Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2008-07-01
2008-07-01
Takaoka, Dean O (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S262000
Reexamination Certificate
active
07394332
ABSTRACT:
A MEM switch is described having a free moving element within in micro-cavity, and guided by at least one inductive element. The switch consists of an upper inductive coil; an optional lower inductive coil, each having a metallic core preferably made of permalloy; a micro-cavity; and a free-moving switching element preferably also made of magnetic material. Switching is achieved by passing a current through the upper coil, inducing a magnetic field in the coil element. The magnetic field attracts the free-moving magnetic element upwards, shorting two open wires and thus, closing the switch. When the current flow stops or is reversed, the free-moving magnetic element drops back by gravity to the bottom of the micro-cavity and the wires open. When the chip is not mounted with the correct orientation, gravity cannot be used. In such an instance, a lower coil becomes necessary to pull the free-moving switching element back and holding it at its original position.
REFERENCES:
patent: 7215229 (2007-05-01), Shen et al.
patent: 7250838 (2007-07-01), Shen et al.
patent: 2003/0156451 (2003-08-01), Tamura et al.
patent: 2004/0050674 (2004-03-01), Rubel
Clevenger Lowrence A.
Dalton Timothy J.
Hon Wong Keith Kwong
Hsu Louis C.
Radens Carl J.
International Business Machines - Corporation
Schnurmann H. Daniel
Takaoka Dean O
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