Abstract: A spindle motor includes a base member including an installation member formed of a magnetic material, a sleeve fixedly coupled to a mounting part provided in the base member, a shaft rotatably installed in a shaft hole of the sleeve, a rotor hub installed on an upper end portion of the shaft to rotate together with the shaft, a driving magnet fixedly coupled to a lower surface of the rotor hub, and a coil fixedly coupled to the installation member so as to be disposed to face the driving magnet.

Abstract: There is provided a spindle motor including: a base member including an installation part extended upwardly in an axial direction and a coupling hole formed to be disposed around the installation part; a stator core including winding grooves into which a coil is inserted and wound therearound and protrusion parts formed on a surface opposite to a surface in which the wounding groove is formed, and fixedly installed in the installation part; and a strength reinforcing member including a concave groove formed therein so as to be disposed to face the protrusion part, and coupled to the coupling hole in order to reinforce strength of the base member.

Abstract: There are provided a base assembly for a motor and a fan motor including the same. The base assembly includes; a holder including a shaft system of the motor mounted therein and a stator for providing rotational driving force to a rotating member; an extension member mounted on the holder and extended to an upper portion of the stator; and an attractive magnet positioned above the extension member in an outer diameter direction to thereby prevent excessive floating of the rotating member.

Abstract: There is provided a bearing assembly including: a sleeve supporting a rotation of a shaft via dynamic fluid pressure generated in oil interposed therebetween; a boss rotating together with the shaft; and a sealing part including an oil sealing part disposed above the sleeve to seal the oil between the oil sealing part and the shaft and a gap forming part extended upwardly in an axial direction from the oil sealing part to form a gap preventing a leakage of the oil between the gap forming part and the boss.

Abstract: There are provided a base assembly for a motor and a fan motor including the same. The base assembly includes; a holder including a shaft system of the motor mounted therein and a stator for providing rotational driving force to a rotating member; an extension member mounted on the holder and extended to an upper portion of the stator; and an attractive magnet positioned above the extension member in an outer diameter direction to thereby prevent excessive floating of the rotating member.

Abstract: A rotor, vibration motor having the same, and fabrication method thereof are disclosed. A rotor according to an embodiment of the invention comprises a first layer on which are formed a plurality of commutators, a second to an n-th layer—wherein n is 4 or greater—on which are formed a plurality of patterned coils that are connected with the commutators, insulation layers interposed in-between the first to the n-th layers; blind via holes which connect the commutators of the first layer with the patterned coils formed on the second layer and which connect the patterned coils formed on the (n?1)-th layer with the patterned coils formed on the n-th layer, and a plurality of through holes which connect the patterned coils formed on the second to the (n?1)-th layers, where the patterned coils located on the second to the (n?1)-th layers are connected by means of different through holes.

Abstract: A rotor, vibration motor having the same, and fabrication method thereof are disclosed. A rotor according to an embodiment of the invention comprises a first layer on which are formed a plurality of commutators, a second to an n-th layer—wherein n is 4 or greater—on which are formed a plurality of patterned coils that are connected with the commutators, insulation layers interposed in-between the first to the n-th layers; blind via holes which connect the commutators of the first layer with the patterned coils formed on the second layer and which connect the patterned coils formed on the (n?1)-th layer with the patterned coils formed on the n-th layer, and a plurality of through holes which connect the patterned coils formed on the second to the (n?1)-th layers, where the patterned coils located on the second to the (n?1)-th layers are connected by means of different through holes.

Abstract: An eccentric rotor and a vibration motor having the rotor are disclosed. In one embodiment, the eccentric rotor comprises: a board with an insertion hole, patterned coil layers on the upper portion of the board having multiple patterned coils and stacked in several layers, and commutators formed on the lower portion of the board electrically connected to the patterned coils and formed in integer multiples of the patterned coils, wherein the board is eccentric with regards to the insertion hole. In one embodiment, the eccentric rotor and vibration motor having the rotor can significantly increase the amount of vibration even with a small volume, as well as reduce manufacture time and costs.