NOVELTY - A microtip microplasma device comprises first metal microtip (12a) opposing a second metal microtip (12b) with a gap between it, where the first and second metal microtips are encapsulated in metal oxide that electrically isolates and physically connects the first and second metal microtips. The first and second metal microtips and metal oxide comprise a monolithic, unitary structure.    USE - As a microtip microplasma device, used in a purification device (claimed), displays and plasma treatment processing of gases and liquids.    ADVANTAGE - The device is inexpensive and compact for high-efficiency generation of ozone. The array is produced from a single sheet of commercially-available metal mesh with a fabrication procedure that requires only one photolithographic step.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an array of micro tip microplasma devices comprising the microtip microplasma devices, where the first metal microtip contains portion of a first electrode (18a) and the second metal microtip contains portion of a second electrode (18b), where the first and second electrodes and the metal oxide define a mesh with microscale openings in it, where the first and second electrodes contain aluminum or titanium;    (2) a purification device comprising the microtip microplasma device arranged with respect to each to successively encounter a medium to be filtered; and    (3) forming an array of microtip microplasma devices involving providing a metal mesh with an array of micro openings in it; masking electrode areas of the metal mesh and leaving planned connecting metal oxide areas of the metal mesh unmasked; electrochemically etching the planned connecting metal oxide areas to convert the planned connecting metal oxide areas to metal oxide that encapsulates opposing metal microtips in it; and removing the mask; and electrochemically etching the electrode areas to encapsulate the electrode areas in metal oxide.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional diagram of a portion of an array of microtip plasma devices.    Substrate (6)    First metal microtip (12a)    Second metal microtip (12b)    Dielectric (14)    First electrode (18a)    Second electrode (18b)    Voltage source (22)