Patent ID: 9269657
Filing Date: 2016-02-23
CPC Classification: H01L

Claim Text:
1. A flexible stack package comprising: a first unit package and a second unit package which are sequentially stacked, each of the first and second unit packages having a fixed area and a floating area; a fixing part that connects and fixes each fixing portions of the fixed areas of the first and second unit packages, wherein each of the first and second unit packages includes a lower flexible layer, an upper flexible layer on the lower flexible layer, and a chip between the lower and upper flexible layers; and a plurality of first contact protrusions that protrude from a bottom surface of the floating area of the first unit package toward a top surface of the floating area of the second unit package, wherein the plurality of first contact protrusions is configured to conduct force applied to the floating area of the first unit package to the floating area of the second unit package, wherein the plurality of first contact protrusions is fixed on the bottom surface and is not fixed with the top surface of the floating area of the second unit package, and wherein the plurality of first contact protrusions is capable of sliding along a surface of the upper flexible layer.