Patent ID: 8216876

Claim:
A production method for a flexible semiconductor substrate having a flexible substrate and a semiconductor device formed on the flexible substrate, comprising: (a) a step of providing an inorganic substrate; (b) a step of forming a polyimide layer on the inorganic substrate by using a material in solution form, the polyimide layer having a thickness of less than 10 μm; (c) a step of, after step (b), forming the semiconductor device on the polyimide layer; and (d) a step of, after step (c), removing the polyimide layer from the inorganic substrate, further comprising: (e1) a step of, after step (c) and before step (d), forming a polyparaxylene resin layer on the semiconductor device, the polyparaxylene resin layer having a thickness which is equal to or greater than a thickness of the polyimide layer; or (e2) a step of, after step (d), forming a polyparaxylene resin layer on an opposite side of the polyimide layer from the semiconductor device, the polyparaxylene resin layer having a thickness which is equal to or greater than a thickness of the polyimide layer.