STMicroelectronics

About: STMicroelectronics is a company organization based out in Geneva, Switzerland. It is known for research contribution in the topics: Signal & Transistor. The organization has 17172 authors who have published 29543 publications receiving 300766 citations. The organization is also known as: SGS-Thomson & STM.

Semiconductor wafer thinning

Abstract: The invention concerns a method for thinning a first semiconductor wafer (1) from a first side (12), which consists in applying, on the second side of the first wafer, a second wafer (3) with an interposed photoresist layer (2).

An 80-Gb/s 2/sup 31/-1 pseudorandom binary sequence generator in SiGe BiCMOS technology

Abstract: A 2/sup 31/-1 pseudorandom binary sequence (PRBS) generator with adjustable output data rates up to 80 Gb/s is reported in a production 130-nm BiCMOS process with 150-GHz f/sub T/ SiGe heterojunction bipolar transistor (HBT). The pseudorandom sequence is generated at 20 Gb/s using a linear feedback shift register (FSR), which is then multiplexed up to 80 Gb/s with a 4:1 multiplexer. A BiCMOS logic family combining MOSFETs and SiGe HBTs on high-speed paths is employed throughout the PRBS generator to maximize building block switching speed. Adjustable delay cells are inserted into critical clock paths to improve timing margins throughout the system. The PRBS generator consumes 9.8 W from a 3.3-V supply and can deliver an output voltage swing of up to 430 mV single-ended at 80 Gb/s.

Analysis and modeling of layout scaling in silicon integrated stacked transformers

Abstract: The analysis and modeling of monolithic stacked transformers fabricated in a high-speed silicon bipolar technology is addressed. On-wafer experimental measurements are employed to investigate the effect of layout scaling on transformer performance parameters (i.e., self-resonance frequency, magnetic coupling coefficient, and insertion loss). Based on this analysis, a wideband lumped model is developed, whose parameters are related to layout and technological data through closed-form expressions. Model accuracy is demonstrated by comparing simulated and measured S-parameters, coil inductance, magnetic coupling coefficient, and maximum available gain of several transformers with scaled layout geometry. The self-resonance frequency is also employed as a figure-of-merit to demonstrate model accuracy at very high frequency.

Bilateral Robot Teleoperation: A Wearable Arm Exoskeleton Featuring an Intuitive User Interface

Abstract: Teleoperation systems are used when human planning and decision-making capabilities are needed during robotic remote operations. To execute meaningful tasks remotely, the operator has to be able to simultaneously control multiple degrees of freedom (DoFs) of the slave robot and efficiently receive information from the remote site. In these cases, haptic feedback has been shown to improve the operator's task execution performance [1].

Nonlinear dynamics of vibrating MEMS

Abstract: Let us consider a MEMS translational gyroscope. When significantly displacing the proof mass, the nonlinear hardening characteristic of the supporting beams becomes visible. Thus, the resonance peak of the structure bends towards the higher frequencies. This property is useful to easily synchronise sense and drive resonances thus increasing the sensibility of the MEMS gyroscope. Through a test structure designed to access the high deformation range of the supporting beams, its nonlinear vibrations were investigated both experimentally and numerically. It is shown that a simple nonlinear lumped parameter model is sufficient to schematise the gyroscope and that a semi-analytical integration method allows to quickly determine both stable and unstable branches of the system's dynamic response.