A description is given of the electrical properties of formed point contacts on germanium. A useful technique for observation of the equipotentials surrounding such contacts is described. The contrasting properties of donor‐free and donor‐doped contacts, used as diodes or transistor collectors are emphasized.
It is shown that unformed point contacts (which have electrical properties largely determined by a surface barrier layer), may exhibit analogous differences. Such changes are produced by chemical treatments calculated to influence properties of a soluble germanium oxide film on the surface.
The above information is applied to a study of transistor forming as it is done in present point‐contact transistor processing. It is shown that high yields from the forming process can be expected on oxidized surfaces, and that chemical washes which remove soluble germanium, oxide drastically lower forming yields. These and other effects are evaluated as sources of variability in forming yield.
Water cress, duck weed, frog spittle, slime wort, bladder wort, water weed. ANIMALS. Water scavenger beetle, back swimmer, water scorpions, water bugs, mosquito larvae, water boatmen, nymphs of dragon and damsel flies, nymph of May flies, caddice larvae. ANTS. An ant's nest in a school room is a source of much interest and delight. An artificial nest can be cheaply and easily constructed. Partially fill a tin or galvanized iron pan 12xl5x2-|-inches with water.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.