Patent ID: 9036303
Filing Date: 2015-05-19
Classification: G11B,H05K

Abstract:
1. A suspension for a head gimbal assembly, comprising: a flexure having a leading portion and a tailing portion opposite to the leading portion; and a plurality of electrical traces formed above the flexure and extending from the leading portion to the tailing portion, the electrical traces with a multiple-layer structure comprising a positive write trace and a negative write trace; wherein the positive write trace is divided into at least two positive write trace sections located at an upper trace layer and a lower trace layer respectively, and the negative write trace is divided into at least two negative write trace sections located at the upper trace layer and the lower trace layer respectively, each positive write trace section and each negative write trace section are alternately arranged along a longitudinal direction on both the upper trace layer and the lower trace layer, and the positive write trace sections at different layers are connected together via conductive crossovers formed between the upper trace layer and the lower trace layer, and the negative write trace sections are connected together via conductive crossovers formed between the upper trace layer and the lower trace layer; wherein the total lengths of all positive write trace sections on the upper trace layer or on the lower trace layer are the same, and the total lengths of all negative write trace sections on the upper trace layer or on the lower trace layer are the same, such that the total distance for either positive signal propagating or negative positive signal propagating in the upper trace layer is equal to that in the lower trace layer.