Yoshihiko Yokoyama

Optimization for chip stack in 3-D packaging

We have been developing three-dimensional (3-D) packaging technology for forming through-type electrodes in chips that are then directly connected in stacks. The model examined in this study is defined by its simple structure. The structure was optimized for successful connection in a chip stack without degrading the features of the chips. The use of this structure enabled a stable and rigid connection, and a four-layer chip stack assembled on a ceramic substrate exhibited adequate thermal cycle performance. This paper discusses how the structure of terminals was optimized for chip stacking. A finished package assembled from static random access memory (SRAM) with through-type electrodes was confirmed to operate well and exhibit normal functioning.

EBM-based Clinical Guidelines for Pancreatic Cancer (2013) Issued by the Japan Pancreas Society: A Synopsis

Clinical practice guidelines for pancreatic cancer based on evidence-based medicine (2006) were published by the Japan Pancreas Society (Committee for revision of clinical guidelines for pancreatic cancer) in March 2009 in Japanese, revised to Clinical Practice Guidelines for Pancreatic Cancer based on evidence-based medicine (2009) in July 2009 in Japanese and further revised to Clinical Practice Guidelines for Pancreatic Cancer (2013) in October 2013 in Japanese. These guidelines were established according to evidence-based medicine. A total of 629 papers were collected from among 4612 reports concerning pancreatic cancer listed in PubMed and Igakuchuo Zasshi between May 2007 and January 2011. This new set of guidelines was written by members of the Committee for the Revision of Clinical Practice Guidelines for Pancreatic Cancer in the Japan Pancreas Society. The guidelines provide an algorithm for the diagnosis (Fig. 1) and treatment (Fig. 2) of pancreatic cancer and address six subjects (Diagnosis, Surgery, Adjuvant therapy, Radiation therapy, Chemotherapy and stent therapy), with 35 clinical questions and 57 recommendations.