Patent ID: 6677245
Filing Date: 2004-01-13
Classification: G01R,H01L,H01R,H05K

Abstract:
A method for producing a contact structure, comprising the following steps of:(a) forming a sacrificial layer on a surface of a substrate; (b) forming a photoresist layer on the sacrificial layer on the substrate; (c) aligning a photo mask over the photoresist layer and exposing the photoresist layer with ultraviolet light through the photo mask, the photo mask including an image of contactors; (d) developing patterns of the image of the contactors on a surface of the photoresist layer; (e) forming the contactors made of electric conductive material in the patterns on the photoresist layer, each of the contactors having a tip portion at one end of the contactor to contact with the contact target, a base portion at another end of the contactor, a straight body portion provided between the tip portion and the base portion, a flange at the base portion, and a spring portion provided between the tip portion and the straight body portion which has significantly smaller thickness than that of the body portion or base portion; (f) stripping off the photoresist layer; (g) removing the sacrificial layer and the conductive layer so that the contactors are separated from the silicon substrate; and (h) mounting the contactors on a contact substrate having through holes to receive ends of the contactors therein so that at least one end of each of the contactors functions as a contact pad for electric connection.