Spindle motor having spindle motor stator with laminate layers for increased head stack assembly access

A spindle motor for use in a disk drive having a rotatable head stack assembly, the spindle motor comprising:

• a spindle motor hub;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim formed of at least two vertically stacked stator rim laminate layers;
• a plurality of stator teeth arrayed about and internally extending from the stator rim, the stator teeth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator teeth each being formed of at least two stator tooth laminate layers, the stator tooth laminate layers being respectively attached to the stator rim laminate layers;
• and
• at least one reduced height stator tooth having at least two reduced height stator tooth laminate layers horizontally off-set from and vertically formed towards each other, the reduced height stator tooth being positionable adjacent the head stack assembly for allowing the head stack assembly to pivot over the reduced height stator tooth.

A spindle motor for use in a disk drive having a rotatable head stack assembly, the spindle motor comprising:

• a spindle motor hub;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim formed of at least two vertically stacked stator rim laminate layers;
• at least one stator tooth internally extending from the stator rim, the stator tooth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator tooth being formed of at least two stator tooth laminate layers horizontally off-set from and vertically formed towards each other, the stator tooth laminate layers being respectively attached to the stator rim laminate layers, the stator tooth being positionable adjacent the head stack assembly for allowing the head stack assembly to pivot over the stator tooth.

A spindle motor for use in a disk drive having a rotatable head stack assembly, the spindle motor comprising:

• a spindle motor hub defining an axis of rotation;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim;
• and
• a plurality of stator teeth arrayed about and internally extending from the stator rim, the stator teeth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator teeth having laminate layers formed to a first thickness, the stator teeth having at least one reduced height stator tooth, the reduced height stator tooth having laminate layers formed to a second thickness less than the first thickness, the reduced height stator tooth being positionable adjacent the head stack assembly in a direction parallel to the axis of rotation for allowing the head stack assembly to pivot over the reduced height stator tooth.

A disk drive comprising:

• a disk drive base;
• a head stack assembly rotatably attached to the disk drive base;
• and
• a spindle motor attached to the disk drive base including:
• a spindle motor hub defining an axis of rotation;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim;
• and
• a plurality of stator teeth arrayed about and internally extending from the stator rim, the stator teeth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator teeth having laminate layers, the stator teeth having at least one reduced height stator tooth, the reduced height stator tooth having fewer laminate layers than a remainder of the stator teeth, the reduced height stator tooth being positionable adjacent the head stack assembly in a direction parallel to the axis of rotation for allowing the head stack assembly to pivot over the reduced height stator tooth.

A disk drive comprising:

• a disk drive base;
• a head stack assembly rotatably attached to the disk drive base;
• and
• a spindle motor attached to the disk drive base including:
• a spindle motor hub;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim formed of at least two vertically stacked stator rim laminate layers;
• a plurality of stator teeth arrayed about and internally extending from the stator rim, the stator teeth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator teeth each being formed of at least two stator tooth laminate layers, the stator tooth laminate layers being respectively attached to the stator rim laminate layers;
• and
• at least one reduced height stator tooth having at least two reduced height stator tooth laminate layers horizontally off-set from and vertically formed towards each other, the reduced height stator tooth being positionable adjacent the head stack assembly for allowing the head stack assembly to pivot over the reduced height stator tooth.

A disk drive comprising:

• a disk drive base;
• a head stack assembly rotatably attached to the disk drive base;
• and
• a spindle motor attached to the disk drive base including:
• a spindle motor hub;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim formed of at least two vertically stacked stator rim laminate layers;
• at least one stator tooth internally extending from the stator rim, the stator tooth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator tooth being formed of at least two stator tooth laminate layers horizontally off-set from and vertically formed towards each other, the stator tooth laminate layers being respectively attached to the stator rim laminate layers, the stator tooth being positionable adjacent the head stack assembly for allowing the head stack assembly to pivot over the stator tooth.

A disk drive comprising:

• a disk drive base;
• a head stack assembly rotatably attached to the disk drive base;
• and
• a spindle motor attached to the disk drive base including:
• a spindle motor hub defining an axis of rotation;
• a magnet radially attached about the spindle motor hub;
• and
• a spindle motor stator including:
• a stator rim;
• and
• a plurality of stator teeth arrayed about and internally extending from the stator rim, the stator teeth being sized to fit about the magnet in operable communication therewith for rotating the spindle motor hub, the stator teeth having laminate layers formed to a first thickness, the stator teeth having at least one reduced height stator tooth, the reduced height stator tooth having laminate layers formed to a second thickness less than the first thickness, the reduced height stator tooth being positionable adjacent the head stack assembly in a direction parallel to the axis of rotation for allowing the head stack assembly to pivot over the reduced height stator tooth.