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2009 4th International Microsystems, Packaging, Assembly and Circuits Technology Conference最新文献

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Image transfer solutions for future demand 满足未来需求的图像传输解决方案
Toru Takahashi
Ever increasing need for smaller and functionally more integrated electronics devices such as smart phone, IC package substrate is forcing changes in materials for PWB imaging. This paper will provide insights how new materials developments are offering improved capabilities to produce such a high-end, fine-line PWBs along with imaging process considerations. The fabrication processes involved in the production of fine-line printed wiring boards will be also reviewed in some detail, between subtractive processes (which will not meet future needs) and semi-additive processes as well as emerging damascene-type of structure. This paper will highlight an overview of the importance that material and process selection has on the capability of PWB fabricators to meet the challenges in the future and provide insights into future direction based on evolving market needs
对更小、功能更集成的电子设备(如智能手机)的需求不断增加,IC封装衬底正在迫使用于PWB成像的材料发生变化。本文将提供新材料的发展如何提供改进的能力,以生产这样的高端,细线印刷电路板以及成像工艺的考虑。细线印刷线路板的制造工艺也将在减法工艺(不能满足未来的需要)和半增材工艺以及新兴的大马士革型结构之间进行一些详细的审查。本文将重点介绍材料和工艺选择对印制电路板制造商应对未来挑战的能力的重要性,并根据不断变化的市场需求提供对未来方向的见解
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引用次数: 0
Thermal management of liquid-cooled cold plates for multiple heat sources in a humanoid robot 人形机器人多热源液冷冷板的热管理
S. Kim, Kyudae Hwang, Jong-Chul Moon, S. Karng
Thermal management for two array types of a serial circulation and a two-way parallel circulation using six mini liquid-cooled cold plates were experimentally measured in this study. In order to reduce weight of the cooling devices for humanoid robot cooling, the cold plates were covered with non-metallic material (polycarbonate, PC). Six cold plates attached on 10 x 10 mm2 copper base: 0.5 x 0.5 mm2 pin-finned surfaces of 1.5 mm high with 0.5 mm array spacing, was mounted on six copper heating blocks with isothermal conditions of 50~90°C, respectively. In order to compare thermal characteristics according to two circulation types, the surface temperatures of heating blocks and the cooling water temperatures at inlets and outlets of cold plates were measured. From the results, it was found that a two-way parallel circulation was better performance than a serial circulation in terms of total thermal resistance, total heat transfer rate, and surface temperature rises from first heating block to last one for six multiple cold plates.
采用6个小型液冷冷板对串联循环和双向平行循环两种阵列的热管理进行了实验研究。为了减轻人形机器人冷却装置的重量,冷板采用非金属材料(聚碳酸酯、PC)覆盖。6个冷板分别安装在10 × 10 mm2铜底座上:0.5 × 0.5 mm2针翅面,高1.5 mm,阵列间距0.5 mm,分别安装在等温条件为50~90°C的6个铜加热块上。为了比较两种循环方式的热特性,测量了加热块表面温度和冷板进出口冷却水温度。结果表明,对于6块多冷板,双向平行循环在总热阻、总换热率以及从第一个加热块到最后一个加热块的表面温升方面优于串联循环。
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引用次数: 7
A study to stencil printing technology for solder bump assembly 凸焊组件的模板印刷技术研究
Mu-Chun Wang, Z. Hsieh, Kuo-Shu Huang, C. Tu, Shuang-Yuan Chen, Heng-Sheng Huang
In general, the stencil printing manufacturing in pre-WLCSP (wafer-level chip-scale packaging) is able to be integrated by 7-step processes, including two masks and one set of stencil plate. After the formation of solder ball, the specified professional probe card is needed to verify whether the electric functions of this packaged IC are good. After this step, the wafer grinding, the wafer cutting, the chip choice and the final test (F/T) are gradually adopted to proceed. Finally, due to the customer's need, the shipping package type to customers is, generally, tray or tape and reel. Although the stencil printing technology can provide the mass-production capability, the mainly existing problems of this technology are the quality of manufacturing steel plate, the coating operation for solder paste, and the flatness of wafer surface. These issues usually constrain the minimization of the size of the solder ball and the pitch. Thinking to solve these issues, this package technology is still feasible in assembly competition.
