Don't kill canaries! Introducing a new test device to assess the electrostatic risk potential to photomasks

Thomas Sebald

doi:10.1117/12.801407

17 October 2008 Don't kill canaries! Introducing a new test device to assess the electrostatic risk potential to photomasks

Thomas Sebald

Author Affiliations +

Proceedings Volume 7122, Photomask Technology 2008; 71220H (2008) https://doi.org/10.1117/12.801407
Event: SPIE Photomask Technology, 2008, Monterey, California, United States

Abstract

Electrostatic protection is an issue for all masks, whether during mask production, shipping, storage, handling or inspection and exposure. Up to now, only manual electrostatic field measurements, or expensive and elaborate analyses with Canary reticles have given hints about the risks of pattern damage by ESD events. A new test device is being introduced, which consists of electrostatic field sensors, integrated INSIDE a closed fused quartz housing which has the outside dimensions of a 6 inch mask. This device can be handled and used like a normal 6 inch reticle. It can be handled and processed while recording the electrostatic charges on the chrome patterns created by friction or field induction just as a reticle would "see" during normal processing.

Citation Download Citation

Thomas Sebald "Don't kill canaries! Introducing a new test device to assess the electrostatic risk potential to photomasks", Proc. SPIE 7122, Photomask Technology 2008, 71220H (17 October 2008); https://doi.org/10.1117/12.801407

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