5ea  Silicon nitride windows in Silicon, sample substrate. Silicon nitride coated Silicon substrate with etched apertures. Windows should appear on hexagonal grid to maximize spacing and adhere to the attached drawing as closely as is reasonable.


2ea  Aperture array, 18x25mm.  An array of apertures etching in silicon nitride coated Silicon. The wafer should be coated with a heavy metal, e.g., Tungsten, to improve opacity to X-rays.

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