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              光盤鍍層厚度檢測-capa

              時間:2017-02-27      來源:蘇州迪森特      關鍵詞:蘇州迪森特      瀏覽量:1594


              光盤鎳層厚度測量

              我們日常生活中大量使用CDs, DVDs, HD-DVDs 還有藍光光盤存儲數據。這些光盤的基材(硅或玻璃)表面,需要附上一薄層鎳。鎳層的厚度需要得到測量,用以控制電鍍過程。德國米銥公司提供的電容式位移傳感器被用來測量鎳層厚度和外輪廓。兩個探頭分別位于被測光盤上下兩端,移動被測光盤,就可以得到測量結果。用兩支電容式位移傳感器測量結果相減,可以得到非常準確的厚度數值。

              Previously, the data was transferred to a master system using a laser to reproduce CDs, DVDs, HD-DVDs or Blu-ray discs by pressing. A thin layer of nickel is applied using galvanisation to the silicon or glass carrier (substrate). The absolute thickness values of the nickel layer are required in order for the exact control of the galvanisation bath. Capacitive sensors from Micro-Epsilon are used to measure the thickness and profile.  A sensor is positioned above and below the die, which is then moved between the sensors during measurements. Using the two units for distance information, the thickness is determined very precisely using the differential method.


                     

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