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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 Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
909841
Patent Number(s):
7,207,102
Application Number:
10/817,007
Assignee:
Sandia Corporation (Albuquerque, NM)
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. 2007. "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 = {},
url = {https://www.osti.gov/biblio/909841}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 24 00:00:00 EDT 2007},
month = {Tue Apr 24 00:00:00 EDT 2007}
}

Works referenced in this record:

Towards a piezoelectric vibration-powered microgenerator
journal, January 2001


Self-powered signal processing using vibration-based power generation
journal, May 1998


A laser-micromachined multi-modal resonating power transducer for wireless sensing systems
journal, April 2002


A proposal of electric power generating system for implanted medical devices
journal, January 1999


Development of an electromagnetic micro-generator
journal, January 2001


Temperature compensation of NdFeB permanent magnets
conference, January 1998


Permanent magnet films for applications in microelectromechanical systems
journal, February 2000


Design and fabrication of a new vibration-based electromechanical power generator
journal, August 2001


Feasibility study of a vibration powered micro-electric generator
conference, January 1996