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富春江南岸1800℃的“炼丹炉” 炼出了全球最大的氧化镓单晶_我的网站

一 |     Commerce Secretary Gina Raimondo said this weekend that U.S. business leaders are "very worried" about a partial federal government shutdown if Congress cannot pass a short-term funding measure ahead of an Oct. 1 deadline."They are, I think, in some cases, frustrated that this is how government operates," Raimondo said in an interview that aired Sunday on "Face the Nation."  The White House has asked Congress to pass a short-term spending bill to avoid a partial shutdown on Oct. 1. Raimondo said she hopes there will be a "speedy resolution" to the situation. 

     "It's a challenge for the economy and (has) the potential to set us back," she continued. 

• Transcript: Commerce Secretary Gina Raimondo on "Face the Nation," September 3, 2023

Earlier this summer, Republican Rep. Garret Graves of Louisiana told "Face the Nation" that he couldn't rule out a potential government shutdown after struggles to make a deal to raise the nation's debt ceiling stretched on, bringing the country dangerously close to a default.                 Fitch Ratings cited the standoff as one of the reasons why the ratings agency recently downgraded U.S. credit from its highest rating. The agency said that the government's "repeated debt-limit political standoffs and last-minute resolutions have eroded confidence in fiscal management."The August jobs report, released Friday morning, showed 187,000 jobs added last month to the workforce. However, it also showed that underemployment – the number of people working more than one job, or jobs they are overqualified for – has gone up."The reality is that inflation still exists," Raimondo said. "I don't want to minimize what Americans are feeling, and that's why we get up and go to work every day, but this economy by any measure is doing incredibly well, and much better than anyone could have predicted, I think, three years ago when we started."

On China

Raimondo also spoke on her recent visit to China, saying that "a great deal of progress" was made. Raimondo is the first U.S. commerce secretary in five years to be on the ground in China.                       "In terms of concrete deliverables, I was able to open three specific lines of communication with the Chinese," Raimondo said. These included sharing information about export controls, opening a dialogue on commercial issues, and discussing how trade secrets are handled.American business leaders have expressed concern about the handling of trade secrets, Raimondo said. Another is the lack of transparency in Chinese business regulations. American companies in China have had their offices raided and employees detained, without Chinese authorities presenting hard evidence of wrongdoing. "When I expressed these concerns, I was heard," Raimondo said, before emphasizing that she  "wasn't given any promises" by Chinese leaders. When asked if she trusted the Chinese government after her visit, Raimondo said that "trust is probably not the word" she would use. "Actions speak louder than words," Raimondo said. "So time will tell whether they are going to really be as they say they want to be, you know, more market oriented and open and reform minded when it comes to their economy, their regulatory regime."Raimondo was the fourth high-level official from the Biden administration to visit Beijing this summer, following Secretary of State Antony Blinken, Treasury Secretary Janet Yellen, and the Presidential Envoy for Climate, John Kerry. "But one thing that I think we can take a bit of heart in is it's in China's interest," Raimondo continued. "It's in their economic interest to have foreign direct investment and to make sure, you know, they had a very good economy when they were market oriented and reform minded. And so we have to hope that self interest will affect their future decisions."                      — Richard Escobedo contributed to this report.                                  。    新能源汽车、储能电站，都离不开它富阳正在打造“浙江光谷·富春芯城” 　　制图 高薇　富春江畔的富阳8月6日起，都市快报推出《13天，点亮一座未来之城》系列报道，全景呈现杭州各区、县（市）特色发展路径，用13块“拼图”拼成一幅更高水平创新活力之城的新图景。第四天，点亮富阳区。富春江南岸，杭州富加镓业科技有限公司（以下简称“富加镓业”）的研发中心里，静得出奇，只有设备运转时发出的轻响。台子上摆着一排外形像“炼丹炉”的设备，里面“炼”着一种叫氧化镓的白色粉末。炉膛里的温度，高达1800℃。8个小时后，炉盖缓缓抬升，一个通体黝黑、形态匀整的圆锥状晶体出现在眼前，底部直径精准地卡在305毫米，也就是12英寸。

二 | 今年3月，富加镓业首次研制出12英寸氧化镓单晶，刷新世界纪录，成为全球首家掌握这一技术的企业。“目前，国际上氧化镓衬底的最大尺寸是8英寸，冲12英寸，并不是简单的尺寸放大，而是生长技术的代际飞跃。

三 | ”富加镓业副总经理黄浩天说。

四 | 近日，富加镓业率先开展12英寸氧化镓MOCVD外延技术研发，成功将8英寸氧化镓MOCVD外延工艺首次外推至12英寸。这意味着，氧化镓芯片的“地基”做得更大了，未来能造出性能更强、成本更低的电力电子器件。为什么要造12英寸的？氧化镓是一种半导体材料，你可能没听说过它，但用它做出来的功率器件，能扛住更高的电压、承受更高的温度、损耗还更小，新能源汽车、储能电站、智能电网、数据中心，都离不开它。和目前最常用的半导体材料“硅”比起来，氧化镓就像个“特种兵”，更耐高温、更耐高压、性能更强。这个“特种兵”，特别难“伺候”。“氧化镓是单斜晶体结构，各向异性极强，生长过程中哪怕微小的参数扰动，都可能产生杂晶、引发开裂；尺寸越大，控制难度呈指数级上升。”黄浩天说。2019年，富加镓业落户富阳，团队只掌握2英寸小尺寸晶体的生长技术，距离最低6英寸衬底产业化的门槛，还有巨大的差距。“当时，氧化镓产业链在国内近乎空白，更少有企业布局外延、器件配套，美、日企业长期垄断高端衬底材料，对我国实施出口管制。

五 | ”黄浩天说。怎么啃下这块硬骨头？团队在设计阶段就引入数值模拟技术，精准匹配氧化镓晶体的生长规律；同时，研发自主可控的生长装备，对炉内温场、气流、晶体运动状态实现了微米级的精度调控。无数次工艺调试之后，大尺寸单晶生长的技术瓶颈终于被突破。为什么12英寸这么重要？目前，主流的硅基生产线用的就是12英寸规格。氧化镓晶体长到12英寸，就可以直接“借用”现有的成熟产线，未来规模化量产之后，下游功率器件的制造成本会大幅降低。眼下，富加镓业国内首条6英寸氧化镓单晶及外延片生长线已具备量产能力，计划年底建成年产1万片6英寸的生产线。同时，富加镓业也在稳步推进8英寸量产、12英寸技术落地。从2英寸到12英寸，富加镓业用了不到7年时间。

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Published on:05:30:52