Patent ID: 8337646
Filing Date: 2012-12-25
Classification: H05K,Y10T

Abstract:
1. A method for filling vias in a greensheet comprising: securing and positioning a product greensheet having circuit patterns with screened lines and one or more vias to be filled to a plate having a central opening, wherein one or more of the screened lines have a height extending beyond a surface of the product greensheet; determining the position of the via to be filled in the product greensheet; positioning a backing filler die having a central support punch under the via to be filled, the central support punch of the backing filler die having a solid flat surface so that the solid flat surface of the central support punch is within the central opening of the plate and is under and flush to the via to be filled, the central support punch residing a fixed offset distance above a surface of the backing filler die thereby avoiding contact with the screened lines; positioning a transfer greensheet having a fixed array of filled vias over the via to be filled, with one of the filled vias being positioned over the via to be filled in the product greensheet; positioning a punch head over the via to be filled and the filled via of the transfer greensheet; activating the punch head to punch the transfer greensheet via to fill or partially fill the product greensheet via whereby the solid flat surface of the central support punch remains under and flush to the via being filled to support the fill of the via; and repeating the above steps for all the vias to be filled in the product greensheet.