Stainless steel foil for flexible display use
AssigneeNippon Steel Materials Co., Ltd.
InventorsNoriko Yamada, Toyoshi Ogura, Yuji Kubo, Shuji Nagasaki
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Abstract
The present invention provides stainless steel foil for flexible display use which enables fabrication of a TFT substrate for display use which is superior in shape recovery after being rolled up or bent and which is high in surface flatness and is characterized by having a thickness of 20 μm to 200 μm, a surface roughness Ra of 50 nm or less, and a shape recovery of a distortion angle of 10° or less after being wound around a 30 mm diameter cylinder.
Claims6
1-3. (canceled)
A method for producing a stainless steel foil for flexible display use having a thickness of 20 μm to 200 μm, a surface roughness Ra of 50 nm or less and a shape recovery of a distortion angle of 10° or less after being wound around a 30 mm diameter cylinder, comprising
- applying superbright finishing to a stainless steel sheet without bright annealing, wherein said superbright finishing comprises foil-rolling the stainless steel sheet using flat rolls lapped with #1000 or finer abrasive in at least a final pass of foil rolling.
Dependencies are inferred from the claim text.