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US 12,387,749 B2Granted
Spindle motor
AssigneeMINEBEA MITSUMI Inc.
InventorsAkihiko Suzuki, Makoto Chonan
Life of this patent
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Abstract
Provided are a base member for a heat-assisted magnetic recording disk drive apparatus, the base member including: a coating film coating at least a part of the base member, in which the coating film is an overbaked epoxy resin-containing electrodeposition coating film, a spindle motor including the base member, and a method for manufacturing the base member.
Claims5
A base member for a heat-assisted magnetic recording disk drive apparatus, the base member comprising:
- a coating film coating at least a part of the base member, wherein
- the coating film is an epoxy resin-containing electrodeposition coating film overbaked,
- wherein
- the coating film contains a benzene ring-containing epoxy resin and a pigment containing an aluminum silicate component, and
- a value of a ratio x of peak intensities calculated using Equation (1) below is 0.8 or less in an absorption spectrum of the coating film obtained by Fourier transform infrared spectroscopy,
- x
- =
- I
- polymer
- /
- I
- pigment
- (
- 1
- )
- (where Ipolymer represents a value of peak intensity at a wave number corresponding to absorbance derived from a benzene ring, and Ipigment represents a value of peak intensity at a wave number corresponding to absorbance derived from a pigment containing an aluminum silicate component).
13 more elements
Dependencies are inferred from the claim text.