950 research outputs found
Technologies for 3D Heterogeneous Integration
3D-Integration is a promising technology towards higher interconnect
densities and shorter wiring lengths between multiple chip stacks, thus
achieving a very high performance level combined with low power consumption.
This technology also offers the possibility to build up systems with high
complexity just by combining devices of different technologies. For ultra thin
silicon is the base of this integration technology, the fundamental processing
steps will be described, as well as appropriate handling concepts. Three main
concepts for 3D integration have been developed at IZM. The approach with the
greatest flexibility called Inter Chip Via - Solid Liquid Interdiffusion
(ICV-SLID) is introduced. This is a chip-to-wafer stacking technology which
combines the advantages of the Inter Chip Via (ICV) process and the
solid-liquid-interdiffusion technique (SLID) of copper and tin. The fully
modular ICV-SLID concept allows the formation of multiple device stacks. A test
chip was designed and the total process sequence of the ICV-SLID technology for
the realization of a three-layer chip-to-wafer stack was demonstrated. The
proposed wafer-level 3D integration concept has the potential for low cost
fabrication of multi-layer high-performance 3D-SoCs and is well suited as a
replacement for embedded technologies based on monolithic integration. To
address yield issues a wafer-level chip-scale handling is presented as well, to
select known-good dies and work on them with wafer-level process sequences
before joining them to integrated stacks.Comment: Submitted on behalf of EDA Publishing Association
(http://irevues.inist.fr/handle/2042/16838
Wave scattering by small bodies and creating materials with a desired refraction coefficient
Asymptotic solution to many-body wave scattering problem is given in the case
of many small scatterers. The small scatterers can be particles whose physical
properties are described by the boundary impedances, or they can be small
inhomogeneities, whose physical properties are described by their refraction
coefficients. Equations for the effective field in the limiting medium are
derived. The limit is considered as the size of the particles or
inhomogeneities tends to zero while their number tends to infinity.
These results are applied to the problem of creating materials with a desired
refraction coefficient. For example, the refraction coefficient may have
wave-focusing property, or it may have negative refraction, i.e., the group
velocity may be directed opposite to the phase velocity. This paper is a review
of the author's results presented in MR2442305 (2009g:78016), MR2354140
(2008g:82123), MR2317263 (2008a:35040), MR2362884 (2008j:78010), and contains
new results.Comment: In this paper the author's invited plenary talk at the 7-th PACOM
(PanAfrican Congress of Mathematicians), is presente
Spectroscopy of annular drums and quantum rings: perturbative and nonperturbative results
We obtain systematic approximations to the states (energies and wave
functions) of quantum rings (annular drums) of arbitrary shape by conformally
mapping the annular domain to a simply connected domain. Extending the general
results of Ref.\cite{Amore09} we obtain an analytical formula for the spectrum
of quantum ring of arbirtrary shape: for the cases of a circular annulus and of
a Robnik ring considered here this formula is remarkably simple and precise. We
also obtain precise variational bounds for the ground state of different
quantum rings. Finally we extend the Conformal Collocation Method of
\cite{Amore08,Amore09} to the class of problems considered here and calculate
precise numerical solutions for a large number of states ().Comment: 12 pages, 12 figures, 2 table
3D System Integration for high density Interconnects
3D-Integration is a promising technology towards higher interconnect densities and shorter wiring lengths between multiple chip stacks, thus achieving a very high performance level combined with low power consumption. This technology also offers the possibility to build up systems with high complexity by combining devices of different technologies. The fundamental processing steps will be described, as well as appropriate handling concepts and first electrical results of realized 3D-integrated stacks
Mass-sensitive particle tracking to elucidate the membrane-associated MinDE reaction cycle
An iSCAT image processing and analysis strategy enables mass-sensitive particle tracking (MSPT) of single unlabeled biomolecules on a supported lipid bilayer. MSPT was used to observe the (dis-)assembly of membrane complexes in real-time. In spite of their great importance in biology, methods providing access to spontaneous molecular interactions with and on biological membranes have been sparse. The recent advent of mass photometry to quantify mass distributions of unlabeled biomolecules landing on surfaces raised hopes that this approach could be transferred to membranes. Here, by introducing a new interferometric scattering (iSCAT) image processing and analysis strategy adapted to diffusing particles, we enable mass-sensitive particle tracking (MSPT) of single unlabeled biomolecules on a supported lipid bilayer. We applied this approach to the highly nonlinear reaction cycles underlying MinDE protein self-organization. MSPT allowed us to determine the stoichiometry and turnover of individual membrane-bound MinD/MinDE protein complexes and to quantify their size-dependent diffusion. This study demonstrates the potential of MSPT to enhance our quantitative understanding of membrane-associated biological systems.We thank D. Bollschweiler (Cryo-EM MPIB Core Facility) for the initial introduction to the commercial Refeyn OneMP mass photometer, the MPIB Biochemistry Core Facility (Recombinant Protein Production)
Analisa Pasar Proyek Mini Market
Usaha mini market telah menggeser posisi pasar-pasar tradisional sebagai tempat perbelanjaan kebutuhan bahan pokok sehari-hari, sehingga USAha pendiriannya akan memberikan prospek yang lebih baik pada masa sekarang dan yang akan datang. Berdasarkan Analisa Persediaan (Supply Analysis), Analisa Permintaan (Demand Analysis) dan Analisa Persaingan Pasar, USAha pendirian mini market di kelurahan Keputih Kecamatan Sukolilo Surabaya dengan jumlah pertumbuhan penduduk 2,11 % pertahun dan jumlah penduduk miskin sekitar 10,77 % masih memiliki potensi yang sangat besar untuk didirikan. Tujuan Penulisan adalah untuk mengetahui analisa pasar proyek USAha mini market yang masih memiliki peluang besar untuk didirikan seiring dengan kebutuhan masyarakat yang terus meningkat
High frequency limit of the Transport Cross Section and boundedness of the Total Cross Section in scattering by an obstacle with impedance boundary conditions
The scalar scattering of the plane wave by a strictly convex obstacle with
impedance boundary conditions is considered. The uniform boundedness of the
Total Cross Section for all values of frequencies is proved. The high frequency
limit of the Transport Cross Section is founded and presented as a classical
functional of the variational theory
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