| 摘要 |
1,098,554. Electric solid-state devices. FORD MOTOR CO. Ltd. Feb. 16, 1966 [March 5, 1965], No. 6758/66. Heading H1K. [Also in Division H3] A transducer consisting of a conducting film 4 on a ferroelectric body 1 operates on the principle that the charge carrier density in the film depends on the state of polarization of the body. The illustrated device consists of a barium titanate body 1 polarised by a potential applied between terminal 3 and one or both terminals 5, the changed charge carrier density in the film 4 being detected as a change in resistance between the terminals 5. Gold and bismuth are quoted as suitable film materials for such a device. A device consisting of a film or films of tin on a body of triglycine phosphate is also described, the change in charge carrier density in the tin being used to bring about a change in its superconductive transition temperature. The Specification also mentions the following properties related to charge carrier density and which could therefore constitute the controlled variable in a device according to the invention: Hall voltage, transmission and reflectance of light, Curie temperature (of a ferromagnetic material), Mossbauer effect. Other possible film materials are antimony, arsenic and selenium; another possible body material is potassium dihydrogen phosphate. |
