Semiconductor storage device and method for producing the same

A method for producing a semiconductor storage device, comprising:

• providing the semiconductor storage device including:
• a controller package having a BGA terminal on a bottom surface thereof;
• and
• one or a plurality of memory packages each including a plurality of semiconductor storage elements and mounted on the controller package;
• wherein the controller package includes:
• a bottom substrate having the BGA terminal on a bottom surface thereof;
• a power supply IC, mounted on the bottom substrate, for supplying a plurality of power supplies;
• and
• a controller mounted on the bottom substrate and operable by the plurality of power supplies supplied from the power supply IC, the controller providing an interface with an external system via the BGA terminal and controlling a read operation from the semiconductor storage elements and a write operation to the semiconductor storage elements;
• wherein a memory terminal pattern for mounting the one or plurality of memory packages thereon is formed on a top surface of the controller package, the memory terminal pattern being connected to the controller;
• and
• stacking and connecting the controller package selected as being good by a first test and the one or plurality of memory packages selected as being good by a second test.