离子束诱导转型成结技术是一种可以获得高质量p-n结的新型成结方法,它克服了传统碲镉汞(MCT)离子注入成结工艺中钝化层有损伤的弊病,且工艺相对简单,有希望成为碲镉汞红外焦平面器件的新一代成结技术。本文介绍了以环孔工艺和氢化技术...离子束诱导转型成结技术是一种可以获得高质量p-n结的新型成结方法,它克服了传统碲镉汞(MCT)离子注入成结工艺中钝化层有损伤的弊病,且工艺相对简单,有希望成为碲镉汞红外焦平面器件的新一代成结技术。本文介绍了以环孔工艺和氢化技术为代表的常规离子束刻蚀(Ion Beam Milling)及以H_2/CH_4为代表的反应离子束刻蚀(Reactive Ion Etching)两大类离子束诱导转型(Plasma induced type conversion)成结技术的基本原理、特点及其工艺过程。并以反应离子束刻蚀(RIE)为例,列举了现有报道的典型器件性能。同时还把离子束诱导与离子注入工艺在各方面作了比较。展开更多
Ever since the low energy N + ion beam has been accepted, the mutations of ionizing radiation are attributable mainly to avoidance of DNA damages repair. Evidences based on in vivo proof results are limited. Using the...Ever since the low energy N + ion beam has been accepted, the mutations of ionizing radiation are attributable mainly to avoidance of DNA damages repair. Evidences based on in vivo proof results are limited. Using the E.coli wild type and mutator strains, the mutant frequencies suggest that base substitutions in rpoB gene are induced by the N + implantation. A highly conserved region is selected to get the direct evidence for base substitutions by sequence of the high fidelity PCR amplification products in mutants. Most of the mutants (90.9%, 40/44) have at least one base substitution in the amplification region. The evidences for CG to TA (55%, 22/40), AT to GC (20%, 8/40) and TA to CG (5%, 2/40) transitions are identified. The transversions are AT to TA (15%, 6/40) and GC to CG (5%, 2/40). It is suggested that DNA cytosine methylase might play an important role in mismatch repair of DNA damage induced by N + implantation by analysis of the mutant frequencies of mutator strains.展开更多
文摘离子束诱导转型成结技术是一种可以获得高质量p-n结的新型成结方法,它克服了传统碲镉汞(MCT)离子注入成结工艺中钝化层有损伤的弊病,且工艺相对简单,有希望成为碲镉汞红外焦平面器件的新一代成结技术。本文介绍了以环孔工艺和氢化技术为代表的常规离子束刻蚀(Ion Beam Milling)及以H_2/CH_4为代表的反应离子束刻蚀(Reactive Ion Etching)两大类离子束诱导转型(Plasma induced type conversion)成结技术的基本原理、特点及其工艺过程。并以反应离子束刻蚀(RIE)为例,列举了现有报道的典型器件性能。同时还把离子束诱导与离子注入工艺在各方面作了比较。
文摘Ever since the low energy N + ion beam has been accepted, the mutations of ionizing radiation are attributable mainly to avoidance of DNA damages repair. Evidences based on in vivo proof results are limited. Using the E.coli wild type and mutator strains, the mutant frequencies suggest that base substitutions in rpoB gene are induced by the N + implantation. A highly conserved region is selected to get the direct evidence for base substitutions by sequence of the high fidelity PCR amplification products in mutants. Most of the mutants (90.9%, 40/44) have at least one base substitution in the amplification region. The evidences for CG to TA (55%, 22/40), AT to GC (20%, 8/40) and TA to CG (5%, 2/40) transitions are identified. The transversions are AT to TA (15%, 6/40) and GC to CG (5%, 2/40). It is suggested that DNA cytosine methylase might play an important role in mismatch repair of DNA damage induced by N + implantation by analysis of the mutant frequencies of mutator strains.
