Semiconductor device, semiconductor device substrate, and methods of fabricating the same

A fabricating method of a semiconductor device fabricated by forming at least one cavity portion on a semiconductor device substrate, mounting at least one semiconductor chip in said cavity portion, and sealing with sealant, said semiconductor device substrate comprising the steps of:

• pressing to adhere a squeeze shapeable wiring construction body to a resin substrate, said wiring construction body having a multiple layer structure comprising at least the first metal layer which is used as a wiring portion and the second metal layer which functions as a carrier layer, while forming a cavity portion said resin substrate;
• and
• removing the metal layers except the first layer, wherein:
• said wiring, which is buried in the resin substrate surface and wall surface of said cavity portion, is formed and disposed along said resin substrate surface and said wall surface of said cavity portion;
• said wiring comprising an external connection portion for connecting to external connection terminals disposed on a surface of said resin substrate on a side of said cavity opening, an inner connection portion for connecting to a semiconductor chip to be mounted, and a wiring between said external connection portion and said inner connection portion;
• and
• a depth of said cavity portion is determined based on a height of said external connection terminal.