一般来说,pre-WLCSP(晶圆级芯片级封装)中的模板印刷制造可以通过7步工艺集成,包括两个掩模和一套模板。焊锡球形成后,需要指定的专业探针卡来验证这种封装IC的电气功能是否良好。在这一步之后,晶圆研磨、晶圆切割、芯片选择和最终测试(F/T)逐步采用。最后,由于客户的需要,运输包装类型给客户,一般是托盘或磁带和卷轴。虽然网版印刷技术可以提供量产能力,但该技术存在的主要问题是制造钢板的质量、锡膏的涂覆操作、晶圆片表面的平整度。这些问题通常限制了焊球尺寸和间距的最小化。考虑到这些问题的解决,这种封装技术在组装竞争中仍然是可行的。
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引用次数: 1
Guarding trace and ground via-hole analysis for DDR interface designed in high-speed packages 高速封装中DDR接口的保护走线和接地过孔分析
R. Sung, K. Chiang, J. Lai, Yu-Po Wang
Because of the miniaturization on the demand, the area for the layout design is decreasing. But, more and more functions are integrated. In this situation, high-speed design, for example, the DDR access interface is easy to cause Simultaneous Switching Noises (SSN). In this paper, some analysis on this design was evaluated.
由于需求的小型化,布局设计的面积越来越小。但是,越来越多的函数被集成。在这种情况下,高速设计(如DDR接入接口)容易产生SSN (Simultaneous Switching noise)。本文对该设计进行了分析评价。
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引用次数: 0
Design optimization and analysis of a novel nanocomposite-film typed flip chip technology 一种新型纳米复合薄膜型倒装芯片技术的设计优化与分析
Hsien-Chie Cheng, Kun-Yu Hsieh
This paper aims at developing an effective scheme for design optimization of a novel nanocomposite-typed flip chip (FC) technology, constructed by integrating an Ag-nanowire/polymer nanocomposite film together with a nonconductive paste (NCP) technology. The objective of the optimization problem is to achieve the optimal process-induced thermal-mechanical behaviors of the novel FC technology during the NCP bonding process through the selection of material properties, process parameters and geometry data. The process-induced thermal-mechanical behaviors are evaluated using a process-dependent simulation methodology that integrates both transient thermal and nonlinear contact FE analyses and a “death-birth” meshing scheme. The validity of the process-dependent FE simulation methodology is also confirmed through experiment. To demonstrate the effectiveness of the present design optimization approach, several design problems associated with the FC technology are performed.
本文旨在开发一种新型纳米复合倒装芯片(FC)技术的有效设计优化方案,该技术将银纳米线/聚合物纳米复合膜与不导电浆料(NCP)技术集成在一起。优化问题的目标是通过材料性能、工艺参数和几何数据的选择,实现新型FC技术在NCP键合过程中最优的工艺诱导热-力学行为。过程引起的热力学行为使用过程相关的模拟方法进行评估,该方法集成了瞬态热和非线性接触有限元分析以及“死亡-出生”网格方案。通过实验验证了过程相关有限元仿真方法的有效性。为了证明当前设计优化方法的有效性,执行了与FC技术相关的几个设计问题。
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引用次数: 0
Interfacial toughness evaluation of SAC305 solder bump with pendulum impact test 用摆锤冲击试验评价SAC305凸点的界面韧性
F. Tai, J. Duh
The high impact speeds (200, 1000 mm/s) in the pendulum test were conducted on the SAC305/ENIG joints aged at 150°C for 500 and 1000 h, respectively. The preliminary results exhibit that the peak force, pre-peak energy and total impact energy except post-energy of as-reflowed are larger than those of as-aged samples regardless of aging time. For the as-reflowed SAC305/ENIG joint (0.3 mm at diameter), the peak force is 2.592 N at the speed of the 1000 mm/s; the
在摆锤试验中,SAC305/ENIG接头分别在150℃时效500h和1000h下进行了高冲击速度(200mm /s、1000mm /s)试验。初步结果表明:无论时效时间如何,再流试样的峰值力、峰前能和除后能外的总冲击能均大于时效试样;对于再流态SAC305/ENIG接头(直径0.3 mm),在速度为1000 mm/s时,最大作用力为2.592 N;的
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引用次数: 0
Stress evaluations in micro bump structures of FCBGA FCBGA微凹凸结构的应力评估
W. Y. Huang, E. Chen, D. Jiang, Yu Po Wang, J. Chiang, F. Tsai, R. Huang, E. Lee, I. Chang
System in Package(SiP) includes technologies of Multi-chip Module(MCM), Multi-chip Package(MCP), stacked die, Package on Package(PoP), Package in Package(PiP) and Embedded substrate. While Au wire bonding technology is commonly used as current SIP interconnection solution, take Staked Die structure for example, with increasing stack die number the upper die needs longer wire bonding length for signal interconnection and results in lower electrical performance for whole system. In addition, wire bonding technology as Stacked die solution requires spacer die insertion between functional chips for bonding space and thus increases total package thickness. In order to achieve better electrical performance and reduce form factor, a new fine pitch bump technology of “Micro Bump” structure is developed with metal bump for both top and bottom chips. Micro bump structure is one of the key technologies of Trough Silicon Vias (TSV) and is used in chip to chip interconnection with the dimension of Micro bump smaller than typical flip chip bump.
