A method for forming a plated magnetic thin film of high saturation magnetization and low coercivity having the general form Co100abFeaMb, where M can be Mo, Cr, W, Ni or Rh, which is suitable for use in magnetic recording heads that write on narrow trackwidth, high coercivity media. The drawer slides each have a cabinet member, an intermediate member and a chassis member. A method for selecting a position for a projection and desirable configurations of the projection are also disclosed. A plurality of conductive wires for electrically connecting the bond pads of the semiconductor die to the electrically conductive patterns are formed at a bottom surface of the substrate. The rib is uniform in shape, dimensions and wall width, and free from reduction of wall width of the inner rib, yet possessing proper structural support and mechanical strength, and excellent in impact absorbing performance.