摘要:
An improved electric device and manufacturing method for the same are described. The device is, for example, an IC chip clothed with moulding. In advance of the moulding process, the IC chip is coated with silicon nitride in order to protect the IC chip from moisture invaded through cracks or gaps. The coating of silicon nitride is carried out after cleaning the surface of the IC chip by plasma CVD.
摘要:
A solar cell comprises a plurality of series connected photoelectric conversion structures formed on a substrate. The conversion structure consists of a first semiconductor film on a P-type, an intrinsic semiconductor film formed on the first semiconductor film such that one end thereof extends beyond an end of the first semiconductor film and a second semiconductor film of a second, opposite conductivity type formed on the intrinsic semiconductor film such that one end thereof extends beyond the extended end of the intrinsic semiconductor film and makes direct electrical contact with an end of the first semiconductor film of the adjacent structure.
摘要:
A novel primary or secondary battery whose active material for the negative electrode is composed of metallic gallium, gallium alloys or gallium oxide has first come into the world.Gallium has an electrochemical equivalent of 23.24, which is smaller than those of zinc (32.70) and cadmium (56.21). This indicates that when used as an active material for the negative electrode in batteries, gallium has larger capacity per unit mass than zinc and cadmium by respective factors of ca. 1.4 and 2.4. The potential of the reaction; Ga+6OH.sup.- =GaO.sub.3.sup.3- +3H.sub.2 O+3e.sup.- is obviously less noble than the voltage of hydrogen evolution and this means that a high-potential battery can be made. Due to the high hydrogen overvoltage of gallium, gallium ions in the solution can be precipitated as metallic gallium by electrodeposition. As a further advantage, no dendrite formation occurs during the electrodeposition unlike in the case of zinc. The high hydrogen overvoltage also contributes to the production of a battery that undergoes only limited self-discharge. What is more, gallium which has no toxicity presents few environmental problems.
摘要:
An improved method for manufacturing uniform films or etching uniformly on a plurality of substrates is shown. The substrates are vertically placed in a reaction chamber so as to be treated at once. A chemical vapor reaction takes place by virtue of a high frequency electric power which is modulated in its amplitude. By this modulation, the deposition or etching can be carried out over the surface of a susbtrate.