系统级封装(SiP)技术包括多芯片模块(MCM)、多芯片封装(MCP)、堆叠芯片、封装上封装(PoP)、封装中封装(PiP)和嵌入式基板技术。目前的SIP互连方案通常采用Au线键合技术,以Staked Die结构为例,随着堆叠模数的增加,上模需要更长的线键合长度来进行信号互连,导致整个系统的电气性能下降。此外,线键合技术作为堆叠模解决方案,需要在功能芯片之间插入间隔模以增加键合空间,从而增加封装的总厚度。为了获得更好的电性能和减小外形尺寸,开发了一种新的“Micro bump”结构的细间距凸点技术,在顶部和底部芯片上都采用金属凸点。微凸点结构是槽式硅孔(TSV)的关键技术之一,用于芯片间互连,其尺寸小于典型的倒装芯片凸点。
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引用次数: 1
Impact of surface treatment on high frequency signal loss characteristics 表面处理对高频信号损耗特性的影响
A. Zee, R. Massey, H. Reischer
In multi-layer printed circuit board (PCB) manufacturing, adhesion promoters are applied between the inner layer copper surface and prepreg resin to ensure superior bonding reliability. Traditional adhesion promoters used over the last decade include processes such as black oxide and oxide replacement processes. Both inner layer bonding enhancement processes apply a coating or chemically etch the copper surface to create certain amount of roughness and provide mechanical bonding. Most oxide replacement processes also cover the roughened surface with organic coatings that further improves the inner layer adhesion through chemical bonding as well.
在多层印刷电路板(PCB)制造中,在内层铜表面和预浸料树脂之间使用粘合促进剂,以确保良好的粘合可靠性。过去十年中使用的传统附着力促进剂包括黑氧化物和氧化物替代工艺。这两种内层粘合增强工艺都采用涂层或化学蚀刻铜表面来产生一定程度的粗糙度并提供机械粘合。大多数氧化物替代工艺也用有机涂层覆盖粗糙的表面,通过化学结合进一步提高内层的附着力。
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引用次数: 5
A study for the new-type ACF applications of FCOF assembly 新型ACF在fof装配中的应用研究
W. Jong, S. Peng
Due to the environmental protection issues and regulations, a lot of electronic material suppliers try to search for the replacement materials which include the lead-free solder joints and the anisotropic conductive films (ACFs). ACF is widely used in high quality, excellent signal interconnection and fine pitch products. Nevertheless, during the fast flow and curing process of the electronic material, the risk of voiding may be increased. This study focuses on the characteristics and phenomena of a new-type ACF on the outer lead bonding (OLB) for flip chip on flex substrate (FCOF) assembly. Firstly, the thermal response and curing capability of the new-type ACF is investigated by the experiment. And the numerical simulation is used by computer aided engineering (CAE) that shows the heating effect of components on the bonding process. Both the simulated and experimental results can obtain the similar thermal behaviors. For the reliability assessment of the new-type ACF, the experiment procedures are adjusted three parameters of temperature, pressure and time under the bonding process. It can be easily discovered that the delaminations or cracks is caused by a lower compliance behavior of the interfaces between bumps on the polyimide (PI) substrate and indium tin oxides (ITOs) on the glass substrate. In order to evaluate the adhesive strength of ACF through the thermal loading, the strength of FCOF assembly is measured by a 90-degree peel test and is verified by the CAE simulation. In this study, the minimum peel strength of the new-type ACF has to be greater than 400 g/cm in order to satisfy the specification. Then, a stripped meshed model is simulated to understand the fracture growth between each interface under a constant speed of 8mm/sec. It can be found that the initial creak starts from the ACF-glass substrate interface and then propagates to the ITO. Finally, the swelling phenomenon of the new-type ACF is investigated. It shows that the swelling will not affect the structure of components and the reliability assessment is good.
