Balancer, head stack assembly with the same, and method for manufacturing the balancer and overmold of the head stack assembly

摘要

A balancer installed on an overmold of a head stack assembly to adjust balance of the head stack assembly is formed of stainless steel and demagnetized through a thermal treatment after the stainless steel is processed to have a balancer shape. A method for manufacturing a balancer includes processing stainless steel to have a balancer shape, and demagnetizing the stainless steel having the balancer shape through a thermal treatment. A method for manufacturing an overmold of a head stack assembly includes processing stainless steel to have a balancer shape and demagnetizing the stainless steel having the balancer shape through a thermal treatment, placing the balancer inside a mold, and filling the inside of the mold with liquid resin and solidifying the liquid resin to form the overmold.