Patent ID: 6566617
Filing Date: 2003-05-20
Classification: B81B,H01H,Y10T

Abstract:
A micro machine switch for controlling conduction/non-conduction between first and second signal lines which are provided on a substrate in such a manner as to leave a predetermined gap between end portions thereof, comprising:a supporting member provided on said substrate in such a manner as to be adjacent to said gap and to have a predetermined height with respect to a surface of said substrate; a flexible beam member provided in such a manner as to project from the supporting member and to extend so far that part of the beam member faces said gap; a contact electrode provided at least on a substrate side of the beam member in such a position so as to face said gap; and a lower electrode provided on said substrate in such a manner as to face part of said beam member, wherein said beam member has a part ranging from a portion that is connected to said supporting member to a portion facing said lower electrode, is conductive, having a function as an upper electrode, and thermal expansion coefficients of said beam member are almost symmetric in a thickness direction perpendicular to said surface of the substrate, at least in a region ranging from the portion at which the beam member is connected to said supporting member to a vicinity of the portion facing said lower electrode.