由于环保问题和法规的要求,许多电子材料供应商试图寻找替代材料,其中包括无铅焊点和各向异性导电膜(ACFs)。ACF广泛应用于高质量、优良的信号互连和小间距产品。然而,在电子材料的快速流动和固化过程中,可能会增加空化的风险。本文研究了柔性基板上倒装芯片(fof)外引线键合(OLB)上新型ACF的特性和现象。首先,通过实验研究了新型ACF的热响应和固化性能。通过计算机辅助工程(CAE)的数值模拟,揭示了构件的热效应对粘接过程的影响。模拟结果和实验结果都可以得到相似的热行为。针对新型ACF的可靠性评估,调整了粘接过程中温度、压力和时间三个参数的实验程序。可以很容易地发现,分层或裂纹是由于聚酰亚胺(PI)衬底上的凸起与玻璃衬底上的铟锡氧化物(ito)之间的界面的顺应性较低引起的。为了通过热载荷评价ACF的粘接强度,采用90度剥离试验测量了FCOF组件的强度,并通过CAE模拟进行了验证。在本研究中,新型ACF的最小剥离强度必须大于400g /cm才能满足规范要求。然后,模拟了条带网格模型,以了解在8mm/sec恒定速度下各界面之间的断裂扩展情况。可以发现,初始裂纹从acf -玻璃基板界面开始,然后传播到ITO。最后对新型ACF的膨胀现象进行了研究。结果表明,膨胀不会影响构件的结构,可靠性评估良好。
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引用次数: 0
Development of CRC block onn FPGA for Zigbee standard 基于Zigbee标准的FPGA CRC块开发
R. Ahmad, O. Sidek, S. Mohd
CRC (Cyclic Redundanncy Check) block was developed on FPGA (Field Programmable Gate Array) in order to meet the needs for simple, low-power and low-cost wireless communication such as Zigbee. Zigbee operates primarily in the 2.4 GHz band, which makes the technology easily applicable and worldwide available. This paper gives a short overview of CRC block in the digital transmitter based on Zigbee Standard. CRC is the most preferred method of encoding because it provides very efficient protection against commonly occurring burst errors, and is easily implemented. The purpose of the research is to diversify the design methods by using the Verilog code entry through Xilinx ISE 8.2i. The Verilog code is used to characterize the CRC block behavior which is then simulated, synthesized and successfully implemented on Spartan3E XC3S500E FPGA. Here, the simulation and measurement results are also presented to verify the functionality of the CRC block. The data rate of CRC block is 250 kbps.
为了满足Zigbee等简单、低功耗、低成本的无线通信需求,在FPGA(现场可编程门阵列)上开发了CRC(循环冗余校验)块。Zigbee主要在2.4 GHz频段运行,这使得该技术易于应用并在全球范围内可用。本文简要介绍了基于Zigbee标准的数字发射机中的CRC分组。CRC是最受欢迎的编码方法,因为它对常见的突发错误提供了非常有效的保护,并且易于实现。该研究的目的是通过Xilinx ISE 8.2i使用Verilog代码条目来使设计方法多样化。Verilog代码用于描述CRC块行为,然后在Spartan3E XC3S500E FPGA上进行模拟,合成并成功实现。本文还给出了仿真和测量结果来验证CRC块的功能。CRC块的数据速率为250kbps。
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引用次数: 4
期刊
2009 4th International Microsystems, Packaging, Assembly and Circuits Technology Conference
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