| 摘要 |
A method in which a monocrystalline body is subjected in a gas atmosphere to a treatment for changing the thickness of the body, in which the thickness of the body is controlled by means of a measuring member which is subjected to the same treatment and which measuring member, on its side which is subjected to the treatment, consists of a monocrystalline layer and an adjoining substratum of a material having a refractive index differing of that the monocrystalline layer material. The measuring member is obtained by providing a substrate, depositing the monocrystalline layer on the substrate, forming the substratum on the monocrystalline layer, and then removing the substrate to form the measuring member.
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