A method of forming a silicon-on-insulator metal oxide semiconductor field effect transistor device is provided in which an implanted back-gate is formed into a Si-containing layer of an SOI wafer. The modifier contains ethylene glycol, two-hydroxy-end polyether, dimethyl terephthalate, two-polyether-end modified organosilicon, and metal acetate catalyst. In particular, surface tension from the fluid on an annular suction groove or pocket and a textured top surface of the needle holder creates a suction force applied to the needle holder. Each of the cascoded current sources comprises a current source transistor and a cascode transistor. The wheelchair can be separated from the bed body. The safety valve is situated on or near a milker unit to seal and protect downstream dairy milk lines from teat dip and cleaning fluids that are fed through the safety valve to upstream milker unit components.