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  2. Deep reactive-ion etching - Wikipedia

    en.wikipedia.org/wiki/Deep_reactive-ion_etching

    Both Bosch and cryogenic processes can fabricate 90° (truly vertical) walls, but often the walls are slightly tapered, e.g. 88° ("reentrant") or 92° ("retrograde"). Another mechanism is sidewall passivation: SiO x F y functional groups (which originate from sulphur hexafluoride and oxygen etch gases) condense on the sidewalls, and protect ...

  3. Bosch - Wikipedia

    en.wikipedia.org/wiki/Bosch

    Bosch Palace, the official residence of the U.S. ambassador to Argentina; Huis ten Bosch, an official palace of the Dutch royal family in The Hague, Netherlands; Huis Ten Bosch Station, a train station for the theme park and train service of the same name in Japan

  4. Don't Open the Door! - Wikipedia

    en.wikipedia.org/wiki/Don't_Open_the_Door!

    Don't Open the Door!, also known as Don't Hang Up, [2] is a 1974 American horror film, directed by S. F. Brownrigg and starring Susan Bracken, Larry O'Dwyer, and Gene Ross. . Its plot follows a young woman who returns to her hometown to care for her ailing grandmother, where she is tormented by disturbing phone calls from a deranged man