Patent ID: 6818989
Filing Date: 2004-11-16
Classification: H01L

Abstract:
A BGA type semiconductor device comprising:(i) a BGA type interposer comprising: a tape substrate formed of a resin insulating film; a wiring pattern, formed of a metal foil, provided on one side of the tape substrate; a bonding pad, for connection to a semiconductor, provided on one end of the wiring pattern; a solder ball mounting pad provided on the other end of the wiring pattern or in a portion between both ends of the wiring pattern; an insulating film provided on the surface of the wiring pattern in the region of the solder ball mounting pad while leaving a via hole for a solder ball; a window hole for wire bonding of the bonding pad to an electrode in a semiconductor element; a striped shaped groove portion which is a smaller-thickness portion of the insulating film provided in a part of the insulating film along the window hole and is formed between the window hole and the solder ball mounting pad, the striped shaped groove portion having a wall continuously formed on the side of the window hole, for preventing the flow of a mold resin into the via hole for a solder ball; (ii) a semiconductor element, provided with an electrode, mounted on the tape substrate, in the interposer, on its side remote from the wiring pattern, said electrode in the semiconductor element having been wire bonded to the bonding pad thru the window hole, the connection between the bonding pad and the semiconductor element having been sealed with a mold resin by pouring the mold resin into the window hole while preventing the flow of the mold resin into the via hole for a solder ball by the groove portion; and (iii) a solder ball mounted on the solder ball mounting pad.