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Title: Method for forming permanent magnets with different polarities for use in microelectromechanical devices

Abstract

Methods are provided for forming a plurality of permanent magnets with two different north-south magnetic pole alignments for use in microelectromechanical (MEM) devices. These methods are based on initially magnetizing the permanent magnets all in the same direction, and then utilizing a combination of heating and a magnetic field to switch the polarity of a portion of the permanent magnets while not switching the remaining permanent magnets. The permanent magnets, in some instances, can all have the same rare-earth composition (e.g. NdFeB) or can be formed of two different rare-earth materials (e.g. NdFeB and SmCo). The methods can be used to form a plurality of permanent magnets side-by-side on or within a substrate with an alternating polarity, or to form a two-dimensional array of permanent magnets in which the polarity of every other row of the array is alternated.

Inventors:
 [1];  [2]
  1. Tijeras, NM
  2. Albuquerque, NM
Publication Date:
Research Org.:
Sandia National Laboratories (SNL-NM), Albuquerque, NM
Sponsoring Org.:
USDOE
OSTI Identifier:
909841
Patent Number(s):
7,207,102
Application Number:
10/817,007
Assignee:
Sandia Corporation (Albuquerque, NM) ALO
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Roesler, Alexander W, and Christenson, Todd R. Method for forming permanent magnets with different polarities for use in microelectromechanical devices. United States: N. p., 2007. Web.
Roesler, Alexander W, & Christenson, Todd R. Method for forming permanent magnets with different polarities for use in microelectromechanical devices. United States.
Roesler, Alexander W, and Christenson, Todd R. Tue . "Method for forming permanent magnets with different polarities for use in microelectromechanical devices". United States. https://www.osti.gov/servlets/purl/909841.
@article{osti_909841,
title = {Method for forming permanent magnets with different polarities for use in microelectromechanical devices},
author = {Roesler, Alexander W and Christenson, Todd R},
abstractNote = {Methods are provided for forming a plurality of permanent magnets with two different north-south magnetic pole alignments for use in microelectromechanical (MEM) devices. These methods are based on initially magnetizing the permanent magnets all in the same direction, and then utilizing a combination of heating and a magnetic field to switch the polarity of a portion of the permanent magnets while not switching the remaining permanent magnets. The permanent magnets, in some instances, can all have the same rare-earth composition (e.g. NdFeB) or can be formed of two different rare-earth materials (e.g. NdFeB and SmCo). The methods can be used to form a plurality of permanent magnets side-by-side on or within a substrate with an alternating polarity, or to form a two-dimensional array of permanent magnets in which the polarity of every other row of the array is alternated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {4}
}

Patent:

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