An apparatus produces a member having hidden information in which a sheet of conceal paper for hiding the information and a sheet of recording paper having an image recorded thereon are bonded releasably. The apparatus includes a recording paper supply section, a conceal paper supply section, and a fixing section. The recording paper supply section supplies the sheet of recording paper. The conceal paper supply section supplies the sheet of conceal paper. The fixing section fixes the image, which is formed on the sheet of recording paper supplied from the recording paper supply section, onto the sheet of recording paper, and bonds the sheet of conceal paper supplied from the conceal paper supply section to the sheet of recording paper simultaneously.

 
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> Method for annealing silicon thin films and polycrystalline silicon thin films prepared therefrom

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