| 摘要 |
<p>The method is for producing a plate capacitor comprises stamping two capacitor plates (1, 2) from a sheet of, e.g. tinplated iron or brass respectively of several hundredths or tenths of a mm thick. A granular dielectric material slice is located between the two plates and the sandwich heated to soften the dielectric. Pressure is then applied across the sandwich while heated to reduce the thickness to several tens of microns and thus produced sandwiches stacked to provide a capacitor. Iron has the advantage of a relatively low thermal conductivity which aids soldering on printed circuit boards, and a high specific heat and is also a magnetic material. This last point enables the plates to be retained accurately in position and avoid slippage by the use of electromagnets when pressure is applied to the sandwich. Thus the accuracy of the formed capacitance is reasonably assured. Control is also obtained by applying pressure using a servomotor controlled in accordance with the capacitance measured across the plates.</p> |
