Patent ID: 6014318
Filing Date: 2000-01-11
Classification: H01L

Abstract:
A ball grid array package, comprising:a ball electrode that connects to an outside wiring on a bottom face of a multi-layer wiring substrate;said multi-layer wiring substrate having a concave part on a surface opposite said bottom face, said concave part defined by side portions and a planar portion between said side portions;a semiconductor chip mounted at said planar portion using a fixing material, said planar portion including a first area defined as an area of the wiring substrate between said wiring substrate and said semiconductor chip and a second area defined as an area of said planar portion located on a perimeter of said first area; anda sealing material that seals an upper surface of said package including said semiconductor chip and sides of said wiring substrate, wherein a plurality of holes are provided in said wiring substrate and act as an exhaling route to exhale vapor at the time of vapor-phase expansion of water that has infiltrated into an inside of said package, said plurality of holes being provided at least in said second area of said planar portion of said concave part of said wiring substrate.