Patent ID: 6046071
Filing Date: 2000-04-04
Classification: H01L,Y10T

Abstract:
A method of manufacturing a plastic molded semiconductor package, which method comprises:preparing an insulating sheet provided with a penetration bump having ends, at least one of which is protruded from a surface of said insulating sheet;joining one end of said penetration bump to a pad electrode formed on a main surface of a semiconductor chip;encapsulating said semiconductor chip with resin while holding said insulating sheet; andcutting said insulating sheet at a predetermined portion to form an end surface of said insulating sheet which is substantially coplanar with a surface of said molding resin, wherein said penetration bump has a first conductor protruded from a surface of said insulating sheet and a second conductor protruded from a rear surface of said insulating sheet, andsaid step of preparing said insulating sheet having said penetration bump includes the steps of,forming a conductive layer on said rear surface of said insulating sheet,forming a first mask layer on said conductive layer, said first mask layer including a first opening which has a first opening width and exposes a portion of a surface of said conductive layer,effecting electroplating using said first mask layer as a mask to form a second conductor in said first opening,forming a second mask layer on said surface of said insulating sheet, said second mask layer including a second opening which has a second opening width smaller than said first opening width,etching said insulating sheet using said second mask layer as a mask to expose a portion of said surface of said conductive layer,effecting electroplating using said second mask layer as a mask to form a first conductor in said second opening, andremoving said first and second mask layers.