【正文】
專業(yè)資料整理分享 軟恢復(fù)二極管新進(jìn)展——擴(kuò)散型 雙基區(qū)二極管 張海濤 張 斌 (清華大學(xué)電力電子廠) (北京1021信箱402室, 北京 102201) 摘 要:本文介紹了一種采用擴(kuò)散型雙基區(qū)結(jié)構(gòu)的快速軟恢復(fù)二極管。二極管基區(qū)由傳統(tǒng)的輕摻雜襯底基區(qū)N 與擴(kuò)散形成的較重?fù)诫s的N區(qū)(緩沖基區(qū))兩部分組成。實(shí)驗(yàn)結(jié)果表明,較傳統(tǒng)的PIN二極管有了較大改善。 關(guān)鍵詞:二極管 快速 軟恢復(fù) New Development of Soft Recovery Diode: Diode with Double Base Regions by the Diffusion Zhang Haitao, Zhang Bin (Power Electronics Factory of Tsinghua University) ( P. O. Box. 1021, Beijing, China, Post Code: 102201) Abstract: This paper introduces a fast and soft recovery diode with double base regions by diffusion. The base design of the diode consists of two regions: conventional lightly doped substrate N- and a more heavily doped region N (buffering region) by the diffusion. The results of test indicate that the reverse recovery softness of the diodes is increased to about , and is more improved than the conventional PIN diode. Key words: diode, fast, soft recovery 1 引 言 廣泛應(yīng)用于功率電路中的PIN二極管具有較高的反向耐壓,而且在通過(guò)正向大電流密度的情況下,由于基區(qū)電導(dǎo)調(diào)制效應(yīng),正向壓降較小。為了提高耐壓,傳統(tǒng)PIN二極管采用深擴(kuò)散緩變結(jié)構(gòu),造成關(guān)斷前存在著大量存貯電荷使得反向恢復(fù)時(shí)間延長(zhǎng);為了減小壓降,這種高壓二極管通常又需要設(shè)計(jì)成基區(qū)穿通