Micro-speaker and method for assembling a micro-speaker

A method of assembling a vibration system of a micro-speaker to a driver unit of said micro-speaker, said method comprising:

• disposing a quantity of volatile magnetic fluid into a radial gap of said driver unit;
• aligning said vibration system with said driver unit wherein a voice coil of said vibration system is accommodated into said radial gap;
• fixing said vibration system to said driver unit;
• and
• evaporating substantially all of a volatile component of said volatile magnetic fluid from said radial gap.

A micro-speaker comprising:

• a driver unit having a support frame with a central portion forming a housing, a magnet secured on one end to a bottom of said housing such that a radial gap is formed between said magnet and a circumferential wall of said housing, and a magnetic plate secured to the other end of said magnet;
• a vibration system having a diaphragm and a voice coil attached to one side of said diaphragm wherein said vibration system is fixed to said driver unit and said voice coil is suspended in said radial gap;
• and
• a volatile magnetic fluid temporarily disposed in said radial gap about said voice coil, said volatile magnetic fluid having a volatile carrier liquid.