文献与摘要（73）

倒装芯片安装中课题Challenges in Flip Chip Assembly倒装芯片封装技术向更薄更小更高一体化的发展方向,一些旧的方式是不符合要求的。本文介绍Amkor、STATS、TDK等一些公司新的封装技术与对载板要求。     

新产品与新技术（73）

高散热金属基印制板剑桥Nanotherm公司发布TnanothermTM金属基印制电路板（MBPCB）,这是用陶瓷介电技术花费二年时间研发成功。此技术核心是在铝基板上覆盖氧化铝（A12O3）为绝缘介质,相当于纳米陶瓷介质。     

A Dual-Diode 73-GHz Gunn Oscillator

It is shown that two resonant cap structures can be mounted in a common waveguide to combine power from two Gunn diodes. Approximately 80-mW power was obtained at 73 GHz.     

EMC单片机EM73P461A在工业中的应用

EMC单片机EM73P461A是一款台湾产的基于PIC内核的4位单片机，文中介绍了它的一些功能及在工业中的应用，通过实际应用介绍了它的优缺点及在应用设计当中应该注意的问题。     

73M2901芯片在嵌入式Modem中的应用

73M 2 90 1是TDK公司生产的一种单芯片ModemIC ,它集成度高 ,稳定性好 ,支持V .2 2bis、V .2 2、V .2 3等多种协议标准。文章介绍了一种采用 73M 2 90 1芯片的嵌入式Modem的研制方法 ,该Modem体积小、灵活性高的嵌入式设计 ,较高的可靠性和多种可选速率 ,使安装维护更加方便 ,非常适合于通信终端的嵌入式应用 ,并且在远程抄表等方面的应用中取得了良好的效果     

73-GHz self-aligned SiGe-base bipolar transistors withphosphorus-doped polysilicon emitters

The authors report a thermal-cycle emitter process using phosphorus for the fabrication of self-aligned SiGe-base heterojunction bipolar transistors. The low thermal cycle results in extremely, narrow basewidths and preservation of lightly doped spacers in both the emitter-base and base-collector junctions for improved breakdown. Transistors with 35-nm basewidths were obtained with low emitter-base reverse leakage and a peak cutoff frequency of 73 GHz for an intrinsic base sheet resistance of 16 kΩ/□. Minimum NTL (nonthreshold logic) and ECL (emitter-coupled logic) gate delays of 28 and 34 ps, respectively were obtained with these devices     

MR susceptibility misregistration correction

The authors present a new in vivo method to correct the nonlinear, object-shape-dependent and material-dependent spatial distortion in magnetic resonance (MR) images caused by magnetic susceptibility variations. This distortion across the air/tissue interface before and after the correction is quantified using a phantom. The results are compared to the distortion-free computed tomography (CT) images of the same phantom by fusing CT and MR images using fiducials, with a registration accuracy of better than a millimeter. The distortion at the bone/tissue boundary is negligible compared to the typical MRI (MR imaging) resolution of 1 mm, while that at the air/tissue boundary creates displacements of about 2 mm (for G(x) 3.13 mT/m). This is a significant value if MRI is to provide highly accurate geometric measurements, as in the case of target localization for stereotaxic surgery. The correction scheme provides MR images with accuracy similar to that of CT: 1 mm. A new method to estimate the magnetic susceptibility of materials from MR images is presented. The magnetic susceptibility of cortical bone is measured using a SQUID magnetometer, and is found to be -8.86 ppm (with respect to air), which is quite similar to that of tissue (-9 ppm).     

Molecular MR Imaging Probes

Magnetic resonance imaging (MRI) has been successfully applied to many of the applications of molecular imaging. This review discusses by example some of the advances in areas such as multimodality MR-optical agents, receptor imaging, apoptosis imaging, angiogenesis imaging, noninvasive cell tracking, and imaging of MR marker genes.     

73GHz磷掺杂多晶硅发射极自对准SiGe基区双极晶体管

报道了一种用来制作自对准SiGe基区异质结双极晶体管降低热处理周期的磷发射极工艺。短的热处理周期导致极窄的基区宽度,并维持轻掺杂的隔离层不消失,这种隔离层是为了提高击穿特性而制作在发射极-基极和基极-集电极内的。已获得了35nm基区宽度的晶体管,其发射极-基极反向漏电小,峰值截止频率为73GHz,本征基区薄层电阻为16kΩ/□。用这些器件获得的最小NTL和ECL门延时分别为28和34ps。     

73M233调制解调器在短波通信中的应用

介绍了无线调制解调器73M233的原理、特点和性能,结合短波信道的数据传输对73M223的具体应用电路进行了设计和实现,提供了利用现有短波电台实现数据传输的解决方案。     

应用在远程控制系统中的72M2901

本文介绍了单片全双工调制解调器芯片73M2901的基本功能和特点,阐述了73M2901在电话网络远程控制系统中的应用.利用该方案,可在电话网络上进行远程数据传输,实现计算机对现场的远程监控.     

用MR9830构成的电子变压器

MR9830是三菱公司推出的一体化功率模块,通常用于日光灯及节能灯的 电子镇流器,它所需外围元件极少。文中介绍了MR9830的性能和常规应用,并重点介绍了它在电子变压器上的应用电路。