Attributes of Advanced Thinning and Planarization Processes in 2.5D and 3D Packaging Recognized by Market Demands

Author(s):  
Frank Wei

During the fabrications of 2.5D and 3D advanced packages, the needs for intermediate thinning and planarization processes persistently exit. This paper highlights the attributes of successful implementations, i.e., increased performances and yields for these processes, which have been identified by the market requirements for a variety of applications. Different packages with different materials systems and product goals lead to different requirements. This paper includes the thinning and polishing of TSV wafers in bonded wafer pairs for Si IC devicess or interposers, the thinning of overmolded, reconstituted wafers in eWLB applications, and the planarizations of metal bumps and RDL features in PoP, CSP, or fine line-and-space (L/S) substrate fabrications.

Author(s):  
K. Sanchez ◽  
G. Bascoul ◽  
F. Infante ◽  
N. Courjault ◽  
T. Nakamura

Abstract Magnetic field imaging is a well-known technique which gives the possibility to study the internal activity of electronic components in a contactless and non-invasive way. Additional data processing can convert the magnetic field image into a current path and give the possibility to identify current flow anomalies in electronic devices. This technique can be applied at board level or device level and is particularly suitable for the failure analysis of complex packages (stacked device & 3D packaging). This approach can be combined with thermal imaging, X-ray observation and other failure analysis tool. This paper will present two different techniques which give the possibility to measure the magnetic field in two dimensions over an active device. Same device and same level of current is used for the two techniques to give the possibility to compare the performance.


Author(s):  
Zhiheng Huang ◽  
Zhiyong Wu ◽  
Hua Xiong ◽  
Yucheng Ma

Abstract Microstructure and its effect on mechanical behavior of ultrafine interconnects have been studied in this paper using a modeling approach. The microstructure from the processes of solidification, spinodal decomposition, and grain growth in ultrafine interconnects has highlighted its importance. The size, geometry and composition of interconnects as well as the elastic energy can influence microstructure and thus the mechanical behavior. Quantification of microstructure in ultrafine interconnects is a necessary step to establish the linkage between microstructure and reliability.


Author(s):  
Janet O'Shea
Keyword(s):  

This chapter continues the examination of how martial arts differ from violence by delving into the symbolism attached to sport fighting. Here, this section investigates the significance of seemingly small gestures such as handshakes and fist bumps, treating them as play markers that separate the mat or the ring from the outside world. The rich symbolism of play markers run alongside an inversion of the meaning attached to strikes: in the outside world a punch devalues, whereas in sport fighting it signals respect for an opponent’s abilities. In this sense, sport fighting differentiates but also walks a fine line between the form and the function of violence. This consideration of significance in martial arts practice includes an investigation of martial arts and combat sport’s vexed relationship to real violence.


Author(s):  
Zhao Yongrui ◽  
Ma Hongbo ◽  
Bi Minglu ◽  
Huang Zhanwu ◽  
Jia Jun ◽  
...  

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