Magnet wire having a high heat resistance and a method of removing insulating film covering magnet wire
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United States of America Patent
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Aug 16, 1994
Grant Date -
N/A
app pub date -
Mar 31, 1993
filing date -
Mar 31, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a magnet wire having a high heat resistance, a conductor, and an inner layer formed by baking a first resin coating covering the outer surface of the conductor. The inner layer has a heat resistance which is not lower than 130.degree. C. and is lower than 200.degree. C. An outer layer is formed by baking a second resin coating covering the outer surface of the inner layer, the outer layer having a heat resistance which is not lower than 200.degree. C., the thickness of the lower layer falling within a range of between 0.3 .mu.m and 5 .mu.m and being not larger than 1/3 of the sum of the thicknesses of the outer and inner layers. The present invention also provides a method of removing an insulating covering from a magnet wire having a high heat resistance comprising the steps of: preparing a magnet wire having a high heat resistance, and irradiating an insulating covering of said magnet wire with a converged laser beam having a high energy.
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