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肖特基勢(shì)壘二極管的結(jié)構(gòu)

  肖特基勢(shì)壘二極管是一種低功耗、超高速半導(dǎo)體器件,廣泛應(yīng)用于開(kāi)關(guān)電源、變頻器、驅(qū)動(dòng)器等電路,作高頻、低壓、大電流整流二極管、續(xù)流二極管、保護(hù)二極管使用。今天國(guó)創(chuàng)將為您講解肖特基二極管的結(jié)構(gòu)。


肖特基二極管


  肖特基二極管在結(jié)構(gòu)原理上與PN結(jié)二極管有很大區(qū)別,它的內(nèi)部是由陽(yáng)極金屬(用鉬或鋁等材料制成的阻擋層)、二氧化硅(SiO2)電場(chǎng)消除材料、N-外延層(砷材料)、N型硅基片、N+陰極層及陰極金屬等構(gòu)成。在N型基片和陽(yáng)極金屬之間形成肖特基勢(shì)壘。當(dāng)在肖特基勢(shì)壘兩端加上正向偏壓(陽(yáng)極金屬接電源正極,N型基片接電源負(fù)極)時(shí),肖特基勢(shì)壘層變窄,其內(nèi)阻變小;反之,若在肖特基勢(shì)壘兩端加上反向偏壓時(shí),肖特基勢(shì)壘層則變寬,其內(nèi)阻變大。

  肖特基二極管分為有引線和表面安裝(貼片式)兩種封裝形式。采用有引線式封裝的肖特基二極管通常作為高頻大電流整流二極管、續(xù)流二極管或保護(hù)二極管使用。它有單管式和對(duì)管(雙二極管)式兩種封裝形式。

  肖特基對(duì)管又有共陰(兩管的負(fù)極相連)、共陽(yáng)(兩管的正極相連)和串聯(lián)(一只二極管的正極接另一只二極管的負(fù)極)三種管腳引出方式。

  采用表面封裝的肖特基二極管有單管型、雙管型和三管型等多種封裝形式。

  上述所講解的就是肖特基勢(shì)壘二極管結(jié)構(gòu),希望看完能夠?qū)α私庑ぬ鼗鶆?shì)壘二極管有所幫助,如果您想要了解更多關(guān)于肖特基勢(shì)壘二極管的相關(guān)信息的話,歡迎在線咨詢(xún)我們國(guó)創(chuàng)客服或是撥打服務(wù)熱線029-85251919進(jìn)行咨詢(xún),我們將竭誠(chéng)為您提供優(yōu)質(zhì)的服務(wù)!
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