Patent ID: 6349456
Filing Date: 2002-02-26
Classification: H05K,Y10T

Abstract:
A method of manufacturing a circuit board, the method comprising the steps of:providing a substrate with a first conductive layer having first and second regions; applying a dielectric layer to the first conductive layer, said dielectric layer composed of a positive-acting photosensitive material; applying a second conductive layer to the dielectric layer; removing a first region of the second conductive layer to expose a first region of the dielectric layer, a second region of the second conductive layer remaining and covering a second region of the dielectric layer; irradiating and developing the dielectric layer using the second region of the second conductive layer as a photomask to remove the first region of the dielectric layer to expose the first region of the first conductive layer and curing the second region of the dielectric layer; and removing the first region of the first conductive layer.