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    月月娱乐



    Multi-tone Photomasks to Increase Production Efficiency and Quality of Panels

    Compared to a set of conventional photomasks, a smaller number of multi-tone photomasks can transfer the same number of patterns to glass substrates. For this reason, multi-tone photomasks can reduce the number of manufacturing processes required to make LCDs and thus increase production efficiency. Multi-tone photomasks can also enhance the display quality because they can create halftones.

    At SK-Electronics, we currently provide multi-tone photomasks for large-sized LCDs, but we intend to apply the multi-tone photomask technologies for other displays and electronic devices at the request of our customers.

    What are multi-tone photomasks?

    Multi-tone photomasks are classified into two types: gray-tone and half-tone masks. Gray-tone masks make semi-exposure possible by shielding part of the light with slit patterns that are finer than the resolution provided by conventional exposure equipment. Half-tone masks use semitransparent film to make semi-exposure possible. Either type can create three levels of exposure on glass substrates in one round of exposure: fully exposed, semi-exposed, and non-exposed areas. By selecting one of the multi-tone photomasks, the photoresist can be left on glass substrates in two thicknesses. Using the difference between these thicknesses, a smaller number of multi-tone photomasks can transfer patterns to glass substrates and thus increase the production efficiency of LCDs.

    Gray-tone mask 

    A gray-tone mask makes semi-exposure possible by shielding part of the light with slit patterns that are finer than the resolution provided by conventional exposure equipment.


    Half-tone mask 

    A half-tone mask uses semitransparent film to make semi-exposure possible.


     

     

    月月娱乐