Patent ID: 6780565
Filing Date: 2004-08-24
Classification: C03C,H05K

Abstract:
A method for manufacturing a multilayered interconnected circuit board, comprising:applying a photosensitive glass paste to an insulating substrate having a conductive lead and drying the photosensitive glass paste, wherein said photosensitive glass paste comprises an inorganic component comprising a glass powder and a photosensitive organic component, and wherein the glass powder comprises: (a) about 1 to 30 percent by weight of a low melting point glass powder having a glass softening point in the range of about 400Â° C. to 600Â° C.; and (b) about 70 to 99 percent by weight of high melting point glass powder having a glass softening point at least about 300Â° C. higher than the glass softening point of the low melting point glass; exposing and developing the photosensitive glass paste so as to form a via hole pattern; and applying a conductive paste to the via hole pattern and firing the conductive paste so as to form an insulating layer having via holes.