Patent ID: 8248732

Claim:
A head-gimbal assembly comprising: a suspension; a head-slider coupled to said suspension; a magnetic-recording assistance element on said head-slider for applying an electromagnetic wave to a magnetic-recording disk to assist magnetic recording on said magnetic-recording disk; and a transmission line on said suspension for transmitting signals to said magnetic-recording assistance element, said transmission line comprising: a electrically conductive line for transmitting said signals; an upper shield placed above said electrically conductive line along said electrically conductive line; a lower shield placed below said electrically conductive line along said electrically conductive line; and a plurality of columns arranged at each of a right side and a left side of said electrically conductive line along said electrically conductive line for connecting said upper shield and said lower shield, said plurality of columns arranged at said right side comprising a right linear array of columns, and said plurality of columns arranged at said left side comprising a left linear array of columns, wherein a single hole is formed in each area between adjacent columns in said left and said right linear arrays of columns.