SECONDARY MEMORY DEVICE

摘要

The present invention relates to an auxiliary memory device. More specifically, the provided auxiliary memory device includes: a substrate which includes a first area with a first semiconductor device mounted on and a second area with a second semiconductor mounted on; and a housing which can store at least a part of the substrate. The housing includes a first sub-housing covering the first area, and the first sub-housing passes the upper portion of the first semiconductor device and extends to the second area. The auxiliary memory device can ensure a device vulnerable to heat to be able to perform without being affected by heat to enhance the overall performance of the auxiliary memory device.