Characteristics and analysis of 4H-SiC PiN diodes with a carbon-implanted drift layer

The characteristics of 4H-SiC PiN diodes with a carbon-implanted drift layer was investigated and the reason of characteristics improvement was analyzed. The forward voltage drops of the diodes with carbonimplanted drift layer were around 3.3 V, which is lower than that of devices without carbon implantation, the specific-on resistance was decreased from 9.35 to 4.38 mΩcm^2 at 100 A/cm^2, and the reverse leakage current was also decreased. The influence of carbon incorporation in the Si C crystalline grids was studied by using deep-level transient spectroscopy（DLTS）. The DLTS spectra revealed that the Z_（1/2） traps, which were regarded as the main lifetime limiting defects, were dramatically reduced. It is proposed that the reduction of Z_（1/2） traps can achieve longer carrier lifetime in the drift layer, which is beneficial to the performance of bipolar devices.

园林工程中的绿化种植施工关键技术探究

园林建设是实现绿色城市必不可少的过程,园林绿化不仅可以美化城市环境,还能够改善市区的空气质量。随着人们对城市绿化的要求渐趋提升,绿化人员的绿化施工水平显得尤为重要,只有保证绿化施工人员的施工质量,才能巩固城市绿化成果,推动绿色城市的高质量发展。因此,本文对绿化种植中的关键技术进行梳理,为提升绿化施工人员专业水平的提升提供帮助。

浅谈园林施工管理与技术难点的几个问题

我国的经济不断发展,经济实力一越跻身成为世界前列。随着人们的生活质量的不断改善和生活水平的提高,人们对于园林绿化的需求和要求也在不断提高,园林环境的良好发展,不仅能满足人们的审美,也能提升城市的魅力。但是对于目前园林施工管理与技术,依然存在许多技术性的问题和难点,阻碍了园林施工和建设事业发展。本文将对园林施工管理和技术难点几个方面进行探讨,旨在可以通过一系列科学的措施来促进园林行业的进一步完善和提高。