POH is a company of Plan Optik Group. As the holding company of the Group, Plan Optik AG is the leading manufacturer of structured wafers when it comes to technology. In sectors such as consumer electronics, automotive, aerospace, chemistry and pharmaceuticals these wafers are essential components used as active elements for numerous applications in MEMS technology. The wafers of glass, glass-silicon compounds or quartz are available in sizes up to 300 mm diameter. Wafers by Plan Optik provide high-precision surfaces in the ångström range (= ten millionths of a millimetre), which are achieved through the use of the MDF polishing process developed by the company. Plan Optik wafers are available to minimum tolerances with application-specific structuring and complex material combinations.

With its subsidiary companies Little Things Factory and MMT, Plan Optik also covers the microfluidics sector, where it is one of the few companies offering complete systems. This is a field in which increasing application possibilities are being developed, for example in medicine and chemistry. It thus offers a growth potential which is approximately as high as the previous core business, wafer technology.