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:
-
- Tijeras, NM
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 909841
- Patent Number(s):
- 7207102
- Application Number:
- 10/817,007
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- 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}
}
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