Patent ID: 6225031
Filing Date: 2001-05-01
Classification: G03F,H01L,H05K,Y10S,Y10T

Abstract:
A process for filling apertures in a circuit board or chip carrier with a cured photosensitive dielectric material, comprising the steps of:filling the apertures in the circuit board or chip carrier and applying a layer having a thickness to the circuit board or chip carrier, with a positive photosensitive dielectric material;exposing the photosensitive dielectric material to actinic radiation at an intensity and duration effective for causing the photosensitive dielectric material to be exposed to a depth of the thickness on the circuit board or chip carrier while leaving photosensitive dielectric material located in apertures unexposed to the actinic radiation;baking to cure the unexposed photosensitive dielectric material located in the apertures;developing the exposed material to remove it to the depth on the circuit board or chip carrier, thereby leaving behind cured photosensitive dielectric material located in the apertures.