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    • 49. 发明申请
    • Zener Diode Within a Diode Structure Providing Shunt Protection
    • 二极管内的齐纳二极管提供并联保护
    • US20120167969A1
    • 2012-07-05
    • US13020849
    • 2011-02-04
    • Christopher J. Petti
    • Christopher J. Petti
    • H01L31/02
    • H01L27/1421H01L31/0747H01L31/1892Y02E10/50
    • A structure to provide a Zener diode to avoid shunt formation is disclosed. An undoped or lightly doped monocrystalline thin semiconductor lamina is cleaved from a donor body which is not permanently affixed to a support element. The lamina may be annealed at high temperature to remove damage from a prior implant. At least one aperture is formed through the lamina, either due to flaws in the cleaving process, or intentionally following cleaving. Heavily doped amorphous silicon layers having opposite conductivity types are deposited on opposite faces of the lamina, one forming the emitter and one a base contact to a photovoltaic cell, while the lamina forms the base of the cell. The heavily doped layers contact in the aperture, forming a Zener diode. This Zener diode prevents formation of shunts, and may behave as a bypass diode if the cell is placed under heavy reverse bias, as when one cell in a series string is shaded while the rest of the string is exposed to sun.
    • 公开了提供齐纳二极管以避免分流形成的结构。 未掺杂或轻掺杂的单晶薄半导体层从不永久地固定到支撑元件的施主体断开。 层可以在高温下退火以去除以前的植入物的损伤。 由于切割过程中的缺陷,或者故意在切割之后,至少一个孔通过层形成。 具有相反导电类型的重掺杂非晶硅层沉积在层的相对表面上,一个形成发射极,另一个与光伏电池的基极接触,而薄层形成电池的基极。 重掺杂层在孔中接触,形成齐纳二极管。 该齐纳二极管防止分流器的形成,并且如果电池放置在较强的反向偏压下,则可能表现为旁路二极管,如串联串中的一个电池阴影而串的其余部分暴露在阳光下时。