Laminated hard disk head suspension and etching process

摘要

A suspension system for disk drives is formed out of a multi-layer metal laminate. An etch-retardant layer is received between two outer metal layers at a pre-determined depth from the outer surfaces of the metal layers. Utilizing conventional photo-chemical etching process techniques, the etch retardant layer stops or retards the chemical etching at this pre-determined depth. In this manner, the inherent variably in etch rate is controlled, permitting the formation of finer geometries in the head suspension than would be otherwise possible.