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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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    Latest newsA court in Wuhan, Central China's Hubei Province, has sentenced a man surnamed Xia and his son to six years and five and a half years in prison, respectively, for selling controlled stimulant substances. The verdict followed a two-year police investigation, which was initiated after China's Ministry of Public Security received a tip-off from the US Drug Enforcement Administration (DEA), Chinese Central Television (CCTV) reported on Tuesday.
The case dates back to June 2023, when the US DEA, operating under the Department of Justice, notified China's MPS of an arrest involving a Chinese national charged with trafficking sensitive chemicals. The MPS subsequently directed public security authorities in Hubei to launch an investigation.
Further investigations found Xia and his son had sold and shipped large quantities of non-scheduled precursor chemicals overseas.
Beginning in May 2021, the two suspects registered several shell trading companies and hired employees to fabricate information about the companies' production, business and transportation capabilities on domestic and overseas websites. 
They posted large numbers of advertisements for non-scheduled chemicals, sourced the products domestically after receiving orders from overseas buyers, and shipped them abroad through international freight forwarding companies, according to the CCTV report.
During a two-year investigation, police found that some of the chemicals sold by the duo included stimulant substances controlled under Chinese regulations.
The court found that Xia and his son organized others to illegally sell controlled stimulant substances in 123 transactions between November 2021 and July 2024, with total sales exceeding 1.69 million yuan ($235,000).
On August 14, 2026, the court convicted both defendants of illegal business operations, sentencing Xia to six years in prison and his son to five years and six months. Both were also fined.
Police reminded companies and individuals engaged in chemical trading and export businesses to strengthen their legal awareness, strictly comply with relevant Chinese and foreign laws and regulations, and follow warning notices issued by China's national anti-drug authorities in August 2019, November 2023, November 2025 and May 2026 to guard against legal risks.
Global Times
。     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》。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。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。该结构通过 pn 结隔离单个器件，避免依赖下方半绝缘碳化硅衬底。参考广告声明：文内含有的对外跳转链接（包括不限于超链接、二维码、口令等形式），用于传递更多信息，节省甄选时间，结果仅供参考，包含外链的文章均包含本声明。

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