Abstract:
A micro-electro-mechanical (MEMS) switch (10, 110) has an electrode (22, 122) covered by a dielectric layer (23, 123), and has a flexible conductive membrane (31, 131) which moves between positions spaced from and engaging the dielectric layer. At least one of the membrane and dielectric layer has a textured surface (138) that engages the other thereof in the actuated position. The textured surface reduces the area of physical contact through which electric charge from the membrane can tunnel into and become trapped within the dielectric layer. This reduce the amount of trapped charge that could act to latch the membrane in its actuated position, which in turn effects a significant increase in the operational lifetime of the switch.
Abstract:
Resonators 4 and 5 are able to oscillate horizontally and vertically to substrate 1. Resonator 4 is primarily composed of a supporting portion in stationary contact with substrate 1, a movable portion including a contact surface making contact with resonator 5 and a contact surface making contact with electrode 7, and a crossing portion that couples the supporting portion and movable portion. Electrode 6 is disposed in the direction in which resonator 5 is spaced apart from resonator 4. Electrode 7 is disposed in the direction in which resonator 4 is spaced apart from resonator 5. Electrode 9 is disposed in a position that causes resonator 5 to generate electrostatic force in a direction different from the direction of both forces of attraction acting between resonators 4 and 5 and between resonator 5 and electrode 6.
Abstract:
A method for fabricating a MEMS device having a fixing part, driving part, electrode part, and contact parts on a substrate. A driving electrode is formed on the substrate, and then an insulation layer is formed thereon. The insulation layer is patterned, and the regions of the insulation layer in which the fixing part and the contact parts are formed are etched. A metal layer is formed on the substrate. The metal layer is planarized down to the insulation layer, and the driving electrode is formed. A sacrificial layer is formed on the substrate, and a groove-shaped space is formed in a region in which the fixing part is formed. A MEMS structure layer is formed on the sacrificial layer. Sidewalls are formed in the groove-shaped space, and the fixing part and driving part are formed, leaving the sacrificial layer underneath the fixing part.
Abstract:
A micro-machine switch in accordance with the present invention includes a supporter having a predetermined height relative to a surface of a substrate, a flexible cantilever projecting from the supporter in parallel with a surface of the substrate, and having a distal end facing a gap formed between two signal lines, a contact electrode formed on the cantilever, facing the gap, a lower electrode formed on the substrate in facing relation with a part of the cantilever, and an intermediate electrode formed on the cantilever in facing relation with the lower electrode. The micro-machine switch can operate at a lower drive voltage than a voltage at which a conventional micro-machine switch operates, and can enhance a resistance of an insulating film against a voltage.
Abstract:
Das mikromechanische elektrostatische Relais besitzt einerseits ein Basissubstrat mit einer Basiselektrode und einem Basis-Kontaktstück, andererseits ein Ankersubstrat mit einer freigeätzten, vom Basissubstrat weg gekrümmten Anker-Federzunge (2) mit einer Ankerelektrode und einem Anker-Kontaktstück. Bei Anlegen einer Steuerspannung zwischen den beiden Elektroden rollt die Federzunge auf dem Basissubstrat ab und schließt damit den Kontakt. Die Krümmung der Federzunge im Ruhezustand wird durch eine Beschichtung mit einer Druckspannungsschicht erzeugt. Um dabei unerwünschte Querwölbungen der Federzunge zu vermeiden, ist die Druckspannungsschicht (41) in Längsrichtung der Federzunge durch Schlitze (21) in Streifen (22) unterteilt. Eine ganzflächig über die Streifen und Schlitze aufgebrachte Zugspannungsschicht (42) verstärkt den Kompensationseffekt.
Abstract in simplified Chinese:一种微机电设备有一微机电设备夹置于一基座与一电路芯片之间。该微机电设备之可动构件系安装在向上与该电路芯片相对之侧上。该可动构件可被安装在该微机电设备之一基板上或是直接形成在该电路芯片之一钝化层上。该电路芯片透过接合引线、穿透该微机电设备之信道或一位于该微机电设备以外之传导路径譬如焊料球提供控制信号给该微机电设备。