Patent ID: 8693138

Claim:
A base unit for use in a disk drive apparatus, comprising: a stator including a plurality of coils; a wiring substrate electrically connected to the stator; and a base portion including an upper surface and a lower surface; wherein the base portion includes a tubular portion in which the stator is arranged, a first recess portion arranged on the upper surface of the base portion so as to surround the tubular portion, and a plurality of first through-holes arranged within the first recess portion to extend through the upper surface and the lower surface of the base portion; the wiring substrate includes a connection portion arranged on the upper surface of the base portion and provided with a plurality of lands electrically connected to the coils, a power feeding portion arranged on the lower surface of the base portion and an extension portion arranged to interconnect the connection portion and the power feeding portion; the plurality of first through-holes axially overlap with at least a portion of at least one of the plurality of lands; at least one lead wire is led out from at least one of the coils; the lead wire is soldered to a corresponding one of the plurality of lands within a corresponding one of the plurality of first through-holes; a first bonding layer is arranged between the connection portion and a bottom of the first recess portion to bond the connection portion and the bottom of the first recess portion together; and a second bonding layer is arranged between the power feeding portion and the lower surface of the base portion to bond the power feeding portion and the lower surface of the base portion together.