A vehicle platooning control system is a vehicle platooning control system that controls a relative relationship between vehicles so that a plurality of vehicles runs in a row. The method can include selectively injecting fluorine into a first region on a substrate and avoiding injecting the fluorine into a second region on the substrate. Raman pump light at a second wavelength or wavelengths may be used to optically pump the fiber to produce Raman gain for channels at different wavelengths in the communications link. The active layer of the at least one selection transistor may contain an oxide. These switches have outputs electrically coupled by diodes to the plurality of word lines. In the following chemical formula, R1s each are independently an alkyl group having 8 to 30 carbon atoms, R2s each are independently hydrogen or a methyl group, As each are independently an alkylene group having 2 to 4 carbon atoms or a substituted alkylene group, and ns each are independently an integer from 0 to 200.