Patent ID: 7242273

Claim:
A MEMS switch comprising: a base portion including a substrate; a first anchor formed over said substrate; a first spring connected to said first anchor; an upper electrode member connected to said first spring, wherein said upper electrode member makes a motion above said substrate by elastically deforming said first spring; a lower electrode member formed over said substrate and positioned under said upper electrode member; a second spring connected to said upper electrode member; and a movable second anchor connected to said second spring, wherein said MEMS switch is switched on or off by switching contacting state between said upper electrode member and said lower electrode member, wherein said movable second anchor is brought into contact with said base portion before said MEMS switch turns on, wherein said second spring applies upward force to said upper electrode member when said MEMS switch is on; and wherein said lower electrode member includes an insulator film formed over a lower electrode, and when said upper electrode member is brought into contact with said lower electrode member, electrical capacitance is produced between said upper electrode member and said lower electrode member.