Good morning everyone. We are interested in equipment for grinding/polishing. -We need to produce wafers as thin as 50um -We need to produce wafers with TTV<1 and and preferably, flatness less than about 300nm over an area of 30x10 mm -We don't need fully automated equipment, cos this tool will be used for R&D purposes. -We can accept to buy used and refurbished equipment I'm looking for suggestions about possible brands and sellers of this kind of equipment. Many thanks, Andrea