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2. Photomask - Wikipedia

   en.wikipedia.org/wiki/Photomask

   Photomask. A photomask. A schematic illustration of a photomask (top) and an IC layer printed using it (bottom) A photomask (also simply called a mask) is an opaque plate with transparent areas that allow light to shine through in a defined pattern. Photomasks are commonly used in photolithography for the production of integrated circuits (ICs ...

3. Mask - Wikipedia

   en.wikipedia.org/wiki/Mask

   A " facial " (short for facial mask) is a temporary mask, not solid, used in cosmetics or as therapy for skin treatment. A "life mask" is a plaster cast of a face, used as a model for making a painting or sculpture. An animal roleplay mask is used for people to create a more animal-like image in fetish role play.

4. Phase-shift mask - Wikipedia

   en.wikipedia.org/wiki/Phase-shift_mask

   A conventional photomask is a transparent plate with the same thickness everywhere, parts of which are covered with non-transmitting material in order to create a pattern on the semiconductor wafer when illuminated. In alternating phase-shift masks, certain transmitting regions are made thinner or thicker. That induces a phase-shift in the ...

5. Face masks during the COVID-19 pandemic in the United States

   en.wikipedia.org/wiki/Face_masks_during_the...

   Timeline CDC poster recommending the use of non-medical face masks to slow transmission of COVID-19. 2020 Early recommendations. Initially, the U.S. government did not recommend the use of face masks by the general public outside of medical settings to protect themselves from COVID-19, as to prevent shortages of medical-grade personal protective equipment (PPE) for doctors treating COVID-19 ...

6. 14 Disposable Face Masks To Protect You From The Newest ... - AOL

   www.aol.com/14-disposable-face-masks-ll...

   Shopping for a disposable face mask to protect you from the new COVID-19 variants in 2023? Start with these options that have rave reviews on Amazon.

7. Face masks during the COVID-19 pandemic - Wikipedia

   en.wikipedia.org/wiki/Face_masks_during_the...

   During the COVID-19 pandemic, face masks or coverings, including N95, FFP2, surgical, and cloth masks, have been employed as public and personal health control measures against the spread of SARS-CoV-2, the virus that causes COVID-19 . In community and healthcare settings, the use of face masks is intended as source control to limit ...