pivotal portion and the two ends of the connector so as to pivotally connect the first part and the second part. Each of the first and second parts is pivotable relative to the connector.