北京京仪世纪自动化设备有限公司——有关电子材料设备介绍

北京京仪世纪自动化设备有限公司(简称京仪世纪)是在原北京仪表机床厂整体改制的基础上,由北京京仪控股有限责任公司、北京模具厂、北京北仪创新真空技术有限公司共同出资于2002年12月成立的有限公司。京仪世纪公司共有五个产品方面:1)

《电子材料制备工艺与设备》课程教学改革:内容更新与教学方法探索

电子材料制备工艺与设备对于现代电子信息技术的发展起着至关重要的作用,其教学内容的优化与教学方法的创新对于提升教学质量和拓宽学生视野具有重要意义。本文深入探讨了“电子材料制备工艺与设备”课程的教学现状,并针对教材选择的合理性、教学内容更新的及时性、以及教学方法改革的创新等方面进行了系统的分析与研究。通过本文的探讨,旨在为电子材料行业相关领域的人才培养提供新的思路与方法,以期培养出更多具备专业素养和创新能力的优秀人才。

微量元素对铝硅合金影响

本文研究了在铝硅(Al13%Si)合金中添加微量元素Ti、Mg、Mn、Cu、Cr、Zn、Ni等,其对合金的组织结构、焊接、着色、成型性能、机械强度以及耐磨性带来的影响。实验结果表明,添加Cu、Cr、Ti、Mg、Zn、Ni元素可以有效提高Al-Si合金的耐腐蚀性能,其中添加Mg的效果尤为显著;而添加Ti、Mn则能够显著提高合金的韧性;添加Ni、Cr则能够显著提高Al-Si合金的硬度。然而,添加Ti、Mg、Mn、Cu、Cr、Zn、Ni等元素会以不同程度降低Al-Si合金的耐磨性能。

Effects of Vapor Pressure and Super-Hydrophobic Nanocomposite Coating on Microelectronics Reliability

Modeling vapor pressure is crucial for studying the moisture reliability of microelectronics, as high vapor pressure can cause device failures in environments with high temperature and humidity. To minimize the impact of vapor pressure, a super-hydrophobic(SH) coating can be applied on the exterior surface of devices in order to prevent moisture penetration. The underlying mechanism of SH coating for enhancing device reliability, however, is still not fully understood. In this paper, we present several existing theories for predicting vapor pressure within microelectronic materials. In addition, we discuss the mechanism and effectiveness of SH coating in preventing water vapor from entering a device, based on experimental results. Two theoretical models, a micro-mechanics-based whole-field vapor pressure model and a convection-diffusion model, are described for predicting vapor pressure. Both methods have been successfully used to explain experimental results on uncoated samples. However, when a device was coated with an SH nanocomposite, weight gain was still observed, likely due to vapor penetration through the SH surface. This phenomenon may cast doubt on the effectiveness of SH coatings in microelectronic devices. Based on current theories and the available experimental results, we conclude that it is necessary to develop a new theory to understand how water vapor penetrates through SH coatings and impacts the materials underneath. Such a theory could greatly improve microelectronics reliability.

西藏自治区邮电器材公司在上海保税区设立贸易行运作

为拓宽业务,适应市场经济发展的需要,该区邮电器材公司全额出资50万元,在上海外高桥保税区—上海中国通信产品交易中心设立的保税贸易行目前正式启动。 上海中国通信产品中心市场是经邮电部批准,由上海东方通信产业贸易有限公司主办的中国第一家全国性通信产业的专业市场,是我国开发规模最大、开放层次最高、功能齐全,被称为“境内关外”的国际自由贸易区—外高桥保税区内,置身于国际和国内两大市场的交汇处,是整个中国通信行业利用外资、吸引当今世界最新通信技术成果,引进国际先进通信设备的窗口。 该贸易中心市场按照通信产业对物资。

Mechanics of flexible and stretchable piezoelectrics for energy harvesting

As rapid development in wearable/implantable electronic devices benefit human life in daily health monitoring and disease treatment medically, all kinds of flexible and/or stretchable electronic devices are booming, together with which is the demanding of energy supply with similar mechanical property. Due to its ability in converting mechanical energy lying in human body into electric energy, energy harvesters based on piezoelectric materials are promising for applications in wearable/implantable device's energy supply in a renewable, clean and life-long way. Here the mechanics of traditional piezoelectrics in energy harvesting is reviewed, including why piezoelectricity is the choice for minor energy harvesting to power the implantable/wearable electronics and how. Different kinds of up to date flexible piezoelectric devices for energy harvesting are introduced, such as nanogenerators based on Zn O and thin and conformal energy harvester based on PZT. A detailed theoretical model of the flexible thin film energy harvester based on PZT nanoribbons is summarized, together with the in vivo demonstration of energy harvesting by integrating it with swine heart. Then the initial researches on stretchable energy harvesters based on piezoelectric material in wavy or serpentine configuration are introduced as well.

Advances in flexible lithium metal batteries

Flexible energy storage devices are becoming indispensable new elements of wearable electronics to improve our living qualities.As the main energy storage devices,lithium-ion batteries(LIBs)are gradually approaching their theoretical limit in terms of energy density.In recent years,lithium metal batteries(LMBs)with metallic Li as the anode are revived due to the extremely high energy density,and are considered to be one of the ideal alternatives for the next generation of flexible power supply.In this review,key technologies and scientific problems to be overcome for flexible LMBs are discussed.Then,the recent advances in flexible LMBs,including the design of flexible Li metal anodes,electrolytes,cathodes and interlayers,are summarized.In addition,we have summed up the research progress of flexible device configurations,and emphasized the importance of flexibility evaluation and functionality integration to ensure the wearing safety in complex environment.Finally,the challenges and future development of flexible LMBs are summarized and prospected.

Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range

Recently,the newly booming metal halide perovskites have attracted extensive attention worldwide due to their outstanding optoelectronic performance,and are expected to be ideal candidates for photodetectors(PDs).However,there is still lack of perovskite PDs-based imaging devices coming into commercialization stage,due to some practical reasons including toxicity brought by lead-based perovskites and the large light current fluctuations.In this paper,for the first time we fabricate a lead-free Cs3Bi2Br9 perovskite PD,and build a prototype of this perovskite PD-based imaging system with diffuse reflection imaging mode.Moreover,we propose a new parameter F related to light current fluctuation to evaluate imaging performance of a PD especially for weak diffuse light condition,and prove its usability by comparison of unoptimized lead-free Cs3Bi2Br9 perovskite PD and atomic layer deposition(ALD)optimized Cs3Bi2 Br9 PD.ALD-optimization can improve the quality of perovskite film and suppress the dark current and current fluctuation.Finally,we obtain satisfactory diffuse reflection images of 2D and 3D objects with wide dynamic range.Therefore,the ALD-optimized Cs3Bi2Br9PD has addressed two major concerns about perovskite PDs-based imaging devices,that may extend application of perovskite materials and improve imaging quality.