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新型碳化硅 SiC 晶体管问世，可在 600℃ 高温下工作_我的网站

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A | 8 月 25 日消息，科技媒体 Tom's Hardware 昨日（8 月 24 日）发布博文，报道称京都大学研究团队研发出新型碳化硅（SiC）晶体管，采用标准离子注入工艺制造，可在 600℃（873 K）下工作。援引博文介绍，该晶体管采用商业芯片工厂普遍使用的“离子注入”（ion implantation）工艺打造，相关成果于 8 月 17 日发表在《APL Electronic Devices》。 KINSHASA, Congo -- A boat capsized in Congo’s northwest killing at least 27 people, and more than 70 others were missing, a senior government official said Saturday as rescuers searched frantically for survivors.The locally made boat capsized late Friday in the city of Mbandaka in Equateur Province as it transported more than 100 passengers along the Congo River to the town of Bolomba, according to Taylor Nganzi, deputy provincial governor.“Already 27 bodies of victims have been removed from the waters (and) transported to the morgue of the general hospital in Mbandaka,” said Nganzi, adding that an investigation to find out the cause of the accident had begun.The New Civil Society of Congo, a local civil society group, said 49 people died in the accident, which it said occurred after an engine failure. “Everything started to sink,” Jean-Pierre Wangela, president of the group, told reporters.The contradictory death tolls, which is common in such incidents in Congo, could not immediately be reconciled.Volunteers joined rescuers in the search for survivors and for bodies, while families mourned loved ones who were among the victims.“We are supervising the search for bodies with the river services and accompanied by the victims’ families,” said Nganzi.Boat accidents are common on the Congo River and on the nation’s lakes because of the prevalent use of makeshift boats that are often overloaded. The majority of the population in the country's northwest use the rivers to travel because of a lack of good roads and because it is a less expensive.The Congolese government had banned night travel throughout the country to avoid accidents, although many defy the directive.。研究团队选择“结型场效应晶体管”（JFET）结构，并将栅极置于沟道下方，形成底栅（bottom-gate）布局。

B | 离子注入过程中，部分掺杂原子会沿晶体通道深入目标区域之外，形成“沟道效应”尾部。传统顶栅结构难以补偿这一影响，导致设计阈值电压与实测值相差超过 2 V。底栅结构可捕获偏离预定深度的掺杂原子，让该偏差在 400℃ 下缩小至 0.1 V 以内。该科研团队为了减少高温漏电，团队还加入“双阱”（double-well）隔离结构。