Post by Professor Lake Shore on Jan 31, 2017 17:04:54 GMT -5
In what applications should one choose an isolated sample holder over a grounded sample holder?
An isolated holder has an electrically-isolated, thermally-conductive sample mounting surface that isolates the sample from chamber ground and is recommended for measuring samples in which a conductive path to the chamber must be broken – like doped semiconductor wafers. In contrast, the grounded holder that ships with each probe station is for more conventional measurements; it suits the needs of most device applications, especially when samples are patterned on highly insulating substrates. It is referred to as grounded because the back side of the sample is held at system ground.