{"id":19274,"date":"2026-02-18T15:55:33","date_gmt":"2026-02-18T20:55:33","guid":{"rendered":"https:\/\/blog.wika.com\/us\/?p=19274"},"modified":"2026-02-20T13:36:41","modified_gmt":"2026-02-20T18:36:41","slug":"uhp-pressure-instruments-semiconductor-manufacturing","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/us\/applications\/uhp-pressure-instruments-semiconductor-manufacturing\/","title":{"rendered":"The Importance of UHP Pressure Instruments in Semiconductor Production"},"content":{"rendered":"
The production of advanced chips demands an ultra pure environment, from the gases used during manufacturing to the final packaging of the products. UHP pressure transducers and UHP pressure gauges, such as the ones designed and manufactured by WIKA, play a critical role in ensuring quality and safety.<\/span><\/b><\/div>\n
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The semiconductor industry is among the few that require all components and equipment to be ultra high purity (UHP), and for manufacturing processes to be carried out in specialized cleanrooms. This is because even trace amounts of unwanted contaminants in the environment can cause defects in microchips.<\/p>\n

Thus, the instruments, gases, and solvents used during fabrication \u2013 such as for the chemical vapor deposition (CVD) of various materials onto silicon wafers \u2013 must be ultra high purity. Many of these chemical compounds are also highly aggressive, toxic, and even pyrophoric (spontaneously igniting at room temperature). Needless to say, leak tightness is a major safety consideration during manufacturing processes.<\/p>\n

Pressure Instruments for Semiconductor Fabrication Plants<\/h2>\n

Pressure gauges and pressure transducers are found throughout the semiconductor manufacturing process. These instruments are responsible for monitoring and controlling the pressure of solvents, forming gases, cleaning gases, and other critical fluids. But not just any gauge or sensor will do. For quality assurance, process optimization, and the protection of both people and the environment, the instruments used in fab facilities need to meet three key criteria for purity and leak tightness.<\/p>\n

1. UHP material selection and finishing<\/h3>\n

Corrosion contaminates processes and enables fugitive emissions, while rough surfaces contain microscopic spaces that trap impurities. To meet the UHP requirements of semiconductor fabrication, WIKA uses especially high-quality stainless steel produced by double melting \u2013 vacuum induction melting (VIM) and vacuum arc remelting (VAR) \u2013 to produce an extremely homogeneous and inclusion-free alloy that meets the SEMI F20 specification for use in UHP semiconductor manufacturing applications.<\/p>\n

The \u201cdouble melts\u201d then undergo electropolishing to ensures that surfaces are as smooth and uniform as possible. This entails putting the work pieces in an electrolyte solution and connected as an anode. The resulting electrochemical reaction does two things:<\/p>\n