Varian Associates

About: Varian Associates is a based out in . It is known for research contribution in the topics: Beam (structure) & Wafer. The organization has 2160 authors who have published 2591 publications receiving 46002 citations.

NMR Probe coil form structure

Abstract: An RF probe for a gyromagnetic resonance spectrometer includes a coil cage for supporting the probe coil preferably within the cage formed of a number of rod-like members displaced parallel to the coil axis and spaced apart from the axis at a constant distance. Access to the coil through an axial continuous slot 46 or equivalent eliminates axial discontinuity in susceptibility due to discrete holes in the coil form.

Method for doping semiconductor wafers by rapid thermal processing of solid planar diffusion sources

Abstract: Doping of a semiconductor wafer is accomplished by placing the wafer in close proximity to a solid planar dopant source and rapidly heating the combination to a high temperature for a short time in a rapid thermal processing apparatus.

High voltage dc source including magnetic flux pole and multiple stacked ac to dc converter stages with planar coils

Abstract: A high voltage high power DC source includes a magnetic flux pole structure responsive to a high frequency, relatively low voltage source inductively coupled to the pole. Multiple AC to DC converters inductively coupled to the pole are connected in series, stacked relationship with each other, to derive the high voltage, high power DC output. Each stage includes a pair of oppositely wound planar coils on opposite sides of a printed circuit board. The printed circuits of the different stages are displaced from each other and a coil driven by the high frequency source.

Logarithmic rf amplifier employing successive detection

Abstract: A logarithmic radio frequency amplifier is disclosed which employs a series of cascaded RF amplifier stages. Each amplifier stage includes a detector for demodulating the output of each amplifier to produce a video signal. A limiter is provided for each detector for limiting the video signal output of each of the detectors. The limited video output from each successive stage is applied to a summing delay line to produce the logarithmic video output at the end of the delay line.