Abstract: In accordance with the production process according to the present invention, a stamper having a desired pattern for the formation of a disc board can be produced without worsening the working atmosphere or causing any other problems. A novel process for the production of a stamper for the formation of a disc board is provided, which comprises applying an adhesive tape to the surface of a stamper body on which an unnecessary resist remains, and then peeling the adhesive tape off the stamper body so that the unnecessary resist is transferred to the adhesive tape to remove itself from the stamper body.

Abstract: A pressure-sensitive adhesive or pressure-sensitive adhesive tape for removing a foreign matter present on the surface of an article from the article, the pressure-sensitive adhesive having the property of curing with an actinic energy source to have a three-dimensional network molecular structure, a modulus of elasticity (as measured in accordance with JIS K 7127) before the curing of lower than 1 kg/mm.sup.2 and a modulus of elasticity after the curing of 1 kg/mm.sup.2 or higher, and a degree of volumetric shrinkage through the curing of 2% or higher.

Abstract: A method of stripping off a wafer-protective sheet which comprises bonding an electrically conductive continuousform stripping tape comprising a flexible substrate to, through a pressure-sensitive adhesive layer, an electrically conductive protective sheet applied to a semiconductor wafer on its side where a circuit pattern has been formed, and then peeling the stripping tape from the semiconductor wafer thereby to strip the protective sheet from the semiconductor wafer, said bonding and peeling of the stripping tape being conducted automatically by means of an automatic stripping system while the protective sheet is kept being grounded through the stripping tape.