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Mask writers, photomasks and display production

Why the need for laser-based mask writers for production of photomasks for high-resolution displays?

Text: Mycronic

Photo: Mycronic

Sophisticated displays have become a natural part of our society, and global electronics manufacturers are constantly improving the display quality of mobile phones, tablets, TVs, and computers to give customers a better experience.

Technological development in the display industry is continuing at a rapid pace, with more and smaller pixels. The trend is heading in the direction of more complex display technologies such as AMOLED, which means that both additional photomasks and more complex photomasks are needed in order to manufacture displays.

Photomasks are absolutely crucial for the mass production of displays and Mycronic’s laser-based mask writers for manufacturing photomasks hold the unique position as the world’s only supplier of the mask writers used to manufacture the advanced photomasks needed for the volume production of displays.

The need for photomasks is driven primarily by technology shifts such as new display designs/models, the transition from LCD to AMOLED, larger displays, greater demand for higher resolution, and displays in new applications. Around 18,000 display photomasks were produced globally in 2019, while the number of displays manufactured totaled 3.6 billion units.

Learn about our mask writers

Mycronic’s mask writers write with nanometer precision, with an accuracy of one millionth of a millimeter. This is indispensable for creating a high-quality image experience.

What is a photomask?

A photomask can be compared to a photo negative. A pattern is written with a Mycronic mask writer and transferred to the end product by a lithographic process. The photomask consists of a transparent substrate of glass or quartz that is covered with a thin layer of chrome and a layer of photoresist. Photoresist is a light-sensitive material that can be developed and then washed away after exposure to light. After writing, the photoresist is developed and the pattern is transferred to the chrome layer by etching.

Process for producing photomasks

Photomask production

Text: Mycronic

Photo: Mycronic

Published: 13 5월 2020


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