A methodology is proposed to improve the efficiency of the substrate impedance extraction process for a large scale circuit by exploiting the circuit activity. Similarly biased regions of the substrate short-circuited by the ground network are identified to reduce the computational complexity of the extraction process. Each of these voltage domains is represented by a single equivalent input po...

This paper presents the experimental results for the leaching of printed circuit boards (PCB) from obsolete computers for extracting and recovering tin and copper by means of leaching followed by precipitation. Printed circuit boards were dismantled, cut into small pieces, and fed into a cylinder mill. The powder obtained was leached by using the aqueous solutions 2.18N H2SO4, 2.18N H2SO4 + 3.0...

The paper presents a hierarchical object recognition system for document processing. It is based on a spatial tree structure representation and Bayesian framework. The image components are built up from lower level image components stored in a library. The tree representations of the objects are assembled from these components. A probabilistic framework is used in order to get robust behaviour....

Accurate inductance calculations are critical for the design of both digital and analogue superconductive integrated circuits, and three-dimensional calculations are gaining importance with the advent of inductive biasing, inductive coupling and sky plane shielding for RSFQ cells. InductEx, an extraction programme based on the three-dimensional calculation software FastHenry, was proposed earli...

A practical parameter extraction method is presented for the Fourier-based-solution physics-based IGBT model. In the extraction procedure, only one simple clamped inductive load test is needed for the extraction of the eleven and thirteen parameters required for the NPT and PT IGBT models, respectively. Validation with experimental results from various structure IGBTs demonstrates the accuracy ...

Practical approaches for on-chip inductance extraction to obtain a sparse, stable and accurate inverse inductance matrix K are proposed. The novelty of our work is in using circuit characteristics to define the concept of resistance-dominant and inductancedominant lines. This notion is used to progressively refine a set of clusters that are inductively tightly-coupled. For reasonable designs, t...

We present a sensitivity study approach to evaluate the effects of interconnect variations on the performance of large, complicated circuits. The approach uses highly efficient designed experiments. The results from the study of a multiplier circuit are presented as an example. 1.0 Introduction TodayÆs submicron circuits require a sensitivity study of interconnect variation on circuit performan...

This paper gives an overview of the place of reverse engineering (RE) in the semiconductor industry, and the techniques used to obtain information from semiconductor products. The continuous drive of Moores law to increase the integration level of silicon chips has presented major challenges to the reverse engineer, obsolescing simple teardowns, and demanding the adoption of new and more sophis...