Invention Grant
- Patent Title: Gating voltage control system and method for electrostatically actuating a micro-electromechanical device
- Patent Title (中): 门电压控制系统和静电驱动微机电装置的方法
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Application No.: US11622483Application Date: 2007-01-12
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Publication No.: US07473859B2Publication Date: 2009-01-06
- Inventor: Joshua Isaac Wright , Kanakasabapathi Subramanian , William James Premerlani , John Norton Park , Christopher Keimel , Long Que , Kuna Venkat Satya Rama Kishore , Abhijeet Dinkar Sathe , Xuefeng Wang , Edward Keith Howell
- Applicant: Joshua Isaac Wright , Kanakasabapathi Subramanian , William James Premerlani , John Norton Park , Christopher Keimel , Long Que , Kuna Venkat Satya Rama Kishore , Abhijeet Dinkar Sathe , Xuefeng Wang , Edward Keith Howell
- Applicant Address: US NY Niskayuna
- Assignee: General Electric Company
- Current Assignee: General Electric Company
- Current Assignee Address: US NY Niskayuna
- Agent Jason K. Klindtworth
- Main IPC: H01H51/22
- IPC: H01H51/22

Abstract:
A gating voltage control system and method are provided for electrostatically actuating a micro-electromechanical systems (MEMS) device, e.g., a MEMS switch. The device may comprise an electrostatically responsive actuator movable through a gap for actuating the device to a respective actuating condition corresponding to one of a first actuating condition (e.g., a closed switching condition) and a second actuating condition (e.g., an open switching condition). The gating voltage control system may comprise a drive circuit electrically coupled to a gate terminal of the device to apply a gating voltage. The gating voltage control system may further comprise a controller electrically coupled to the drive circuit to control the gating voltage applied to the gating terminal in accordance with a gating voltage control sequence. The gating voltage control sequence may comprise a first interval for ramping up the gating voltage to a voltage level for producing an electrostatic force sufficient to accelerate the actuator through a portion of the gap to be traversed by the actuator to reach a respective actuating condition. The gating voltage control sequence may further comprise a second interval for ramping down the gating voltage to a level sufficient to reduce the electrostatic force acting on the movable actuator. This allows reducing the amount of force at which the actuator engages a contact for establishing the first actuating condition, or avoiding an overshoot position of the actuator while reaching the second actuating condition.
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