Patent ID: 8723061

Claim:
A MEMS switch, comprising: a first electrode; and a second electrode, a third electrode and a fourth electrode which are separated from and opposed to the first electrode, wherein an electrical contact can be made between the first electrode and the second electrode by electrostatic force generated between the first electrode and the third electrode and between the first electrode and the fourth electrode, a bump which can form a contact between the first electrode and the third electrode is provided on the first electrode, another bump which can form a contact between the first electrode and the fourth electrode is provided on the first electrode, and a gap is formed between the first electrode and the third electrode and between the first electrode and the fourth electrode when the electrical contact is made between the first electrode and the second electrode, and wherein the bump and a floating-island electrode formed within the third electrode can form the contact, the other bump and other floating-island electrode formed within the fourth electrode can form the contact, the third electrode and the fourth electrode are separated from each other, and, the third electrode and the fourth electrode are placed so as to sandwich the electrical contact when viewed from above.