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Author

Tetsu Tanaka

Other affiliations: NTT DoCoMo, Tokyo Medical and Dental University, Fujitsu  ...read more
Bio: Tetsu Tanaka is an academic researcher from Tohoku University. The author has contributed to research in topics: Wafer & Chip. The author has an hindex of 38, co-authored 406 publications receiving 10375 citations. Previous affiliations of Tetsu Tanaka include NTT DoCoMo & Tokyo Medical and Dental University.
Topics: Wafer, Chip, Wafer bonding, Interposer, Flip chip


Papers
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Proceedings ArticleDOI
03 Jun 2020
TL;DR: In this article, the authors verify the effectiveness of room-temperature CVD named OER (Ozone-Ethylene Radical generation)-TEOS-CVD® to deposit a TSV liner SiO 2 layer.
Abstract: This paper deals with multichip-to-wafer (MC2W) 3D stacking technologies based on via-last TSV integration. In this work, we verify the effectiveness of room-temperature CVD named OER (Ozone-Ethylene Radical generation)-TEOS-CVD® to deposit a TSV liner SiO 2 layer. The film quality including dielectric constants is evaluated alternative to plasma-enhanced (PE)-TEOS-CVD SiO 2 . In addition, solid-solid inter-diffusion bonding of 3-μm-thick Sn with 0.5-μm-thick Au is demonstrated to achieve multiple multichip bonding for retinal prosthesis system fabrication with a 3D artificial retina chip. Low-temperature bonding at 190°C is realized by the Au/Sn metallurgy. Good bondability is also obtained with the Au electrodes preliminarily exposed at high temperature. There are no Sn microbump extrusion, which is highly expected to be used for 3D-ICs with fine-pitch solder microbump interconnection.

3 citations

Patent
19 Oct 2005
TL;DR: In this paper, a communication apparatus in a radio transmission system in which plural first communication apparatuses send the same transmission signals and a second communication apparatus receives the transmission signals is disclosed.
Abstract: A communication apparatus in a radio transmission system in which plural first communication apparatuses sends the same transmission signals and a second communication apparatus receives the transmission signals is disclosed. The communication apparatus functions as one of the plural first communication apparatuses, and the communication apparatus includes: a detection part for detecting a start or a stop of data transmission performed by a first communication apparatus that is different from the communication apparatus; and a guard interval length control part for controlling a guard interval length on the basis of a detection result of the detection part.

3 citations

Journal ArticleDOI
TL;DR: Increase in HbA1c and HOMA-IR was associated with PP in asymptomatic patients with type 2 DM, whereas increase in LDL-C was correlated to increase in NC.

3 citations

Proceedings ArticleDOI
28 Sep 2015
TL;DR: An implantable multichannel neural recording system with impedance analysis function with very small circuit area is introduced and impedances are acquired using agarose gel experiments.
Abstract: To enable chronic and stable neural recording, we introduce an implantable multichannel neural recording system with impedance analysis function. An important thing for high quality neural signal recording is how well recording electrodes are interfaced to tissue. We have proposed an impedance analysis circuit with very small circuit area which is implemented in multichannel neural recording and stimulating system. In this paper, we focus on the design of analysis circuit configuration and voltage measurement circuit. The proposed circuit has a very small circuit area of 0.23 mm 2 designed with 0.18-μm CMOS technology, and measures interface impedance with ultra wide range from 10 kΩ to 10 MΩ. In addition, we were also successful in acquiring impedances using agarose gel experiments.

3 citations


Cited by
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Journal ArticleDOI
11 Jun 1998-Nature
TL;DR: The complete genome sequence of the best-characterized strain of Mycobacterium tuberculosis, H37Rv, has been determined and analysed in order to improve the understanding of the biology of this slow-growing pathogen and to help the conception of new prophylactic and therapeutic interventions.
Abstract: Countless millions of people have died from tuberculosis, a chronic infectious disease caused by the tubercle bacillus. The complete genome sequence of the best-characterized strain of Mycobacterium tuberculosis, H37Rv, has been determined and analysed in order to improve our understanding of the biology of this slow-growing pathogen and to help the conception of new prophylactic and therapeutic interventions. The genome comprises 4,411,529 base pairs, contains around 4,000 genes, and has a very high guanine + cytosine content that is reflected in the biased amino-acid content of the proteins. M. tuberculosis differs radically from other bacteria in that a very large portion of its coding capacity is devoted to the production of enzymes involved in lipogenesis and lipolysis, and to two new families of glycine-rich proteins with a repetitive structure that may represent a source of antigenic variation.

7,779 citations

Journal ArticleDOI
TL;DR: Antiinflammatory therapy targeting the interleukin‐1β innate immunity pathway with canakinumab at a dose of 150 mg every 3 months led to a significantly lower rate of recurrent cardiovascular events than placebo, independent of lipid‐level lowering.
Abstract: BackgroundExperimental and clinical data suggest that reducing inflammation without affecting lipid levels may reduce the risk of cardiovascular disease. Yet, the inflammatory hypothesis of atherothrombosis has remained unproved. MethodsWe conducted a randomized, double-blind trial of canakinumab, a therapeutic monoclonal antibody targeting interleukin-1β, involving 10,061 patients with previous myocardial infarction and a high-sensitivity C-reactive protein level of 2 mg or more per liter. The trial compared three doses of canakinumab (50 mg, 150 mg, and 300 mg, administered subcutaneously every 3 months) with placebo. The primary efficacy end point was nonfatal myocardial infarction, nonfatal stroke, or cardiovascular death. ResultsAt 48 months, the median reduction from baseline in the high-sensitivity C-reactive protein level was 26 percentage points greater in the group that received the 50-mg dose of canakinumab, 37 percentage points greater in the 150-mg group, and 41 percentage points greater in t...

5,660 citations

Journal ArticleDOI
31 Aug 2000-Nature
TL;DR: It is proposed that the size and complexity of the P. aeruginosa genome reflect an evolutionary adaptation permitting it to thrive in diverse environments and resist the effects of a variety of antimicrobial substances.
Abstract: Pseudomonas aeruginosa is a ubiquitous environmental bacterium that is one of the top three causes of opportunistic human infections. A major factor in its prominence as a pathogen is its intrinsic resistance to antibiotics and disinfectants. Here we report the complete sequence of P. aeruginosa strain PAO1. At 6.3 million base pairs, this is the largest bacterial genome sequenced, and the sequence provides insights into the basis of the versatility and intrinsic drug resistance of P. aeruginosa. Consistent with its larger genome size and environmental adaptability, P. aeruginosa contains the highest proportion of regulatory genes observed for a bacterial genome and a large number of genes involved in the catabolism, transport and efflux of organic compounds as well as four potential chemotaxis systems. We propose that the size and complexity of the P. aeruginosa genome reflect an evolutionary adaptation permitting it to thrive in diverse environments and resist the effects of a variety of antimicrobial substances.

4,220 citations