A sense amplifier for a memory includes a comparator and a bit line polarization circuit. When disposed on the plate, the retention devices magnetically adhere the plate to the underlying cylinder. Good disease tolerance including resistance to Black Spot has been observed. The light-attenuating composition attenuates light in at least the UV range and is water-soluble or water-dispersible. The tool feeding speed profile can be programmed, in particular, as a linear, polynomial, or cubic feeding speed profile, the latter being predefinable over a sequence of control blocks as a feeding speed polynomial or a feeding speed spline by interpolation or approximation. An array element is on an inner surface of the second substrate.