Patent ID: 6750148
Filing Date: 2004-06-15
Classification: C23F,G11B,H05K

Abstract:
A method of manufacturing a wireless suspension blank, said method comprising the steps of:providing a three-layer laminate including a metallic layer having spring properties, a conductive layer laminated on the metallic layer through an electrically insulating layer, the insulating layer including a core-insulating layer and adhesive layers disposed on opposite sides of the core-insulating layer; photo-etching the metallic layer and the conductive layer; after said step of photo-etching, forming respective resist patterns on the metallic layer and the conductive layer on sides thereof facing away from the insulating layer; and after said step of forming, wet etching the insulating layer through the respective resist patterns such that a ratio of higher etching rate to lower etching rate of the respective layers of the insulating layer is between 6:1 and 1:1.