US 6,941,637 B2 · Method of manufacturing a motor comprising a rare earth thick film magnet

Abstract

The method of manufacturing rare earth thick film magnet comprising a step of forming an alloy layer of 30-100 μm thick having a general formula RXBYTMZ on a substrate by a physical deposition process, and a step of heat-treating the alloy layer to form a thick film magnetic layer having R2TM14B phase as a main phase. In the general formula, R is at least one of rare earth elements, B is boron, TM is iron or its alloy partly substituted by cobalt. X is 0.1-0.2, Y is 0.05-0.2 and Z=1-X-Y. Further, the method of the present invention includes a step of laminating a plurality of alloy layers formed on a substrate together with the substrate. A motor comprising rare earth thick film magnet of the present invention is extremely small while obtaining high output.

Claims17

Dependent claims

A method of manufacturing a rare earth thick film magnet comprising:

a step forming a RXBYTMZ alloy layer of 30 to 100 μm in thickness on a substrate by a laser ablation process;
and
a step of heat-treating said alloy layer to form a thick film magnetic layer having R2TM14B as main phase,
where R is at least one selected from rare earth elements, B is boron, TM is iron or iron alloy partly substituted by cobalt, and X:
0.1-0.2, Y:
0.05-0.2 and Z=1-X-Y.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/092,547Filed 8 Mar 2002

Priority

JP 2001-0663569 Mar 2001

Published

US 2002/0158534 A131 Oct 2002

Granted

13 Sep 2005

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

H02K 21/24
With stationary armatures and rotating magnets: with magnets axially facing the armatures, e.g. hub-type cycle dynamos
H01F 1/0027
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties: thick magnetic…
H01F 1/057
And magnetic transition metals, e.g. SmCo5: and IIIa elements, e.g. Nd2Fe14B
H01F 10/126
Being metals or alloys: containing rare earth metals

Method of manufacturing a motor comprising a rare earth thick film magnet

Life of this patent

Method of manufacturing a motor comprising a rare earth thick film magnet

Life of this patent

Abstract

Claims17